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/*
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* Copyright 1999-2006 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package com.sun.tools.javac.code;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Set;
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import java.util.concurrent.Callable;
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import javax.lang.model.element.*;
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import javax.lang.model.type.ReferenceType;
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import javax.lang.model.type.TypeMirror;
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import javax.tools.JavaFileObject;
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import com.sun.tools.javac.util.*;
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import com.sun.tools.javac.util.Name;
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import com.sun.tools.javac.code.Type.*;
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import com.sun.tools.javac.comp.Attr;
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import com.sun.tools.javac.comp.AttrContext;
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import com.sun.tools.javac.comp.Env;
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import com.sun.tools.javac.jvm.*;
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import com.sun.tools.javac.model.*;
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import com.sun.tools.javac.tree.JCTree;
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import static com.sun.tools.javac.code.Flags.*;
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import static com.sun.tools.javac.code.Kinds.*;
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import static com.sun.tools.javac.code.TypeTags.*;
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/** Root class for Java symbols. It contains subclasses
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* for specific sorts of symbols, such as variables, methods and operators,
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* types, packages. Each subclass is represented as a static inner class
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* inside Symbol.
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*
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* <p><b>This is NOT part of any API supported by Sun Microsystems. If
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* you write code that depends on this, you do so at your own risk.
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* This code and its internal interfaces are subject to change or
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* deletion without notice.</b>
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*/
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public abstract class Symbol implements Element {
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// public Throwable debug = new Throwable();
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/** The kind of this symbol.
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* @see Kinds
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*/
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public int kind;
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/** The flags of this symbol.
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*/
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public long flags_field;
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/** An accessor method for the flags of this symbol.
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* Flags of class symbols should be accessed through the accessor
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* method to make sure that the class symbol is loaded.
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*/
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public long flags() { return flags_field; }
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/** The attributes of this symbol.
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*/
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public List<Attribute.Compound> attributes_field;
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/** An accessor method for the attributes of this symbol.
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* Attributes of class symbols should be accessed through the accessor
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* method to make sure that the class symbol is loaded.
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*/
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public List<Attribute.Compound> getAnnotationMirrors() {
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assert attributes_field != null;
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return attributes_field;
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}
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/** Fetch a particular annotation from a symbol. */
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public Attribute.Compound attribute(Symbol anno) {
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for (Attribute.Compound a : getAnnotationMirrors())
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if (a.type.tsym == anno) return a;
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return null;
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}
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/** The name of this symbol in Utf8 representation.
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*/
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public Name name;
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/** The type of this symbol.
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*/
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public Type type;
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/** The owner of this symbol.
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*/
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public Symbol owner;
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/** The completer of this symbol.
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*/
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public Completer completer;
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/** A cache for the type erasure of this symbol.
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*/
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public Type erasure_field;
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/** Construct a symbol with given kind, flags, name, type and owner.
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*/
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public Symbol(int kind, long flags, Name name, Type type, Symbol owner) {
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this.kind = kind;
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this.flags_field = flags;
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this.type = type;
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this.owner = owner;
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this.completer = null;
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this.erasure_field = null;
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this.attributes_field = List.nil();
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this.name = name;
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}
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/** Clone this symbol with new owner.
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* Legal only for fields and methods.
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*/
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public Symbol clone(Symbol newOwner) {
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throw new AssertionError();
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}
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/** The Java source which this symbol represents.
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* A description of this symbol; overrides Object.
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*/
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public String toString() {
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return name.toString();
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}
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/** A Java source description of the location of this symbol; used for
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* error reporting. Use of this method may result in the loss of the
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* symbol's description.
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*/
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public String location() {
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if (owner.name == null || (owner.name.len == 0 && owner.kind != PCK)) {
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return "";
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}
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return owner.toString();
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}
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public String location(Type site, Types types) {
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if (owner.name == null || owner.name.len == 0) {
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return location();
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}
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if (owner.type.tag == CLASS) {
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Type ownertype = types.asOuterSuper(site, owner);
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if (ownertype != null) return ownertype.toString();
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}
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return owner.toString();
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}
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/** The symbol's erased type.
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*/
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public Type erasure(Types types) {
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if (erasure_field == null)
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erasure_field = types.erasure(type);
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return erasure_field;
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}
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/** The external type of a symbol. This is the symbol's erased type
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* except for constructors of inner classes which get the enclosing
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* instance class added as first argument.
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*/
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public Type externalType(Types types) {
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Type t = erasure(types);
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if (name == name.table.init && owner.hasOuterInstance()) {
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Type outerThisType = types.erasure(owner.type.getEnclosingType());
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return new MethodType(t.getParameterTypes().prepend(outerThisType),
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t.getReturnType(),
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t.getThrownTypes(),
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t.tsym);
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} else {
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return t;
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}
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}
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public boolean isStatic() {
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return
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(flags() & STATIC) != 0 ||
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(owner.flags() & INTERFACE) != 0 && kind != MTH;
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}
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public boolean isInterface() {
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return (flags() & INTERFACE) != 0;
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}
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/** Is this symbol declared (directly or indirectly) local
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* to a method or variable initializer?
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* Also includes fields of inner classes which are in
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* turn local to a method or variable initializer.
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*/
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public boolean isLocal() {
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return
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(owner.kind & (VAR | MTH)) != 0 ||
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(owner.kind == TYP && owner.isLocal());
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}
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/** Is this symbol a constructor?
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*/
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public boolean isConstructor() {
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return name == name.table.init;
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}
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/** The fully qualified name of this symbol.
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* This is the same as the symbol's name except for class symbols,
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* which are handled separately.
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*/
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public Name getQualifiedName() {
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return name;
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}
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/** The fully qualified name of this symbol after converting to flat
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* representation. This is the same as the symbol's name except for
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* class symbols, which are handled separately.
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*/
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public Name flatName() {
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return getQualifiedName();
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}
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/** If this is a class or package, its members, otherwise null.
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*/
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public Scope members() {
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return null;
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}
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/** A class is an inner class if it it has an enclosing instance class.
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*/
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public boolean isInner() {
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return type.getEnclosingType().tag == CLASS;
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}
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/** An inner class has an outer instance if it is not an interface
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* it has an enclosing instance class which might be referenced from the class.
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* Nested classes can see instance members of their enclosing class.
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* Their constructors carry an additional this$n parameter, inserted
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* implicitly by the compiler.
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*
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* @see #isInner
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*/
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public boolean hasOuterInstance() {
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return
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type.getEnclosingType().tag == CLASS && (flags() & (INTERFACE | NOOUTERTHIS)) == 0;
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}
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/** The closest enclosing class of this symbol's declaration.
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*/
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public ClassSymbol enclClass() {
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Symbol c = this;
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while (c != null &&
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((c.kind & TYP) == 0 || c.type.tag != CLASS)) {
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c = c.owner;
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}
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return (ClassSymbol)c;
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}
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/** The outermost class which indirectly owns this symbol.
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*/
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public ClassSymbol outermostClass() {
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Symbol sym = this;
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Symbol prev = null;
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while (sym.kind != PCK) {
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prev = sym;
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sym = sym.owner;
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}
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return (ClassSymbol) prev;
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}
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/** The package which indirectly owns this symbol.
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*/
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public PackageSymbol packge() {
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Symbol sym = this;
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while (sym.kind != PCK) {
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sym = sym.owner;
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}
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return (PackageSymbol) sym;
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}
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/** Is this symbol a subclass of `base'? Only defined for ClassSymbols.
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*/
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public boolean isSubClass(Symbol base, Types types) {
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throw new AssertionError("isSubClass " + this);
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}
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/** Fully check membership: hierarchy, protection, and hiding.
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* Does not exclude methods not inherited due to overriding.
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*/
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public boolean isMemberOf(TypeSymbol clazz, Types types) {
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return
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owner == clazz ||
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clazz.isSubClass(owner, types) &&
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isInheritedIn(clazz, types) &&
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!hiddenIn((ClassSymbol)clazz, types);
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}
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/** Is this symbol the same as or enclosed by the given class? */
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public boolean isEnclosedBy(ClassSymbol clazz) {
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for (Symbol sym = this; sym.kind != PCK; sym = sym.owner)
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if (sym == clazz) return true;
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return false;
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}
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/** Check for hiding. Note that this doesn't handle multiple
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* (interface) inheritance. */
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private boolean hiddenIn(ClassSymbol clazz, Types types) {
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if (kind == MTH && (flags() & STATIC) == 0) return false;
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while (true) {
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if (owner == clazz) return false;
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Scope.Entry e = clazz.members().lookup(name);
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while (e.scope != null) {
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if (e.sym == this) return false;
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if (e.sym.kind == kind &&
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(kind != MTH ||
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(e.sym.flags() & STATIC) != 0 &&
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types.isSubSignature(e.sym.type, type)))
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return true;
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e = e.next();
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}
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Type superType = types.supertype(clazz.type);
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if (superType.tag != TypeTags.CLASS) return false;
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clazz = (ClassSymbol)superType.tsym;
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}
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}
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/** Is this symbol inherited into a given class?
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* PRE: If symbol's owner is a interface,
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* it is already assumed that the interface is a superinterface
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* of given class.
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* @param clazz The class for which we want to establish membership.
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* This must be a subclass of the member's owner.
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*/
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public boolean isInheritedIn(Symbol clazz, Types types) {
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switch ((int)(flags_field & Flags.AccessFlags)) {
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default: // error recovery
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case PUBLIC:
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return true;
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case PRIVATE:
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return this.owner == clazz;
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case PROTECTED:
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// we model interfaces as extending Object
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return (clazz.flags() & INTERFACE) == 0;
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case 0:
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PackageSymbol thisPackage = this.packge();
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for (Symbol sup = clazz;
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sup != null && sup != this.owner;
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sup = types.supertype(sup.type).tsym) {
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if (sup.type.isErroneous())
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return true; // error recovery
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if ((sup.flags() & COMPOUND) != 0)
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continue;
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if (sup.packge() != thisPackage)
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return false;
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}
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return (clazz.flags() & INTERFACE) == 0;
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}
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}
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/** The (variable or method) symbol seen as a member of given
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* class type`site' (this might change the symbol's type).
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* This is used exclusively for producing diagnostics.
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*/
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public Symbol asMemberOf(Type site, Types types) {
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throw new AssertionError();
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}
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/** Does this method symbol override `other' symbol, when both are seen as
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* members of class `origin'? It is assumed that _other is a member
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* of origin.
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*
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* It is assumed that both symbols have the same name. The static
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* modifier is ignored for this test.
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*
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* See JLS 8.4.6.1 (without transitivity) and 8.4.6.4
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*/
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public boolean overrides(Symbol _other, TypeSymbol origin, Types types, boolean checkResult) {
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return false;
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}
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/** Complete the elaboration of this symbol's definition.
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|
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*/
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public void complete() throws CompletionFailure {
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if (completer != null) {
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Completer c = completer;
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completer = null;
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c.complete(this);
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}
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}
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/** True if the symbol represents an entity that exists.
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*/
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|
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public boolean exists() {
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return true;
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|
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}
|
|
409 |
|
|
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public Type asType() {
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return type;
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}
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413 |
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public Symbol getEnclosingElement() {
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return owner;
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}
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|
417 |
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418 |
public ElementKind getKind() {
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return ElementKind.OTHER; // most unkind
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420 |
}
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|
421 |
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|
422 |
public Set<Modifier> getModifiers() {
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|
423 |
return Flags.asModifierSet(flags());
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|
424 |
}
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|
425 |
|
|
426 |
public Name getSimpleName() {
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|
427 |
return name;
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|
428 |
}
|
|
429 |
|
|
430 |
/**
|
|
431 |
* @deprecated this method should never be used by javac internally.
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|
432 |
*/
|
|
433 |
@Deprecated
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|
434 |
public <A extends java.lang.annotation.Annotation> A getAnnotation(Class<A> annoType) {
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|
435 |
return JavacElements.getAnnotation(this, annoType);
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|
436 |
}
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|
437 |
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|
438 |
// TODO: getEnclosedElements should return a javac List, fix in FilteredMemberList
|
|
439 |
public java.util.List<Symbol> getEnclosedElements() {
|
|
440 |
return List.nil();
|
|
441 |
}
|
|
442 |
|
|
443 |
public List<TypeSymbol> getTypeParameters() {
|
|
444 |
ListBuffer<TypeSymbol> l = ListBuffer.lb();
|
|
445 |
for (Type t : type.getTypeArguments()) {
|
|
446 |
l.append(t.tsym);
|
|
447 |
}
|
|
448 |
return l.toList();
|
|
449 |
}
|
|
450 |
|
|
451 |
public static class DelegatedSymbol extends Symbol {
|
|
452 |
protected Symbol other;
|
|
453 |
public DelegatedSymbol(Symbol other) {
|
|
454 |
super(other.kind, other.flags_field, other.name, other.type, other.owner);
|
|
455 |
this.other = other;
|
|
456 |
}
|
|
457 |
public String toString() { return other.toString(); }
|
|
458 |
public String location() { return other.location(); }
|
|
459 |
public String location(Type site, Types types) { return other.location(site, types); }
|
|
460 |
public Type erasure(Types types) { return other.erasure(types); }
|
|
461 |
public Type externalType(Types types) { return other.externalType(types); }
|
|
462 |
public boolean isLocal() { return other.isLocal(); }
|
|
463 |
public boolean isConstructor() { return other.isConstructor(); }
|
|
464 |
public Name getQualifiedName() { return other.getQualifiedName(); }
|
|
465 |
public Name flatName() { return other.flatName(); }
|
|
466 |
public Scope members() { return other.members(); }
|
|
467 |
public boolean isInner() { return other.isInner(); }
|
|
468 |
public boolean hasOuterInstance() { return other.hasOuterInstance(); }
|
|
469 |
public ClassSymbol enclClass() { return other.enclClass(); }
|
|
470 |
public ClassSymbol outermostClass() { return other.outermostClass(); }
|
|
471 |
public PackageSymbol packge() { return other.packge(); }
|
|
472 |
public boolean isSubClass(Symbol base, Types types) { return other.isSubClass(base, types); }
|
|
473 |
public boolean isMemberOf(TypeSymbol clazz, Types types) { return other.isMemberOf(clazz, types); }
|
|
474 |
public boolean isEnclosedBy(ClassSymbol clazz) { return other.isEnclosedBy(clazz); }
|
|
475 |
public boolean isInheritedIn(Symbol clazz, Types types) { return other.isInheritedIn(clazz, types); }
|
|
476 |
public Symbol asMemberOf(Type site, Types types) { return other.asMemberOf(site, types); }
|
|
477 |
public void complete() throws CompletionFailure { other.complete(); }
|
|
478 |
|
|
479 |
public <R, P> R accept(ElementVisitor<R, P> v, P p) {
|
|
480 |
return other.accept(v, p);
|
|
481 |
}
|
|
482 |
}
|
|
483 |
|
|
484 |
/** A class for type symbols. Type variables are represented by instances
|
|
485 |
* of this class, classes and packages by instances of subclasses.
|
|
486 |
*/
|
|
487 |
public static class TypeSymbol
|
|
488 |
extends Symbol implements TypeParameterElement {
|
|
489 |
// Implements TypeParameterElement because type parameters don't
|
|
490 |
// have their own TypeSymbol subclass.
|
|
491 |
// TODO: type parameters should have their own TypeSymbol subclass
|
|
492 |
|
|
493 |
public TypeSymbol(long flags, Name name, Type type, Symbol owner) {
|
|
494 |
super(TYP, flags, name, type, owner);
|
|
495 |
}
|
|
496 |
|
|
497 |
/** form a fully qualified name from a name and an owner
|
|
498 |
*/
|
|
499 |
static public Name formFullName(Name name, Symbol owner) {
|
|
500 |
if (owner == null) return name;
|
|
501 |
if (((owner.kind != ERR)) &&
|
|
502 |
((owner.kind & (VAR | MTH)) != 0
|
|
503 |
|| (owner.kind == TYP && owner.type.tag == TYPEVAR)
|
|
504 |
)) return name;
|
|
505 |
Name prefix = owner.getQualifiedName();
|
|
506 |
if (prefix == null || prefix == prefix.table.empty)
|
|
507 |
return name;
|
|
508 |
else return prefix.append('.', name);
|
|
509 |
}
|
|
510 |
|
|
511 |
/** form a fully qualified name from a name and an owner, after
|
|
512 |
* converting to flat representation
|
|
513 |
*/
|
|
514 |
static public Name formFlatName(Name name, Symbol owner) {
|
|
515 |
if (owner == null ||
|
|
516 |
(owner.kind & (VAR | MTH)) != 0
|
|
517 |
|| (owner.kind == TYP && owner.type.tag == TYPEVAR)
|
|
518 |
) return name;
|
|
519 |
char sep = owner.kind == TYP ? '$' : '.';
|
|
520 |
Name prefix = owner.flatName();
|
|
521 |
if (prefix == null || prefix == prefix.table.empty)
|
|
522 |
return name;
|
|
523 |
else return prefix.append(sep, name);
|
|
524 |
}
|
|
525 |
|
|
526 |
/**
|
|
527 |
* A total ordering between type symbols that refines the
|
|
528 |
* class inheritance graph.
|
|
529 |
*
|
|
530 |
* Typevariables always precede other kinds of symbols.
|
|
531 |
*/
|
|
532 |
public final boolean precedes(TypeSymbol that, Types types) {
|
|
533 |
if (this == that)
|
|
534 |
return false;
|
|
535 |
if (this.type.tag == that.type.tag) {
|
|
536 |
if (this.type.tag == CLASS) {
|
|
537 |
return
|
|
538 |
types.rank(that.type) < types.rank(this.type) ||
|
|
539 |
types.rank(that.type) == types.rank(this.type) &&
|
|
540 |
that.getQualifiedName().compareTo(this.getQualifiedName()) < 0;
|
|
541 |
} else if (this.type.tag == TYPEVAR) {
|
|
542 |
return types.isSubtype(this.type, that.type);
|
|
543 |
}
|
|
544 |
}
|
|
545 |
return this.type.tag == TYPEVAR;
|
|
546 |
}
|
|
547 |
|
|
548 |
// For type params; overridden in subclasses.
|
|
549 |
public ElementKind getKind() {
|
|
550 |
return ElementKind.TYPE_PARAMETER;
|
|
551 |
}
|
|
552 |
|
|
553 |
public java.util.List<Symbol> getEnclosedElements() {
|
|
554 |
List<Symbol> list = List.nil();
|
|
555 |
for (Scope.Entry e = members().elems; e != null; e = e.sibling) {
|
|
556 |
if (e.sym != null && (e.sym.flags() & SYNTHETIC) == 0 && e.sym.owner == this)
|
|
557 |
list = list.prepend(e.sym);
|
|
558 |
}
|
|
559 |
return list;
|
|
560 |
}
|
|
561 |
|
|
562 |
// For type params.
|
|
563 |
// Perhaps not needed if getEnclosingElement can be spec'ed
|
|
564 |
// to do the same thing.
|
|
565 |
// TODO: getGenericElement() might not be needed
|
|
566 |
public Symbol getGenericElement() {
|
|
567 |
return owner;
|
|
568 |
}
|
|
569 |
|
|
570 |
public <R, P> R accept(ElementVisitor<R, P> v, P p) {
|
|
571 |
assert type.tag == TYPEVAR; // else override will be invoked
|
|
572 |
return v.visitTypeParameter(this, p);
|
|
573 |
}
|
|
574 |
|
|
575 |
public List<Type> getBounds() {
|
|
576 |
TypeVar t = (TypeVar)type;
|
|
577 |
Type bound = t.getUpperBound();
|
|
578 |
if (!bound.isCompound())
|
|
579 |
return List.of(bound);
|
|
580 |
ClassType ct = (ClassType)bound;
|
|
581 |
if (!ct.tsym.erasure_field.isInterface()) {
|
|
582 |
return ct.interfaces_field.prepend(ct.supertype_field);
|
|
583 |
} else {
|
|
584 |
// No superclass was given in bounds.
|
|
585 |
// In this case, supertype is Object, erasure is first interface.
|
|
586 |
return ct.interfaces_field;
|
|
587 |
}
|
|
588 |
}
|
|
589 |
}
|
|
590 |
|
|
591 |
/** A class for package symbols
|
|
592 |
*/
|
|
593 |
public static class PackageSymbol extends TypeSymbol
|
|
594 |
implements PackageElement {
|
|
595 |
|
|
596 |
public Scope members_field;
|
|
597 |
public Name fullname;
|
|
598 |
public ClassSymbol package_info; // see bug 6443073
|
|
599 |
|
|
600 |
public PackageSymbol(Name name, Type type, Symbol owner) {
|
|
601 |
super(0, name, type, owner);
|
|
602 |
this.kind = PCK;
|
|
603 |
this.members_field = null;
|
|
604 |
this.fullname = formFullName(name, owner);
|
|
605 |
}
|
|
606 |
|
|
607 |
public PackageSymbol(Name name, Symbol owner) {
|
|
608 |
this(name, null, owner);
|
|
609 |
this.type = new PackageType(this);
|
|
610 |
}
|
|
611 |
|
|
612 |
public String toString() {
|
|
613 |
return fullname.toString();
|
|
614 |
}
|
|
615 |
|
|
616 |
public Name getQualifiedName() {
|
|
617 |
return fullname;
|
|
618 |
}
|
|
619 |
|
|
620 |
public boolean isUnnamed() {
|
|
621 |
return name.isEmpty() && owner != null;
|
|
622 |
}
|
|
623 |
|
|
624 |
public Scope members() {
|
|
625 |
if (completer != null) complete();
|
|
626 |
return members_field;
|
|
627 |
}
|
|
628 |
|
|
629 |
public long flags() {
|
|
630 |
if (completer != null) complete();
|
|
631 |
return flags_field;
|
|
632 |
}
|
|
633 |
|
|
634 |
public List<Attribute.Compound> getAnnotationMirrors() {
|
|
635 |
if (completer != null) complete();
|
|
636 |
assert attributes_field != null;
|
|
637 |
return attributes_field;
|
|
638 |
}
|
|
639 |
|
|
640 |
/** A package "exists" if a type or package that exists has
|
|
641 |
* been seen within it.
|
|
642 |
*/
|
|
643 |
public boolean exists() {
|
|
644 |
return (flags_field & EXISTS) != 0;
|
|
645 |
}
|
|
646 |
|
|
647 |
public ElementKind getKind() {
|
|
648 |
return ElementKind.PACKAGE;
|
|
649 |
}
|
|
650 |
|
|
651 |
public Symbol getEnclosingElement() {
|
|
652 |
return null;
|
|
653 |
}
|
|
654 |
|
|
655 |
public <R, P> R accept(ElementVisitor<R, P> v, P p) {
|
|
656 |
return v.visitPackage(this, p);
|
|
657 |
}
|
|
658 |
}
|
|
659 |
|
|
660 |
/** A class for class symbols
|
|
661 |
*/
|
|
662 |
public static class ClassSymbol extends TypeSymbol implements TypeElement {
|
|
663 |
|
|
664 |
/** a scope for all class members; variables, methods and inner classes
|
|
665 |
* type parameters are not part of this scope
|
|
666 |
*/
|
|
667 |
public Scope members_field;
|
|
668 |
|
|
669 |
/** the fully qualified name of the class, i.e. pck.outer.inner.
|
|
670 |
* null for anonymous classes
|
|
671 |
*/
|
|
672 |
public Name fullname;
|
|
673 |
|
|
674 |
/** the fully qualified name of the class after converting to flat
|
|
675 |
* representation, i.e. pck.outer$inner,
|
|
676 |
* set externally for local and anonymous classes
|
|
677 |
*/
|
|
678 |
public Name flatname;
|
|
679 |
|
|
680 |
/** the sourcefile where the class came from
|
|
681 |
*/
|
|
682 |
public JavaFileObject sourcefile;
|
|
683 |
|
|
684 |
/** the classfile from where to load this class
|
|
685 |
* this will have extension .class or .java
|
|
686 |
*/
|
|
687 |
public JavaFileObject classfile;
|
|
688 |
|
|
689 |
/** the constant pool of the class
|
|
690 |
*/
|
|
691 |
public Pool pool;
|
|
692 |
|
|
693 |
public ClassSymbol(long flags, Name name, Type type, Symbol owner) {
|
|
694 |
super(flags, name, type, owner);
|
|
695 |
this.members_field = null;
|
|
696 |
this.fullname = formFullName(name, owner);
|
|
697 |
this.flatname = formFlatName(name, owner);
|
|
698 |
this.sourcefile = null;
|
|
699 |
this.classfile = null;
|
|
700 |
this.pool = null;
|
|
701 |
}
|
|
702 |
|
|
703 |
public ClassSymbol(long flags, Name name, Symbol owner) {
|
|
704 |
this(
|
|
705 |
flags,
|
|
706 |
name,
|
|
707 |
new ClassType(Type.noType, null, null),
|
|
708 |
owner);
|
|
709 |
this.type.tsym = this;
|
|
710 |
}
|
|
711 |
|
|
712 |
/** The Java source which this symbol represents.
|
|
713 |
*/
|
|
714 |
public String toString() {
|
|
715 |
return className();
|
|
716 |
}
|
|
717 |
|
|
718 |
public long flags() {
|
|
719 |
if (completer != null) complete();
|
|
720 |
return flags_field;
|
|
721 |
}
|
|
722 |
|
|
723 |
public Scope members() {
|
|
724 |
if (completer != null) complete();
|
|
725 |
return members_field;
|
|
726 |
}
|
|
727 |
|
|
728 |
public List<Attribute.Compound> getAnnotationMirrors() {
|
|
729 |
if (completer != null) complete();
|
|
730 |
assert attributes_field != null;
|
|
731 |
return attributes_field;
|
|
732 |
}
|
|
733 |
|
|
734 |
public Type erasure(Types types) {
|
|
735 |
if (erasure_field == null)
|
|
736 |
erasure_field = new ClassType(types.erasure(type.getEnclosingType()),
|
|
737 |
List.<Type>nil(), this);
|
|
738 |
return erasure_field;
|
|
739 |
}
|
|
740 |
|
|
741 |
public String className() {
|
|
742 |
if (name.len == 0)
|
|
743 |
return
|
|
744 |
Log.getLocalizedString("anonymous.class", flatname);
|
|
745 |
else
|
|
746 |
return fullname.toString();
|
|
747 |
}
|
|
748 |
|
|
749 |
public Name getQualifiedName() {
|
|
750 |
return fullname;
|
|
751 |
}
|
|
752 |
|
|
753 |
public Name flatName() {
|
|
754 |
return flatname;
|
|
755 |
}
|
|
756 |
|
|
757 |
public boolean isSubClass(Symbol base, Types types) {
|
|
758 |
if (this == base) {
|
|
759 |
return true;
|
|
760 |
} else if ((base.flags() & INTERFACE) != 0) {
|
|
761 |
for (Type t = type; t.tag == CLASS; t = types.supertype(t))
|
|
762 |
for (List<Type> is = types.interfaces(t);
|
|
763 |
is.nonEmpty();
|
|
764 |
is = is.tail)
|
|
765 |
if (is.head.tsym.isSubClass(base, types)) return true;
|
|
766 |
} else {
|
|
767 |
for (Type t = type; t.tag == CLASS; t = types.supertype(t))
|
|
768 |
if (t.tsym == base) return true;
|
|
769 |
}
|
|
770 |
return false;
|
|
771 |
}
|
|
772 |
|
|
773 |
/** Complete the elaboration of this symbol's definition.
|
|
774 |
*/
|
|
775 |
public void complete() throws CompletionFailure {
|
|
776 |
try {
|
|
777 |
super.complete();
|
|
778 |
} catch (CompletionFailure ex) {
|
|
779 |
// quiet error recovery
|
|
780 |
flags_field |= (PUBLIC|STATIC);
|
|
781 |
this.type = new ErrorType(this);
|
|
782 |
throw ex;
|
|
783 |
}
|
|
784 |
}
|
|
785 |
|
|
786 |
public List<Type> getInterfaces() {
|
|
787 |
complete();
|
|
788 |
if (type instanceof ClassType) {
|
|
789 |
ClassType t = (ClassType)type;
|
|
790 |
if (t.interfaces_field == null) // FIXME: shouldn't be null
|
|
791 |
t.interfaces_field = List.nil();
|
|
792 |
return t.interfaces_field;
|
|
793 |
} else {
|
|
794 |
return List.nil();
|
|
795 |
}
|
|
796 |
}
|
|
797 |
|
|
798 |
public Type getSuperclass() {
|
|
799 |
complete();
|
|
800 |
if (type instanceof ClassType) {
|
|
801 |
ClassType t = (ClassType)type;
|
|
802 |
if (t.supertype_field == null) // FIXME: shouldn't be null
|
|
803 |
t.supertype_field = Type.noType;
|
|
804 |
// An interface has no superclass; its supertype is Object.
|
|
805 |
return t.isInterface()
|
|
806 |
? Type.noType
|
|
807 |
: t.supertype_field;
|
|
808 |
} else {
|
|
809 |
return Type.noType;
|
|
810 |
}
|
|
811 |
}
|
|
812 |
|
|
813 |
public ElementKind getKind() {
|
|
814 |
long flags = flags();
|
|
815 |
if ((flags & ANNOTATION) != 0)
|
|
816 |
return ElementKind.ANNOTATION_TYPE;
|
|
817 |
else if ((flags & INTERFACE) != 0)
|
|
818 |
return ElementKind.INTERFACE;
|
|
819 |
else if ((flags & ENUM) != 0)
|
|
820 |
return ElementKind.ENUM;
|
|
821 |
else
|
|
822 |
return ElementKind.CLASS;
|
|
823 |
}
|
|
824 |
|
|
825 |
public NestingKind getNestingKind() {
|
|
826 |
complete();
|
|
827 |
if (owner.kind == PCK)
|
|
828 |
return NestingKind.TOP_LEVEL;
|
|
829 |
else if (name.isEmpty())
|
|
830 |
return NestingKind.ANONYMOUS;
|
|
831 |
else if (owner.kind == MTH)
|
|
832 |
return NestingKind.LOCAL;
|
|
833 |
else
|
|
834 |
return NestingKind.MEMBER;
|
|
835 |
}
|
|
836 |
|
|
837 |
/**
|
|
838 |
* @deprecated this method should never be used by javac internally.
|
|
839 |
*/
|
|
840 |
@Override @Deprecated
|
|
841 |
public <A extends java.lang.annotation.Annotation> A getAnnotation(Class<A> annoType) {
|
|
842 |
return JavacElements.getAnnotation(this, annoType);
|
|
843 |
}
|
|
844 |
|
|
845 |
public <R, P> R accept(ElementVisitor<R, P> v, P p) {
|
|
846 |
return v.visitType(this, p);
|
|
847 |
}
|
|
848 |
}
|
|
849 |
|
|
850 |
|
|
851 |
/** A class for variable symbols
|
|
852 |
*/
|
|
853 |
public static class VarSymbol extends Symbol implements VariableElement {
|
|
854 |
|
|
855 |
/** The variable's declaration position.
|
|
856 |
*/
|
|
857 |
public int pos = Position.NOPOS;
|
|
858 |
|
|
859 |
/** The variable's address. Used for different purposes during
|
|
860 |
* flow analysis, translation and code generation.
|
|
861 |
* Flow analysis:
|
|
862 |
* If this is a blank final or local variable, its sequence number.
|
|
863 |
* Translation:
|
|
864 |
* If this is a private field, its access number.
|
|
865 |
* Code generation:
|
|
866 |
* If this is a local variable, its logical slot number.
|
|
867 |
*/
|
|
868 |
public int adr = -1;
|
|
869 |
|
|
870 |
/** Construct a variable symbol, given its flags, name, type and owner.
|
|
871 |
*/
|
|
872 |
public VarSymbol(long flags, Name name, Type type, Symbol owner) {
|
|
873 |
super(VAR, flags, name, type, owner);
|
|
874 |
}
|
|
875 |
|
|
876 |
/** Clone this symbol with new owner.
|
|
877 |
*/
|
|
878 |
public VarSymbol clone(Symbol newOwner) {
|
|
879 |
VarSymbol v = new VarSymbol(flags_field, name, type, newOwner);
|
|
880 |
v.pos = pos;
|
|
881 |
v.adr = adr;
|
|
882 |
v.data = data;
|
|
883 |
// System.out.println("clone " + v + " in " + newOwner);//DEBUG
|
|
884 |
return v;
|
|
885 |
}
|
|
886 |
|
|
887 |
public String toString() {
|
|
888 |
return name.toString();
|
|
889 |
}
|
|
890 |
|
|
891 |
public Symbol asMemberOf(Type site, Types types) {
|
|
892 |
return new VarSymbol(flags_field, name, types.memberType(site, this), owner);
|
|
893 |
}
|
|
894 |
|
|
895 |
public ElementKind getKind() {
|
|
896 |
long flags = flags();
|
|
897 |
if ((flags & PARAMETER) != 0) {
|
|
898 |
if (isExceptionParameter())
|
|
899 |
return ElementKind.EXCEPTION_PARAMETER;
|
|
900 |
else
|
|
901 |
return ElementKind.PARAMETER;
|
|
902 |
} else if ((flags & ENUM) != 0) {
|
|
903 |
return ElementKind.ENUM_CONSTANT;
|
|
904 |
} else if (owner.kind == TYP || owner.kind == ERR) {
|
|
905 |
return ElementKind.FIELD;
|
|
906 |
} else {
|
|
907 |
return ElementKind.LOCAL_VARIABLE;
|
|
908 |
}
|
|
909 |
}
|
|
910 |
|
|
911 |
public <R, P> R accept(ElementVisitor<R, P> v, P p) {
|
|
912 |
return v.visitVariable(this, p);
|
|
913 |
}
|
|
914 |
|
|
915 |
public Object getConstantValue() { // Mirror API
|
|
916 |
return Constants.decode(getConstValue(), type);
|
|
917 |
}
|
|
918 |
|
|
919 |
public void setLazyConstValue(final Env<AttrContext> env,
|
|
920 |
final Log log,
|
|
921 |
final Attr attr,
|
|
922 |
final JCTree.JCExpression initializer)
|
|
923 |
{
|
|
924 |
setData(new Callable<Object>() {
|
|
925 |
public Object call() {
|
|
926 |
JavaFileObject source = log.useSource(env.toplevel.sourcefile);
|
|
927 |
try {
|
|
928 |
// In order to catch self-references, we set
|
|
929 |
// the variable's declaration position to
|
|
930 |
// maximal possible value, effectively marking
|
|
931 |
// the variable as undefined.
|
|
932 |
int pos = VarSymbol.this.pos;
|
|
933 |
VarSymbol.this.pos = Position.MAXPOS;
|
|
934 |
Type itype = attr.attribExpr(initializer, env, type);
|
|
935 |
VarSymbol.this.pos = pos;
|
|
936 |
if (itype.constValue() != null)
|
|
937 |
return attr.coerce(itype, type).constValue();
|
|
938 |
else
|
|
939 |
return null;
|
|
940 |
} finally {
|
|
941 |
log.useSource(source);
|
|
942 |
}
|
|
943 |
}
|
|
944 |
});
|
|
945 |
}
|
|
946 |
|
|
947 |
/**
|
|
948 |
* The variable's constant value, if this is a constant.
|
|
949 |
* Before the constant value is evaluated, it points to an
|
|
950 |
* initalizer environment. If this is not a constant, it can
|
|
951 |
* be used for other stuff.
|
|
952 |
*/
|
|
953 |
private Object data;
|
|
954 |
|
|
955 |
public boolean isExceptionParameter() {
|
|
956 |
return data == ElementKind.EXCEPTION_PARAMETER;
|
|
957 |
}
|
|
958 |
|
|
959 |
public Object getConstValue() {
|
|
960 |
// TODO: Consider if getConstValue and getConstantValue can be collapsed
|
|
961 |
if (data == ElementKind.EXCEPTION_PARAMETER) {
|
|
962 |
return null;
|
|
963 |
} else if (data instanceof Callable<?>) {
|
|
964 |
// In this case, this is final a variable, with an as
|
|
965 |
// yet unevaluated initializer.
|
|
966 |
Callable<?> eval = (Callable<?>)data;
|
|
967 |
data = null; // to make sure we don't evaluate this twice.
|
|
968 |
try {
|
|
969 |
data = eval.call();
|
|
970 |
} catch (Exception ex) {
|
|
971 |
throw new AssertionError(ex);
|
|
972 |
}
|
|
973 |
}
|
|
974 |
return data;
|
|
975 |
}
|
|
976 |
|
|
977 |
public void setData(Object data) {
|
|
978 |
assert !(data instanceof Env<?>) : this;
|
|
979 |
this.data = data;
|
|
980 |
}
|
|
981 |
}
|
|
982 |
|
|
983 |
/** A class for method symbols.
|
|
984 |
*/
|
|
985 |
public static class MethodSymbol extends Symbol implements ExecutableElement {
|
|
986 |
|
|
987 |
/** The code of the method. */
|
|
988 |
public Code code = null;
|
|
989 |
|
|
990 |
/** The parameters of the method. */
|
|
991 |
public List<VarSymbol> params = null;
|
|
992 |
|
|
993 |
/** The names of the parameters */
|
|
994 |
public List<Name> savedParameterNames;
|
|
995 |
|
|
996 |
/** For an attribute field accessor, its default value if any.
|
|
997 |
* The value is null if none appeared in the method
|
|
998 |
* declaration.
|
|
999 |
*/
|
|
1000 |
public Attribute defaultValue = null;
|
|
1001 |
|
|
1002 |
/** Construct a method symbol, given its flags, name, type and owner.
|
|
1003 |
*/
|
|
1004 |
public MethodSymbol(long flags, Name name, Type type, Symbol owner) {
|
|
1005 |
super(MTH, flags, name, type, owner);
|
|
1006 |
assert owner.type.tag != TYPEVAR : owner + "." + name;
|
|
1007 |
}
|
|
1008 |
|
|
1009 |
/** Clone this symbol with new owner.
|
|
1010 |
*/
|
|
1011 |
public MethodSymbol clone(Symbol newOwner) {
|
|
1012 |
MethodSymbol m = new MethodSymbol(flags_field, name, type, newOwner);
|
|
1013 |
m.code = code;
|
|
1014 |
return m;
|
|
1015 |
}
|
|
1016 |
|
|
1017 |
/** The Java source which this symbol represents.
|
|
1018 |
*/
|
|
1019 |
public String toString() {
|
|
1020 |
if ((flags() & BLOCK) != 0) {
|
|
1021 |
return owner.name.toString();
|
|
1022 |
} else {
|
|
1023 |
String s = (name == name.table.init)
|
|
1024 |
? owner.name.toString()
|
|
1025 |
: name.toString();
|
|
1026 |
if (type != null) {
|
|
1027 |
if (type.tag == FORALL)
|
|
1028 |
s = "<" + ((ForAll)type).getTypeArguments() + ">" + s;
|
|
1029 |
s += "(" + type.argtypes((flags() & VARARGS) != 0) + ")";
|
|
1030 |
}
|
|
1031 |
return s;
|
|
1032 |
}
|
|
1033 |
}
|
|
1034 |
|
|
1035 |
/** find a symbol that this (proxy method) symbol implements.
|
|
1036 |
* @param c The class whose members are searched for
|
|
1037 |
* implementations
|
|
1038 |
*/
|
|
1039 |
public Symbol implemented(TypeSymbol c, Types types) {
|
|
1040 |
Symbol impl = null;
|
|
1041 |
for (List<Type> is = types.interfaces(c.type);
|
|
1042 |
impl == null && is.nonEmpty();
|
|
1043 |
is = is.tail) {
|
|
1044 |
TypeSymbol i = is.head.tsym;
|
|
1045 |
for (Scope.Entry e = i.members().lookup(name);
|
|
1046 |
impl == null && e.scope != null;
|
|
1047 |
e = e.next()) {
|
|
1048 |
if (this.overrides(e.sym, (TypeSymbol)owner, types, true) &&
|
|
1049 |
// FIXME: I suspect the following requires a
|
|
1050 |
// subst() for a parametric return type.
|
|
1051 |
types.isSameType(type.getReturnType(),
|
|
1052 |
types.memberType(owner.type, e.sym).getReturnType())) {
|
|
1053 |
impl = e.sym;
|
|
1054 |
}
|
|
1055 |
if (impl == null)
|
|
1056 |
impl = implemented(i, types);
|
|
1057 |
}
|
|
1058 |
}
|
|
1059 |
return impl;
|
|
1060 |
}
|
|
1061 |
|
|
1062 |
/** Will the erasure of this method be considered by the VM to
|
|
1063 |
* override the erasure of the other when seen from class `origin'?
|
|
1064 |
*/
|
|
1065 |
public boolean binaryOverrides(Symbol _other, TypeSymbol origin, Types types) {
|
|
1066 |
if (isConstructor() || _other.kind != MTH) return false;
|
|
1067 |
|
|
1068 |
if (this == _other) return true;
|
|
1069 |
MethodSymbol other = (MethodSymbol)_other;
|
|
1070 |
|
|
1071 |
// check for a direct implementation
|
|
1072 |
if (other.isOverridableIn((TypeSymbol)owner) &&
|
|
1073 |
types.asSuper(owner.type, other.owner) != null &&
|
|
1074 |
types.isSameType(erasure(types), other.erasure(types)))
|
|
1075 |
return true;
|
|
1076 |
|
|
1077 |
// check for an inherited implementation
|
|
1078 |
return
|
|
1079 |
(flags() & ABSTRACT) == 0 &&
|
|
1080 |
other.isOverridableIn(origin) &&
|
|
1081 |
this.isMemberOf(origin, types) &&
|
|
1082 |
types.isSameType(erasure(types), other.erasure(types));
|
|
1083 |
}
|
|
1084 |
|
|
1085 |
/** The implementation of this (abstract) symbol in class origin,
|
|
1086 |
* from the VM's point of view, null if method does not have an
|
|
1087 |
* implementation in class.
|
|
1088 |
* @param origin The class of which the implementation is a member.
|
|
1089 |
*/
|
|
1090 |
public MethodSymbol binaryImplementation(ClassSymbol origin, Types types) {
|
|
1091 |
for (TypeSymbol c = origin; c != null; c = types.supertype(c.type).tsym) {
|
|
1092 |
for (Scope.Entry e = c.members().lookup(name);
|
|
1093 |
e.scope != null;
|
|
1094 |
e = e.next()) {
|
|
1095 |
if (e.sym.kind == MTH &&
|
|
1096 |
((MethodSymbol)e.sym).binaryOverrides(this, origin, types))
|
|
1097 |
return (MethodSymbol)e.sym;
|
|
1098 |
}
|
|
1099 |
}
|
|
1100 |
return null;
|
|
1101 |
}
|
|
1102 |
|
|
1103 |
/** Does this symbol override `other' symbol, when both are seen as
|
|
1104 |
* members of class `origin'? It is assumed that _other is a member
|
|
1105 |
* of origin.
|
|
1106 |
*
|
|
1107 |
* It is assumed that both symbols have the same name. The static
|
|
1108 |
* modifier is ignored for this test.
|
|
1109 |
*
|
|
1110 |
* See JLS 8.4.6.1 (without transitivity) and 8.4.6.4
|
|
1111 |
*/
|
|
1112 |
public boolean overrides(Symbol _other, TypeSymbol origin, Types types, boolean checkResult) {
|
|
1113 |
if (isConstructor() || _other.kind != MTH) return false;
|
|
1114 |
|
|
1115 |
if (this == _other) return true;
|
|
1116 |
MethodSymbol other = (MethodSymbol)_other;
|
|
1117 |
|
|
1118 |
// check for a direct implementation
|
|
1119 |
if (other.isOverridableIn((TypeSymbol)owner) &&
|
|
1120 |
types.asSuper(owner.type, other.owner) != null) {
|
|
1121 |
Type mt = types.memberType(owner.type, this);
|
|
1122 |
Type ot = types.memberType(owner.type, other);
|
|
1123 |
if (types.isSubSignature(mt, ot)) {
|
|
1124 |
if (!checkResult)
|
|
1125 |
return true;
|
|
1126 |
if (types.returnTypeSubstitutable(mt, ot))
|
|
1127 |
return true;
|
|
1128 |
}
|
|
1129 |
}
|
|
1130 |
|
|
1131 |
// check for an inherited implementation
|
|
1132 |
if ((flags() & ABSTRACT) != 0 ||
|
|
1133 |
(other.flags() & ABSTRACT) == 0 ||
|
|
1134 |
!other.isOverridableIn(origin) ||
|
|
1135 |
!this.isMemberOf(origin, types))
|
|
1136 |
return false;
|
|
1137 |
|
|
1138 |
// assert types.asSuper(origin.type, other.owner) != null;
|
|
1139 |
Type mt = types.memberType(origin.type, this);
|
|
1140 |
Type ot = types.memberType(origin.type, other);
|
|
1141 |
return
|
|
1142 |
types.isSubSignature(mt, ot) &&
|
|
1143 |
(!checkResult || types.resultSubtype(mt, ot, Warner.noWarnings));
|
|
1144 |
}
|
|
1145 |
|
|
1146 |
private boolean isOverridableIn(TypeSymbol origin) {
|
|
1147 |
// JLS3 8.4.6.1
|
|
1148 |
switch ((int)(flags_field & Flags.AccessFlags)) {
|
|
1149 |
case Flags.PRIVATE:
|
|
1150 |
return false;
|
|
1151 |
case Flags.PUBLIC:
|
|
1152 |
return true;
|
|
1153 |
case Flags.PROTECTED:
|
|
1154 |
return (origin.flags() & INTERFACE) == 0;
|
|
1155 |
case 0:
|
|
1156 |
// for package private: can only override in the same
|
|
1157 |
// package
|
|
1158 |
return
|
|
1159 |
this.packge() == origin.packge() &&
|
|
1160 |
(origin.flags() & INTERFACE) == 0;
|
|
1161 |
default:
|
|
1162 |
return false;
|
|
1163 |
}
|
|
1164 |
}
|
|
1165 |
|
|
1166 |
/** The implementation of this (abstract) symbol in class origin;
|
|
1167 |
* null if none exists. Synthetic methods are not considered
|
|
1168 |
* as possible implementations.
|
|
1169 |
*/
|
|
1170 |
public MethodSymbol implementation(TypeSymbol origin, Types types, boolean checkResult) {
|
|
1171 |
for (Type t = origin.type; t.tag == CLASS; t = types.supertype(t)) {
|
|
1172 |
TypeSymbol c = t.tsym;
|
|
1173 |
for (Scope.Entry e = c.members().lookup(name);
|
|
1174 |
e.scope != null;
|
|
1175 |
e = e.next()) {
|
|
1176 |
if (e.sym.kind == MTH) {
|
|
1177 |
MethodSymbol m = (MethodSymbol) e.sym;
|
|
1178 |
if (m.overrides(this, origin, types, checkResult) &&
|
|
1179 |
(m.flags() & SYNTHETIC) == 0)
|
|
1180 |
return m;
|
|
1181 |
}
|
|
1182 |
}
|
|
1183 |
}
|
|
1184 |
// if origin is derived from a raw type, we might have missed
|
|
1185 |
// an implementation because we do not know enough about instantiations.
|
|
1186 |
// in this case continue with the supertype as origin.
|
|
1187 |
if (types.isDerivedRaw(origin.type))
|
|
1188 |
return implementation(types.supertype(origin.type).tsym, types, checkResult);
|
|
1189 |
else
|
|
1190 |
return null;
|
|
1191 |
}
|
|
1192 |
|
|
1193 |
public List<VarSymbol> params() {
|
|
1194 |
owner.complete();
|
|
1195 |
if (params == null) {
|
|
1196 |
List<Name> names = savedParameterNames;
|
|
1197 |
savedParameterNames = null;
|
|
1198 |
if (names == null) {
|
|
1199 |
names = List.nil();
|
|
1200 |
int i = 0;
|
|
1201 |
for (Type t : type.getParameterTypes())
|
|
1202 |
names = names.prepend(name.table.fromString("arg" + i++));
|
|
1203 |
names = names.reverse();
|
|
1204 |
}
|
|
1205 |
ListBuffer<VarSymbol> buf = new ListBuffer<VarSymbol>();
|
|
1206 |
for (Type t : type.getParameterTypes()) {
|
|
1207 |
buf.append(new VarSymbol(PARAMETER, names.head, t, this));
|
|
1208 |
names = names.tail;
|
|
1209 |
}
|
|
1210 |
params = buf.toList();
|
|
1211 |
}
|
|
1212 |
return params;
|
|
1213 |
}
|
|
1214 |
|
|
1215 |
public Symbol asMemberOf(Type site, Types types) {
|
|
1216 |
return new MethodSymbol(flags_field, name, types.memberType(site, this), owner);
|
|
1217 |
}
|
|
1218 |
|
|
1219 |
public ElementKind getKind() {
|
|
1220 |
if (name == name.table.init)
|
|
1221 |
return ElementKind.CONSTRUCTOR;
|
|
1222 |
else if (name == name.table.clinit)
|
|
1223 |
return ElementKind.STATIC_INIT;
|
|
1224 |
else
|
|
1225 |
return ElementKind.METHOD;
|
|
1226 |
}
|
|
1227 |
|
|
1228 |
public Attribute getDefaultValue() {
|
|
1229 |
return defaultValue;
|
|
1230 |
}
|
|
1231 |
|
|
1232 |
public List<VarSymbol> getParameters() {
|
|
1233 |
return params();
|
|
1234 |
}
|
|
1235 |
|
|
1236 |
public boolean isVarArgs() {
|
|
1237 |
return (flags() & VARARGS) != 0;
|
|
1238 |
}
|
|
1239 |
|
|
1240 |
public <R, P> R accept(ElementVisitor<R, P> v, P p) {
|
|
1241 |
return v.visitExecutable(this, p);
|
|
1242 |
}
|
|
1243 |
|
|
1244 |
public Type getReturnType() {
|
|
1245 |
return asType().getReturnType();
|
|
1246 |
}
|
|
1247 |
|
|
1248 |
public List<Type> getThrownTypes() {
|
|
1249 |
return asType().getThrownTypes();
|
|
1250 |
}
|
|
1251 |
}
|
|
1252 |
|
|
1253 |
/** A class for predefined operators.
|
|
1254 |
*/
|
|
1255 |
public static class OperatorSymbol extends MethodSymbol {
|
|
1256 |
|
|
1257 |
public int opcode;
|
|
1258 |
|
|
1259 |
public OperatorSymbol(Name name, Type type, int opcode, Symbol owner) {
|
|
1260 |
super(PUBLIC | STATIC, name, type, owner);
|
|
1261 |
this.opcode = opcode;
|
|
1262 |
}
|
|
1263 |
}
|
|
1264 |
|
|
1265 |
/** Symbol completer interface.
|
|
1266 |
*/
|
|
1267 |
public static interface Completer {
|
|
1268 |
void complete(Symbol sym) throws CompletionFailure;
|
|
1269 |
}
|
|
1270 |
|
|
1271 |
public static class CompletionFailure extends RuntimeException {
|
|
1272 |
private static final long serialVersionUID = 0;
|
|
1273 |
public Symbol sym;
|
|
1274 |
|
|
1275 |
/** A localized string describing the failure.
|
|
1276 |
*/
|
|
1277 |
public String errmsg;
|
|
1278 |
|
|
1279 |
public CompletionFailure(Symbol sym, String errmsg) {
|
|
1280 |
this.sym = sym;
|
|
1281 |
this.errmsg = errmsg;
|
|
1282 |
// this.printStackTrace();//DEBUG
|
|
1283 |
}
|
|
1284 |
|
|
1285 |
public String getMessage() {
|
|
1286 |
return errmsg;
|
|
1287 |
}
|
|
1288 |
|
|
1289 |
@Override
|
|
1290 |
public CompletionFailure initCause(Throwable cause) {
|
|
1291 |
super.initCause(cause);
|
|
1292 |
return this;
|
|
1293 |
}
|
|
1294 |
|
|
1295 |
}
|
|
1296 |
}
|