/*
* Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.sun.tools.javac.api;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.AnnotationMirror;
import javax.lang.model.element.AnnotationValue;
import javax.lang.model.element.Element;
import javax.lang.model.element.ElementKind;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.TypeElement;
import javax.lang.model.type.DeclaredType;
import javax.lang.model.type.TypeKind;
import javax.lang.model.type.TypeMirror;
import javax.tools.Diagnostic;
import javax.tools.JavaCompiler;
import javax.tools.JavaFileObject;
import com.sun.source.doctree.DocCommentTree;
import com.sun.source.doctree.DocTree;
import com.sun.source.tree.CatchTree;
import com.sun.source.tree.CompilationUnitTree;
import com.sun.source.tree.Scope;
import com.sun.source.tree.Tree;
import com.sun.source.util.DocSourcePositions;
import com.sun.source.util.DocTreePath;
import com.sun.source.util.DocTreeScanner;
import com.sun.source.util.DocTrees;
import com.sun.source.util.JavacTask;
import com.sun.source.util.TreePath;
import com.sun.tools.javac.code.Flags;
import com.sun.tools.javac.code.Kinds;
import com.sun.tools.javac.code.Symbol;
import com.sun.tools.javac.code.Symbol.ClassSymbol;
import com.sun.tools.javac.code.Symbol.MethodSymbol;
import com.sun.tools.javac.code.Symbol.PackageSymbol;
import com.sun.tools.javac.code.Symbol.TypeSymbol;
import com.sun.tools.javac.code.Symbol.VarSymbol;
import com.sun.tools.javac.code.Type;
import com.sun.tools.javac.code.Type.ArrayType;
import com.sun.tools.javac.code.Type.ClassType;
import com.sun.tools.javac.code.Type.ErrorType;
import com.sun.tools.javac.code.Type.UnionClassType;
import com.sun.tools.javac.code.Types;
import com.sun.tools.javac.code.Types.TypeRelation;
import com.sun.tools.javac.comp.Attr;
import com.sun.tools.javac.comp.AttrContext;
import com.sun.tools.javac.comp.Enter;
import com.sun.tools.javac.comp.Env;
import com.sun.tools.javac.comp.MemberEnter;
import com.sun.tools.javac.comp.Resolve;
import com.sun.tools.javac.model.JavacElements;
import com.sun.tools.javac.processing.JavacProcessingEnvironment;
import com.sun.tools.javac.tree.DCTree;
import com.sun.tools.javac.tree.DCTree.DCBlockTag;
import com.sun.tools.javac.tree.DCTree.DCDocComment;
import com.sun.tools.javac.tree.DCTree.DCEndPosTree;
import com.sun.tools.javac.tree.DCTree.DCErroneous;
import com.sun.tools.javac.tree.DCTree.DCIdentifier;
import com.sun.tools.javac.tree.DCTree.DCParam;
import com.sun.tools.javac.tree.DCTree.DCReference;
import com.sun.tools.javac.tree.DCTree.DCText;
import com.sun.tools.javac.tree.EndPosTable;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.*;
import com.sun.tools.javac.tree.TreeCopier;
import com.sun.tools.javac.tree.TreeInfo;
import com.sun.tools.javac.tree.TreeMaker;
import com.sun.tools.javac.util.Abort;
import com.sun.tools.javac.util.Assert;
import com.sun.tools.javac.util.Context;
import com.sun.tools.javac.util.JCDiagnostic;
import com.sun.tools.javac.util.List;
import com.sun.tools.javac.util.ListBuffer;
import com.sun.tools.javac.util.Log;
import com.sun.tools.javac.util.Name;
import com.sun.tools.javac.util.Names;
import com.sun.tools.javac.util.Pair;
import com.sun.tools.javac.util.Position;
import static com.sun.tools.javac.code.TypeTag.*;
/**
* Provides an implementation of Trees.
*
* <p><b>This is NOT part of any supported API.
* If you write code that depends on this, you do so at your own
* risk. This code and its internal interfaces are subject to change
* or deletion without notice.</b></p>
*
* @author Peter von der Ahé
*/
public class JavacTrees extends DocTrees {
// in a world of a single context per compilation, these would all be final
private Resolve resolve;
private Enter enter;
private Log log;
private MemberEnter memberEnter;
private Attr attr;
private TreeMaker treeMaker;
private JavacElements elements;
private JavacTaskImpl javacTaskImpl;
private Names names;
private Types types;
// called reflectively from Trees.instance(CompilationTask task)
public static JavacTrees instance(JavaCompiler.CompilationTask task) {
if (!(task instanceof BasicJavacTask))
throw new IllegalArgumentException();
return instance(((BasicJavacTask)task).getContext());
}
// called reflectively from Trees.instance(ProcessingEnvironment env)
public static JavacTrees instance(ProcessingEnvironment env) {
if (!(env instanceof JavacProcessingEnvironment))
throw new IllegalArgumentException();
return instance(((JavacProcessingEnvironment)env).getContext());
}
public static JavacTrees instance(Context context) {
JavacTrees instance = context.get(JavacTrees.class);
if (instance == null)
instance = new JavacTrees(context);
return instance;
}
protected JavacTrees(Context context) {
context.put(JavacTrees.class, this);
init(context);
}
public void updateContext(Context context) {
init(context);
}
private void init(Context context) {
attr = Attr.instance(context);
enter = Enter.instance(context);
elements = JavacElements.instance(context);
log = Log.instance(context);
resolve = Resolve.instance(context);
treeMaker = TreeMaker.instance(context);
memberEnter = MemberEnter.instance(context);
names = Names.instance(context);
types = Types.instance(context);
JavacTask t = context.get(JavacTask.class);
if (t instanceof JavacTaskImpl)
javacTaskImpl = (JavacTaskImpl) t;
}
public DocSourcePositions getSourcePositions() {
return new DocSourcePositions() {
public long getStartPosition(CompilationUnitTree file, Tree tree) {
return TreeInfo.getStartPos((JCTree) tree);
}
public long getEndPosition(CompilationUnitTree file, Tree tree) {
EndPosTable endPosTable = ((JCCompilationUnit) file).endPositions;
return TreeInfo.getEndPos((JCTree) tree, endPosTable);
}
public long getStartPosition(CompilationUnitTree file, DocCommentTree comment, DocTree tree) {
return ((DCTree) tree).getSourcePosition((DCDocComment) comment);
}
@SuppressWarnings("fallthrough")
public long getEndPosition(CompilationUnitTree file, DocCommentTree comment, DocTree tree) {
DCDocComment dcComment = (DCDocComment) comment;
if (tree instanceof DCEndPosTree) {
int endPos = ((DCEndPosTree) tree).getEndPos(dcComment);
if (endPos != Position.NOPOS) {
return endPos;
}
}
int correction = 0;
switch (tree.getKind()) {
case TEXT:
DCText text = (DCText) tree;
return dcComment.comment.getSourcePos(text.pos + text.text.length());
case ERRONEOUS:
DCErroneous err = (DCErroneous) tree;
return dcComment.comment.getSourcePos(err.pos + err.body.length());
case IDENTIFIER:
DCIdentifier ident = (DCIdentifier) tree;
return dcComment.comment.getSourcePos(ident.pos + (ident.name != names.error ? ident.name.length() : 0));
case PARAM:
DCParam param = (DCParam) tree;
if (param.isTypeParameter && param.getDescription().isEmpty()) {
correction = 1;
}
case AUTHOR: case DEPRECATED: case RETURN: case SEE:
case SERIAL: case SERIAL_DATA: case SERIAL_FIELD: case SINCE:
case THROWS: case UNKNOWN_BLOCK_TAG: case VERSION: {
DocTree last = getLastChild(tree);
if (last != null) {
return getEndPosition(file, comment, last) + correction;
}
DCBlockTag block = (DCBlockTag) tree;
return dcComment.comment.getSourcePos(block.pos + block.getTagName().length() + 1);
}
default:
DocTree last = getLastChild(tree);
if (last != null) {
return getEndPosition(file, comment, last);
}
break;
}
return Position.NOPOS;
}
};
}
private DocTree getLastChild(DocTree tree) {
final DocTree[] last = new DocTree[] {null};
tree.accept(new DocTreeScanner<Void, Void>() {
@Override public Void scan(DocTree node, Void p) {
if (node != null) last[0] = node;
return null;
}
}, null);
return last[0];
}
public JCClassDecl getTree(TypeElement element) {
return (JCClassDecl) getTree((Element) element);
}
public JCMethodDecl getTree(ExecutableElement method) {
return (JCMethodDecl) getTree((Element) method);
}
public JCTree getTree(Element element) {
Symbol symbol = (Symbol) element;
TypeSymbol enclosing = symbol.enclClass();
Env<AttrContext> env = enter.getEnv(enclosing);
if (env == null)
return null;
JCClassDecl classNode = env.enclClass;
if (classNode != null) {
if (TreeInfo.symbolFor(classNode) == element)
return classNode;
for (JCTree node : classNode.getMembers())
if (TreeInfo.symbolFor(node) == element)
return node;
}
return null;
}
public JCTree getTree(Element e, AnnotationMirror a) {
return getTree(e, a, null);
}
public JCTree getTree(Element e, AnnotationMirror a, AnnotationValue v) {
Pair<JCTree, JCCompilationUnit> treeTopLevel = elements.getTreeAndTopLevel(e, a, v);
if (treeTopLevel == null)
return null;
return treeTopLevel.fst;
}
public TreePath getPath(CompilationUnitTree unit, Tree node) {
return TreePath.getPath(unit, node);
}
public TreePath getPath(Element e) {
return getPath(e, null, null);
}
public TreePath getPath(Element e, AnnotationMirror a) {
return getPath(e, a, null);
}
public TreePath getPath(Element e, AnnotationMirror a, AnnotationValue v) {
final Pair<JCTree, JCCompilationUnit> treeTopLevel = elements.getTreeAndTopLevel(e, a, v);
if (treeTopLevel == null)
return null;
return TreePath.getPath(treeTopLevel.snd, treeTopLevel.fst);
}
public Symbol getElement(TreePath path) {
JCTree tree = (JCTree) path.getLeaf();
Symbol sym = TreeInfo.symbolFor(tree);
if (sym == null) {
if (TreeInfo.isDeclaration(tree)) {
for (TreePath p = path; p != null; p = p.getParentPath()) {
JCTree t = (JCTree) p.getLeaf();
if (t.hasTag(JCTree.Tag.CLASSDEF)) {
JCClassDecl ct = (JCClassDecl) t;
if (ct.sym != null) {
if ((ct.sym.flags_field & Flags.UNATTRIBUTED) != 0) {
attr.attribClass(ct.pos(), ct.sym);
sym = TreeInfo.symbolFor(tree);
}
break;
}
}
}
}
}
return sym;
}
@Override
public Element getElement(DocTreePath path) {
DocTree forTree = path.getLeaf();
if (forTree instanceof DCReference)
return attributeDocReference(path.getTreePath(), ((DCReference) forTree));
if (forTree instanceof DCIdentifier) {
if (path.getParentPath().getLeaf() instanceof DCParam) {
return attributeParamIdentifier(path.getTreePath(), (DCParam) path.getParentPath().getLeaf());
}
}
return null;
}
private Symbol attributeDocReference(TreePath path, DCReference ref) {
Env<AttrContext> env = getAttrContext(path);
Log.DeferredDiagnosticHandler deferredDiagnosticHandler =
new Log.DeferredDiagnosticHandler(log);
try {
final TypeSymbol tsym;
final Name memberName;
if (ref.qualifierExpression == null) {
tsym = env.enclClass.sym;
memberName = ref.memberName;
} else {
// See if the qualifierExpression is a type or package name.
// javac does not provide the exact method required, so
// we first check if qualifierExpression identifies a type,
// and if not, then we check to see if it identifies a package.
Type t = attr.attribType(ref.qualifierExpression, env);
if (t.isErroneous()) {
if (ref.memberName == null) {
// Attr/Resolve assume packages exist and create symbols as needed
// so use getPackageElement to restrict search to existing packages
PackageSymbol pck = elements.getPackageElement(ref.qualifierExpression.toString());
if (pck != null) {
return pck;
} else if (ref.qualifierExpression.hasTag(JCTree.Tag.IDENT)) {
// fixup: allow "identifier" instead of "#identifier"
// for compatibility with javadoc
tsym = env.enclClass.sym;
memberName = ((JCIdent) ref.qualifierExpression).name;
} else
return null;
} else {
return null;
}
} else {
tsym = t.tsym;
memberName = ref.memberName;
}
}
if (memberName == null)
return tsym;
final List<Type> paramTypes;
if (ref.paramTypes == null)
paramTypes = null;
else {
ListBuffer<Type> lb = new ListBuffer<>();
for (List<JCTree> l = ref.paramTypes; l.nonEmpty(); l = l.tail) {
JCTree tree = l.head;
Type t = attr.attribType(tree, env);
lb.add(t);
}
paramTypes = lb.toList();
}
ClassSymbol sym = (ClassSymbol) types.upperBound(tsym.type).tsym;
Symbol msym = (memberName == sym.name)
? findConstructor(sym, paramTypes)
: findMethod(sym, memberName, paramTypes);
if (paramTypes != null) {
// explicit (possibly empty) arg list given, so cannot be a field
return msym;
}
VarSymbol vsym = (ref.paramTypes != null) ? null : findField(sym, memberName);
// prefer a field over a method with no parameters
if (vsym != null &&
(msym == null ||
types.isSubtypeUnchecked(vsym.enclClass().asType(), msym.enclClass().asType()))) {
return vsym;
} else {
return msym;
}
} catch (Abort e) { // may be thrown by Check.completionError in case of bad class file
return null;
} finally {
log.popDiagnosticHandler(deferredDiagnosticHandler);
}
}
private Symbol attributeParamIdentifier(TreePath path, DCParam ptag) {
Symbol javadocSymbol = getElement(path);
if (javadocSymbol == null)
return null;
ElementKind kind = javadocSymbol.getKind();
List<? extends Symbol> params = List.nil();
if (kind == ElementKind.METHOD || kind == ElementKind.CONSTRUCTOR) {
MethodSymbol ee = (MethodSymbol) javadocSymbol;
params = ptag.isTypeParameter()
? ee.getTypeParameters()
: ee.getParameters();
} else if (kind.isClass() || kind.isInterface()) {
ClassSymbol te = (ClassSymbol) javadocSymbol;
params = te.getTypeParameters();
}
for (Symbol param : params) {
if (param.getSimpleName() == ptag.getName().getName()) {
return param;
}
}
return null;
}
/** @see com.sun.tools.javadoc.ClassDocImpl#findField */
private VarSymbol findField(ClassSymbol tsym, Name fieldName) {
return searchField(tsym, fieldName, new HashSet<>());
}
/** @see com.sun.tools.javadoc.ClassDocImpl#searchField */
private VarSymbol searchField(ClassSymbol tsym, Name fieldName, Set<ClassSymbol> searched) {
if (searched.contains(tsym)) {
return null;
}
searched.add(tsym);
for (com.sun.tools.javac.code.Scope.Entry e = tsym.members().lookup(fieldName);
e.scope != null; e = e.next()) {
if (e.sym.kind == Kinds.VAR) {
return (VarSymbol)e.sym;
}
}
//### If we found a VarSymbol above, but which did not pass
//### the modifier filter, we should return failure here!
ClassSymbol encl = tsym.owner.enclClass();
if (encl != null) {
VarSymbol vsym = searchField(encl, fieldName, searched);
if (vsym != null) {
return vsym;
}
}
// search superclass
Type superclass = tsym.getSuperclass();
if (superclass.tsym != null) {
VarSymbol vsym = searchField((ClassSymbol) superclass.tsym, fieldName, searched);
if (vsym != null) {
return vsym;
}
}
// search interfaces
List<Type> intfs = tsym.getInterfaces();
for (List<Type> l = intfs; l.nonEmpty(); l = l.tail) {
Type intf = l.head;
if (intf.isErroneous()) continue;
VarSymbol vsym = searchField((ClassSymbol) intf.tsym, fieldName, searched);
if (vsym != null) {
return vsym;
}
}
return null;
}
/** @see com.sun.tools.javadoc.ClassDocImpl#findConstructor */
MethodSymbol findConstructor(ClassSymbol tsym, List<Type> paramTypes) {
for (com.sun.tools.javac.code.Scope.Entry e = tsym.members().lookup(names.init);
e.scope != null; e = e.next()) {
if (e.sym.kind == Kinds.MTH) {
if (hasParameterTypes((MethodSymbol) e.sym, paramTypes)) {
return (MethodSymbol) e.sym;
}
}
}
return null;
}
/** @see com.sun.tools.javadoc.ClassDocImpl#findMethod */
private MethodSymbol findMethod(ClassSymbol tsym, Name methodName, List<Type> paramTypes) {
return searchMethod(tsym, methodName, paramTypes, new HashSet<>());
}
/** @see com.sun.tools.javadoc.ClassDocImpl#searchMethod */
private MethodSymbol searchMethod(ClassSymbol tsym, Name methodName,
List<Type> paramTypes, Set<ClassSymbol> searched) {
//### Note that this search is not necessarily what the compiler would do!
// do not match constructors
if (methodName == names.init)
return null;
if (searched.contains(tsym))
return null;
searched.add(tsym);
// search current class
com.sun.tools.javac.code.Scope.Entry e = tsym.members().lookup(methodName);
//### Using modifier filter here isn't really correct,
//### but emulates the old behavior. Instead, we should
//### apply the normal rules of visibility and inheritance.
if (paramTypes == null) {
// If no parameters specified, we are allowed to return
// any method with a matching name. In practice, the old
// code returned the first method, which is now the last!
// In order to provide textually identical results, we
// attempt to emulate the old behavior.
MethodSymbol lastFound = null;
for (; e.scope != null; e = e.next()) {
if (e.sym.kind == Kinds.MTH) {
if (e.sym.name == methodName) {
lastFound = (MethodSymbol)e.sym;
}
}
}
if (lastFound != null) {
return lastFound;
}
} else {
for (; e.scope != null; e = e.next()) {
if (e.sym != null &&
e.sym.kind == Kinds.MTH) {
if (hasParameterTypes((MethodSymbol) e.sym, paramTypes)) {
return (MethodSymbol) e.sym;
}
}
}
}
//### If we found a MethodSymbol above, but which did not pass
//### the modifier filter, we should return failure here!
// search superclass
Type superclass = tsym.getSuperclass();
if (superclass.tsym != null) {
MethodSymbol msym = searchMethod((ClassSymbol) superclass.tsym, methodName, paramTypes, searched);
if (msym != null) {
return msym;
}
}
// search interfaces
List<Type> intfs = tsym.getInterfaces();
for (List<Type> l = intfs; l.nonEmpty(); l = l.tail) {
Type intf = l.head;
if (intf.isErroneous()) continue;
MethodSymbol msym = searchMethod((ClassSymbol) intf.tsym, methodName, paramTypes, searched);
if (msym != null) {
return msym;
}
}
// search enclosing class
ClassSymbol encl = tsym.owner.enclClass();
if (encl != null) {
MethodSymbol msym = searchMethod(encl, methodName, paramTypes, searched);
if (msym != null) {
return msym;
}
}
return null;
}
/** @see com.sun.tools.javadoc.ClassDocImpl */
private boolean hasParameterTypes(MethodSymbol method, List<Type> paramTypes) {
if (paramTypes == null)
return true;
if (method.params().size() != paramTypes.size())
return false;
List<Type> methodParamTypes = types.erasureRecursive(method.asType()).getParameterTypes();
return (Type.isErroneous(paramTypes))
? fuzzyMatch(paramTypes, methodParamTypes)
: types.isSameTypes(paramTypes, methodParamTypes);
}
boolean fuzzyMatch(List<Type> paramTypes, List<Type> methodParamTypes) {
List<Type> l1 = paramTypes;
List<Type> l2 = methodParamTypes;
while (l1.nonEmpty()) {
if (!fuzzyMatch(l1.head, l2.head))
return false;
l1 = l1.tail;
l2 = l2.tail;
}
return true;
}
boolean fuzzyMatch(Type paramType, Type methodParamType) {
Boolean b = fuzzyMatcher.visit(paramType, methodParamType);
return (b == Boolean.TRUE);
}
TypeRelation fuzzyMatcher = new TypeRelation() {
@Override
public Boolean visitType(Type t, Type s) {
if (t == s)
return true;
if (s.isPartial())
return visit(s, t);
switch (t.getTag()) {
case BYTE: case CHAR: case SHORT: case INT: case LONG: case FLOAT:
case DOUBLE: case BOOLEAN: case VOID: case BOT: case NONE:
return t.hasTag(s.getTag());
default:
throw new AssertionError("fuzzyMatcher " + t.getTag());
}
}
@Override
public Boolean visitArrayType(ArrayType t, Type s) {
if (t == s)
return true;
if (s.isPartial())
return visit(s, t);
return s.hasTag(ARRAY)
&& visit(t.elemtype, types.elemtype(s));
}
@Override
public Boolean visitClassType(ClassType t, Type s) {
if (t == s)
return true;
if (s.isPartial())
return visit(s, t);
return t.tsym == s.tsym;
}
@Override
public Boolean visitErrorType(ErrorType t, Type s) {
return s.hasTag(CLASS)
&& t.tsym.name == ((ClassType) s).tsym.name;
}
};
public TypeMirror getTypeMirror(TreePath path) {
Tree t = path.getLeaf();
return ((JCTree)t).type;
}
public JavacScope getScope(TreePath path) {
return new JavacScope(getAttrContext(path));
}
public String getDocComment(TreePath path) {
CompilationUnitTree t = path.getCompilationUnit();
Tree leaf = path.getLeaf();
if (t instanceof JCTree.JCCompilationUnit && leaf instanceof JCTree) {
JCCompilationUnit cu = (JCCompilationUnit) t;
if (cu.docComments != null) {
return cu.docComments.getCommentText((JCTree) leaf);
}
}
return null;
}
public DocCommentTree getDocCommentTree(TreePath path) {
CompilationUnitTree t = path.getCompilationUnit();
Tree leaf = path.getLeaf();
if (t instanceof JCTree.JCCompilationUnit && leaf instanceof JCTree) {
JCCompilationUnit cu = (JCCompilationUnit) t;
if (cu.docComments != null) {
return cu.docComments.getCommentTree((JCTree) leaf);
}
}
return null;
}
public boolean isAccessible(Scope scope, TypeElement type) {
if (scope instanceof JavacScope && type instanceof ClassSymbol) {
Env<AttrContext> env = ((JavacScope) scope).env;
return resolve.isAccessible(env, (ClassSymbol)type, true);
} else
return false;
}
public boolean isAccessible(Scope scope, Element member, DeclaredType type) {
if (scope instanceof JavacScope
&& member instanceof Symbol
&& type instanceof com.sun.tools.javac.code.Type) {
Env<AttrContext> env = ((JavacScope) scope).env;
return resolve.isAccessible(env, (com.sun.tools.javac.code.Type)type, (Symbol)member, true);
} else
return false;
}
private Env<AttrContext> getAttrContext(TreePath path) {
if (!(path.getLeaf() instanceof JCTree)) // implicit null-check
throw new IllegalArgumentException();
// if we're being invoked from a Tree API client via parse/enter/analyze,
// we need to make sure all the classes have been entered;
// if we're being invoked from JSR 199 or JSR 269, then the classes
// will already have been entered.
if (javacTaskImpl != null) {
try {
javacTaskImpl.enter(null);
} catch (IOException e) {
throw new Error("unexpected error while entering symbols: " + e);
}
}
JCCompilationUnit unit = (JCCompilationUnit) path.getCompilationUnit();
Copier copier = createCopier(treeMaker.forToplevel(unit));
Env<AttrContext> env = null;
JCMethodDecl method = null;
JCVariableDecl field = null;
List<Tree> l = List.nil();
TreePath p = path;
while (p != null) {
l = l.prepend(p.getLeaf());
p = p.getParentPath();
}
for ( ; l.nonEmpty(); l = l.tail) {
Tree tree = l.head;
switch (tree.getKind()) {
case COMPILATION_UNIT:
// System.err.println("COMP: " + ((JCCompilationUnit)tree).sourcefile);
env = enter.getTopLevelEnv((JCCompilationUnit)tree);
break;
case ANNOTATION_TYPE:
case CLASS:
case ENUM:
case INTERFACE:
// System.err.println("CLASS: " + ((JCClassDecl)tree).sym.getSimpleName());
env = enter.getClassEnv(((JCClassDecl)tree).sym);
break;
case METHOD:
// System.err.println("METHOD: " + ((JCMethodDecl)tree).sym.getSimpleName());
method = (JCMethodDecl)tree;
env = memberEnter.getMethodEnv(method, env);
break;
case VARIABLE:
// System.err.println("FIELD: " + ((JCVariableDecl)tree).sym.getSimpleName());
field = (JCVariableDecl)tree;
break;
case BLOCK: {
// System.err.println("BLOCK: ");
if (method != null) {
try {
Assert.check(method.body == tree);
method.body = copier.copy((JCBlock)tree, (JCTree) path.getLeaf());
env = attribStatToTree(method.body, env, copier.leafCopy);
} finally {
method.body = (JCBlock) tree;
}
} else {
JCBlock body = copier.copy((JCBlock)tree, (JCTree) path.getLeaf());
env = attribStatToTree(body, env, copier.leafCopy);
}
return env;
}
default:
// System.err.println("DEFAULT: " + tree.getKind());
if (field != null && field.getInitializer() == tree) {
env = memberEnter.getInitEnv(field, env);
JCExpression expr = copier.copy((JCExpression)tree, (JCTree) path.getLeaf());
env = attribExprToTree(expr, env, copier.leafCopy);
return env;
}
}
}
return (field != null) ? memberEnter.getInitEnv(field, env) : env;
}
private Env<AttrContext> attribStatToTree(JCTree stat, Env<AttrContext>env, JCTree tree) {
JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
try {
return attr.attribStatToTree(stat, env, tree);
} finally {
log.useSource(prev);
}
}
private Env<AttrContext> attribExprToTree(JCExpression expr, Env<AttrContext>env, JCTree tree) {
JavaFileObject prev = log.useSource(env.toplevel.sourcefile);
try {
return attr.attribExprToTree(expr, env, tree);
} finally {
log.useSource(prev);
}
}
/**
* Makes a copy of a tree, noting the value resulting from copying a particular leaf.
**/
protected static class Copier extends TreeCopier<JCTree> {
JCTree leafCopy = null;
protected Copier(TreeMaker M) {
super(M);
}
@Override
public <T extends JCTree> T copy(T t, JCTree leaf) {
T t2 = super.copy(t, leaf);
if (t == leaf)
leafCopy = t2;
return t2;
}
}
protected Copier createCopier(TreeMaker maker) {
return new Copier(maker);
}
/**
* Gets the original type from the ErrorType object.
* @param errorType The errorType for which we want to get the original type.
* @returns TypeMirror corresponding to the original type, replaced by the ErrorType.
* noType (type.tag == NONE) is returned if there is no original type.
*/
public TypeMirror getOriginalType(javax.lang.model.type.ErrorType errorType) {
if (errorType instanceof com.sun.tools.javac.code.Type.ErrorType) {
return ((com.sun.tools.javac.code.Type.ErrorType)errorType).getOriginalType();
}
return com.sun.tools.javac.code.Type.noType;
}
/**
* Prints a message of the specified kind at the location of the
* tree within the provided compilation unit
*
* @param kind the kind of message
* @param msg the message, or an empty string if none
* @param t the tree to use as a position hint
* @param root the compilation unit that contains tree
*/
public void printMessage(Diagnostic.Kind kind, CharSequence msg,
com.sun.source.tree.Tree t,
com.sun.source.tree.CompilationUnitTree root) {
printMessage(kind, msg, ((JCTree) t).pos(), root);
}
public void printMessage(Diagnostic.Kind kind, CharSequence msg,
com.sun.source.doctree.DocTree t,
com.sun.source.doctree.DocCommentTree c,
com.sun.source.tree.CompilationUnitTree root) {
printMessage(kind, msg, ((DCTree) t).pos((DCDocComment) c), root);
}
private void printMessage(Diagnostic.Kind kind, CharSequence msg,
JCDiagnostic.DiagnosticPosition pos,
com.sun.source.tree.CompilationUnitTree root) {
JavaFileObject oldSource = null;
JavaFileObject newSource = null;
newSource = root.getSourceFile();
if (newSource == null) {
pos = null;
} else {
oldSource = log.useSource(newSource);
}
try {
switch (kind) {
case ERROR:
boolean prev = log.multipleErrors;
try {
log.error(pos, "proc.messager", msg.toString());
} finally {
log.multipleErrors = prev;
}
break;
case WARNING:
log.warning(pos, "proc.messager", msg.toString());
break;
case MANDATORY_WARNING:
log.mandatoryWarning(pos, "proc.messager", msg.toString());
break;
default:
log.note(pos, "proc.messager", msg.toString());
}
} finally {
if (oldSource != null)
log.useSource(oldSource);
}
}
@Override
public TypeMirror getLub(CatchTree tree) {
JCCatch ct = (JCCatch) tree;
JCVariableDecl v = ct.param;
if (v.type != null && v.type.getKind() == TypeKind.UNION) {
UnionClassType ut = (UnionClassType) v.type;
return ut.getLub();
} else {
return v.type;
}
}
}