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/*
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* Copyright 1994-2006 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 sun.tools.java;
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import java.io.IOException;
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import java.io.DataInputStream;
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import java.io.OutputStream;
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import java.io.DataOutputStream;
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import java.io.ByteArrayInputStream;
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import java.util.Hashtable;
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import java.util.Vector;
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import java.util.Enumeration;
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/**
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* WARNING: The contents of this source file are not part of any
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* supported API. Code that depends on them does so at its own risk:
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* they are subject to change or removal without notice.
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*/
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public final
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class BinaryClass extends ClassDefinition implements Constants {
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BinaryConstantPool cpool;
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BinaryAttribute atts;
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Vector dependencies;
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private boolean haveLoadedNested = false;
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/**
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* Constructor
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*/
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public BinaryClass(Object source, ClassDeclaration declaration, int modifiers,
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ClassDeclaration superClass, ClassDeclaration interfaces[],
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Vector dependencies) {
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super(source, 0, declaration, modifiers, null, null);
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this.dependencies = dependencies;
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this.superClass = superClass;
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this.interfaces = interfaces;
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}
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/**
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* Flags used by basicCheck() to avoid duplicate calls.
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* (Part of fix for 4105911)
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*/
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private boolean basicCheckDone = false;
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private boolean basicChecking = false;
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/**
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* Ready a BinaryClass for further checking. Note that, until recently,
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* BinaryClass relied on the default basicCheck() provided by
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* ClassDefinition. The definition here has been added to ensure that
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* the information generated by collectInheritedMethods is available
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* for BinaryClasses.
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*/
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protected void basicCheck(Environment env) throws ClassNotFound {
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if (tracing) env.dtEnter("BinaryClass.basicCheck: " + getName());
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// We need to guard against duplicate calls to basicCheck(). They
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// can lead to calling collectInheritedMethods() for this class
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// from within a previous call to collectInheritedMethods() for
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// this class. That is not allowed.
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// (Part of fix for 4105911)
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if (basicChecking || basicCheckDone) {
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if (tracing) env.dtExit("BinaryClass.basicCheck: OK " + getName());
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return;
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}
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if (tracing) env.dtEvent("BinaryClass.basicCheck: CHECKING " + getName());
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basicChecking = true;
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super.basicCheck(env);
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// Collect inheritance information.
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if (doInheritanceChecks) {
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collectInheritedMethods(env);
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}
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basicCheckDone = true;
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basicChecking = false;
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if (tracing) env.dtExit("BinaryClass.basicCheck: " + getName());
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}
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/**
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* Load a binary class
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*/
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public static BinaryClass load(Environment env, DataInputStream in) throws IOException {
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return load(env, in, ~(ATT_CODE|ATT_ALLCLASSES));
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}
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public static BinaryClass load(Environment env,
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DataInputStream in, int mask) throws IOException {
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// Read the header
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int magic = in.readInt(); // JVM 4.1 ClassFile.magic
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if (magic != JAVA_MAGIC) {
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throw new ClassFormatError("wrong magic: " + magic + ", expected " + JAVA_MAGIC);
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}
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int minor_version = in.readUnsignedShort(); // JVM 4.1 ClassFile.minor_version
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int version = in.readUnsignedShort(); // JVM 4.1 ClassFile.major_version
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if (version < JAVA_MIN_SUPPORTED_VERSION) {
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throw new ClassFormatError(
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sun.tools.javac.Main.getText(
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"javac.err.version.too.old",
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String.valueOf(version)));
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} else if ((version > JAVA_MAX_SUPPORTED_VERSION)
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|| (version == JAVA_MAX_SUPPORTED_VERSION
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&& minor_version > JAVA_MAX_SUPPORTED_MINOR_VERSION)) {
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throw new ClassFormatError(
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sun.tools.javac.Main.getText(
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"javac.err.version.too.recent",
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version+"."+minor_version));
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}
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// Read the constant pool
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BinaryConstantPool cpool = new BinaryConstantPool(in);
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// The dependencies of this class
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Vector dependencies = cpool.getDependencies(env);
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// Read modifiers
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int classMod = in.readUnsignedShort() & ACCM_CLASS; // JVM 4.1 ClassFile.access_flags
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// Read the class name - from JVM 4.1 ClassFile.this_class
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ClassDeclaration classDecl = cpool.getDeclaration(env, in.readUnsignedShort());
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// Read the super class name (may be null) - from JVM 4.1 ClassFile.super_class
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ClassDeclaration superClassDecl = cpool.getDeclaration(env, in.readUnsignedShort());
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// Read the interface names - from JVM 4.1 ClassFile.interfaces_count
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ClassDeclaration interfaces[] = new ClassDeclaration[in.readUnsignedShort()];
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for (int i = 0 ; i < interfaces.length ; i++) {
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// JVM 4.1 ClassFile.interfaces[]
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interfaces[i] = cpool.getDeclaration(env, in.readUnsignedShort());
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}
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// Allocate the class
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BinaryClass c = new BinaryClass(null, classDecl, classMod, superClassDecl,
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interfaces, dependencies);
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c.cpool = cpool;
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// Add any additional dependencies
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c.addDependency(superClassDecl);
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// Read the fields
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int nfields = in.readUnsignedShort(); // JVM 4.1 ClassFile.fields_count
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for (int i = 0 ; i < nfields ; i++) {
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// JVM 4.5 field_info.access_flags
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int fieldMod = in.readUnsignedShort() & ACCM_FIELD;
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// JVM 4.5 field_info.name_index
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Identifier fieldName = cpool.getIdentifier(in.readUnsignedShort());
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// JVM 4.5 field_info.descriptor_index
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Type fieldType = cpool.getType(in.readUnsignedShort());
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BinaryAttribute atts = BinaryAttribute.load(in, cpool, mask);
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c.addMember(new BinaryMember(c, fieldMod, fieldType, fieldName, atts));
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}
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// Read the methods
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int nmethods = in.readUnsignedShort(); // JVM 4.1 ClassFile.methods_count
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for (int i = 0 ; i < nmethods ; i++) {
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// JVM 4.6 method_info.access_flags
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int methMod = in.readUnsignedShort() & ACCM_METHOD;
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// JVM 4.6 method_info.name_index
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Identifier methName = cpool.getIdentifier(in.readUnsignedShort());
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// JVM 4.6 method_info.descriptor_index
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Type methType = cpool.getType(in.readUnsignedShort());
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BinaryAttribute atts = BinaryAttribute.load(in, cpool, mask);
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c.addMember(new BinaryMember(c, methMod, methType, methName, atts));
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}
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// Read the class attributes
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c.atts = BinaryAttribute.load(in, cpool, mask);
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// See if the SourceFile is known
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byte data[] = c.getAttribute(idSourceFile);
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if (data != null) {
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DataInputStream dataStream = new DataInputStream(new ByteArrayInputStream(data));
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// JVM 4.7.2 SourceFile_attribute.sourcefile_index
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c.source = cpool.getString(dataStream.readUnsignedShort());
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}
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// See if the Documentation is know
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data = c.getAttribute(idDocumentation);
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if (data != null) {
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c.documentation = new DataInputStream(new ByteArrayInputStream(data)).readUTF();
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}
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// Was it compiled as deprecated?
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if (c.getAttribute(idDeprecated) != null) {
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c.modifiers |= M_DEPRECATED;
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}
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// Was it synthesized by the compiler?
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if (c.getAttribute(idSynthetic) != null) {
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c.modifiers |= M_SYNTHETIC;
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}
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return c;
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}
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/**
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* Called when an environment ties a binary definition to a declaration.
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* At this point, auxiliary definitions may be loaded.
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*/
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public void loadNested(Environment env) {
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loadNested(env, 0);
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}
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public void loadNested(Environment env, int flags) {
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// Sanity check.
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if (haveLoadedNested) {
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// Duplicate calls most likely should not occur, but they do
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// in javap. Be tolerant of them for the time being.
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// throw new CompilerError("multiple loadNested");
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if (tracing) env.dtEvent("loadNested: DUPLICATE CALL SKIPPED");
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return;
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}
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haveLoadedNested = true;
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// Read class-nesting information.
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try {
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byte data[];
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data = getAttribute(idInnerClasses);
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if (data != null) {
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initInnerClasses(env, data, flags);
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}
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} catch (IOException ee) {
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// The inner classes attribute is not well-formed.
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// It may, for example, contain no data. Report this.
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// We used to throw a CompilerError here (bug 4095108).
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env.error(0, "malformed.attribute", getClassDeclaration(),
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idInnerClasses);
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if (tracing)
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env.dtEvent("loadNested: MALFORMED ATTRIBUTE (InnerClasses)");
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}
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}
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private void initInnerClasses(Environment env,
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byte data[],
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int flags) throws IOException {
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DataInputStream ds = new DataInputStream(new ByteArrayInputStream(data));
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int nrec = ds.readUnsignedShort(); // InnerClasses_attribute.number_of_classes
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for (int i = 0; i < nrec; i++) {
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// For each inner class name transformation, we have a record
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// with the following fields:
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//
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// u2 inner_class_info_index; // CONSTANT_Class_info index
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// u2 outer_class_info_index; // CONSTANT_Class_info index
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// u2 inner_name_index; // CONSTANT_Utf8_info index
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// u2 inner_class_access_flags; // access_flags bitmask
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//
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// The spec states that outer_class_info_index is 0 iff
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// the inner class is not a member of its enclosing class (i.e.
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// it is a local or anonymous class). The spec also states
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// that if a class is anonymous then inner_name_index should
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// be 0.
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//
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// Prior to jdk1.2, javac did not implement the spec. Instead
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// it <em>always</em> set outer_class_info_index to the
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// enclosing outer class and if the class was anonymous,
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// it set inner_name_index to be the index of a CONSTANT_Utf8
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// entry containing the null string "" (idNull). This code is
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// designed to handle either kind of class file.
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//
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// See also the compileClass() method in SourceClass.java.
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// Read in the inner_class_info
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// InnerClasses_attribute.classes.inner_class_info_index
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int inner_index = ds.readUnsignedShort();
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// could check for zero.
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ClassDeclaration inner = cpool.getDeclaration(env, inner_index);
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// Read in the outer_class_info. Note that the index will be
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// zero if the class is "not a member".
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ClassDeclaration outer = null;
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// InnerClasses_attribute.classes.outer_class_info_index
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int outer_index = ds.readUnsignedShort();
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if (outer_index != 0) {
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outer = cpool.getDeclaration(env, outer_index);
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}
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// Read in the inner_name_index. This may be zero. An anonymous
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// class will either have an inner_nm_index of zero (as the spec
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// dictates) or it will have an inner_nm of idNull (for classes
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// generated by pre-1.2 compilers). Handle both.
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Identifier inner_nm = idNull;
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// InnerClasses_attribute.classes.inner_name_index
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int inner_nm_index = ds.readUnsignedShort();
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if (inner_nm_index != 0) {
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inner_nm = Identifier.lookup(cpool.getString(inner_nm_index));
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}
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// Read in the modifiers for the inner class.
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// InnerClasses_attribute.classes.inner_name_index
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int mods = ds.readUnsignedShort();
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// Is the class accessible?
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// The old code checked for
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//
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// (!inner_nm.equals(idNull) && (mods & M_PRIVATE) == 0)
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//
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// which we will preserve to keep it working for class files
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// generated by 1.1 compilers. In addition we check for
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//
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// (outer != null)
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//
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// as an additional check that only makes sense with 1.2
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// generated files. Note that it is entirely possible that
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// the M_PRIVATE bit is always enough. We are being
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// conservative here.
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//
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// The ATT_ALLCLASSES flag causes the M_PRIVATE modifier
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// to be ignored, and is used by tools such as 'javap' that
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// wish to examine all classes regardless of the normal access
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// controls that apply during compilation. Note that anonymous
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// and local classes are still not considered accessible, though
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// named local classes in jdk1.1 may slip through. Note that
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// this accessibility test is an optimization, and it is safe to
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// err on the side of greater accessibility.
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boolean accessible =
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(outer != null) &&
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(!inner_nm.equals(idNull)) &&
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((mods & M_PRIVATE) == 0 ||
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(flags & ATT_ALLCLASSES) != 0);
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343 |
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// The reader should note that there has been a significant change
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// in the way that the InnerClasses attribute is being handled.
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// In particular, previously the compiler called initInner() for
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// <em>every</em> inner class. Now the compiler does not call
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// initInner() if the inner class is inaccessible. This means
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// that inaccessible inner classes don't have any of the processing
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// from initInner() done for them: fixing the access flags,
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// setting outerClass, setting outerMember in their outerClass,
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// etc. We believe this is fine: if the class is inaccessible
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// and binary, then everyone who needs to see its internals
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// has already been compiled. Hopefully.
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356 |
if (accessible) {
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Identifier nm =
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Identifier.lookupInner(outer.getName(), inner_nm);
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// Tell the type module about the nesting relation:
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Type.tClass(nm);
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363 |
if (inner.equals(getClassDeclaration())) {
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// The inner class in the record is this class.
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365 |
try {
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ClassDefinition outerClass = outer.getClassDefinition(env);
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367 |
initInner(outerClass, mods);
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368 |
} catch (ClassNotFound e) {
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// report the error elsewhere
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370 |
}
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371 |
} else if (outer.equals(getClassDeclaration())) {
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// The outer class in the record is this class.
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373 |
try {
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374 |
ClassDefinition innerClass =
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375 |
inner.getClassDefinition(env);
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376 |
initOuter(innerClass, mods);
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377 |
} catch (ClassNotFound e) {
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378 |
// report the error elsewhere
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379 |
}
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380 |
}
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381 |
}
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382 |
}
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383 |
}
|
|
384 |
|
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385 |
private void initInner(ClassDefinition outerClass, int mods) {
|
|
386 |
if (getOuterClass() != null)
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387 |
return; // already done
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388 |
/******
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389 |
// Maybe set static, protected, or private.
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390 |
if ((modifiers & M_PUBLIC) != 0)
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391 |
mods &= M_STATIC;
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392 |
else
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393 |
mods &= M_PRIVATE | M_PROTECTED | M_STATIC;
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394 |
modifiers |= mods;
|
|
395 |
******/
|
|
396 |
// For an inner class, the class access may have been weakened
|
|
397 |
// from that originally declared the source. We must take the
|
|
398 |
// actual access permissions against which we check any source
|
|
399 |
// we are currently compiling from the InnerClasses attribute.
|
|
400 |
// We attempt to guard here against bogus combinations of modifiers.
|
|
401 |
if ((mods & M_PRIVATE) != 0) {
|
|
402 |
// Private cannot be combined with public or protected.
|
|
403 |
mods &= ~(M_PUBLIC | M_PROTECTED);
|
|
404 |
} else if ((mods & M_PROTECTED) != 0) {
|
|
405 |
// Protected cannot be combined with public.
|
|
406 |
mods &= ~M_PUBLIC;
|
|
407 |
}
|
|
408 |
if ((mods & M_INTERFACE) != 0) {
|
|
409 |
// All interfaces are implicitly abstract.
|
|
410 |
// All interfaces that are members of a type are implicitly static.
|
|
411 |
mods |= (M_ABSTRACT | M_STATIC);
|
|
412 |
}
|
|
413 |
if (outerClass.isInterface()) {
|
|
414 |
// All types that are members of interfaces are implicitly
|
|
415 |
// public and static.
|
|
416 |
mods |= (M_PUBLIC | M_STATIC);
|
|
417 |
mods &= ~(M_PRIVATE | M_PROTECTED);
|
|
418 |
}
|
|
419 |
modifiers = mods;
|
|
420 |
|
|
421 |
setOuterClass(outerClass);
|
|
422 |
|
|
423 |
for (MemberDefinition field = getFirstMember();
|
|
424 |
field != null;
|
|
425 |
field = field.getNextMember()) {
|
|
426 |
if (field.isUplevelValue()
|
|
427 |
&& outerClass.getType().equals(field.getType())
|
|
428 |
&& field.getName().toString().startsWith(prefixThis)) {
|
|
429 |
setOuterMember(field);
|
|
430 |
}
|
|
431 |
}
|
|
432 |
}
|
|
433 |
|
|
434 |
private void initOuter(ClassDefinition innerClass, int mods) {
|
|
435 |
if (innerClass instanceof BinaryClass)
|
|
436 |
((BinaryClass)innerClass).initInner(this, mods);
|
|
437 |
addMember(new BinaryMember(innerClass));
|
|
438 |
}
|
|
439 |
|
|
440 |
/**
|
|
441 |
* Write the class out to a given stream. This function mirrors the loader.
|
|
442 |
*/
|
|
443 |
public void write(Environment env, OutputStream out) throws IOException {
|
|
444 |
DataOutputStream data = new DataOutputStream(out);
|
|
445 |
|
|
446 |
// write out the header
|
|
447 |
data.writeInt(JAVA_MAGIC);
|
|
448 |
data.writeShort(env.getMinorVersion());
|
|
449 |
data.writeShort(env.getMajorVersion());
|
|
450 |
|
|
451 |
// Write out the constant pool
|
|
452 |
cpool.write(data, env);
|
|
453 |
|
|
454 |
// Write class information
|
|
455 |
data.writeShort(getModifiers() & ACCM_CLASS);
|
|
456 |
data.writeShort(cpool.indexObject(getClassDeclaration(), env));
|
|
457 |
data.writeShort((getSuperClass() != null)
|
|
458 |
? cpool.indexObject(getSuperClass(), env) : 0);
|
|
459 |
data.writeShort(interfaces.length);
|
|
460 |
for (int i = 0 ; i < interfaces.length ; i++) {
|
|
461 |
data.writeShort(cpool.indexObject(interfaces[i], env));
|
|
462 |
}
|
|
463 |
|
|
464 |
// count the fields and the methods
|
|
465 |
int fieldCount = 0, methodCount = 0;
|
|
466 |
for (MemberDefinition f = firstMember; f != null; f = f.getNextMember())
|
|
467 |
if (f.isMethod()) methodCount++; else fieldCount++;
|
|
468 |
|
|
469 |
// write out each the field count, and then each field
|
|
470 |
data.writeShort(fieldCount);
|
|
471 |
for (MemberDefinition f = firstMember; f != null; f = f.getNextMember()) {
|
|
472 |
if (!f.isMethod()) {
|
|
473 |
data.writeShort(f.getModifiers() & ACCM_FIELD);
|
|
474 |
String name = f.getName().toString();
|
|
475 |
String signature = f.getType().getTypeSignature();
|
|
476 |
data.writeShort(cpool.indexString(name, env));
|
|
477 |
data.writeShort(cpool.indexString(signature, env));
|
|
478 |
BinaryAttribute.write(((BinaryMember)f).atts, data, cpool, env);
|
|
479 |
}
|
|
480 |
}
|
|
481 |
|
|
482 |
// write out each method count, and then each method
|
|
483 |
data.writeShort(methodCount);
|
|
484 |
for (MemberDefinition f = firstMember; f != null; f = f.getNextMember()) {
|
|
485 |
if (f.isMethod()) {
|
|
486 |
data.writeShort(f.getModifiers() & ACCM_METHOD);
|
|
487 |
String name = f.getName().toString();
|
|
488 |
String signature = f.getType().getTypeSignature();
|
|
489 |
data.writeShort(cpool.indexString(name, env));
|
|
490 |
data.writeShort(cpool.indexString(signature, env));
|
|
491 |
BinaryAttribute.write(((BinaryMember)f).atts, data, cpool, env);
|
|
492 |
}
|
|
493 |
}
|
|
494 |
|
|
495 |
// write out the class attributes
|
|
496 |
BinaryAttribute.write(atts, data, cpool, env);
|
|
497 |
data.flush();
|
|
498 |
}
|
|
499 |
|
|
500 |
/**
|
|
501 |
* Get the dependencies
|
|
502 |
*/
|
|
503 |
public Enumeration getDependencies() {
|
|
504 |
return dependencies.elements();
|
|
505 |
}
|
|
506 |
|
|
507 |
/**
|
|
508 |
* Add a dependency
|
|
509 |
*/
|
|
510 |
public void addDependency(ClassDeclaration c) {
|
|
511 |
if ((c != null) && !dependencies.contains(c)) {
|
|
512 |
dependencies.addElement(c);
|
|
513 |
}
|
|
514 |
}
|
|
515 |
|
|
516 |
/**
|
|
517 |
* Get the constant pool
|
|
518 |
*/
|
|
519 |
public BinaryConstantPool getConstants() {
|
|
520 |
return cpool;
|
|
521 |
}
|
|
522 |
|
|
523 |
/**
|
|
524 |
* Get a class attribute
|
|
525 |
*/
|
|
526 |
public byte getAttribute(Identifier name)[] {
|
|
527 |
for (BinaryAttribute att = atts ; att != null ; att = att.next) {
|
|
528 |
if (att.name.equals(name)) {
|
|
529 |
return att.data;
|
|
530 |
}
|
|
531 |
}
|
|
532 |
return null;
|
|
533 |
}
|
|
534 |
}
|