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// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
package org.objectweb.asm.tree;
import java.util.ArrayList;
import java.util.List;
import org.objectweb.asm.AnnotationVisitor;
import org.objectweb.asm.Attribute;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.ModuleVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.RecordComponentVisitor;
import org.objectweb.asm.TypePath;
/**
* A node that represents a class.
*
* @author Eric Bruneton
*/
public class ClassNode extends ClassVisitor {
/**
* The class version. The minor version is stored in the 16 most significant bits, and the major
* version in the 16 least significant bits.
*/
public int version;
/**
* The class's access flags (see {@link org.objectweb.asm.Opcodes}). This field also indicates if
* the class is deprecated {@link Opcodes#ACC_DEPRECATED} or a record {@link Opcodes#ACC_RECORD}.
*/
public int access;
/** The internal name of this class (see {@link org.objectweb.asm.Type#getInternalName()}). */
public String name;
/** The signature of this class. May be {@literal null}. */
public String signature;
/**
* The internal of name of the super class (see {@link org.objectweb.asm.Type#getInternalName()}).
* For interfaces, the super class is {@link Object}. May be {@literal null}, but only for the
* {@link Object} class.
*/
public String superName;
/**
* The internal names of the interfaces directly implemented by this class (see {@link
* org.objectweb.asm.Type#getInternalName()}).
*/
public List interfaces;
/** The name of the source file from which this class was compiled. May be {@literal null}. */
public String sourceFile;
/**
* The correspondence between source and compiled elements of this class. May be {@literal null}.
*/
public String sourceDebug;
/** The module stored in this class. May be {@literal null}. */
public ModuleNode module;
/**
* The internal name of the enclosing class of this class (see {@link
* org.objectweb.asm.Type#getInternalName()}). Must be {@literal null} if this class has no
* enclosing class, or if it is a local or anonymous class.
*/
public String outerClass;
/**
* The name of the method that contains the class, or {@literal null} if the class has no
* enclosing class, or is not enclosed in a method or constructor of its enclosing class (e.g. if
* it is enclosed in an instance initializer, static initializer, instance variable initializer,
* or class variable initializer).
*/
public String outerMethod;
/**
* The descriptor of the method that contains the class, or {@literal null} if the class has no
* enclosing class, or is not enclosed in a method or constructor of its enclosing class (e.g. if
* it is enclosed in an instance initializer, static initializer, instance variable initializer,
* or class variable initializer).
*/
public String outerMethodDesc;
/** The runtime visible annotations of this class. May be {@literal null}. */
public List visibleAnnotations;
/** The runtime invisible annotations of this class. May be {@literal null}. */
public List invisibleAnnotations;
/** The runtime visible type annotations of this class. May be {@literal null}. */
public List visibleTypeAnnotations;
/** The runtime invisible type annotations of this class. May be {@literal null}. */
public List invisibleTypeAnnotations;
/** The non standard attributes of this class. May be {@literal null}. */
public List attrs;
/** The inner classes of this class. */
public List innerClasses;
/**
* The internal name of the nest host class of this class (see {@link
* org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
*/
public String nestHostClass;
/**
* The internal names of the nest members of this class (see {@link
* org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
*/
public List nestMembers;
/**
* The internal names of the permitted subclasses of this class (see {@link
* org.objectweb.asm.Type#getInternalName()}). May be {@literal null}.
*/
public List permittedSubclasses;
/** The record components of this class. May be {@literal null}. */
public List recordComponents;
/** The fields of this class. */
public List fields;
/** The methods of this class. */
public List methods;
/**
* Constructs a new {@link ClassNode}. Subclasses must not use this constructor. Instead,
* they must use the {@link #ClassNode(int)} version.
*
* @throws IllegalStateException If a subclass calls this constructor.
*/
public ClassNode() {
this(Opcodes.ASM9);
if (getClass() != ClassNode.class) {
throw new IllegalStateException();
}
}
/**
* Constructs a new {@link ClassNode}.
*
* @param api the ASM API version implemented by this visitor. Must be one of the {@code
* ASM}x values in {@link Opcodes}.
*/
public ClassNode(final int api) {
super(api);
this.interfaces = new ArrayList<>();
this.innerClasses = new ArrayList<>();
this.fields = new ArrayList<>();
this.methods = new ArrayList<>();
}
// -----------------------------------------------------------------------------------------------
// Implementation of the ClassVisitor abstract class
// -----------------------------------------------------------------------------------------------
@Override
public void visit(
final int version,
final int access,
final String name,
final String signature,
final String superName,
final String[] interfaces) {
this.version = version;
this.access = access;
this.name = name;
this.signature = signature;
this.superName = superName;
this.interfaces = Util.asArrayList(interfaces);
}
@Override
public void visitSource(final String file, final String debug) {
sourceFile = file;
sourceDebug = debug;
}
@Override
public ModuleVisitor visitModule(final String name, final int access, final String version) {
module = new ModuleNode(name, access, version);
return module;
}
@Override
public void visitNestHost(final String nestHost) {
this.nestHostClass = nestHost;
}
@Override
public void visitOuterClass(final String owner, final String name, final String descriptor) {
outerClass = owner;
outerMethod = name;
outerMethodDesc = descriptor;
}
@Override
public AnnotationVisitor visitAnnotation(final String descriptor, final boolean visible) {
AnnotationNode annotation = new AnnotationNode(descriptor);
if (visible) {
visibleAnnotations = Util.add(visibleAnnotations, annotation);
} else {
invisibleAnnotations = Util.add(invisibleAnnotations, annotation);
}
return annotation;
}
@Override
public AnnotationVisitor visitTypeAnnotation(
final int typeRef, final TypePath typePath, final String descriptor, final boolean visible) {
TypeAnnotationNode typeAnnotation = new TypeAnnotationNode(typeRef, typePath, descriptor);
if (visible) {
visibleTypeAnnotations = Util.add(visibleTypeAnnotations, typeAnnotation);
} else {
invisibleTypeAnnotations = Util.add(invisibleTypeAnnotations, typeAnnotation);
}
return typeAnnotation;
}
@Override
public void visitAttribute(final Attribute attribute) {
attrs = Util.add(attrs, attribute);
}
@Override
public void visitNestMember(final String nestMember) {
nestMembers = Util.add(nestMembers, nestMember);
}
@Override
public void visitPermittedSubclass(final String permittedSubclass) {
permittedSubclasses = Util.add(permittedSubclasses, permittedSubclass);
}
@Override
public void visitInnerClass(
final String name, final String outerName, final String innerName, final int access) {
InnerClassNode innerClass = new InnerClassNode(name, outerName, innerName, access);
innerClasses.add(innerClass);
}
@Override
public RecordComponentVisitor visitRecordComponent(
final String name, final String descriptor, final String signature) {
RecordComponentNode recordComponent = new RecordComponentNode(name, descriptor, signature);
recordComponents = Util.add(recordComponents, recordComponent);
return recordComponent;
}
@Override
public FieldVisitor visitField(
final int access,
final String name,
final String descriptor,
final String signature,
final Object value) {
FieldNode field = new FieldNode(access, name, descriptor, signature, value);
fields.add(field);
return field;
}
@Override
public MethodVisitor visitMethod(
final int access,
final String name,
final String descriptor,
final String signature,
final String[] exceptions) {
MethodNode method = new MethodNode(access, name, descriptor, signature, exceptions);
methods.add(method);
return method;
}
@Override
public void visitEnd() {
// Nothing to do.
}
// -----------------------------------------------------------------------------------------------
// Accept method
// -----------------------------------------------------------------------------------------------
/**
* Checks that this class node is compatible with the given ASM API version. This method checks
* that this node, and all its children recursively, do not contain elements that were introduced
* in more recent versions of the ASM API than the given version.
*
* @param api an ASM API version. Must be one of the {@code ASM}x values in {@link
* Opcodes}.
*/
public void check(final int api) {
if (api < Opcodes.ASM9 && permittedSubclasses != null) {
throw new UnsupportedClassVersionException();
}
if (api < Opcodes.ASM8 && ((access & Opcodes.ACC_RECORD) != 0 || recordComponents != null)) {
throw new UnsupportedClassVersionException();
}
if (api < Opcodes.ASM7 && (nestHostClass != null || nestMembers != null)) {
throw new UnsupportedClassVersionException();
}
if (api < Opcodes.ASM6 && module != null) {
throw new UnsupportedClassVersionException();
}
if (api < Opcodes.ASM5) {
if (visibleTypeAnnotations != null && !visibleTypeAnnotations.isEmpty()) {
throw new UnsupportedClassVersionException();
}
if (invisibleTypeAnnotations != null && !invisibleTypeAnnotations.isEmpty()) {
throw new UnsupportedClassVersionException();
}
}
// Check the annotations.
if (visibleAnnotations != null) {
for (int i = visibleAnnotations.size() - 1; i >= 0; --i) {
visibleAnnotations.get(i).check(api);
}
}
if (invisibleAnnotations != null) {
for (int i = invisibleAnnotations.size() - 1; i >= 0; --i) {
invisibleAnnotations.get(i).check(api);
}
}
if (visibleTypeAnnotations != null) {
for (int i = visibleTypeAnnotations.size() - 1; i >= 0; --i) {
visibleTypeAnnotations.get(i).check(api);
}
}
if (invisibleTypeAnnotations != null) {
for (int i = invisibleTypeAnnotations.size() - 1; i >= 0; --i) {
invisibleTypeAnnotations.get(i).check(api);
}
}
if (recordComponents != null) {
for (int i = recordComponents.size() - 1; i >= 0; --i) {
recordComponents.get(i).check(api);
}
}
for (int i = fields.size() - 1; i >= 0; --i) {
fields.get(i).check(api);
}
for (int i = methods.size() - 1; i >= 0; --i) {
methods.get(i).check(api);
}
}
/**
* Makes the given class visitor visit this class.
*
* @param classVisitor a class visitor.
*/
public void accept(final ClassVisitor classVisitor) {
// Visit the header.
String[] interfacesArray = new String[this.interfaces.size()];
this.interfaces.toArray(interfacesArray);
classVisitor.visit(version, access, name, signature, superName, interfacesArray);
// Visit the source.
if (sourceFile != null || sourceDebug != null) {
classVisitor.visitSource(sourceFile, sourceDebug);
}
// Visit the module.
if (module != null) {
module.accept(classVisitor);
}
// Visit the nest host class.
if (nestHostClass != null) {
classVisitor.visitNestHost(nestHostClass);
}
// Visit the outer class.
if (outerClass != null) {
classVisitor.visitOuterClass(outerClass, outerMethod, outerMethodDesc);
}
// Visit the annotations.
if (visibleAnnotations != null) {
for (int i = 0, n = visibleAnnotations.size(); i < n; ++i) {
AnnotationNode annotation = visibleAnnotations.get(i);
annotation.accept(classVisitor.visitAnnotation(annotation.desc, true));
}
}
if (invisibleAnnotations != null) {
for (int i = 0, n = invisibleAnnotations.size(); i < n; ++i) {
AnnotationNode annotation = invisibleAnnotations.get(i);
annotation.accept(classVisitor.visitAnnotation(annotation.desc, false));
}
}
if (visibleTypeAnnotations != null) {
for (int i = 0, n = visibleTypeAnnotations.size(); i < n; ++i) {
TypeAnnotationNode typeAnnotation = visibleTypeAnnotations.get(i);
typeAnnotation.accept(
classVisitor.visitTypeAnnotation(
typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, true));
}
}
if (invisibleTypeAnnotations != null) {
for (int i = 0, n = invisibleTypeAnnotations.size(); i < n; ++i) {
TypeAnnotationNode typeAnnotation = invisibleTypeAnnotations.get(i);
typeAnnotation.accept(
classVisitor.visitTypeAnnotation(
typeAnnotation.typeRef, typeAnnotation.typePath, typeAnnotation.desc, false));
}
}
// Visit the non standard attributes.
if (attrs != null) {
for (int i = 0, n = attrs.size(); i < n; ++i) {
classVisitor.visitAttribute(attrs.get(i));
}
}
// Visit the nest members.
if (nestMembers != null) {
for (int i = 0, n = nestMembers.size(); i < n; ++i) {
classVisitor.visitNestMember(nestMembers.get(i));
}
}
// Visit the permitted subclasses.
if (permittedSubclasses != null) {
for (int i = 0, n = permittedSubclasses.size(); i < n; ++i) {
classVisitor.visitPermittedSubclass(permittedSubclasses.get(i));
}
}
// Visit the inner classes.
for (int i = 0, n = innerClasses.size(); i < n; ++i) {
innerClasses.get(i).accept(classVisitor);
}
// Visit the record components.
if (recordComponents != null) {
for (int i = 0, n = recordComponents.size(); i < n; ++i) {
recordComponents.get(i).accept(classVisitor);
}
}
// Visit the fields.
for (int i = 0, n = fields.size(); i < n; ++i) {
fields.get(i).accept(classVisitor);
}
// Visit the methods.
for (int i = 0, n = methods.size(); i < n; ++i) {
methods.get(i).accept(classVisitor);
}
classVisitor.visitEnd();
}
}
