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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.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.Opcodes;
import org.objectweb.asm.TypePath;
/**
* A node that represents a field.
*
* @author Eric Bruneton
*/
public class FieldNode extends FieldVisitor {
/**
* The field's access flags (see {@link org.objectweb.asm.Opcodes}). This field also indicates if
* the field is synthetic and/or deprecated.
*/
public int access;
/** The field's name. */
public String name;
/** The field's descriptor (see {@link org.objectweb.asm.Type}). */
public String desc;
/** The field's signature. May be {@literal null}. */
public String signature;
/**
* The field's initial value. This field, which may be {@literal null} if the field does not have
* an initial value, must be an {@link Integer}, a {@link Float}, a {@link Long}, a {@link Double}
* or a {@link String}.
*/
public Object value;
/** The runtime visible annotations of this field. May be {@literal null}. */
public List visibleAnnotations;
/** The runtime invisible annotations of this field. May be {@literal null}. */
public List invisibleAnnotations;
/** The runtime visible type annotations of this field. May be {@literal null}. */
public List visibleTypeAnnotations;
/** The runtime invisible type annotations of this field. May be {@literal null}. */
public List invisibleTypeAnnotations;
/** The non standard attributes of this field. * May be {@literal null}. */
public List attrs;
/**
* Constructs a new {@link FieldNode}. Subclasses must not use this constructor. Instead,
* they must use the {@link #FieldNode(int, int, String, String, String, Object)} version.
*
* @param access the field's access flags (see {@link org.objectweb.asm.Opcodes}). This parameter
* also indicates if the field is synthetic and/or deprecated.
* @param name the field's name.
* @param descriptor the field's descriptor (see {@link org.objectweb.asm.Type}).
* @param signature the field's signature.
* @param value the field's initial value. This parameter, which may be {@literal null} if the
* field does not have an initial value, must be an {@link Integer}, a {@link Float}, a {@link
* Long}, a {@link Double} or a {@link String}.
* @throws IllegalStateException If a subclass calls this constructor.
*/
public FieldNode(
final int access,
final String name,
final String descriptor,
final String signature,
final Object value) {
this(/* latest api = */ Opcodes.ASM9, access, name, descriptor, signature, value);
if (getClass() != FieldNode.class) {
throw new IllegalStateException();
}
}
/**
* Constructs a new {@link FieldNode}.
*
* @param api the ASM API version implemented by this visitor. Must be one of the {@code
* ASM}x values in {@link Opcodes}.
* @param access the field's access flags (see {@link org.objectweb.asm.Opcodes}). This parameter
* also indicates if the field is synthetic and/or deprecated.
* @param name the field's name.
* @param descriptor the field's descriptor (see {@link org.objectweb.asm.Type}).
* @param signature the field's signature.
* @param value the field's initial value. This parameter, which may be {@literal null} if the
* field does not have an initial value, must be an {@link Integer}, a {@link Float}, a {@link
* Long}, a {@link Double} or a {@link String}.
*/
public FieldNode(
final int api,
final int access,
final String name,
final String descriptor,
final String signature,
final Object value) {
super(api);
this.access = access;
this.name = name;
this.desc = descriptor;
this.signature = signature;
this.value = value;
}
// -----------------------------------------------------------------------------------------------
// Implementation of the FieldVisitor abstract class
// -----------------------------------------------------------------------------------------------
@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 visitEnd() {
// Nothing to do.
}
// -----------------------------------------------------------------------------------------------
// Accept methods
// -----------------------------------------------------------------------------------------------
/**
* Checks that this field 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.ASM4) {
if (visibleTypeAnnotations != null && !visibleTypeAnnotations.isEmpty()) {
throw new UnsupportedClassVersionException();
}
if (invisibleTypeAnnotations != null && !invisibleTypeAnnotations.isEmpty()) {
throw new UnsupportedClassVersionException();
}
}
}
/**
* Makes the given class visitor visit this field.
*
* @param classVisitor a class visitor.
*/
public void accept(final ClassVisitor classVisitor) {
FieldVisitor fieldVisitor = classVisitor.visitField(access, name, desc, signature, value);
if (fieldVisitor == null) {
return;
}
// Visit the annotations.
if (visibleAnnotations != null) {
for (int i = 0, n = visibleAnnotations.size(); i < n; ++i) {
AnnotationNode annotation = visibleAnnotations.get(i);
annotation.accept(fieldVisitor.visitAnnotation(annotation.desc, true));
}
}
if (invisibleAnnotations != null) {
for (int i = 0, n = invisibleAnnotations.size(); i < n; ++i) {
AnnotationNode annotation = invisibleAnnotations.get(i);
annotation.accept(fieldVisitor.visitAnnotation(annotation.desc, false));
}
}
if (visibleTypeAnnotations != null) {
for (int i = 0, n = visibleTypeAnnotations.size(); i < n; ++i) {
TypeAnnotationNode typeAnnotation = visibleTypeAnnotations.get(i);
typeAnnotation.accept(
fieldVisitor.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(
fieldVisitor.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) {
fieldVisitor.visitAttribute(attrs.get(i));
}
}
fieldVisitor.visitEnd();
}
}
