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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.Opcodes;
/**
* A node that represents an annotation.
*
* @author Eric Bruneton
*/
public class AnnotationNode extends AnnotationVisitor {
/** The class descriptor of the annotation class. */
public String desc;
/**
* The name value pairs of this annotation. Each name value pair is stored as two consecutive
* elements in the list. The name is a {@link String}, and the value may be a {@link Byte}, {@link
* Boolean}, {@link Character}, {@link Short}, {@link Integer}, {@link Long}, {@link Float},
* {@link Double}, {@link String} or {@link org.objectweb.asm.Type}, or a two elements String
* array (for enumeration values), an {@link AnnotationNode}, or a {@link List} of values of one
* of the preceding types. The list may be {@literal null} if there is no name value pair.
*/
public List<Object> values;
/**
* Constructs a new {@link AnnotationNode}. <i>Subclasses must not use this constructor</i>.
* Instead, they must use the {@link #AnnotationNode(int, String)} version.
*
* @param descriptor the class descriptor of the annotation class.
* @throws IllegalStateException If a subclass calls this constructor.
*/
public AnnotationNode(final String descriptor) {
this(/* latest api = */ Opcodes.ASM9, descriptor);
if (getClass() != AnnotationNode.class) {
throw new IllegalStateException();
}
}
/**
* Constructs a new {@link AnnotationNode}.
*
* @param api the ASM API version implemented by this visitor. Must be one of the {@code
* ASM}<i>x</i> values in {@link Opcodes}.
* @param descriptor the class descriptor of the annotation class.
*/
public AnnotationNode(final int api, final String descriptor) {
super(api);
this.desc = descriptor;
}
/**
* Constructs a new {@link AnnotationNode} to visit an array value.
*
* @param values where the visited values must be stored.
*/
AnnotationNode(final List<Object> values) {
super(/* latest api = */ Opcodes.ASM9);
this.values = values;
}
// ------------------------------------------------------------------------
// Implementation of the AnnotationVisitor abstract class
// ------------------------------------------------------------------------
@Override
public void visit(final String name, final Object value) {
if (values == null) {
values = new ArrayList<>(this.desc != null ? 2 : 1);
}
if (this.desc != null) {
values.add(name);
}
if (value instanceof byte[]) {
values.add(Util.asArrayList((byte[]) value));
} else if (value instanceof boolean[]) {
values.add(Util.asArrayList((boolean[]) value));
} else if (value instanceof short[]) {
values.add(Util.asArrayList((short[]) value));
} else if (value instanceof char[]) {
values.add(Util.asArrayList((char[]) value));
} else if (value instanceof int[]) {
values.add(Util.asArrayList((int[]) value));
} else if (value instanceof long[]) {
values.add(Util.asArrayList((long[]) value));
} else if (value instanceof float[]) {
values.add(Util.asArrayList((float[]) value));
} else if (value instanceof double[]) {
values.add(Util.asArrayList((double[]) value));
} else {
values.add(value);
}
}
@Override
public void visitEnum(final String name, final String descriptor, final String value) {
if (values == null) {
values = new ArrayList<>(this.desc != null ? 2 : 1);
}
if (this.desc != null) {
values.add(name);
}
values.add(new String[] {descriptor, value});
}
@Override
public AnnotationVisitor visitAnnotation(final String name, final String descriptor) {
if (values == null) {
values = new ArrayList<>(this.desc != null ? 2 : 1);
}
if (this.desc != null) {
values.add(name);
}
AnnotationNode annotation = new AnnotationNode(descriptor);
values.add(annotation);
return annotation;
}
@Override
public AnnotationVisitor visitArray(final String name) {
if (values == null) {
values = new ArrayList<>(this.desc != null ? 2 : 1);
}
if (this.desc != null) {
values.add(name);
}
List<Object> array = new ArrayList<>();
values.add(array);
return new AnnotationNode(array);
}
@Override
public void visitEnd() {
// Nothing to do.
}
// ------------------------------------------------------------------------
// Accept methods
// ------------------------------------------------------------------------
/**
* Checks that this annotation 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}<i>x</i> values in {@link
* Opcodes}.
*/
public void check(final int api) {
// nothing to do
}
/**
* Makes the given visitor visit this annotation.
*
* @param annotationVisitor an annotation visitor. Maybe {@literal null}.
*/
public void accept(final AnnotationVisitor annotationVisitor) {
if (annotationVisitor != null) {
if (values != null) {
for (int i = 0, n = values.size(); i < n; i += 2) {
String name = (String) values.get(i);
Object value = values.get(i + 1);
accept(annotationVisitor, name, value);
}
}
annotationVisitor.visitEnd();
}
}
/**
* Makes the given visitor visit a given annotation value.
*
* @param annotationVisitor an annotation visitor. Maybe {@literal null}.
* @param name the value name.
* @param value the actual value.
*/
static void accept(
final AnnotationVisitor annotationVisitor, final String name, final Object value) {
if (annotationVisitor != null) {
if (value instanceof String[]) {
String[] typeValue = (String[]) value;
annotationVisitor.visitEnum(name, typeValue[0], typeValue[1]);
} else if (value instanceof AnnotationNode) {
AnnotationNode annotationValue = (AnnotationNode) value;
annotationValue.accept(annotationVisitor.visitAnnotation(name, annotationValue.desc));
} else if (value instanceof List) {
AnnotationVisitor arrayAnnotationVisitor = annotationVisitor.visitArray(name);
if (arrayAnnotationVisitor != null) {
List<?> arrayValue = (List<?>) value;
for (int i = 0, n = arrayValue.size(); i < n; ++i) {
accept(arrayAnnotationVisitor, null, arrayValue.get(i));
}
arrayAnnotationVisitor.visitEnd();
}
} else {
annotationVisitor.visit(name, value);
}
}
}
}
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