/*
* This file is part of JOP, the Java Optimized Processor
* see <http://www.jopdesign.com/>
*
* Copyright (C) 2010, Stefan Hepp (stefan@stefant.org).
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.jopdesign.common.bcel;
import org.apache.bcel.classfile.ConstantPool;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
/**
* Just for me, because the formatting in the JVM spec is horrible ..
*
* annotation {
* u2 type_index;
* u2 num_element_value_pairs;
* {
* u2 element_name_index;
* element_value value;
* } element_value_pairs[num_element_value_pairs];
* }
*
* element_value {
* u1 tag;
* union {
* u2 const_value_index;
* {
* u2 type_name_index;
* u2 const_name_index;
* } enum_const_value;
* u2 class_info_index;
* annotation annotation_value;
* {
* u2 num_values;
* element_value values[num_values];
* } array_value;
* } value;
* }
*
* @author Stefan Hepp (stefan@stefant.org)
*/
public class AnnotationElementValue {
private byte tag;
private ConstantPool constantPool;
private short constValueIndex;
private short typeNameIndex;
private short constNameIndex;
private short classInfoIndex;
private Annotation annotation;
private List<AnnotationElementValue> arrayValue;
public static AnnotationElementValue createValue(DataInputStream in, ConstantPool cp) throws IOException {
byte tag = in.readByte();
switch (tag) {
case 'B':
case 'C':
case 'D':
case 'F':
case 'T':
case 'J':
case 'S':
case 'Z':
case 's':
short constValueIndex = in.readShort();
return new AnnotationElementValue(tag, cp, constValueIndex);
case 'e':
short typeNameIndex = in.readShort();
short constNameIndex = in.readShort();
return new AnnotationElementValue(tag, cp, typeNameIndex, constNameIndex);
case 'c':
short classInfoIndex = in.readShort();
return new AnnotationElementValue(tag, cp, classInfoIndex);
case '@':
Annotation annotation = Annotation.createAnnotation(in, cp);
return new AnnotationElementValue(tag, cp, annotation);
case '[':
short numValues = in.readShort();
List<AnnotationElementValue> arrayValue = new ArrayList<AnnotationElementValue>(numValues);
for (int i = 0; i < numValues; i++) {
arrayValue.add( createValue(in, cp) );
}
return new AnnotationElementValue(tag, cp, arrayValue);
default:
throw new UnsupportedOperationException("Annotation element value tag "+((char)tag)+" not supported");
}
}
public AnnotationElementValue(byte tag, ConstantPool constantPool, short index) {
this.tag = tag;
this.constantPool = constantPool;
if (tag == 'c') {
this.classInfoIndex = index;
} else {
this.constValueIndex = index;
}
}
public AnnotationElementValue(byte tag, ConstantPool constantPool, short typeNameIndex, short constNameIndex) {
this.tag = tag;
this.constantPool = constantPool;
this.typeNameIndex = typeNameIndex;
this.constNameIndex = constNameIndex;
}
public AnnotationElementValue(byte tag, ConstantPool constantPool, List<AnnotationElementValue> arrayValue) {
this.tag = tag;
this.constantPool = constantPool;
this.arrayValue = arrayValue;
}
public AnnotationElementValue(byte tag, ConstantPool constantPool, Annotation annotation) {
this.tag = tag;
this.constantPool = constantPool;
this.annotation = annotation;
}
public byte getTag() {
return tag;
}
public void setTag(byte tag) {
this.tag = tag;
}
public ConstantPool getConstantPool() {
return constantPool;
}
public void setConstantPool(ConstantPool constantPool) {
this.constantPool = constantPool;
}
public short getConstValueIndex() {
return constValueIndex;
}
public void setConstValueIndex(short constValueIndex) {
this.constValueIndex = constValueIndex;
}
public boolean isConstValue() {
return tag == 'B' || tag == 'C' || tag == 'D' || tag == 'F' || tag == 'T' ||
tag == 'J' || tag == 'S' || tag == 'Z' || tag == 's';
}
public boolean isClassValue() {
return tag == 'c';
}
public boolean isEnumValue() {
return tag == 'e';
}
public boolean isAnnotationValue() {
return tag == '@';
}
public boolean isArrayValue() {
return tag == '[';
}
public int length() {
switch (tag) {
case 'B':
case 'C':
case 'D':
case 'F':
case 'T':
case 'J':
case 'S':
case 'Z':
case 's':
return 3;
case 'e':
return 5;
case 'c':
return 3;
case '@':
return 1 + annotation.length();
case '[':
int length = 3; // tag + num_values
for (AnnotationElementValue ev : arrayValue) {
length += ev.length();
}
return length;
default:
throw new UnsupportedOperationException("Annotation element value tag "+((char)tag)+" not supported");
}
}
public void dump(DataOutputStream out) throws IOException {
out.writeByte(tag);
switch (tag) {
case 'B':
case 'C':
case 'D':
case 'F':
case 'T':
case 'J':
case 'S':
case 'Z':
case 's':
out.writeShort(constValueIndex);
return;
case 'e':
out.writeShort(typeNameIndex);
out.writeShort(constNameIndex);
return;
case 'c':
out.writeShort(classInfoIndex);
return;
case '@':
annotation.dump(out);
return;
case '[':
out.writeShort(arrayValue.size());
for (AnnotationElementValue ev : arrayValue) {
ev.dump(out);
}
return;
default:
throw new UnsupportedOperationException("Annotation element value tag "+((char)tag)+" not supported");
}
}
public AnnotationElementValue copy() {
return null;
}
}