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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.java.decompiler.struct.consts;
import java.io.DataOutputStream;
import java.io.IOException;
/*
* NameAndType, FieldRef, MethodRef, InterfaceMethodref
* InvokeDynamic, MethodHandle
*/
public class LinkConstant extends PooledConstant {
// *****************************************************************************
// public fields
// *****************************************************************************
public int index1, index2;
public String classname;
public String elementname;
public String descriptor;
public int paramCount = 0;
public boolean isVoid = false;
public boolean returnCategory2 = false;
// *****************************************************************************
// constructors
// *****************************************************************************
public LinkConstant(int type, String classname, String elementname, String descriptor) {
this.type = type;
this.classname = classname;
this.elementname = elementname;
this.descriptor = descriptor;
initConstant();
}
public LinkConstant(int type, int index1, int index2) {
this.type = type;
this.index1 = index1;
this.index2 = index2;
}
// *****************************************************************************
// public methods
// *****************************************************************************
public void resolveConstant(ConstantPool pool) {
if (type == CONSTANT_NameAndType) {
elementname = pool.getPrimitiveConstant(index1).getString();
descriptor = pool.getPrimitiveConstant(index2).getString();
}
else if (type == CONSTANT_MethodHandle) {
LinkConstant ref_info = pool.getLinkConstant(index2);
classname = ref_info.classname;
elementname = ref_info.elementname;
descriptor = ref_info.descriptor;
}
else {
if (type != CONSTANT_InvokeDynamic) {
classname = pool.getPrimitiveConstant(index1).getString();
}
LinkConstant nametype = pool.getLinkConstant(index2);
elementname = nametype.elementname;
descriptor = nametype.descriptor;
}
initConstant();
}
public void writeToStream(DataOutputStream out) throws IOException {
out.writeByte(type);
if (type == CONSTANT_MethodHandle) {
out.writeByte(index1);
}
else {
out.writeShort(index1);
}
out.writeShort(index2);
}
public boolean equals(Object o) {
if (o == this) return true;
if (o == null || !(o instanceof LinkConstant)) return false;
LinkConstant cn = (LinkConstant)o;
return this.type == cn.type &&
this.elementname.equals(cn.elementname) &&
this.descriptor.equals(cn.descriptor) &&
(this.type != CONSTANT_NameAndType || this.classname.equals(cn.classname));
}
// *****************************************************************************
// private methods
// *****************************************************************************
private void initConstant() {
if (type == CONSTANT_Methodref ||
type == CONSTANT_InterfaceMethodref ||
type == CONSTANT_InvokeDynamic ||
type == CONSTANT_MethodHandle) {
resolveDescriptor(descriptor);
}
else if (type == CONSTANT_Fieldref) {
returnCategory2 = ("D".equals(descriptor) || "J".equals(descriptor));
}
}
private void resolveDescriptor(String descr) {
String[] arr = descr.split("[()]");
String par = arr[1];
int index = 0, counter = 0;
int len = par.length();
while (index < len) {
char c = par.charAt(index);
if (c == 'L') {
index = par.indexOf(";", index);
}
else if (c == '[') {
index++;
continue;
}
counter++;
index++;
}
paramCount = counter;
isVoid = "V".equals(arr[2]);
returnCategory2 = ("D".equals(arr[2]) || "J".equals(arr[2]));
}
}
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