org.apache.bcel.classfile.SimpleElementValue Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of bcel Show documentation
Show all versions of bcel Show documentation
Apache Commons Bytecode Engineering Library
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.bcel.classfile;
import java.io.DataOutputStream;
import java.io.IOException;
import org.apache.bcel.Const;
/**
* @since 6.0
*/
public class SimpleElementValue extends ElementValue
{
private int index;
public SimpleElementValue(final int type, final int index, final ConstantPool cpool)
{
super(type, cpool);
this.index = index;
}
/**
* @return Value entry index in the cpool
*/
public int getIndex()
{
return index;
}
public void setIndex(final int index)
{
this.index = index;
}
public String getValueString()
{
if (super.getType() != STRING) {
throw new RuntimeException(
"Dont call getValueString() on a non STRING ElementValue");
}
final ConstantUtf8 c = (ConstantUtf8) super.getConstantPool().getConstant(getIndex(),
Const.CONSTANT_Utf8);
return c.getBytes();
}
public int getValueInt()
{
if (super.getType() != PRIMITIVE_INT) {
throw new RuntimeException(
"Dont call getValueString() on a non STRING ElementValue");
}
final ConstantInteger c = (ConstantInteger) super.getConstantPool().getConstant(getIndex(),
Const.CONSTANT_Integer);
return c.getBytes();
}
public byte getValueByte()
{
if (super.getType() != PRIMITIVE_BYTE) {
throw new RuntimeException(
"Dont call getValueByte() on a non BYTE ElementValue");
}
final ConstantInteger c = (ConstantInteger) super.getConstantPool().getConstant(getIndex(),
Const.CONSTANT_Integer);
return (byte) c.getBytes();
}
public char getValueChar()
{
if (super.getType() != PRIMITIVE_CHAR) {
throw new RuntimeException(
"Dont call getValueChar() on a non CHAR ElementValue");
}
final ConstantInteger c = (ConstantInteger) super.getConstantPool().getConstant(getIndex(),
Const.CONSTANT_Integer);
return (char) c.getBytes();
}
public long getValueLong()
{
if (super.getType() != PRIMITIVE_LONG) {
throw new RuntimeException(
"Dont call getValueLong() on a non LONG ElementValue");
}
final ConstantLong j = (ConstantLong) super.getConstantPool().getConstant(getIndex());
return j.getBytes();
}
public float getValueFloat()
{
if (super.getType() != PRIMITIVE_FLOAT) {
throw new RuntimeException(
"Dont call getValueFloat() on a non FLOAT ElementValue");
}
final ConstantFloat f = (ConstantFloat) super.getConstantPool().getConstant(getIndex());
return f.getBytes();
}
public double getValueDouble()
{
if (super.getType() != PRIMITIVE_DOUBLE) {
throw new RuntimeException(
"Dont call getValueDouble() on a non DOUBLE ElementValue");
}
final ConstantDouble d = (ConstantDouble) super.getConstantPool().getConstant(getIndex());
return d.getBytes();
}
public boolean getValueBoolean()
{
if (super.getType() != PRIMITIVE_BOOLEAN) {
throw new RuntimeException(
"Dont call getValueBoolean() on a non BOOLEAN ElementValue");
}
final ConstantInteger bo = (ConstantInteger) super.getConstantPool().getConstant(getIndex());
return bo.getBytes() != 0;
}
public short getValueShort()
{
if (super.getType() != PRIMITIVE_SHORT) {
throw new RuntimeException(
"Dont call getValueShort() on a non SHORT ElementValue");
}
final ConstantInteger s = (ConstantInteger) super.getConstantPool().getConstant(getIndex());
return (short) s.getBytes();
}
@Override
public String toString()
{
return stringifyValue();
}
// Whatever kind of value it is, return it as a string
@Override
public String stringifyValue()
{
final ConstantPool cpool = super.getConstantPool();
final int _type = super.getType();
switch (_type)
{
case PRIMITIVE_INT:
final ConstantInteger c = (ConstantInteger) cpool.getConstant(getIndex(),
Const.CONSTANT_Integer);
return Integer.toString(c.getBytes());
case PRIMITIVE_LONG:
final ConstantLong j = (ConstantLong) cpool.getConstant(getIndex(),
Const.CONSTANT_Long);
return Long.toString(j.getBytes());
case PRIMITIVE_DOUBLE:
final ConstantDouble d = (ConstantDouble) cpool.getConstant(getIndex(),
Const.CONSTANT_Double);
return Double.toString(d.getBytes());
case PRIMITIVE_FLOAT:
final ConstantFloat f = (ConstantFloat) cpool.getConstant(getIndex(),
Const.CONSTANT_Float);
return Float.toString(f.getBytes());
case PRIMITIVE_SHORT:
final ConstantInteger s = (ConstantInteger) cpool.getConstant(getIndex(),
Const.CONSTANT_Integer);
return Integer.toString(s.getBytes());
case PRIMITIVE_BYTE:
final ConstantInteger b = (ConstantInteger) cpool.getConstant(getIndex(),
Const.CONSTANT_Integer);
return Integer.toString(b.getBytes());
case PRIMITIVE_CHAR:
final ConstantInteger ch = (ConstantInteger) cpool.getConstant(
getIndex(), Const.CONSTANT_Integer);
return String.valueOf((char)ch.getBytes());
case PRIMITIVE_BOOLEAN:
final ConstantInteger bo = (ConstantInteger) cpool.getConstant(
getIndex(), Const.CONSTANT_Integer);
if (bo.getBytes() == 0) {
return "false";
}
return "true";
case STRING:
final ConstantUtf8 cu8 = (ConstantUtf8) cpool.getConstant(getIndex(),
Const.CONSTANT_Utf8);
return cu8.getBytes();
default:
throw new RuntimeException("SimpleElementValue class does not know how to stringify type " + _type);
}
}
@Override
public void dump(final DataOutputStream dos) throws IOException
{
final int _type = super.getType();
dos.writeByte(_type); // u1 kind of value
switch (_type)
{
case PRIMITIVE_INT:
case PRIMITIVE_BYTE:
case PRIMITIVE_CHAR:
case PRIMITIVE_FLOAT:
case PRIMITIVE_LONG:
case PRIMITIVE_BOOLEAN:
case PRIMITIVE_SHORT:
case PRIMITIVE_DOUBLE:
case STRING:
dos.writeShort(getIndex());
break;
default:
throw new RuntimeException("SimpleElementValue doesnt know how to write out type " + _type);
}
}
}
© 2015 - 2025 Weber Informatics LLC | Privacy Policy