SimpleElementValueGen.java
/*
* 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.generic;
import java.io.DataOutputStream;
import java.io.IOException;
import org.apache.bcel.classfile.ConstantDouble;
import org.apache.bcel.classfile.ConstantFloat;
import org.apache.bcel.classfile.ConstantInteger;
import org.apache.bcel.classfile.ConstantLong;
import org.apache.bcel.classfile.ConstantUtf8;
import org.apache.bcel.classfile.ElementValue;
import org.apache.bcel.classfile.SimpleElementValue;
/**
* @since 6.0
*/
public class SimpleElementValueGen extends ElementValueGen {
// For primitive types and string type, this points to the value entry in
// the cpGen
// For 'class' this points to the class entry in the cpGen
private final int idx;
public SimpleElementValueGen(final int type, final ConstantPoolGen cpGen, final boolean value) {
super(type, cpGen);
if (value) {
idx = getConstantPool().addInteger(1);
} else {
idx = getConstantPool().addInteger(0);
}
}
public SimpleElementValueGen(final int type, final ConstantPoolGen cpGen, final byte value) {
super(type, cpGen);
idx = getConstantPool().addInteger(value);
}
public SimpleElementValueGen(final int type, final ConstantPoolGen cpGen, final char value) {
super(type, cpGen);
idx = getConstantPool().addInteger(value);
}
public SimpleElementValueGen(final int type, final ConstantPoolGen cpGen, final double value) {
super(type, cpGen);
idx = getConstantPool().addDouble(value);
}
public SimpleElementValueGen(final int type, final ConstantPoolGen cpGen, final float value) {
super(type, cpGen);
idx = getConstantPool().addFloat(value);
}
public SimpleElementValueGen(final int type, final ConstantPoolGen cpGen, final int value) {
super(type, cpGen);
idx = getConstantPool().addInteger(value);
}
public SimpleElementValueGen(final int type, final ConstantPoolGen cpGen, final long value) {
super(type, cpGen);
idx = getConstantPool().addLong(value);
}
public SimpleElementValueGen(final int type, final ConstantPoolGen cpGen, final short value) {
super(type, cpGen);
idx = getConstantPool().addInteger(value);
}
public SimpleElementValueGen(final int type, final ConstantPoolGen cpGen, final String value) {
super(type, cpGen);
idx = getConstantPool().addUtf8(value);
}
// ctors for each supported type... type could be inferred but for now lets
// force it to be passed
/**
* Protected ctor used for deserialization, doesn't *put* an entry in the constant pool, assumes the one at the supplied
* index is correct.
*/
protected SimpleElementValueGen(final int type, final int idx, final ConstantPoolGen cpGen) {
super(type, cpGen);
this.idx = idx;
}
/**
* The boolean controls whether we copy info from the 'old' constant pool to the 'new'. You need to use this ctor if the
* annotation is being copied from one file to another.
*/
public SimpleElementValueGen(final SimpleElementValue value, final ConstantPoolGen cpool, final boolean copyPoolEntries) {
super(value.getElementValueType(), cpool);
if (!copyPoolEntries) {
// J5ASSERT: Could assert value.stringifyValue() is the same as
// cpool.getConstant(SimpleElementValuevalue.getIndex())
idx = value.getIndex();
} else {
switch (value.getElementValueType()) {
case STRING:
idx = cpool.addUtf8(value.getValueString());
break;
case PRIMITIVE_INT:
idx = cpool.addInteger(value.getValueInt());
break;
case PRIMITIVE_BYTE:
idx = cpool.addInteger(value.getValueByte());
break;
case PRIMITIVE_CHAR:
idx = cpool.addInteger(value.getValueChar());
break;
case PRIMITIVE_LONG:
idx = cpool.addLong(value.getValueLong());
break;
case PRIMITIVE_FLOAT:
idx = cpool.addFloat(value.getValueFloat());
break;
case PRIMITIVE_DOUBLE:
idx = cpool.addDouble(value.getValueDouble());
break;
case PRIMITIVE_BOOLEAN:
if (value.getValueBoolean()) {
idx = cpool.addInteger(1);
} else {
idx = cpool.addInteger(0);
}
break;
case PRIMITIVE_SHORT:
idx = cpool.addInteger(value.getValueShort());
break;
default:
throw new IllegalArgumentException("SimpleElementValueGen class does not know how to copy this type " + super.getElementValueType());
}
}
}
@Override
public void dump(final DataOutputStream dos) throws IOException {
dos.writeByte(super.getElementValueType()); // u1 kind of value
switch (super.getElementValueType()) {
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(idx);
break;
default:
throw new IllegalStateException("SimpleElementValueGen doesn't know how to write out type " + super.getElementValueType());
}
}
/**
* Return immutable variant
*/
@Override
public ElementValue getElementValue() {
return new SimpleElementValue(super.getElementValueType(), idx, getConstantPool().getConstantPool());
}
public int getIndex() {
return idx;
}
public int getValueInt() {
if (super.getElementValueType() != PRIMITIVE_INT) {
throw new IllegalStateException("Don't call getValueString() on a non STRING ElementValue");
}
final ConstantInteger c = (ConstantInteger) getConstantPool().getConstant(idx);
return c.getBytes();
}
public String getValueString() {
if (super.getElementValueType() != STRING) {
throw new IllegalStateException("Don't call getValueString() on a non STRING ElementValue");
}
final ConstantUtf8 c = (ConstantUtf8) getConstantPool().getConstant(idx);
return c.getBytes();
}
// Whatever kind of value it is, return it as a string
@Override
public String stringifyValue() {
switch (super.getElementValueType()) {
case PRIMITIVE_INT:
final ConstantInteger c = (ConstantInteger) getConstantPool().getConstant(idx);
return Integer.toString(c.getBytes());
case PRIMITIVE_LONG:
final ConstantLong j = (ConstantLong) getConstantPool().getConstant(idx);
return Long.toString(j.getBytes());
case PRIMITIVE_DOUBLE:
final ConstantDouble d = (ConstantDouble) getConstantPool().getConstant(idx);
return Double.toString(d.getBytes());
case PRIMITIVE_FLOAT:
final ConstantFloat f = (ConstantFloat) getConstantPool().getConstant(idx);
return Float.toString(f.getBytes());
case PRIMITIVE_SHORT:
final ConstantInteger s = (ConstantInteger) getConstantPool().getConstant(idx);
return Integer.toString(s.getBytes());
case PRIMITIVE_BYTE:
final ConstantInteger b = (ConstantInteger) getConstantPool().getConstant(idx);
return Integer.toString(b.getBytes());
case PRIMITIVE_CHAR:
final ConstantInteger ch = (ConstantInteger) getConstantPool().getConstant(idx);
return Integer.toString(ch.getBytes());
case PRIMITIVE_BOOLEAN:
final ConstantInteger bo = (ConstantInteger) getConstantPool().getConstant(idx);
if (bo.getBytes() == 0) {
return "false";
}
return "true";
case STRING:
final ConstantUtf8 cu8 = (ConstantUtf8) getConstantPool().getConstant(idx);
return cu8.getBytes();
default:
throw new IllegalStateException("SimpleElementValueGen class does not know how to stringify type " + super.getElementValueType());
}
}
}