/***
* ASM: a very small and fast Java bytecode manipulation framework
* Copyright (c) 2000-2007 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 br.com.caelum.vraptor.asm.optimizer;
import java.util.HashMap;
import br.com.caelum.vraptor.asm.Type;
/**
* A constant pool.
*
* @author Eric Bruneton
*/
@SuppressWarnings({ "unchecked", "serial" })
public class ConstantPool extends HashMap {
private final Constant key1 = new Constant();
private final Constant key2 = new Constant();
private final Constant key3 = new Constant();
public Constant newInteger(final int value) {
key1.set(value);
Constant result = get(key1);
if (result == null) {
result = new Constant(key1);
put(result);
}
return result;
}
public Constant newFloat(final float value) {
key1.set(value);
Constant result = get(key1);
if (result == null) {
result = new Constant(key1);
put(result);
}
return result;
}
public Constant newLong(final long value) {
key1.set(value);
Constant result = get(key1);
if (result == null) {
result = new Constant(key1);
put(result);
}
return result;
}
public Constant newDouble(final double value) {
key1.set(value);
Constant result = get(key1);
if (result == null) {
result = new Constant(key1);
put(result);
}
return result;
}
public Constant newUTF8(final String value) {
key1.set('s', value, null, null);
Constant result = get(key1);
if (result == null) {
result = new Constant(key1);
put(result);
}
return result;
}
private Constant newString(final String value) {
key2.set('S', value, null, null);
Constant result = get(key2);
if (result == null) {
newUTF8(value);
result = new Constant(key2);
put(result);
}
return result;
}
public Constant newClass(final String value) {
key2.set('C', value, null, null);
Constant result = get(key2);
if (result == null) {
newUTF8(value);
result = new Constant(key2);
put(result);
}
return result;
}
public Constant newConst(final Object cst) {
if (cst instanceof Integer) {
int val = ((Integer) cst).intValue();
return newInteger(val);
} else if (cst instanceof Float) {
float val = ((Float) cst).floatValue();
return newFloat(val);
} else if (cst instanceof Long) {
long val = ((Long) cst).longValue();
return newLong(val);
} else if (cst instanceof Double) {
double val = ((Double) cst).doubleValue();
return newDouble(val);
} else if (cst instanceof String) {
return newString((String) cst);
} else if (cst instanceof Type) {
Type t = (Type) cst;
return newClass(t.getSort() == Type.OBJECT
? t.getInternalName()
: t.getDescriptor());
} else {
throw new IllegalArgumentException("value " + cst);
}
}
public Constant newField(
final String owner,
final String name,
final String desc)
{
key3.set('G', owner, name, desc);
Constant result = get(key3);
if (result == null) {
newClass(owner);
newNameType(name, desc);
result = new Constant(key3);
put(result);
}
return result;
}
public Constant newMethod(
final String owner,
final String name,
final String desc,
final boolean itf)
{
key3.set(itf ? 'N' : 'M', owner, name, desc);
Constant result = get(key3);
if (result == null) {
newClass(owner);
newNameType(name, desc);
result = new Constant(key3);
put(result);
}
return result;
}
public Constant newNameType(final String name, final String desc) {
key2.set('T', name, desc, null);
Constant result = get(key2);
if (result == null) {
newUTF8(name);
newUTF8(desc);
result = new Constant(key2);
put(result);
}
return result;
}
private Constant get(final Constant key) {
return (Constant) get((Object) key);
}
private void put(final Constant cst) {
put(cst, cst);
}
}