| /*** |
| * ASM: a very small and fast Java bytecode manipulation framework |
| * Copyright (c) 2000-2011 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 org.objectweb.asm.optimizer; |
| |
| import java.util.HashMap; |
| |
| import org.objectweb.asm.Handle; |
| import org.objectweb.asm.Opcodes; |
| import org.objectweb.asm.Type; |
| |
| /** |
| * A constant pool. |
| * |
| * @author Eric Bruneton |
| */ |
| public class ConstantPool extends HashMap<Constant, Constant> { |
| |
| private final Constant key1 = new Constant(); |
| |
| private final Constant key2 = new Constant(); |
| |
| private final Constant key3 = new Constant(); |
| |
| private final Constant key4 = new Constant(); |
| |
| private final Constant key5 = 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 newMethodType(final String methodDescriptor) { |
| key2.set('t', methodDescriptor, null, null); |
| Constant result = get(key2); |
| if (result == null) { |
| newUTF8(methodDescriptor); |
| result = new Constant(key2); |
| put(result); |
| } |
| return result; |
| } |
| |
| public Constant newHandle(final int tag, final String owner, |
| final String name, final String desc) { |
| key4.set((char) ('h' - 1 + tag), owner, name, desc); |
| Constant result = get(key4); |
| if (result == null) { |
| if (tag <= Opcodes.H_PUTSTATIC) { |
| newField(owner, name, desc); |
| } else { |
| newMethod(owner, name, desc, tag == Opcodes.H_INVOKEINTERFACE); |
| } |
| result = new Constant(key4); |
| 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; |
| int s = t.getSort(); |
| if (s == Type.OBJECT) { |
| return newClass(t.getInternalName()); |
| } else if (s == Type.METHOD) { |
| return newMethodType(t.getDescriptor()); |
| } else { // s == primitive type or array |
| return newClass(t.getDescriptor()); |
| } |
| } else if (cst instanceof Handle) { |
| Handle h = (Handle) cst; |
| return newHandle(h.getTag(), h.getOwner(), h.getName(), h.getDesc()); |
| } 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 newInvokeDynamic(String name, String desc, Handle bsm, |
| Object... bsmArgs) { |
| key5.set(name, desc, bsm, bsmArgs); |
| Constant result = get(key5); |
| if (result == null) { |
| newNameType(name, desc); |
| newHandle(bsm.getTag(), bsm.getOwner(), bsm.getName(), |
| bsm.getDesc()); |
| for (int i = 0; i < bsmArgs.length; i++) { |
| newConst(bsmArgs[i]); |
| } |
| result = new Constant(key5); |
| 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 get((Object) key); |
| } |
| |
| private void put(final Constant cst) { |
| put(cst, cst); |
| } |
| } |