/*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html.
*
* This file is a derivative of code released under the terms listed below.
*
*/
/*
*
* Copyright (c) 2009-2012,
*
* Jonathan Bardin <astrosus@gmail.com>
* Steve Suh <suhsteve@gmail.com>
*
* 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. The names of the contributors may not 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 com.ibm.wala.dalvik.classLoader;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import com.ibm.wala.dalvik.dex.instructions.Instruction;
/**
* Collection of Instruction wich allow to get an instruction from its table
* index id or from its bytecode index.
* It's not allowed to remove an element.
*
*/
public class InstructionArray implements Collection<Instruction> {
List<Instruction> instructions;
Map<Integer, Integer> pc2index;
List<Integer> index2pc;
public InstructionArray() {
instructions = new ArrayList<Instruction>();
pc2index = new HashMap<Integer, Integer>();
index2pc = new ArrayList<Integer>();
}
public boolean add(Instruction e) {
boolean ret = instructions.add(e);
if (ret) {
pc2index.put(e.pc, size() - 1);
index2pc.add(e.pc);
}
return ret;
}
public boolean addAll(Collection<? extends Instruction> c) {
boolean ret = false;
for (Instruction instruction : c) {
ret |= add(instruction);
}
return ret;
}
public boolean contains(Object o) {
return instructions.contains(o);
}
public boolean containsAll(Collection<?> c) {
return instructions.containsAll(c);
}
public boolean equals(Object o) {
return instructions.equals(o);
}
public int hashCode() {
return instructions.hashCode();
}
public int indexOf(Object o) {
return instructions.indexOf(o);
}
public boolean isEmpty() {
return instructions.isEmpty();
}
public Iterator<Instruction> iterator() {
return instructions.iterator();
}
public void clear() {
throw new UnsupportedOperationException();
}
public boolean remove(Object o) {
throw new UnsupportedOperationException();
}
public boolean removeAll(Collection<?> c) {
throw new UnsupportedOperationException();
}
public boolean retainAll(Collection<?> c) {
throw new UnsupportedOperationException();
}
public int size() {
return instructions.size();
}
public Object[] toArray() {
return instructions.toArray();
}
public <T> T[] toArray(T[] a) {
return instructions.toArray(a);
}
/**
* @param pc
* the byte code index.
* @return The index of the instruction of given byte code index
*/
public int getIndexFromPc(int pc) {
return pc2index.get(pc);
}
/**
* @param index
* the instruction index.
* @return The byte code address of the instruction index
*/
public int getPcFromIndex(int index) {
return index2pc.get(index);
}
/**
* @param id
* @return The instruction from its id.
*/
public Instruction getFromId(int id) {
return instructions.get(id);
}
/**
* @param pc
* @return The instruction from its pc.
*/
public Instruction getFromPc(int pc) {
return instructions.get(pc2index.get(pc));
}
}