/*******************************************************************************
* Copyright (c) 2007 IBM Corporation.
* All rights reserved. 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
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package com.ibm.wala.demandpa.util;
import com.ibm.wala.ipa.callgraph.CGNode;
/**
* *
* represents a single static occurrence of a memory access (i.e., an access to a field
* or to the contents of an array) in the code
*
* @author sfink
*/
public class MemoryAccess {
final private CGNode node;
/**
* index of the field access instruction in a shrikeBt or SSA instruction
* array
*/
final private int instructionIndex;
public MemoryAccess(int index, CGNode node) {
super();
instructionIndex = index;
this.node = node;
}
/**
* @return Returns the instructionIndex.
*/
public int getInstructionIndex() {
return instructionIndex;
}
@Override
public String toString() {
return "MemAccess: " + getNode() + ":" + getInstructionIndex();
}
/**
* @return Returns the node.
*/
public CGNode getNode() {
return node;
}
@Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + instructionIndex;
result = prime * result + ((node == null) ? 0 : node.hashCode());
return result;
}
@Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
MemoryAccess other = (MemoryAccess) obj;
if (instructionIndex != other.instructionIndex)
return false;
if (node == null) {
if (other.node != null)
return false;
} else if (!node.equals(other.node))
return false;
return true;
}
}