/*******************************************************************************
* Copyright (c) 2002 - 2006 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.util.graph.impl;
import com.ibm.wala.util.debug.Assertions;
import com.ibm.wala.util.debug.UnimplementedError;
import com.ibm.wala.util.graph.INodeWithNumberedEdges;
import com.ibm.wala.util.intset.BimodalMutableIntSet;
import com.ibm.wala.util.intset.IntSet;
/**
* Simple implementation of {@link INodeWithNumberedEdges}
*/
public class NodeWithNumberedEdges extends NodeWithNumber implements INodeWithNumberedEdges {
private BimodalMutableIntSet predNumbers;
private BimodalMutableIntSet succNumbers;
@Override
public IntSet getSuccNumbers() {
return succNumbers;
}
@Override
public IntSet getPredNumbers() {
return predNumbers;
}
/**
* Note that this variable appears on the RHS of an equation.
*
* @param eqNumber
* the equation number
*/
@Override
public void addSucc(int eqNumber) {
if (succNumbers == null) {
succNumbers = new BimodalMutableIntSet();
succNumbers.add(eqNumber);
} else {
succNumbers.add(eqNumber);
}
}
/**
* Note that this variable appears on the LHS of an equation.
*
* @param eqNumber
* the equation number
*/
@Override
public void addPred(int eqNumber) {
if (predNumbers == null) {
predNumbers = new BimodalMutableIntSet();
predNumbers.add(eqNumber);
} else {
predNumbers.add(eqNumber);
}
}
/**
* remove the edge that indicates this variable is Succd by a certain equation
*
* @param eqNumber
*/
public void deleteSucc(int eqNumber) {
if (succNumbers != null) {
succNumbers.remove(eqNumber);
if (succNumbers.size() == 0) {
succNumbers = null;
}
}
}
/**
* remove the edge that indicates this variable is Predined by a certain
* equation
*
* @param eqNumber
*/
public void deletePred(int eqNumber) {
if (predNumbers != null) {
predNumbers.remove(eqNumber);
if (predNumbers.size() == 0) {
predNumbers = null;
}
}
}
/*
* @see com.ibm.wala.util.graph.INodeWithNumberedEdges#removeAllIncidentEdges()
*/
@Override
public void removeAllIncidentEdges() throws UnimplementedError {
Assertions.UNREACHABLE("Implement me");
}
@Override
public void removeIncomingEdges() throws UnimplementedError {
Assertions.UNREACHABLE("Implement me");
}
@Override
public void removeOutgoingEdges() throws UnimplementedError {
Assertions.UNREACHABLE("Implement me");
}
}