/*******************************************************************************
 * 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.ipa.callgraph.propagation.rta;

import com.ibm.wala.classLoader.IClass;
import com.ibm.wala.ipa.callgraph.propagation.PointerKey;
import com.ibm.wala.types.Selector;
import com.ibm.wala.util.debug.Assertions;
import com.ibm.wala.util.debug.UnimplementedError;

/**
 * This RTA implementation tracks a single set of Classes for each Selector
 */
public class RTASelectorKey implements PointerKey {

  private final Selector selector;

  RTASelectorKey(Selector selector) {
    this.selector = selector;
  }

  @Override
  public int hashCode() {
    return 131 * selector.hashCode();
  }

  @Override
  public boolean equals(Object arg0) {
    if (arg0 == null) {
      return false;
    }
    if (arg0.getClass().equals(getClass())) {
      RTASelectorKey other = (RTASelectorKey) arg0;
      return selector.equals(other.selector);
    } else {
      return false;
    }
  }

  @Override
  public String toString() {
    return "RTAKey:" + selector.toString();
  }

  /*
   * @see com.ibm.wala.ipa.callgraph.propagation.PointerKey#getTypeFilter()
   */
  public IClass getTypeFilter() throws UnimplementedError {
    Assertions.UNREACHABLE();
    return null;
  }

}
