Source Code : Dual Key Hash Map

Java Is Open Source Programming Language You Can Download From Java and Java Libraries From http://www.oracle.com. Click Here to download
We provide this code related to title for you to solve your developing problem easily. Libraries which is import in this program you can download from http://www.oracle.com. Click Here or search from google with Libraries Name you get jar file related it

Dual Key Hash Map

      
/*
 * @(#)DualKeyHashMap.java  1.0 May 5, 2008
 *
 *  The MIT License
 *
 *  Copyright (c) 2008 Malachi de AElfweald <malachid@gmail.com>
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy
 *  of this software and associated documentation files (the "Software"), to deal
 *  in the Software without restriction, including without limitation the rights
 *  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 *  copies of the Software, and to permit persons to whom the Software is
 *  furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in
 *  all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *  THE SOFTWARE.
 */
//package org.eoti.util;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

public class DualKeyHashMap<XKEY, YKEY, VALUE> extends
    HashMap<DualKeyMap.DualKey<XKEY, YKEY>, VALUE> implements
    DualKeyMap<XKEY, YKEY, VALUE> {
  static class SimpleDualKey<XKEY, YKEY> implements DualKey<XKEY, YKEY> {
    protected XKEY xKey;
    protected YKEY yKey;

    public SimpleDualKey(XKEY xKey, YKEY yKey) {
      this.xKey = xKey;
      this.yKey = yKey;
    }

    public XKEY getXKey() {
      return xKey;
    }

    public YKEY getYKey() {
      return yKey;
    }

    public int hashCode() {
      return toString().hashCode();
    }

    public boolean equals(Object obj) {
      return hashCode() == obj.hashCode();
    }

    public String toString() {
      return String.format("[%s [xkey=%s][ykey=%s]", this.getClass()
          .getName(), xKey.toString(), yKey.toString());
    }
  }

  public DualKeyHashMap(int initialCapacity, float loadFactor) {
    super(initialCapacity, loadFactor);
  }

  public DualKeyHashMap(int initialCapacity) {
    super(initialCapacity);
  }

  public DualKeyHashMap() {
    super();
  }

  public DualKeyHashMap(Map<? extends DualKey<XKEY, YKEY>, ? extends VALUE> m) {
    super(m);
  }

  public boolean containsXKey(XKEY xKey) {
    for (DualKey<XKEY, YKEY> key : keySet()) {
      if (key.getXKey().equals(xKey))
        return true;
    }
    return false;
  }

  public boolean containsYKey(YKEY yKey) {
    for (DualKey<XKEY, YKEY> key : keySet()) {
      if (key.getYKey().equals(yKey))
        return true;
    }
    return false;
  }

  public VALUE get(XKEY xKey, YKEY yKey) {
    return super.get(new SimpleDualKey<XKEY, YKEY>(xKey, yKey));
  }

  public Set<XKEY> getXKeySet() {
    HashSet<XKEY> xKeys = new HashSet<XKEY>();
    for (DualKey<XKEY, YKEY> key : keySet())
      xKeys.add(key.getXKey());

    return xKeys;
  }

  public Set<YKEY> getYKeySet() {
    HashSet<YKEY> yKeys = new HashSet<YKEY>();
    for (DualKey<XKEY, YKEY> key : keySet())
      yKeys.add(key.getYKey());

    return yKeys;
  }

  public VALUE put(XKEY xKey, YKEY yKey, VALUE value) {
    return put(new SimpleDualKey<XKEY, YKEY>(xKey, yKey), value);
  }

  public void putAll(DualKeyMap<XKEY, YKEY, VALUE> map) {
    super.putAll(map);
  }

  public VALUE remove(XKEY xKey, YKEY yKey) {
    return remove(new SimpleDualKey<XKEY, YKEY>(xKey, yKey));
  }

}

interface DualKeyMap<XKEY, YKEY, VALUE> extends
    Map<DualKeyMap.DualKey<XKEY, YKEY>, VALUE> {
  static interface DualKey<XKEY, YKEY> {
    public XKEY getXKey();

    public YKEY getYKey();

    public int hashCode();

    public boolean equals(Object obj);
  }

  // static interface Entry<XKEY,YKEY,VALUE> extends Map.Entry<Key<XKEY,YKEY>,
  // VALUE>
  // public void clear();
  public boolean containsXKey(XKEY xKey);

  public boolean containsYKey(YKEY yKey);

  // public Set<Entry<XKEY,YKEY,VALUE>> entrySet();
  // public boolean equals(Object obj);
  public VALUE get(XKEY xKey, YKEY yKey);

  // public int hashCode();
  // public boolean isEmpty();
  public Set<XKEY> getXKeySet();

  public Set<YKEY> getYKeySet();

  public VALUE put(XKEY xKey, YKEY yKey, VALUE value);

  public void putAll(DualKeyMap<XKEY, YKEY, VALUE> map);

  public VALUE remove(XKEY xKey, YKEY yKey);
  // public int size();
  // public Collection<VALUE> values();
}

   
    
    
    
    
    
  

Thank with us