gr.abiss.calipso.dto.KeyValuePair.java Source code

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Here is the source code for gr.abiss.calipso.dto.KeyValuePair.java

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/*
 * Copyright (c) 2007 - 2010 Abiss.gr <info@abiss.gr>  
 *
 *  This file is part of Calipso, a software platform by www.Abiss.gr.
 *
 *  Calipso is free software: you can redistribute it and/or modify 
 *  it under the terms of the GNU Affero General Public License as published by 
 *  the Free Software Foundation, either version 3 of the License, or 
 *  (at your option) any later version.
 * 
 *  Calipso is distributed in the hope that it will be useful, 
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of 
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 *  GNU Affero General Public License for more details.
 * 
 *  You should have received a copy of the GNU General Public License 
 *  along with Calipso. If not, see http://www.gnu.org/licenses/agpl.html
 */

package gr.abiss.calipso.dto;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;

/**
 * Used mainly as an alternative to map entries
 */
public class KeyValuePair implements Comparable<KeyValuePair>, Serializable {

    private static final long serialVersionUID = 1L;
    private Serializable key;
    private Serializable value;

    public static List<KeyValuePair> fromMap(Map map) {
        ArrayList<KeyValuePair> list = null;
        if (map != null) {
            list = new ArrayList<KeyValuePair>(map.size());
            if (map != null) {
                for (Iterator iter = map.entrySet().iterator(); iter.hasNext();) {
                    Entry entry = (Entry) iter.next();
                    list.add(new KeyValuePair((Serializable) entry.getKey(), (Serializable) entry.getValue()));
                }
            }
        }
        return list;
    }

    public KeyValuePair(Serializable key, Serializable value) {
        this.key = key;
        this.value = value;
    }

    public Serializable getKey() {
        return key;
    }

    public void setKey(Serializable key) {
        this.key = key;
    }

    public Serializable getValue() {
        return this.value;
    }

    public void setValue(Serializable value) {
        this.value = value;
    }

    public int compareTo(KeyValuePair other) {
        return this.key.toString().compareTo(other.getKey().toString());
    }

    @Override
    public boolean equals(Object o) {
        if (o == null) {
            return false;
        }
        if (o == this) {
            return true;
        }
        if (!(o instanceof KeyValuePair)) {
            return false;
        }
        KeyValuePair other = (KeyValuePair) o;
        return new EqualsBuilder().append(this.getKey(), other.getKey()).isEquals();
    }

    @Override
    public int hashCode() {
        return new HashCodeBuilder(27, 63).append(this.getKey()).toHashCode();
    }

}