LocationSourcePK.java

/* ==================================================================
 * LocationSourcePK.java - Oct 17, 2014 3:03:16 PM
 * 
 * Copyright 2007-2014 SolarNetwork.net Dev Team
 * 
 * This program is free software; you can redistribute it and/or 
 * modify it under the terms of the GNU General Public License as 
 * published by the Free Software Foundation; either version 2 of 
 * the License, or (at your option) any later version.
 * 
 * This program 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 
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License 
 * along with this program; if not, write to the Free Software 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 
 * 02111-1307 USA
 * ==================================================================
 */

package net.solarnetwork.central.datum.domain;

import java.io.Serializable;

/**
 * Primary key based on a location ID and source ID.
 * 
 * @author matt
 * @version 1.0
 */
public class LocationSourcePK implements Serializable, Cloneable, Comparable<LocationSourcePK> {

	private static final long serialVersionUID = 2535992672383477286L;

	private Long locationId;
	private String sourceId;

	/**
	 * Default constructor.
	 */
	public LocationSourcePK() {
		super();
	}

	/**
	 * Construct with values.
	 * 
	 * @param locationId
	 *        the location ID
	 * @param sourceId
	 *        the source ID
	 */
	public LocationSourcePK(Long locationId, String sourceId) {
		super();
		this.locationId = locationId;
		this.sourceId = sourceId;
	}

	/**
	 * Compare two {@code LocationSourcePK} objects. Keys are ordered based on:
	 * 
	 * <ol>
	 * <li>locationId</li>
	 * <li>sourceId</li>
	 * </ol>
	 * 
	 * <em>Null</em> values will be sorted before non-<em>null</em> values.
	 */
	@Override
	public int compareTo(LocationSourcePK o) {
		if ( o == null ) {
			return 1;
		}
		if ( o.locationId == null ) {
			return 1;
		} else if ( locationId == null ) {
			return -1;
		}
		int comparison = locationId.compareTo(o.locationId);
		if ( comparison != 0 ) {
			return comparison;
		}
		if ( o.sourceId == null ) {
			return 1;
		} else if ( sourceId == null ) {
			return -1;
		}
		return sourceId.compareToIgnoreCase(o.sourceId);
	}

	@Override
	public String toString() {
		StringBuilder builder = new StringBuilder();
		builder.append("LocationSourcePK{");
		if ( locationId != null ) {
			builder.append("locationId=");
			builder.append(locationId);
			builder.append(", ");
		}
		if ( sourceId != null ) {
			builder.append("sourceId=");
			builder.append(sourceId);
		}
		builder.append("}");
		return builder.toString();
	}

	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((locationId == null) ? 0 : locationId.hashCode());
		result = prime * result + ((sourceId == null) ? 0 : sourceId.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;
		}
		LocationSourcePK other = (LocationSourcePK) obj;
		if ( locationId == null ) {
			if ( other.locationId != null ) {
				return false;
			}
		} else if ( !locationId.equals(other.locationId) ) {
			return false;
		}
		if ( sourceId == null ) {
			if ( other.sourceId != null ) {
				return false;
			}
		} else if ( !sourceId.equals(other.sourceId) ) {
			return false;
		}
		return true;
	}

	@Override
	protected Object clone() {
		try {
			return super.clone();
		} catch ( CloneNotSupportedException e ) {
			// shouldn't get here
			throw new RuntimeException(e);
		}
	}

	public Long getLocationId() {
		return locationId;
	}

	public void setLocationId(Long locationId) {
		this.locationId = locationId;
	}

	public String getSourceId() {
		return sourceId;
	}

	public void setSourceId(String sourceId) {
		this.sourceId = sourceId;
	}

}