src/main/java/net/onrc/onos/ofcontroller/util/Dpid.java

package net.onrc.onos.ofcontroller.util;

import net.onrc.onos.ofcontroller.util.serializers.DpidDeserializer;
import net.onrc.onos.ofcontroller.util.serializers.DpidSerializer;

import org.codehaus.jackson.map.annotate.JsonDeserialize;
import org.codehaus.jackson.map.annotate.JsonSerialize;
import org.openflow.util.HexString;

/**
 * The class representing a network switch DPID.
 */
@JsonDeserialize(using=DpidDeserializer.class)
@JsonSerialize(using=DpidSerializer.class)
public class Dpid {
    static public final long UNKNOWN = 0;

    private long value;

    /**
     * Default constructor.
     */
    public Dpid() {
	this.value = Dpid.UNKNOWN;
    }

    /**
     * Constructor from a long value.
     *
     * @param value the value to use.
     */
    public Dpid(long value) {
	this.value = value;
    }

    /**
     * Constructor from a string.
     *
     * @param value the value to use.
     */
    public Dpid(String value) {
	this.value = HexString.toLong(value);
    }

    /**
     * Get the value of the DPID.
     *
     * @return the value of the DPID.
     */
    public long value() { return value; }

    /**
     * Set the value of the DPID.
     *
     * @param value the value to set.
     */
    public void setValue(long value) {
	this.value = value;
    }

    /**
     * Convert the DPID value to a ':' separated hexadecimal string.
     *
     * @return the DPID value as a ':' separated hexadecimal string.
     */
    @Override
    public String toString() {
	return HexString.toHexString(this.value);
    }

    @Override
    public boolean equals(Object other) {
    	if (!(other instanceof Dpid)) {
    		return false;
    	}

    	Dpid otherDpid = (Dpid) other;

    	return value == otherDpid.value;
    }

    @Override
    public int hashCode() {
    	int hash = 17;
    	hash += 31 * hash + (int)(value ^ value >>> 32); 
    	return hash;
    }
}