/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * particular file as subject to the "Classpath" exception as provided

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 */

package com.sun.corba.se.impl.naming.pcosnaming;

import java.io.Serializable;

import org.omg.CosNaming.NameComponent;

/**

 * Class InternalBindingKey implements the necessary wrapper code

 * around the org.omg.CosNaming::NameComponent class to implement the proper

 * equals() method and the hashCode() method for use in a hash table.

 * It computes the hashCode once and stores it, and also precomputes

 * the lengths of the id and kind strings for faster comparison.

 */

public class InternalBindingKey

        implements Serializable

{

    // computed by serialver tool

    private static final long serialVersionUID = -5410796631793704055L;

    public String id;

    public String kind;

    // Default Constructor

    public InternalBindingKey() {}

    // Normal constructor

    public InternalBindingKey(NameComponent n)

    {

        setup(n);

    }

    // Setup the object

    protected void setup(NameComponent n) {

        this.id = n.id;

        this.kind = n.kind;

    }

    // Compare the keys by comparing name's id and kind

    public boolean equals(java.lang.Object o) {

        if (o == null)

            return false;

        if (o instanceof InternalBindingKey) {

            InternalBindingKey that = (InternalBindingKey)o;

            if( this.id != null && that.id != null )

            {

                if (this.id.length() != that.id.length() )

                {

                        return false;

                }

                // If id is set is must be equal

                if (this.id.length() > 0 && this.id.equals(that.id) == false)

                {

                        return false;

                }

            }

            else

            {

                // If One is Null and the other is not then it's a mismatch

                // So, return false

                if( ( this.id == null && that.id != null )

                ||  ( this.id !=null && that.id == null ) )

                {

                        return false;

                }

            }

            if( this.kind != null && that.kind != null )

            {

                if (this.kind.length() != that.kind.length() )

                {

                        return false;

                }

                // If kind is set it must be equal

                if (this.kind.length() > 0 && this.kind.equals(that.kind) == false)

                {

                        return false;

                }

            }

            else

            {

                // If One is Null and the other is not then it's a mismatch

                // So, return false

                if( ( this.kind == null && that.kind != null )

                ||  ( this.kind !=null && that.kind == null ) )

                {

                        return false;

                }

            }

            // We have checked all the possibilities, so return true

            return true;

        } else {

            return false;

        }

    }

    // Return precomputed value

    public int hashCode() {

        int hashVal = 0;

        if (this.id.length() > 0)

        {

            hashVal += this.id.hashCode();

        }

        if (this.kind.length() > 0)

        {

            hashVal += this.kind.hashCode();

        }

        return hashVal;

    }

}