/*

 * 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.protocol.giopmsgheaders;

import com.sun.corba.se.spi.ior.ObjectKey;

import com.sun.corba.se.spi.ior.iiop.GIOPVersion;

import com.sun.corba.se.spi.orb.ORB;

/**

 * This implements the GIOP 1.2 LocateRequest header.

 *

 * @author Ram Jeyaraman 05/14/2000

 */

public final class LocateRequestMessage_1_2 extends Message_1_2

        implements LocateRequestMessage {

    // Instance variables

    private ORB orb = null;

    private ObjectKey objectKey = null;

    private TargetAddress target = null;

    // Constructors

    LocateRequestMessage_1_2(ORB orb) {

        this.orb = orb;

    }

    LocateRequestMessage_1_2(ORB orb, int _request_id, TargetAddress _target) {

        super(Message.GIOPBigMagic, GIOPVersion.V1_2, FLAG_NO_FRAG_BIG_ENDIAN,

            Message.GIOPLocateRequest, 0);

        this.orb = orb;

        request_id = _request_id;

        target = _target;

    }

    // Accessor methods (LocateRequestMessage interface)

    public int getRequestId() {

        return this.request_id;

    }

    public ObjectKey getObjectKey() {

        if (this.objectKey == null) {

            // this will raise a MARSHAL exception upon errors.

            this.objectKey = MessageBase.extractObjectKey(target, orb);

        }

        return this.objectKey;

    }

    // IO methods

    public void read(org.omg.CORBA.portable.InputStream istream) {

        super.read(istream);

        this.request_id = istream.read_ulong();

        this.target = TargetAddressHelper.read(istream);

        getObjectKey(); // this does AddressingDisposition check

    }

    public void write(org.omg.CORBA.portable.OutputStream ostream) {

        super.write(ostream);

        ostream.write_ulong (this.request_id);

        nullCheck(this.target);

        TargetAddressHelper.write(ostream, this.target);

    }

    public void callback(MessageHandler handler)

        throws java.io.IOException

    {

        handler.handleInput(this);

    }

} // class LocateRequestMessage_1_2