/*

 * CDDL HEADER START

 *

 * The contents of this file are subject to the terms of the

 *

 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE

 * or http://www.opensolaris.org/os/licensing.

 * See the License for the specific language governing permissions

 * and limitations under the License.

 *

 * When distributing Covered Code, include this CDDL HEADER in each

 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.

 * If applicable, add the following below this CDDL HEADER, with the

 * fields enclosed by brackets "[]" replaced with your own identifying

 * information: Portions Copyright [yyyy] [name of copyright owner]

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 * CDDL HEADER END

 */

/*

 * Copyright (c) 1999 by Sun Microsystems, Inc.

 * All rights reserved.

 *

 */

//  SAttrMsg.java:    Message class for SLP attribute request.

//  Author:           James Kempf

//  Created On:       Thu Oct  9 14:24:55 1997

//  Last Modified By: James Kempf

//  Last Modified On: Tue Oct 27 10:57:41 1998

//  Update Count:     131

//

package com.sun.slp;

import java.util.*;

import java.io.*;

/**

 * The SAttrMsg class models the SLP server side attribute message.

 * Subclasses for other versions can specialize the

 * initialize() and makeReply() methods.

 *

 * @author James Kempf

 */

class SAttrMsg extends SrvLocMsgImpl {

    ServiceURL URL = null;      // nonNull if a URL query.

    String serviceType = null;  // nonNull if a service type query.

    Vector tags = new Vector(); // Vector of String tags.

    String spi = "";	      // requested SPI

    protected SAttrMsg() {}

    // Construct a SAttrMsg from the input stream. This will

    //  be an SLP attribute request.

    SAttrMsg(SrvLocHeader hdr, DataInputStream dis)

	throws ServiceLocationException, IOException {

	super(hdr, SrvLocHeader.AttrRqst);

	this.initialize(dis);

    }

    // Initialize the message object.

    void initialize(DataInputStream dis)

	throws ServiceLocationException, IOException {

	SLPServerHeaderV2 hdr = (SLPServerHeaderV2)getHeader();

	StringBuffer buf = new StringBuffer();

	// Parse in the previous responder's list.

	hdr.parsePreviousRespondersIn(dis);

	// Parse in the URL or service type.

	hdr.getString(buf, dis);

	String urlOrServiceType = buf.toString();

	// Decide whether this is a service type or service URL

	try {

	    URL = new ServiceURL(urlOrServiceType, ServiceURL.LIFETIME_NONE);

	    serviceType = null;

	} catch (IllegalArgumentException ex) {

	    // Validate and remove IANA.

	    ServiceType t = new ServiceType(urlOrServiceType);

	    serviceType = t.toString();

	    URL = null;

	}

	// Parse in the scopes.

	hdr.parseScopesIn(dis);

	// Parse in the attribute tags.

	hdr.getString(buf, dis);

	tags = hdr.parseCommaSeparatedListIn(buf.toString(), true);

	// Unescape tags.

	hdr.unescapeTags(tags);

	// Get the SPI

	hdr.getString(buf, dis);

	spi = buf.toString();

	// Construct the description.

	hdr.constructDescription("AttrRqst",

				 "         " +

				 (URL != null ?

					("URL=``" + URL):

					("service type=``" + serviceType)) +

				 "''\n" +

				 "         tags=``" + tags + "''\n" +

				 "         spi=``" + spi + "''\n");

    }

    // Construct an SAttrMsg payload for reply to client. This will

    //  be an AttrRply message.

    SrvLocMsg makeReply(Vector attrs, Hashtable auth)

	throws ServiceLocationException {

	SLPServerHeaderV2 hdr =

	    ((SLPServerHeaderV2)getHeader()).makeReplyHeader();

	hdr.iNumReplies = attrs.size();

	// Select AuthBlock with requested SPI

	if (auth != null) {

	    AuthBlock selectedAuth = AuthBlock.getEquivalentAuth(spi, auth);

	    auth = null;

	    if (selectedAuth != null) {

		auth = new Hashtable();

		auth.put(spi, selectedAuth);

	    }

	}

	ByteArrayOutputStream baos = new ByteArrayOutputStream();

	hdr.parseAttributeVectorOut(attrs, 0, (auth != null),

				    auth, baos, true);

	hdr.payload = baos.toByteArray();

	// Construct description.

	hdr.constructDescription("AttrRply",

				 "        attributes=``" +

				 attrs +

				 "''\n" +

				 "        auth block=" +

				 AuthBlock.desc(auth) +

				 "\n");

	return hdr;

    }

}