/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * 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]
 *
 * CDDL HEADER END
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/*
 * Copyright (c) 1999 by Sun Microsystems, Inc.
 * All rights reserved.
 *
 */

//  CAttrMsg.java: Message class for SLP attribute
//                 reply.
//  Author: James Kempf Created On: Thu Oct 9 15:17:36 1997
//  Last Modified By: James Kempf
//  Last Modified On: Tue Oct 27 10:57:38 1998
//  Update Count: 107
//

package com.sun.slp;

import java.util.*;
import java.io.*;


/**
 * The CAttrMsg class models the SLP client side attribute message.
 *
 * @author James Kempf
 */

class CAttrMsg extends SrvLocMsgImpl {

    // Vector of ServiceLocationAttribute objects
    Vector attrList = new Vector();
    Hashtable attrAuthBlock = null;  // auth block list for objects

    // Only used for testing.

    protected CAttrMsg() { }

    // Construct a CAttrMsg from the byte input stream.

    CAttrMsg(SLPHeaderV2 hdr, DataInputStream dis)
        throws ServiceLocationException, IOException {

        super(hdr, SrvLocHeader.AttrRply);

        // Don't parse the rest if there's an error.

        if (hdr.errCode != ServiceLocationException.OK) {
            return;

        }

        // Ignore if overflow.

        if (hdr.overflow) {
            return;

        }

        // Parse in the potentially authenticated attribute list.

        attrAuthBlock =
            hdr.parseAuthenticatedAttributeVectorIn(attrList, dis, true);

        // Verify authentication, if necessary.

        if (attrAuthBlock != null) {
            AuthBlock.verifyAll(attrAuthBlock);
        }

        // Set the number of replies.

        hdr.iNumReplies = attrList.size();

    }

    // Construct a CAttrMsg payload from the arguments. This will be
    //   an AttrRqst message.

    CAttrMsg(Locale locale, ServiceURL url, Vector scopes, Vector tags)
        throws ServiceLocationException {

        this.hdr = new SLPHeaderV2(SrvLocHeader.AttrRqst, false, locale);

        constructPayload(url.toString(), scopes, tags);

    }

    // Construct a CAttrMsg payload from the arguments. This will be
    //   an AttrRqst message.

    CAttrMsg(Locale locale, ServiceType type, Vector scopes, Vector tags)
        throws ServiceLocationException {

        this.hdr = new SLPHeaderV2(SrvLocHeader.AttrRqst, false, locale);

        constructPayload(type.toString(), scopes, tags);

    }

    // Convert the message into bytes for the payload buffer.

    protected void constructPayload(String typeOrURL,
                                    Vector scopes,
                                    Vector tags)
        throws ServiceLocationException {

        SLPHeaderV2 hdr = (SLPHeaderV2)this.hdr;
        hdr.scopes = (Vector)scopes.clone();

        // Set up previous responders.

        hdr.previousResponders = new Vector();

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        // Write out the service type or URL.

        hdr.putString(typeOrURL, baos);

        // Escape scope strings for transmission.

        hdr.escapeScopeStrings(scopes);

        // Parse out the scopes.

        hdr.parseCommaSeparatedListOut(scopes, baos);

        // Escape tags going out.

        hdr.escapeTags(tags);

        // Parse out the tags

        hdr.parseCommaSeparatedListOut(tags, baos);

        // Retrieve the configured SPI, if any
        String spi = "";
        if (SLPConfig.getSLPConfig().getHasSecurity()) {
            LinkedList spiList = AuthBlock.getSPIList("sun.net.slp.SPIs");
            if (spiList != null && !spiList.isEmpty()) {
                // There can be only one configured SPI for UAs
                spi = (String) spiList.getFirst();
            }
        }

        hdr.putString(spi, baos);

        // Set payload.

        hdr.payload = baos.toByteArray();
    }

}