/*
 * 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
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 * CDDL HEADER END
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/*
 * Copyright (c) 1999 by Sun Microsystems, Inc.
 * All rights reserved.
 *
 */

//  SLPV1SAttrMsg.java: SLPv1 Attribute request for server.
//  Author:           James Kempf
//  Created On:       Fri Sep 11 13:23:28 1998
//  Last Modified By: James Kempf
//  Last Modified On: Tue Oct 27 10:57:39 1998
//  Update Count:     19
//



package com.sun.slp;

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


/**
 * The SLPV1SAttrMsg class models the SLP server side attribute message.
 *
 * @author James Kempf
 */

class SLPV1SAttrMsg extends SAttrMsg {

    // For creating null reply.

    SLPV1SAttrMsg() {}

    // Construct a SLPV1SAttrMsg from the byte input stream. This will

    SLPV1SAttrMsg(SrvLocHeader hdr, DataInputStream dis)
        throws ServiceLocationException, IOException {

        super(hdr, dis);

    }

    // Construct an empty SLPV1SSrvMsg, for monolingual off.

    static SrvLocMsg makeEmptyReply(SLPHeaderV1 hdr)
        throws ServiceLocationException {

        SLPV1SAttrMsg msg = new SLPV1SAttrMsg();
        msg.hdr = hdr;

        msg.makeReply(new Vector(), null);

        return msg;

    }

    void initialize(DataInputStream dis)
        throws ServiceLocationException, IOException {

        SLPHeaderV1 hdr = (SLPHeaderV1)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().trim();

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

        try {

            URL = new ServiceURLV1(urlOrServiceType,
                                   ServiceURL.LIFETIME_DEFAULT);

            serviceType = null;

        } catch (IllegalArgumentException ex) {

            // Check to make sure service type is right.

            serviceType =
                hdr.checkServiceType(urlOrServiceType.toLowerCase());

            URL = null;
        }

        // Parse in the scope and validate it.

        hdr.getString(buf, dis);

        String scope = buf.toString().toLowerCase().trim();

        hdr.validateScope(scope);

        // Change unscoped to default.

        if (scope.length() <= 0) {
            scope = Defaults.DEFAULT_SCOPE;

        }

        hdr.scopes = new Vector();
        hdr.scopes.addElement(scope);

        // Parse in the attribute tags.

        hdr.getString(buf, dis);

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

        // Unescape tags.

        int i, n = tags.size();

        for (i = 0; i < n; i++) {
            String tag = (String)tags.elementAt(i);

            // Check for starting and ending wildcards.

            boolean wildcardStart = false;
            boolean wildcardEnd = false;

            if (tag.startsWith("*")) {
                wildcardStart = true;
                tag = tag.substring(1, tag.length());
            }

            if (tag.endsWith("*")) {
                wildcardEnd = true;
                tag = tag.substring(0, tag.length()-1);
            }

            tag =
                ServiceLocationAttributeV1.unescapeAttributeString(tag,
                                                                hdr.charCode);

            if (wildcardStart) {
                tag = "*" + tag;
            }

            if (wildcardEnd) {
                tag = tag + "*";
            }

            tags.setElementAt(tag.trim(), i);
        }

        hdr.constructDescription("AttrRqst",
                                 "         " +
                                 (URL != null ? ("URL=``" + URL):
                                  ("service type=``" + serviceType)) +
                                 "''\n" +
                                 "         tags=``" + tags + "''");
    }

    // Construct an SAttrMsg payload for reply to client.

    SrvLocMsg makeReply(Vector attrs, Hashtable auth)
        throws ServiceLocationException {

        SLPHeaderV1 hdr = ((SLPHeaderV1)getHeader()).makeReplyHeader();

        // We need to check whether this is an AttrRqst by type and
        //  if the type was an abstract type. If so, we simply return
        //  an empty reply, but we print a message to the log so the problem
        //  can be fixed.

        if (serviceType != null) {
            ServiceType type = new ServiceType(serviceType);
            ServiceStore store = ServiceTable.getServiceTable().store;
            Vector types = store.findServiceTypes(type.getNamingAuthority(),
                                                  this.hdr.scopes);

            int i, n = types.size();

            for (i = 0; i < n; i++) {
                String stype = (String)types.elementAt(i);
                ServiceType ttype = new ServiceType(stype);

                if (ttype.isAbstractType() &&
                    type.equals(ttype.getAbstractTypeName())) {

                    // We are out of luck!

                    SLPConfig config = SLPConfig.getSLPConfig();

                    config.writeLog("v1_abstract_type_conflict",
                                    new Object[] {serviceType,
                                                      ttype});
                    attrs.removeAllElements();
                }
            }
        }

        hdr.iNumReplies = attrs.size();

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        hdr.parseAttributeVectorOut(attrs, baos); // attributes

        hdr.payload = baos.toByteArray();

        hdr.constructDescription("AttrRply",
                                 "        attributes=``" + attrs + "''\n");

        return hdr;
    }
}