/*
 * NOTE: This copyright does *not* cover user programs that use HQ
 * program services by normal system calls through the application
 * program interfaces provided as part of the Hyperic Plug-in Development
 * Kit or the Hyperic Client Development Kit - this is merely considered
 * normal use of the program, and does *not* fall under the heading of
 * "derived work".
 * 
 * Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
 * This file is part of HQ.
 * 
 * HQ is free software; you can redistribute it and/or modify
 * it under the terms version 2 of the GNU General Public License as
 * published by the Free Software Foundation. This program 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 for more
 * details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 */

package org.hyperic.hq.bizapp.shared.resourceImport;

import org.hyperic.util.xmlparser.XmlAttr;
import org.hyperic.util.xmlparser.XmlAttrException;
import org.hyperic.util.xmlparser.XmlAttrHandler;
import org.hyperic.util.xmlparser.XmlEndAttrHandler;
import org.hyperic.util.xmlparser.XmlTagEntryHandler;
import org.hyperic.util.xmlparser.XmlTagExitHandler;
import org.hyperic.util.xmlparser.XmlTagHandler;
import org.hyperic.util.xmlparser.XmlTagInfo;

import java.util.List;

class GroupTag
    implements XmlAttrHandler, XmlTagHandler, 
               XmlTagEntryHandler, XmlTagExitHandler,
               XmlEndAttrHandler
{
    static final String TAG_NAME = "group";

    private XmlAttr[]       attrs;
    private XmlGroupValue     groupValue;   // Current working group
    private List                 groupList;    // List to add groups to

    GroupTag(List groupList){
        String[] required, optional;
        
        required       = XmlGroupValue.getRequiredAttributes();
        optional       = XmlGroupValue.getOptionalAttributes();
        this.attrs     = Parser.convertGhettoToAttrs(required, optional);
        this.groupList = groupList;
    }

    public String getName(){
        return TAG_NAME;
    }

    public XmlAttr[] getAttributes(){ 
        return this.attrs;
    }

    public XmlTagInfo[] getSubTags(){
        return new XmlTagInfo[] {
            new XmlTagInfo(new GroupMemberTag(this.groupValue),
                                XmlTagInfo.ZERO_OR_MORE),
        };
    }

    public void handleAttribute(int idx, String value)
        throws XmlAttrException
    {
        try {
            this.groupValue.setValue(this.attrs[idx].getName(),
                                     value);
        } catch(XmlInvalidAttrException exc){
            throw new XmlAttrException(exc.getMessage());
        }
    }

    public void endAttributes()
        throws XmlAttrException
    {
        try {
            this.groupValue.endAttributes();
        } catch(XmlInvalidAttrException exc){
            throw new XmlAttrException(exc.getMessage());
        }
    }

    public void enter(){
        if(this.groupValue != null)
            throw new IllegalStateException("Invalid group state");

        this.groupValue = new XmlGroupValue();
    }

    public void exit(){
        if(this.groupValue == null)
            throw new IllegalStateException("Invalid group state");

        this.groupList.add(this.groupValue);
        this.groupValue   = null;
    }
}