/*******************************************************************************
 * Copyright 2010 Simon Mieth
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package org.kabeja.dxf.parser;

import java.util.HashMap;

import org.kabeja.dxf.parser.objects.DXFObjectHandler;
import org.kabeja.parser.ParseException;


/**
 * @author <a href="mailto:simon.mieth@gmx.de>Simon Mieth</a>
 *
 */
public class DXFObjectsSectionHandler extends AbstractSectionHandler
    implements DXFHandlerManager {
    private static String SECTION_KEY = "OBJECTS";
    public static final int OBJECT_START = 0;
    private HashMap handlers = new HashMap();
    private DXFObjectHandler handler;
    private boolean parseObject = false;

    /*
     * (non-Javadoc)
     *
     * @see de.miethxml.kabeja.parser.DXFSectionHandler#endSection()
     */
    public void endSection() {
        this.endObject();
    }

    /*
     * (non-Javadoc)
     *
     * @see de.miethxml.kabeja.parser.DXFSectionHandler#getSectionKey()
     */
    public String getSectionKey() {
        return SECTION_KEY;
    }

    /*
     * (non-Javadoc)
     *
     * @see de.miethxml.kabeja.parser.DXFSectionHandler#parseGroup(int,
     *      de.miethxml.kabeja.parser.DXFValue)
     */
    public void parseGroup(int groupCode, DXFValue value) throws ParseException {
        if (groupCode == OBJECT_START) {
            this.endObject();

            if (this.handlers.containsKey(value.getValue())) {
                this.parseObject = true;
                this.handler = (DXFObjectHandler) handlers.get(value.getValue());
                this.handler.setDocument(this.doc);
                this.handler.startObject();
            } else {
                this.parseObject = false;
            }
        } else if (this.parseObject) {
            this.handler.parseGroup(groupCode, value);
        }
    }

    /*
     * (non-Javadoc)
     *
     * @see de.miethxml.kabeja.parser.DXFSectionHandler#startSection()
     */
    public void startSection() {
        this.parseObject = false;
    }

    /*
     * (non-Javadoc)
     *
     * @see de.miethxml.kabeja.parser.Handler#releaseDXFDocument()
     */
    public void releaseDocument() {
        this.doc = null;
    }

    /* (non-Javadoc)
     * @see de.miethxml.kabeja.parser.HandlerManager#addHandler(de.miethxml.kabeja.parser.Handler)
     */
    public void addHandler(DXFHandler handler) {
        DXFObjectHandler h = (DXFObjectHandler) handler;
        h.setDocument(this.doc);
        this.handlers.put(h.getObjectType(), h);
    }

    protected void endObject() {
        if (this.parseObject) {
            //finish the old parsing object
            this.handler.endObject();
            this.doc.addObject(handler.getDXFObject());
        }
    }
}