/*******************************************************************************
 * 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.filter;

import org.kabeja.dxf.parser.DXFValue;
import org.kabeja.parser.ParseException;


abstract class DXFStreamSectionFilter extends AbstractDXFStreamFilter {
    private final static String SECTION_START = "SECTION";
    private final static String SECTION_END = "ENDSEC";
    private final static int COMMAND_CODE = 0;
    protected boolean sectionStarts = false;
    protected String section;

    public void parseGroup(int groupCode, DXFValue value)
        throws ParseException {
        if ((groupCode == COMMAND_CODE) &&
                SECTION_START.equals(value.getValue())) {
            sectionStarts = true;
        } else if (sectionStarts) {
            sectionStarts = false;
            section = value.getValue();
            sectionStart(section);
            parseSection(COMMAND_CODE, new DXFValue(SECTION_START));
            parseSection(groupCode, value);
        } else {
            parseSection(groupCode, value);
        }

        if ((groupCode == COMMAND_CODE) &&
                SECTION_END.equals(value.getValue())) {
            sectionEnd(section);
        }
    }

    protected abstract void parseSection(int groupCode, DXFValue value)
        throws ParseException;

    protected abstract void sectionStart(String Section)
        throws ParseException;

    protected abstract void sectionEnd(String Section)
        throws ParseException;
}