/*

   Copyright 2001  The Apache Software Foundation 

   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.apache.batik.svggen.font.table;

import java.io.IOException;
import org.apache.batik.svggen.font.*;

/**
 *
 * @author <a href="mailto:david@steadystate.co.uk">David Schweinsberg</a>
 * @version $Id: Lookup.java,v 1.3 2004/08/18 07:15:21 vhardy Exp $
 */
public class Lookup {

    // LookupFlag bit enumeration
    public static final int IGNORE_BASE_GLYPHS = 0x0002;
    public static final int IGNORE_BASE_LIGATURES = 0x0004;
    public static final int IGNORE_BASE_MARKS = 0x0008;
    public static final int MARK_ATTACHMENT_TYPE = 0xFF00;

    private final int type;
    private final int flag;
    private final int subTableCount;
    private final int[] subTableOffsets;
    private final LookupSubtable[] subTables;

    /** Creates new Lookup
     * @param factory
     * @param raf
     * @param offset 
     * @throws java.io.IOException 
     */
    public Lookup(LookupSubtableFactory factory, RandomAccessFileEmulator raf, int offset)
    throws IOException {
        raf.seek(offset);
        type = raf.readUnsignedShort();
        flag = raf.readUnsignedShort();
        subTableCount = raf.readUnsignedShort();
        subTableOffsets = new int[subTableCount];
        subTables = new LookupSubtable[subTableCount];
        for (int i = 0; i < subTableCount; i++) {
            subTableOffsets[i] = raf.readUnsignedShort();
        }
        for (int i = 0; i < subTableCount; i++) {
            subTables[i] = factory.read(type, raf, offset + subTableOffsets[i]);
        }
    }

    public int getType() {
        return type;
    }

    public int getSubtableCount() {
        return subTableCount;
    }

    public LookupSubtable getSubtable(int i) {
        return subTables[i];
    }

}