/*-
 * Copyright (C) 2008 Erik Larsson
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

package org.catacombae.hfs.types.hfscommon;

import org.catacombae.hfs.types.hfsplus.HFSPlusExtentKey;
import org.catacombae.hfs.types.hfs.ExtKeyRec;

/**
 * @author <a href="https://catacombae.org" target="_top">Erik Larsson</a>
 */
public abstract class CommonHFSExtentIndexNode
        extends CommonBTKeyedNode<CommonBTIndexRecord<CommonHFSExtentKey>>
{

    protected CommonHFSExtentIndexNode(byte[] data, int offset, int nodeSize, FSType type) {
        super(data, offset, nodeSize, type);
    }

    public static CommonHFSExtentIndexNode createHFS(byte[] data, int offset, int nodeSize) {
        return new HFSImplementation(data, offset, nodeSize);
    }

    public static CommonHFSExtentIndexNode createHFSPlus(byte[] data, int offset, int nodeSize) {
        return new HFSPlusImplementation(data, offset, nodeSize);
    }

    public static class HFSImplementation extends CommonHFSExtentIndexNode {
        public HFSImplementation(byte[] data, int offset, int nodeSize) {
            super(data, offset, nodeSize, FSType.HFS);
        }

        @Override
        protected CommonBTIndexRecord<CommonHFSExtentKey> createBTRecord(int recordNumber, byte[] data, int offset, int length) {
            final CommonHFSExtentKey key = CommonHFSExtentKey.create(new ExtKeyRec(data, offset));

            return CommonBTIndexRecord.createHFS(key, data, offset);
        }
    }

    public static class HFSPlusImplementation extends CommonHFSExtentIndexNode {
        public HFSPlusImplementation(byte[] data, int offset, int nodeSize) {
            super(data, offset, nodeSize, FSType.HFS_PLUS);
        }

        @Override
        protected CommonBTIndexRecord<CommonHFSExtentKey> createBTRecord(int recordNumber, byte[] data, int offset, int length) {
            final CommonHFSExtentKey key = CommonHFSExtentKey.create(new HFSPlusExtentKey(data, offset));

            return CommonBTIndexRecord.createHFSPlus(key, data, offset);
        }
    }
}
