HFSXVolume.java

/*-
 * Copyright (C) 2006-2009 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.x;

import org.catacombae.hfs.types.hfscommon.CommonBTHeaderRecord;
import org.catacombae.hfs.types.hfscommon.CommonHFSCatalogIndexNode;
import org.catacombae.hfs.types.hfscommon.CommonHFSCatalogKey;
import org.catacombae.hfs.types.hfscommon.CommonHFSCatalogLeafNode;
import org.catacombae.hfs.types.hfscommon.CommonHFSCatalogLeafRecord;
import org.catacombae.hfs.types.hfscommon.CommonHFSCatalogNodeID;
import org.catacombae.hfs.types.hfscommon.CommonHFSCatalogString;
import org.catacombae.hfs.types.hfsplus.BTHeaderRec;
import org.catacombae.hfs.types.hfsplus.HFSCatalogNodeID;
import org.catacombae.hfs.types.hfsplus.HFSUniStr255;
import org.catacombae.hfs.types.hfsx.HFSXCatalogKey;
import org.catacombae.io.ReadableRandomAccessStream;
import org.catacombae.hfs.plus.HFSPlusVolume;
import org.catacombae.hfs.types.hfsplus.HFSPlusVolumeHeader;

/**
 * @author <a href="http://www.catacombae.org/" target="_top">Erik Larsson</a>
 */
public class HFSXVolume extends HFSPlusVolume {
    private final byte keyCompareType;

    public HFSXVolume(ReadableRandomAccessStream hfsFile,
            boolean cachingEnabled) {

        super(hfsFile, cachingEnabled, HFSPlusVolumeHeader.SIGNATURE_HFSX);

        CommonBTHeaderRecord.CompareType keyCompareTypeEnum =
                getCatalogFile().getCatalogHeaderNode().getHeaderRecord().
                getKeyCompareType();


        switch(keyCompareTypeEnum) {
            case CASE_FOLDING:
                this.keyCompareType = BTHeaderRec.kHFSCaseFolding;
                break;
            case BINARY_COMPARE:
                this.keyCompareType = BTHeaderRec.kHFSBinaryCompare;
                break;
            default:
                throw new RuntimeException("Unknown key compare type:" +
                        keyCompareTypeEnum);
        }
    }

    @Override
    public CommonHFSCatalogIndexNode newCatalogIndexNode(byte[] data,
            int offset, int nodeSize)
    {
        return CommonHFSCatalogIndexNode.createHFSX(data, offset, nodeSize,
                keyCompareType);
    }

    @Override
    public CommonHFSCatalogKey newCatalogKey(CommonHFSCatalogNodeID nodeID,
            CommonHFSCatalogString searchString)
    {
        return CommonHFSCatalogKey.create(new HFSXCatalogKey(
                new HFSCatalogNodeID((int) nodeID.toLong()),
                new HFSUniStr255(searchString.getStructBytes(), 0),
                keyCompareType));
    }

    @Override
    public CommonHFSCatalogLeafNode newCatalogLeafNode(byte[] data, int offset,
            int nodeSize)
    {
        return CommonHFSCatalogLeafNode.createHFSX(data, offset, nodeSize,
                keyCompareType);
    }

    @Override
    public CommonHFSCatalogLeafRecord newCatalogLeafRecord(byte[] data,
            int offset)
    {
        return CommonHFSCatalogLeafRecord.createHFSX(data, offset,
                offset + data.length, keyCompareType);
    }
}