PdbDecoder.java

Go to the documentation of this file.

/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you 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 .
 */
 
package org.openoffice.xmerge.converter.palm;
 
import java.io.IOException;
import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
 
public final class PdbDecoder {
 
     public PalmDB parse(byte[] b) throws IOException {
 
     ByteArrayInputStream bais = new ByteArrayInputStream(b);
     DataInputStream dis = new DataInputStream(bais);
 
        // read the PDB header
        PdbHeader header = new PdbHeader();
        header.read(dis);
 
        Record recArray[] = new Record[header.numRecords];
        if (header.numRecords != 0) {
 
            // read in the record indices + offsets
            int recOffset[] = new int[header.numRecords];
            byte recAttrs[] = new byte[header.numRecords];
 
            for (int i = 0; i < header.numRecords; i++) {
 
                recOffset[i] = dis.readInt();
 
                // read in attributes (1 byte) + unique id (3 bytes)
                // take away the unique id, store the attributes
                int attr = dis.readInt();
                recAttrs[i] = (byte) (attr >>> 24);
            }
 
            // read the records
            int lastIndex = header.numRecords - 1;
 
            for (int i = 0; i < lastIndex; i++) {
 
                //dis.seek(recOffset[i]);
                dis.reset();
                int nBytesToSkip = recOffset[i];
                while (nBytesToSkip > 0) {
                    nBytesToSkip -= dis.skip(nBytesToSkip);
                }
                int len = recOffset[i+1] - recOffset[i];
                byte[] bytes = new byte[len];
                dis.readFully(bytes);
                recArray[i] = new Record(bytes, recAttrs[i]);
            }
 
            // last record
            dis.reset();
            int len = dis.available() - recOffset[lastIndex];
            int nBytesToSkip = recOffset[lastIndex];
            while (nBytesToSkip > 0) {
                nBytesToSkip -= dis.skip(nBytesToSkip);
            }
            byte[] bytes = new byte[len];
            dis.readFully(bytes);
            recArray[lastIndex] = new Record(bytes, recAttrs[lastIndex]);
        }
 
        // create PalmDB and return it
        PalmDB pdb = new PalmDB(header.pdbName, header.creatorID,
            header.typeID, header.version, header.attribute, recArray);
 
        return pdb;
    }
}