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/*
* 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.OutputStream;
import java.io.InputStream;
import java.io.DataOutputStream;
import java.io.DataInputStream;
import java.io.IOException;
/**
* Contains the raw bytes for a {@code Record} in a PDB.
*
* <p>Note that it is not associated with a {@code Record} number or ID.</p>
*
* @see PalmDocument
* @see PalmDB
*/
public final class Record {
/** {@code Record} {@code byte} array. */
private byte[] data;
/** {@code Record} attributes. */
private byte attributes = 0;
/**
* Default constructor.
*/
public Record() {
data = new byte[0];
}
/**
* Constructor to create a {@code Record} filled with bytes.
*
* <p>Note that this does not check for 64k {@code Record} sizes. User of
* this class must check for that.</p>
*
* @param d {@code byte} array contents for this object.
*/
public Record(byte[] d) {
this(d, (byte) 0);
}
/**
* Constructor to create a {@code Record} filled with bytes and assign
* {@code Record} attributes.
*
* <p>Note that this does not check for 64k {@code Record} sizes. User of
* this class must check for that.</p>
*
* @param d {@code byte} array contents for this object.
* @param attrs {@code Record} attributes.
*/
public Record(byte[] d, byte attrs) {
data = new byte[d.length];
attributes = attrs;
System.arraycopy(d, 0, data, 0, d.length);
}
/**
* This method returns the number of bytes in this object.
*
* @return Number of bytes in this object.
*/
public int getSize() {
return data.length;
}
/**
* This method returns the contents of this {@code Object}.
*
* @return Contents in {@code byte} array
*/
public byte[] getBytes() {
return data;
}
/**
* <p>This method returns the {@code Record} attributes.</p>
*
* <blockquote><pre>{@code Record} attributes consists of (from high to low bit)
*
* delete (1) - dirty (1) - busy (1) - secret (1) - category (4)</pre></blockquote>
*
* @return {@code Record} attribute.
*/
public byte getAttributes() {
return attributes;
}
/**
* Write out the {@code Record} attributes and {@code Record} length
* followed by the data in this {@code Record} object.
*
* @param outs The {@code OutputStream} to write the object.
*
* @throws IOException If any I/O error occurs.
*/
public void write(OutputStream outs) throws IOException {
DataOutputStream out = new DataOutputStream(outs);
out.writeByte(attributes);
out.writeShort(data.length);
out.write(data);
}
/**
* Read the necessary data to create a PDB from the {@code InputStream}.
*
* @param ins The {@code InputStream} to read data from in order to
* restore the {@code object}.
*
* @throws IOException If any I/O error occurs.
*/
public void read(InputStream ins) throws IOException {
DataInputStream in = new DataInputStream(ins);
attributes = in.readByte();
int len = in.readUnsignedShort();
data = new byte[len];
in.readFully(data);
}
/**
* Override equals method of {@code Object}.
*
* <p>Two {@code Record} objects are equal if they contain the same bytes
* in the array and the same attributes.</p>
*
* <p>This is used primarily for testing purposes only for now.</p>
*
* @param obj A {@code Record} object to compare with
*
* @return {@code true} if {@code obj} is equal, otherwise {@code false}.
*/
@Override
public boolean equals(Object obj) {
if (!(obj instanceof Record)) {
return false;
}
Record rec = (Record) obj;
if (rec.getAttributes() != attributes) {
return false;
}
if (rec.getSize() == data.length) {
for (int i = 0; i < data.length; i++) {
if (data[i] != rec.data[i]) {
return false;
}
}
}
return false;
}
@Override
public int hashCode() {
return 0;
}
}
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