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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2008 by Sun Microsystems, Inc.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* $RCSfile: Record.java,v $
* $Revision: 1.4 $
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
import java.io.OutputStream;
import java.io.InputStream;
import java.io.DataOutputStream;
import java.io.DataInputStream;
import java.io.IOException;
/**
* <p>Contains the raw bytes for a record in a pdb.</p>
*
* <p>Note that it is not associated with a record number or id.</p>
*
* @author Akhil Arora, Herbie Ong
* @see PalmDB
*/
public final class Record {
/** record bytes */
private byte[] data;
/**
* Default constructor.
*/
public Record() {
data = new byte[0];
}
/**
* Constructor to create a Record filled with bytes.
* Note that this does not check for 64k record sizes.
* User of this class has to check for that.
*
* @param d byte array contents for this object.
*/
public Record(byte[] d) {
data = new byte[d.length];
System.arraycopy(d, 0, data, 0, d.length);
}
/**
* This method returns the number of bytes in this object.
*
* @return int number of bytes in this object.
*/
public int getSize() {
return data.length;
}
/**
* This method returns the contents of this object.
*
* @return byte[] contents in byte array
*/
public byte[] getBytes() {
return data;
}
/**
* Write out the record length followed by the data
* in this Record object.
*
* @param out the stream to write the object to
* @throws IOException if any I/O error occurs
*/
public void write(OutputStream outs) throws IOException {
DataOutputStream out = new DataOutputStream(outs);
out.writeShort(data.length);
out.write(data);
}
/**
* Read the necessary data to create a pdb from
* the input stream.
*
* @param in the stream to read data from in order to
* restore the object
* @throws IOException if any I/O error occurs
*/
public void read(InputStream ins) throws IOException {
DataInputStream in = new DataInputStream(ins);
int len = in.readUnsignedShort();
data = new byte[len];
in.readFully(data);
}
/**
* Override equals method of Object.
*
* 2 Record objects are equal if they contain the same bytes
* in the array.
*
* This is used primarily for testing purposes only for now.
*
* @param obj a Record object to compare with
* @return boolean true if obj is equal to this, else false.
*/
public boolean equals(Object obj) {
boolean bool = false;
if (obj instanceof Record) {
Record rec = (Record) obj;
checkLabel: {
if (rec.getSize() == data.length) {
for (int i = 0; i < data.length; i++) {
if (data[i] != rec.data[i]) {
break checkLabel;
}
}
bool = true;
}
}
}
return bool;
}
}
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