/*
* NOTE: This copyright does *not* cover user programs that use HQ
* program services by normal system calls through the application
* program interfaces provided as part of the Hyperic Plug-in Development
* Kit or the Hyperic Client Development Kit - this is merely considered
* normal use of the program, and does *not* fall under the heading of
* "derived work".
*
* Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
* This file is part of HQ.
*
* HQ is free software; you can redistribute it and/or modify
* it under the terms version 2 of the GNU General Public License as
* published by the Free Software Foundation. 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*/
package org.hyperic.util.file;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Arrays;
public class FileComparator {
public boolean compare ( File file1, File file2 ) throws IOException {
FileInputStream f1 = null;
FileInputStream f2 = null;
byte[] buf1 = new byte[4096];
byte[] buf2 = new byte[4096];
int read1, read2;
try {
f1 = new FileInputStream(file1);
f2 = new FileInputStream(file2);
read1 = f1.read(buf1);
read2 = f2.read(buf2);
if (read1 == -1) return (read2 == -1);
if (read2 == -1) return false;
while (true) {
if ( !Arrays.equals(buf1, buf2) ) return false;
read1 = f1.read(buf1);
read2 = f2.read(buf2);
if (read1 == -1) return (read2 == -1);
if (read2 == -1) return false;
}
} finally {
try { if (f1 != null) f1.close(); } catch ( Exception e ) {}
try { if (f2 != null) f2.close(); } catch ( Exception e ) {}
}
}
}