org.daisy.braille.utils.pef.FileCompare Maven / Gradle / Ivy
/*
* Braille Utils (C) 2010-2011 Daisy Consortium
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library 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 for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.daisy.braille.utils.pef;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
/**
* Provides functionality to check if files are equal.
* @author Joel Håkansson
*/
public class FileCompare {
private int pos;
/**
* Creates a new FileCompare object
*/
public FileCompare() {
super();
}
/**
* Creates a new FileCompare object
* @param keepTempFiles true if temporary files should be kept, false otherwise
* @deprecated this constructor serves no purpose
*/
@Deprecated
public FileCompare(boolean keepTempFiles) {
super();
}
/**
* Gets the intermediary file created
* from the first argument of the latest call to compareXML
* (as base for the post normalization binary compare).
* @return returns the first file
* @throws IllegalStateException if temporary files are not kept
* or if compareXML has not been called.
* @deprecated this method serves no purpose here
*/
@Deprecated
public File getFileOne() {
throw new IllegalStateException();
}
/**
* Gets the intermediary file created
* from the second argument of the latest call to compareXML
* (as base for the post normalization binary compare).
* @return returns the second file
* @throws IllegalStateException if temporary files are not kept
* or if compareXML has not been called.
* @deprecated this method serves no purpose here
*/
@Deprecated
public File getFileTwo() {
throw new IllegalStateException();
}
/**
* Gets the byte position where the latest call to compareBinary or compareXML failed, or -1
* if compare was successful
* @return returns the byte position
*/
public int getPos() {
return pos;
}
/**
* Compares the input streams binary.
* @param f1 the first input stream
* @param f2 the second input stream
* @return returns true if the streams are equal, false otherwise
* @throws IOException if IO fails
*/
public boolean compareBinary(InputStream f1, InputStream f2) throws IOException {
try ( InputStream bf1 = new BufferedInputStream(f1);
InputStream bf2 = new BufferedInputStream(f2) ){
int b1;
int b2;
pos = 0;
while ((b1 = bf1.read())!=-1 & b1 == (b2 = bf2.read())) {
pos++;
//continue
}
if (b1!=-1 || b2!=-1) {
return false;
}
pos = -1;
return true;
}
}
}