package org.apache.maven.archetype.common.util;
/*
* 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
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import org.codehaus.plexus.logging.AbstractLogEnabled;
import org.mozilla.intl.chardet.nsDetector;
import org.mozilla.intl.chardet.nsICharsetDetectionObserver;
import org.mozilla.intl.chardet.nsPSMDetector;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
/**
* @author rafale
*/
public class FileCharsetDetector
extends AbstractLogEnabled
{
private String charset = null;
private boolean found = false;
public FileCharsetDetector( File detectedFile )
throws FileNotFoundException, IOException
{
nsDetector det = new nsDetector( nsPSMDetector.ALL );
det.Init( new nsICharsetDetectionObserver()
{
public void Notify( String charset )
{
FileCharsetDetector.this.charset = charset;
FileCharsetDetector.this.found = true;
}
} );
FileInputStream fileInputStream = new FileInputStream( detectedFile );
BufferedInputStream imp = new BufferedInputStream( fileInputStream );
try
{
byte[] buf = new byte[1024];
int len;
boolean done = false;
boolean isAscii = true;
while ( ( len = imp.read( buf, 0, buf.length ) ) != -1 )
{
// Check if the stream is only ascii.
if ( isAscii )
{
isAscii = det.isAscii( buf, len );
}
// DoIt if non-ascii and not done yet.
if ( !isAscii && !done )
{
done = det.DoIt( buf, len, false );
found = done;
}
}
det.DataEnd();
if ( !isFound() )
{
String[] prob = det.getProbableCharsets();
if ( prob.length > 0 )
{
charset = prob[0];
}
}
if ( isAscii )
{
charset = "ASCII";
}
}
finally
{
imp.close();
fileInputStream.close();
}
}
public FileCharsetDetector( InputStream detectedStream )
throws FileNotFoundException, IOException
{
nsDetector det = new nsDetector( nsPSMDetector.ALL );
det.Init( new nsICharsetDetectionObserver()
{
public void Notify( String charset )
{
FileCharsetDetector.this.charset = charset;
FileCharsetDetector.this.found = true;
}
} );
BufferedInputStream imp = new BufferedInputStream( detectedStream );
byte[] buf = new byte[1024];
int len;
boolean done = false;
boolean isAscii = true;
while ( ( len = imp.read( buf, 0, buf.length ) ) != -1 )
{
// Check if the stream is only ascii.
if ( isAscii )
{
isAscii = det.isAscii( buf, len );
}
// DoIt if non-ascii and not done yet.
if ( !isAscii && !done )
{
done = det.DoIt( buf, len, false );
found = done;
}
}
det.DataEnd();
if ( !isFound() )
{
String[] prob = det.getProbableCharsets();
if ( prob.length > 0 )
{
charset = prob[0];
}
}
if ( isAscii )
{
charset = "ASCII";
}
}
public String getCharset()
{
return charset;
}
public boolean isFound()
{
return found;
}
}