org.mozilla.universalchardet.prober.MBCSGroupProber Maven / Gradle / Ivy
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Universal charset detector code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Shy Shalom
* Kohei TAKETA (Java port)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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* decision by deleting the provisions above and replace them with the notice
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* ***** END LICENSE BLOCK ***** */
package org.mozilla.universalchardet.prober;
import java.util.ArrayList;
import java.util.List;
public class MBCSGroupProber extends CharsetProber
{
////////////////////////////////////////////////////////////////
// fields
////////////////////////////////////////////////////////////////
private ProbingState state;
private List probers = new ArrayList<>();
private CharsetProber bestGuess;
private int activeNum;
////////////////////////////////////////////////////////////////
// methods
////////////////////////////////////////////////////////////////
public MBCSGroupProber() {
super();
probers.add(new UTF8Prober());
probers.add(new SJISProber());
probers.add(new EUCJPProber());
probers.add(new EUCKRProber());
probers.add(new Big5Prober());
probers.add(new EUCTWProber());
reset();
}
@Override
public String getCharSetName() {
if (this.bestGuess == null) {
getConfidence();
if (this.bestGuess == null) {
this.bestGuess = probers.get(0);
}
}
return this.bestGuess.getCharSetName();
}
@Override
public float getConfidence()
{
float bestConf = 0.0f;
float cf;
if (this.state == ProbingState.FOUND_IT) {
return 0.99f;
} else if (this.state == ProbingState.NOT_ME) {
return 0.01f;
} else {
for(CharsetProber prober: probers) {
if (!prober.isActive()) {
continue;
}
cf = prober.getConfidence();
if (bestConf < cf) {
bestConf = cf;
this.bestGuess = prober;
}
}
}
return bestConf;
}
@Override
public ProbingState getState()
{
return this.state;
}
@Override
public ProbingState handleData(byte[] buf, int offset, int length)
{
ProbingState st;
boolean keepNext = true;
byte[] highbyteBuf = new byte[length];
int highpos = 0;
int maxPos = offset + length;
for (int i=offset; i