otis 2004/03/02 04:52:16
Added: contributions/analyzers/src/java/org/apache/lucene/analysis
LengthFilter.java
Log:
- Initial commit.
Contribution from David Spencer.
Revision Changes Path
1.1
jakarta-lucene-sandbox/contributions/analyzers/src/java/org/apache/lucene/analysis/LengthFilter.java
Index: LengthFilter.java
===================================================================
package org.apache.lucene.analysis;
/**
* Copyright 2004 The Apache Software Foundation
*
* Licensed 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 java.io.IOException;
/**
* Removes words that are too long and too short from the stream.
*
* @author David Spencer
* @version $Id: LengthFilter.java,v 1.1 2004/03/02 12:52:16 otis Exp $
*/
public final class LengthFilter extends TokenFilter {
final int min;
final int max;
/**
* Build a filter that removes words that are too long or too
* short from the text.
*/
public LengthFilter(TokenStream in, int min, int max)
{
input = in;
this.min = min;
this.max =max;
}
/**
* Returns the next input Token whose termText() is the right len
*/
public final Token next() throws IOException
{
// return the first non-stop word found
for (Token token = input.next(); token != null; token = input.next())
{
int len = token.termText().length();
if ( len >= min && len <= max) {
return token;
}
// note: else we ignore it but should we index each part of it?
}
// reached EOS -- return null
return null;
}
}
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