/**
* Copyright 2007 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.
*/
package com.sohospace.lucene.analysis.xanalyzer;
import java.io.Reader;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.TokenStream;
import com.sohospace.lucene.analysis.xanalyzer.collector.QueryTokenCollector;
import com.sohospace.lucene.analysis.xanalyzer.collector.WriterTokenCollector;
import com.sohospace.paoding.Knife;
import com.sohospace.paoding.Paoding;
import com.sohospace.paoding.cjk.CJKKnife;
/**
* XAnalyzer�ǻ��ڡ��Ҷ���ţ����ܵ�Lucene������������ǡ��Ҷ���ţ����ܶ�Lucene����������
* <p>
*
* XAnalyzer���̰߳�ȫ�ģ����������ʹ��ͬһ��XAnalyzerʵ���ǿ��еġ�<br>
* XAnalyzer�ǿɸ��õģ��Ƽ����ͬһ��XAnalyzerʵ����
* <p>
*
* ������Ҫ�ر������Ӧͨ�����캯����knife������(setter)�����Զ��Ƶ�Knifeʵ����
* <p>
*
* @author Zhiliang Wang [qieqie.wang@gmail.com]
*
* @see XWriterAnalyzer
* @see XQueryAnalyzer
*
* @see XTokenizer
* @see Knife
* @see Paoding
* @see CJKKnife
* @see TokenCollector
*
* @since 1.0
*
*/
public class XAnalyzer extends Analyzer {
// -------------------------------------------------
/**
* ��ģʽ�ڽ�������ʱʹ�ã��ܹ�ʹ��������ÿ�����ܵĴ��ｨ������
*/
public static final int WRITER_MODE = 1;
/**
* ��ģʽ���û�����ʱʹ�ã�ʹ�û������Ľ��ƥ������
*/
public static final int QUERY_MODE = 2;
// -------------------------------------------------
/**
* ������XTokenizer�ṩ���ֽ��ı��ַ�
*
* @see XTokenizer#next()
*
*/
private Knife knife;
/**
* @see #WRITER_MODE
* @see #QUERY_MODE
*/
private int mode = WRITER_MODE;
// -------------------------------------------------
public XAnalyzer() {
}
public XAnalyzer(Knife knife) {
this.knife = knife;
}
// -------------------------------------------------
public Knife getKnife() {
return knife;
}
public void setKnife(Knife knife) {
this.knife = knife;
}
public int getMode() {
return mode;
}
/**
* ���÷�����ģʽ��дģʽ(WRITER_MODE)�����ģʽ(QUERY_MODE)����һ�֡�Ĭ��Ϊдģʽ��
* <p>
* WRITER_MODE�ڽ�������ʱʹ�ã��ܹ�ʹ��������ÿ�����ܵĴ��ｨ������<br>
* QUERY_MODE���û�����ʱʹ�ã�ʹ�û������Ľ��ƥ������
*
* @param mode
*/
public void setMode(int mode) {
this.mode = mode;
}
// -------------------------------------------------
@Override
public TokenStream tokenStream(String fieldName, Reader reader) {
if (knife == null) {
throw new NullPointerException("knife should be set before token");
}
// XTokenizer��TokenStreamʵ�֣�ʹ��knife����reader������ı�
return new XTokenizer(reader, knife, createTokenCollector());
}
protected TokenCollector createTokenCollector() {
switch (mode) {
case WRITER_MODE:
return new WriterTokenCollector();
case QUERY_MODE:
return new QueryTokenCollector();
default:
throw new IllegalArgumentException("wrong mode");
}
}
}