package org.apache.lucene.analysis.payloads;
/*
* 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.apache.lucene.analysis.TokenStream;
import org.apache.lucene.analysis.payloads.DelimitedPayloadTokenFilter;
import org.apache.lucene.analysis.payloads.PayloadEncoder;
import org.apache.lucene.analysis.payloads.FloatEncoder;
import org.apache.lucene.analysis.payloads.IntegerEncoder;
import org.apache.lucene.analysis.payloads.IdentityEncoder;
import org.apache.lucene.analysis.util.ResourceLoader;
import org.apache.lucene.analysis.util.ResourceLoaderAware;
import org.apache.lucene.analysis.util.TokenFilterFactory;
import java.util.Map;
/**
*
* Factory for {@link DelimitedPayloadTokenFilter}.
* <pre class="prettyprint" >
* <fieldType name="text_dlmtd" class="solr.TextField" positionIncrementGap="100">
* <analyzer>
* <tokenizer class="solr.WhitespaceTokenizerFactory"/>
* <filter class="solr.DelimitedPayloadTokenFilterFactory" encoder="float" delimiter="|"/>
* </analyzer>
* </fieldType></pre>
*
*
*/
public class DelimitedPayloadTokenFilterFactory extends TokenFilterFactory implements ResourceLoaderAware {
public static final String ENCODER_ATTR = "encoder";
public static final String DELIMITER_ATTR = "delimiter";
private PayloadEncoder encoder;
private char delimiter = '|';
@Override
public DelimitedPayloadTokenFilter create(TokenStream input) {
return new DelimitedPayloadTokenFilter(input, delimiter, encoder);
}
@Override
public void init(Map<String, String> args) {
super.init(args);
}
@Override
public void inform(ResourceLoader loader) {
String encoderClass = args.get(ENCODER_ATTR);
if (encoderClass == null) {
throw new IllegalArgumentException("Parameter " + ENCODER_ATTR + " is mandatory");
}
if (encoderClass.equals("float")){
encoder = new FloatEncoder();
} else if (encoderClass.equals("integer")){
encoder = new IntegerEncoder();
} else if (encoderClass.equals("identity")){
encoder = new IdentityEncoder();
} else {
encoder = loader.newInstance(encoderClass, PayloadEncoder.class);
}
String delim = args.get(DELIMITER_ATTR);
if (delim != null){
if (delim.length() == 1) {
delimiter = delim.charAt(0);
} else{
throw new IllegalArgumentException("Delimiter must be one character only");
}
}
}
}