/**
* 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.
*/
package org.apache.solr.schema;
import org.apache.lucene.search.SortField;
import org.apache.solr.search.QParser;
import org.apache.solr.search.function.ValueSource;
import org.apache.solr.search.function.OrdFieldSource;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.document.Fieldable;
import org.apache.solr.response.TextResponseWriter;
import org.apache.solr.response.XMLWriter;
import org.apache.solr.analysis.SolrAnalyzer;
import java.util.Map;
import java.io.Reader;
import java.io.IOException;
/**
* @version $Id: BoolField.java 1071480 2011-02-17 02:23:10Z hossman $
*/
public class BoolField extends FieldType {
@Override
protected void init(IndexSchema schema, Map<String,String> args) {
}
@Override
public SortField getSortField(SchemaField field,boolean reverse) {
field.checkSortability();
return getStringSort(field,reverse);
}
@Override
public ValueSource getValueSource(SchemaField field, QParser qparser) {
field.checkFieldCacheSource(qparser);
return new OrdFieldSource(field.name);
}
// avoid instantiating every time...
protected final static char[] TRUE_TOKEN = {'T'};
protected final static char[] FALSE_TOKEN = {'F'};
////////////////////////////////////////////////////////////////////////
// TODO: look into creating my own queryParser that can more efficiently
// handle single valued non-text fields (int,bool,etc) if needed.
protected final static Analyzer boolAnalyzer = new SolrAnalyzer() {
@Override
public TokenStreamInfo getStream(String fieldName, Reader reader) {
Tokenizer tokenizer = new Tokenizer(reader) {
final CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
boolean done = false;
@Override
public void reset(Reader input) throws IOException {
done = false;
super.reset(input);
}
@Override
public boolean incrementToken() throws IOException {
clearAttributes();
if (done) return false;
done = true;
int ch = input.read();
if (ch==-1) return false;
termAtt.copyBuffer(
((ch=='t' || ch=='T' || ch=='1') ? TRUE_TOKEN : FALSE_TOKEN)
,0,1);
return true;
}
};
return new TokenStreamInfo(tokenizer, tokenizer);
}
};
@Override
public Analyzer getAnalyzer() {
return boolAnalyzer;
}
@Override
public Analyzer getQueryAnalyzer() {
return boolAnalyzer;
}
@Override
public String toInternal(String val) {
char ch = (val!=null && val.length()>0) ? val.charAt(0) : 0;
return (ch=='1' || ch=='t' || ch=='T') ? "T" : "F";
}
@Override
public String toExternal(Fieldable f) {
return indexedToReadable(f.stringValue());
}
@Override
public Boolean toObject(Fieldable f) {
return Boolean.valueOf( toExternal(f) );
}
@Override
public String indexedToReadable(String indexedForm) {
char ch = indexedForm.charAt(0);
return ch=='T' ? "true" : "false";
}
@Override
public void write(XMLWriter xmlWriter, String name, Fieldable f) throws IOException {
xmlWriter.writeBool(name, f.stringValue().charAt(0) =='T');
}
@Override
public void write(TextResponseWriter writer, String name, Fieldable f) throws IOException {
writer.writeBool(name, f.stringValue().charAt(0) =='T');
}
}