/*
* 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 java.io.IOException;
import java.io.Reader;
import java.util.Map;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.Tokenizer;
import org.apache.lucene.analysis.tokenattributes.CharTermAttribute;
import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.index.SortedDocValues;
import org.apache.lucene.index.StorableField;
import org.apache.solr.search.QueryContext;
import org.apache.solr.search.function.FuncValues;
import org.apache.solr.search.function.ValueSource;
import org.apache.solr.search.function.funcvalues.BoolFuncValues;
import org.apache.solr.search.function.valuesource.OrdFieldSource;
import org.apache.lucene.search.FieldCache;
import org.apache.lucene.search.SortField;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.CharsRef;
import org.apache.solr.search.mutable.MutableValue;
import org.apache.solr.search.mutable.MutableValueBool;
import org.apache.solr.analysis.SolrAnalyzer;
import org.apache.solr.response.TextResponseWriter;
import org.apache.solr.search.QParser;
/**
*
*/
public class BoolField extends PrimitiveFieldType {
@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 BoolFieldSource(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 TokenStreamComponents createComponents(String fieldName) {
Tokenizer tokenizer = new Tokenizer() {
final CharTermAttribute termAtt = addAttribute(CharTermAttribute.class);
boolean done = false;
@Override
public void reset() throws IOException {
super.reset();
done = false;
}
@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 TokenStreamComponents(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(StorableField f) {
return indexedToReadable(f.stringValue());
}
@Override
public Boolean toObject(StorableField f) {
return Boolean.valueOf( toExternal(f) );
}
@Override
public Object toObject(SchemaField sf, BytesRef term) {
return term.bytes[term.offset] == 'T';
}
@Override
public String indexedToReadable(String indexedForm) {
char ch = indexedForm.charAt(0);
return ch=='T' ? "true" : "false";
}
private static final CharsRef TRUE = new CharsRef("true");
private static final CharsRef FALSE = new CharsRef("false");
@Override
public CharsRef indexedToReadable(BytesRef input, CharsRef charsRef) {
if (input.length > 0 && input.bytes[input.offset] == 'T') {
charsRef.copyChars(TRUE);
} else {
charsRef.copyChars(FALSE);
}
return charsRef;
}
@Override
public void write(TextResponseWriter writer, String name, StorableField f) throws IOException {
writer.writeBool(name, f.stringValue().charAt(0) == 'T');
}
}
// TODO - this can be much more efficient - use OpenBitSet or Bits
class BoolFieldSource extends ValueSource {
protected String field;
public BoolFieldSource(String field) {
this.field = field;
}
@Override
public String description() {
return "bool(" + field + ')';
}
@Override
public FuncValues getValues(QueryContext context, AtomicReaderContext readerContext) throws IOException {
final SortedDocValues sindex = FieldCache.DEFAULT.getTermsIndex(readerContext.reader(), field);
// figure out what ord maps to true
int nord = sindex.getValueCount();
BytesRef br = new BytesRef();
// if no values in the segment, default trueOrd to something other then -1 (missing)
int tord = -2;
for (int i=0; i<nord; i++) {
sindex.lookupOrd(i, br);
if (br.length==1 && br.bytes[br.offset]=='T') {
tord = i;
break;
}
}
final int trueOrd = tord;
return new BoolFuncValues(this) {
@Override
public boolean boolVal(int doc) {
return sindex.getOrd(doc) == trueOrd;
}
@Override
public boolean exists(int doc) {
return sindex.getOrd(doc) != -1;
}
@Override
public ValueFiller getValueFiller() {
return new ValueFiller() {
private final MutableValueBool mval = new MutableValueBool();
@Override
public MutableValue getValue() {
return mval;
}
@Override
public void fillValue(int doc) {
int ord = sindex.getOrd(doc);
mval.value = (ord == trueOrd);
mval.exists = (ord != -1);
}
};
}
};
}
@Override
public boolean equals(Object o) {
return o.getClass() == BoolFieldSource.class && this.field.equals(((BoolFieldSource)o).field);
}
private static final int hcode = OrdFieldSource.class.hashCode();
@Override
public int hashCode() {
return hcode + field.hashCode();
};
}