/*
* 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.lucene.queries.function.valuesource;
import java.io.IOException;
import java.util.Map;
import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.queries.function.FunctionValues;
import org.apache.lucene.queries.function.ValueSourceScorer;
import org.apache.lucene.queries.function.docvalues.DoubleDocValues;
import org.apache.lucene.search.FieldCache;
import org.apache.lucene.util.Bits;
import org.apache.lucene.util.mutable.MutableValue;
import org.apache.lucene.util.mutable.MutableValueDouble;
/**
* Obtains float field values from the {@link org.apache.lucene.search.FieldCache}
* using <code>getFloats()</code>
* and makes those values available as other numeric types, casting as needed.
*
*
*/
public class DoubleFieldSource extends FieldCacheSource {
protected final FieldCache.DoubleParser parser;
public DoubleFieldSource(String field) {
this(field, null);
}
public DoubleFieldSource(String field, FieldCache.DoubleParser parser) {
super(field);
this.parser = parser;
}
@Override
public String description() {
return "double(" + field + ')';
}
@Override
public FunctionValues getValues(Map context, AtomicReaderContext readerContext) throws IOException {
final FieldCache.Doubles arr = cache.getDoubles(readerContext.reader(), field, parser, true);
final Bits valid = cache.getDocsWithField(readerContext.reader(), field);
return new DoubleDocValues(this) {
@Override
public double doubleVal(int doc) {
return arr.get(doc);
}
@Override
public boolean exists(int doc) {
return valid.get(doc);
}
@Override
public ValueSourceScorer getRangeScorer(IndexReader reader, String lowerVal, String upperVal, boolean includeLower, boolean includeUpper) {
double lower,upper;
if (lowerVal==null) {
lower = Double.NEGATIVE_INFINITY;
} else {
lower = Double.parseDouble(lowerVal);
}
if (upperVal==null) {
upper = Double.POSITIVE_INFINITY;
} else {
upper = Double.parseDouble(upperVal);
}
final double l = lower;
final double u = upper;
if (includeLower && includeUpper) {
return new ValueSourceScorer(reader, this) {
@Override
public boolean matchesValue(int doc) {
double docVal = doubleVal(doc);
return docVal >= l && docVal <= u;
}
};
}
else if (includeLower && !includeUpper) {
return new ValueSourceScorer(reader, this) {
@Override
public boolean matchesValue(int doc) {
double docVal = doubleVal(doc);
return docVal >= l && docVal < u;
}
};
}
else if (!includeLower && includeUpper) {
return new ValueSourceScorer(reader, this) {
@Override
public boolean matchesValue(int doc) {
double docVal = doubleVal(doc);
return docVal > l && docVal <= u;
}
};
}
else {
return new ValueSourceScorer(reader, this) {
@Override
public boolean matchesValue(int doc) {
double docVal = doubleVal(doc);
return docVal > l && docVal < u;
}
};
}
}
@Override
public ValueFiller getValueFiller() {
return new ValueFiller() {
private final MutableValueDouble mval = new MutableValueDouble();
@Override
public MutableValue getValue() {
return mval;
}
@Override
public void fillValue(int doc) {
mval.value = arr.get(doc);
mval.exists = valid.get(doc);
}
};
}
};
}
@Override
public boolean equals(Object o) {
if (o.getClass() != DoubleFieldSource.class) return false;
DoubleFieldSource other = (DoubleFieldSource) o;
return super.equals(other)
&& (this.parser == null ? other.parser == null :
this.parser.getClass() == other.parser.getClass());
}
@Override
public int hashCode() {
int h = parser == null ? Double.class.hashCode() : parser.getClass().hashCode();
h += super.hashCode();
return h;
}
}