/*
* 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.queries.function.FunctionValues;
import org.apache.lucene.queries.function.docvalues.FloatDocValues;
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.MutableValueFloat;
/**
* 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 FloatFieldSource extends FieldCacheSource {
protected final FieldCache.FloatParser parser;
public FloatFieldSource(String field) {
this(field, null);
}
public FloatFieldSource(String field, FieldCache.FloatParser parser) {
super(field);
this.parser = parser;
}
@Override
public String description() {
return "float(" + field + ')';
}
@Override
public FunctionValues getValues(Map context, AtomicReaderContext readerContext) throws IOException {
final FieldCache.Floats arr = cache.getFloats(readerContext.reader(), field, parser, true);
final Bits valid = cache.getDocsWithField(readerContext.reader(), field);
return new FloatDocValues(this) {
@Override
public float floatVal(int doc) {
return arr.get(doc);
}
@Override
public Object objectVal(int doc) {
return valid.get(doc) ? arr.get(doc) : null;
}
@Override
public boolean exists(int doc) {
return arr.get(doc) != 0 || valid.get(doc);
}
@Override
public ValueFiller getValueFiller() {
return new ValueFiller() {
private final MutableValueFloat mval = new MutableValueFloat();
@Override
public MutableValue getValue() {
return mval;
}
@Override
public void fillValue(int doc) {
mval.value = arr.get(doc);
mval.exists = mval.value != 0 || valid.get(doc);
}
};
}
};
}
@Override
public boolean equals(Object o) {
if (o.getClass() != FloatFieldSource.class) return false;
FloatFieldSource other = (FloatFieldSource)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 ? Float.class.hashCode() : parser.getClass().hashCode();
h += super.hashCode();
return h;
}
}