/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.script.expression;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.queries.function.FunctionValues;
import org.apache.lucene.queries.function.ValueSource;
import org.apache.lucene.queries.function.docvalues.DoubleDocValues;
import java.io.IOException;
import java.util.Map;
/**
* A {@link ValueSource} which has a stub {@link FunctionValues} that holds a dynamically replaceable constant double.
*/
class ReplaceableConstValueSource extends ValueSource {
double value;
final FunctionValues fv;
public ReplaceableConstValueSource() {
fv = new DoubleDocValues(this) {
@Override
public double doubleVal(int i) {
return value;
}
};
}
@Override
public FunctionValues getValues(Map map, LeafReaderContext atomicReaderContext) throws IOException {
return fv;
}
@Override
public boolean equals(Object o) {
return o == this;
}
@Override
public int hashCode() {
return System.identityHashCode(this);
}
@Override
public String description() {
return "replaceableConstDouble";
}
public void setValue(double v) {
value = v;
}
}