/*
* 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.elasticsearch.index.fielddata.AtomicFieldData;
import org.elasticsearch.index.fielddata.AtomicNumericFieldData;
import org.elasticsearch.index.fielddata.IndexFieldData;
import java.io.IOException;
import java.util.Map;
/**
* A {@link ValueSource} wrapper for field data.
*/
class FieldDataValueSource extends ValueSource {
IndexFieldData<?> fieldData;
FieldDataValueSource(IndexFieldData<?> d) {
fieldData = d;
}
@Override
public FunctionValues getValues(Map context, LeafReaderContext leaf) throws IOException {
AtomicFieldData leafData = fieldData.load(leaf);
assert(leafData instanceof AtomicNumericFieldData);
return new FieldDataFunctionValues(this, (AtomicNumericFieldData)leafData);
}
@Override
public boolean equals(Object other) {
return fieldData.equals(other);
}
@Override
public int hashCode() {
return fieldData.hashCode();
}
@Override
public String description() {
return "field(" + fieldData.getFieldNames().toString() + ")";
}
}