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* 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.search.aggregations.support.values;
import org.elasticsearch.index.fielddata.SortingNumericDoubleValues;
import org.elasticsearch.script.SearchScript;
import org.elasticsearch.search.aggregations.AggregationExecutionException;
import org.elasticsearch.search.aggregations.support.ScriptValues;
import java.lang.reflect.Array;
import java.util.Collection;
import java.util.Iterator;
/**
* {@link DoubleValues} implementation which is based on a script
*/
public class ScriptDoubleValues extends SortingNumericDoubleValues implements ScriptValues {
final SearchScript script;
public ScriptDoubleValues(SearchScript script) {
super();
this.script = script;
}
@Override
public SearchScript script() {
return script;
}
@Override
public void setDocument(int docId) {
script.setNextDocId(docId);
final Object value = script.run();
if (value == null) {
count = 0;
}
else if (value instanceof Number) {
count = 1;
values[0] = ((Number) value).doubleValue();
}
else if (value.getClass().isArray()) {
count = Array.getLength(value);
grow();
for (int i = 0; i < count; ++i) {
values[i] = ((Number) Array.get(value, i)).doubleValue();
}
}
else if (value instanceof Collection) {
count = ((Collection<?>) value).size();
grow();
int i = 0;
for (Iterator<?> it = ((Collection<?>) value).iterator(); it.hasNext(); ++i) {
values[i] = ((Number) it.next()).doubleValue();
}
assert i == count;
}
else {
throw new AggregationExecutionException("Unsupported script value [" + value + "]");
}
sort();
}
}