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Scripts: Make ScoreAccessor utility available for other script engines.
With the removal of setNextScore in #6864, script engines must use the Scorer to find the score of a document. The DocLookup is updated appropriately to do this, but most script engines require a Number to be bound for numeric variables. Groovy already had an encapsulation for this funtionality, and this moves it out to be shared with other script engines. closes #6898
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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. | ||
*/ | ||
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package org.elasticsearch.script; | ||
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import org.elasticsearch.search.lookup.DocLookup; | ||
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import java.io.IOException; | ||
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/** | ||
* A float encapsulation that dynamically accesses the score of a document. | ||
* | ||
* The provided {@link DocLookup} is used to retrieve the score | ||
* for the current document. | ||
*/ | ||
public final class ScoreAccessor extends Number { | ||
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final DocLookup doc; | ||
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public ScoreAccessor(DocLookup d) { | ||
doc = d; | ||
} | ||
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float score() { | ||
try { | ||
return doc.score(); | ||
} catch (IOException e) { | ||
throw new RuntimeException("Could not get score", e); | ||
} | ||
} | ||
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@Override | ||
public int intValue() { | ||
return (int)score(); | ||
} | ||
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@Override | ||
public long longValue() { | ||
return (long)score(); | ||
} | ||
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@Override | ||
public float floatValue() { | ||
return score(); | ||
} | ||
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@Override | ||
public double doubleValue() { | ||
return score(); | ||
} | ||
} |
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