org.elasticsearch.search.facet.terms.strings.HashedScriptAggregator Maven / Gradle / Ivy
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* Licensed to ElasticSearch and Shay Banon under one
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* 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,
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package org.elasticsearch.search.facet.terms.strings;
import com.google.common.collect.ImmutableSet;
import org.apache.lucene.util.BytesRef;
import org.apache.lucene.util.CharsRef;
import org.apache.lucene.util.UnicodeUtil;
import org.elasticsearch.index.fielddata.BytesValues;
import org.elasticsearch.script.SearchScript;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public final class HashedScriptAggregator extends HashedAggregator {
private final ImmutableSet excluded;
private final Matcher matcher;
private final SearchScript script;
private final CharsRef spare = new CharsRef();
private final BytesRef scriptSpare = new BytesRef();
private final boolean convert;
public HashedScriptAggregator(ImmutableSet excluded, Pattern pattern, SearchScript script) {
this.excluded = excluded;
this.matcher = pattern != null ? pattern.matcher("") : null;
this.script = script;
this.convert = script != null || matcher != null;
}
@Override
public void addValue(BytesRef value, int hashCode, BytesValues values) {
if (accept(value)) {
super.addValue(value, hashCode, values);
}
}
private boolean accept(BytesRef value) {
if (excluded != null && excluded.contains(value)) {
return false;
}
if(convert) {
// only convert if we need to and only once per doc...
UnicodeUtil.UTF8toUTF16(value, spare);
if (matcher != null) {
assert convert : "regexp: [convert == false] but should be true";
assert value.utf8ToString().equals(spare.toString()) : "not converted";
return matcher.reset(spare).matches();
}
}
return true;
}
@Override
protected void onValue(int docId, BytesRef value, int hashCode, BytesValues values) {
if (accept(value)) {
if (script != null) {
assert convert : "script: [convert == false] but should be true";
assert value.utf8ToString().equals(spare.toString()) : "not converted";
script.setNextDocId(docId);
// LUCENE 4 UPGRADE: needs optimization -- maybe a CharSequence
// does the job here?
// we only creat that string if we really need
script.setNextVar("term", spare.toString());
Object scriptValue = script.run();
if (scriptValue == null) {
return;
}
if (scriptValue instanceof Boolean) {
if (!((Boolean) scriptValue)) {
return;
}
} else {
// LUCENE 4 UPGRADE: should be possible to convert directly
// to BR
scriptSpare.copyChars(scriptValue.toString());
hashCode = scriptSpare.hashCode();
super.onValue(docId, scriptSpare, hashCode, values);
return;
}
}
assert convert || (matcher == null && script == null);
super.onValue(docId, value, hashCode, values);
}
}
}