org.elasticsearch.script.FilterScript Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* 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;
import java.io.IOException;
import java.util.Map;
import org.apache.lucene.index.LeafReaderContext;
import org.elasticsearch.index.fielddata.ScriptDocValues;
import org.elasticsearch.search.lookup.LeafSearchLookup;
import org.elasticsearch.search.lookup.SearchLookup;
/**
* A script implementation of a query filter.
* See {@link org.elasticsearch.index.query.ScriptQueryBuilder}.
*/
public abstract class FilterScript {
// no parameters for execute, but constant still required...
public static final String[] PARAMETERS = {};
/** The generic runtime parameters for the script. */
private final Map params;
/** A leaf lookup for the bound segment this script will operate on. */
private final LeafSearchLookup leafLookup;
public FilterScript(Map params, SearchLookup lookup, LeafReaderContext leafContext) {
this.params = params;
this.leafLookup = lookup.getLeafSearchLookup(leafContext);
}
/** Return {@code true} if the current document matches the filter, or {@code false} otherwise. */
public abstract boolean execute();
/** Return the parameters for this script. */
public Map getParams() {
return params;
}
/** The doc lookup for the Lucene segment this script was created for. */
public final Map> getDoc() {
return leafLookup.doc();
}
/** Set the current document to run the script on next. */
public void setDocument(int docid) {
leafLookup.setDocument(docid);
}
/** A factory to construct {@link FilterScript} instances. */
public interface LeafFactory {
FilterScript newInstance(LeafReaderContext ctx) throws IOException;
}
/** A factory to construct stateful {@link FilterScript} factories for a specific index. */
public interface Factory extends ScriptFactory {
LeafFactory newFactory(Map params, SearchLookup lookup);
}
/** The context used to compile {@link FilterScript} factories. */
public static final ScriptContext CONTEXT = new ScriptContext<>("filter", Factory.class);
}