org.elasticsearch.common.lucene.search.ResolvableFilter Maven / Gradle / Ivy
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* 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
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*/
package org.elasticsearch.common.lucene.search;
import org.apache.lucene.index.AtomicReaderContext;
import org.apache.lucene.search.DocIdSet;
import org.apache.lucene.search.Filter;
import org.apache.lucene.util.Bits;
import java.io.IOException;
/**
* A filter implementation that resolves details at the last possible moment between filter parsing and execution.
* For example a date filter based on 'now'.
*/
public abstract class ResolvableFilter extends Filter {
/**
* @return The actual filter instance to be executed containing the latest details.
*/
public abstract Filter resolve();
@Override
public DocIdSet getDocIdSet(AtomicReaderContext context, Bits acceptDocs) throws IOException {
Filter resolvedFilter = resolve();
if (resolvedFilter != null) {
return resolvedFilter.getDocIdSet(context, acceptDocs);
} else {
return null;
}
}
}