/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF 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.apache.lucene.search;
import java.io.IOException;
import org.apache.lucene.index.LeafReaderContext;
/**
* Base {@link FieldComparator} implementation that is used for all contexts.
*
* @lucene.experimental
*/
public abstract class SimpleFieldComparator<T> extends FieldComparator<T> implements LeafFieldComparator {
/** This method is called before collecting <code>context</code>. */
protected abstract void doSetNextReader(LeafReaderContext context) throws IOException;
@Override
public final LeafFieldComparator getLeafComparator(LeafReaderContext context) throws IOException {
doSetNextReader(context);
return this;
}
@Override
public void setScorer(Scorer scorer) throws IOException {}
}