org.apache.lucene.queries.function.valuesource.FieldCacheSource Maven / Gradle / Ivy
/*
* 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.queries.function.valuesource;
import org.apache.lucene.queries.function.ValueSource;
/**
* A base class for ValueSource implementations that retrieve values for a single field from
* DocValues.
*/
public abstract class FieldCacheSource extends ValueSource {
protected final String field;
public FieldCacheSource(String field) {
this.field = field;
}
public String getField() {
return field;
}
@Override
public String description() {
return field;
}
@Override
public boolean equals(Object o) {
if (!(o instanceof FieldCacheSource)) return false;
FieldCacheSource other = (FieldCacheSource) o;
return this.field.equals(other.field);
}
@Override
public int hashCode() {
return field.hashCode();
}
}