| /* |
| * 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(); |
| } |
| |
| } |