| /* |
| * 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; |
| import org.apache.lucene.search.IndexSearcher; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| /** A function with a single argument |
| */ |
| public abstract class SingleFunction extends ValueSource { |
| protected final ValueSource source; |
| |
| public SingleFunction(ValueSource source) { |
| this.source = source; |
| } |
| |
| protected abstract String name(); |
| |
| @Override |
| public String description() { |
| return name() + '(' + source.description() + ')'; |
| } |
| |
| @Override |
| public int hashCode() { |
| return source.hashCode() + name().hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this.getClass() != o.getClass()) return false; |
| SingleFunction other = (SingleFunction)o; |
| return this.name().equals(other.name()) |
| && this.source.equals(other.source); |
| } |
| |
| @Override |
| public void createWeight(Map context, IndexSearcher searcher) throws IOException { |
| source.createWeight(context, searcher); |
| } |
| } |