| /* |
| * 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.index.LeafReaderContext; |
| import org.apache.lucene.queries.function.FunctionValues; |
| import org.apache.lucene.queries.function.ValueSource; |
| import org.apache.lucene.search.IndexSearcher; |
| |
| import java.io.IOException; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * Abstract parent class for {@link ValueSource} implementations that wrap multiple |
| * ValueSources and apply their own logic. |
| */ |
| public abstract class MultiFunction extends ValueSource { |
| protected final List<ValueSource> sources; |
| |
| public MultiFunction(List<ValueSource> sources) { |
| this.sources = sources; |
| } |
| |
| abstract protected String name(); |
| |
| @Override |
| public String description() { |
| return description(name(), sources); |
| } |
| |
| /** |
| * Helper utility for {@link FunctionValues} |
| * |
| * @return true if <em>all</em> of the specified <code>values</code> |
| * {@link FunctionValues#exists} for the specified doc, else false. |
| */ |
| public static boolean allExists(int doc, FunctionValues[] values) throws IOException { |
| for (FunctionValues v : values) { |
| if ( ! v.exists(doc) ) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /** |
| * Helper utility for {@link FunctionValues} |
| * |
| * @return true if <em>any</em> of the specified <code>values</code> |
| * {@link FunctionValues#exists} for the specified doc, else false. |
| */ |
| public static boolean anyExists(int doc, FunctionValues[] values) throws IOException { |
| for (FunctionValues v : values) { |
| if ( v.exists(doc) ) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Equivalent to the {@code FunctionValues[]} method with the same name, but optimized for |
| * dealing with exactly 2 arguments. |
| * |
| * @return true if <em>both</em> of the specified <code>values</code> |
| * {@link FunctionValues#exists} for the specified doc, else false. |
| * @see #anyExists(int,FunctionValues[]) |
| */ |
| public static boolean allExists(int doc, FunctionValues values1, FunctionValues values2) throws IOException { |
| return values1.exists(doc) && values2.exists(doc); |
| } |
| |
| /** |
| * Equivalent to the {@code FunctionValues[]} method with the same name, but optimized for |
| * dealing with exactly 2 arguments. |
| * |
| * @return true if <em>either</em> of the specified <code>values</code> |
| * {@link FunctionValues#exists} for the specified doc, else false. |
| * @see #anyExists(int,FunctionValues[]) |
| */ |
| public static boolean anyExists(int doc, FunctionValues values1, FunctionValues values2) throws IOException { |
| return values1.exists(doc) || values2.exists(doc); |
| } |
| |
| public static String description(String name, List<ValueSource> sources) { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(name).append('('); |
| boolean firstTime=true; |
| for (ValueSource source : sources) { |
| if (firstTime) { |
| firstTime=false; |
| } else { |
| sb.append(','); |
| } |
| sb.append(source); |
| } |
| sb.append(')'); |
| return sb.toString(); |
| } |
| |
| public static FunctionValues[] valsArr(List<ValueSource> sources, Map fcontext, LeafReaderContext readerContext) throws IOException { |
| final FunctionValues[] valsArr = new FunctionValues[sources.size()]; |
| int i=0; |
| for (ValueSource source : sources) { |
| valsArr[i++] = source.getValues(fcontext, readerContext); |
| } |
| return valsArr; |
| } |
| |
| public class Values extends FunctionValues { |
| final FunctionValues[] valsArr; |
| |
| public Values(FunctionValues[] valsArr) { |
| this.valsArr = valsArr; |
| } |
| |
| @Override |
| public String toString(int doc) throws IOException { |
| return MultiFunction.toString(name(), valsArr, doc); |
| } |
| |
| @Override |
| public ValueFiller getValueFiller() { |
| // TODO: need ValueSource.type() to determine correct type |
| return super.getValueFiller(); |
| } |
| } |
| |
| public static String toString(String name, FunctionValues[] valsArr, int doc) throws IOException { |
| StringBuilder sb = new StringBuilder(); |
| sb.append(name).append('('); |
| boolean firstTime=true; |
| for (FunctionValues vals : valsArr) { |
| if (firstTime) { |
| firstTime=false; |
| } else { |
| sb.append(','); |
| } |
| sb.append(vals.toString(doc)); |
| } |
| sb.append(')'); |
| return sb.toString(); |
| } |
| |
| @Override |
| public void createWeight(Map context, IndexSearcher searcher) throws IOException { |
| for (ValueSource source : sources) |
| source.createWeight(context, searcher); |
| } |
| |
| @Override |
| public int hashCode() { |
| return sources.hashCode() + name().hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this.getClass() != o.getClass()) return false; |
| MultiFunction other = (MultiFunction)o; |
| return this.sources.equals(other.sources); |
| } |
| } |
| |