| /* |
| * 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; |
| |
| |
| /** |
| * Converts individual ValueSource instances to leverage the FunctionValues *Val functions that work with multiple values, |
| * i.e. {@link org.apache.lucene.queries.function.FunctionValues#doubleVal(int, double[])} |
| */ |
| //Not crazy about the name, but... |
| public class VectorValueSource extends MultiValueSource { |
| protected final List<ValueSource> sources; |
| |
| |
| public VectorValueSource(List<ValueSource> sources) { |
| this.sources = sources; |
| } |
| |
| public List<ValueSource> getSources() { |
| return sources; |
| } |
| |
| @Override |
| public int dimension() { |
| return sources.size(); |
| } |
| |
| public String name() { |
| return "vector"; |
| } |
| |
| @Override |
| public FunctionValues getValues(Map context, LeafReaderContext readerContext) throws IOException { |
| int size = sources.size(); |
| |
| // special-case x,y and lat,lon since it's so common |
| if (size==2) { |
| final FunctionValues x = sources.get(0).getValues(context, readerContext); |
| final FunctionValues y = sources.get(1).getValues(context, readerContext); |
| return new FunctionValues() { |
| @Override |
| public void byteVal(int doc, byte[] vals) throws IOException { |
| vals[0] = x.byteVal(doc); |
| vals[1] = y.byteVal(doc); |
| } |
| @Override |
| public void shortVal(int doc, short[] vals) throws IOException { |
| vals[0] = x.shortVal(doc); |
| vals[1] = y.shortVal(doc); |
| } |
| @Override |
| public void intVal(int doc, int[] vals) throws IOException { |
| vals[0] = x.intVal(doc); |
| vals[1] = y.intVal(doc); |
| } |
| @Override |
| public void longVal(int doc, long[] vals) throws IOException { |
| vals[0] = x.longVal(doc); |
| vals[1] = y.longVal(doc); |
| } |
| @Override |
| public void floatVal(int doc, float[] vals) throws IOException { |
| vals[0] = x.floatVal(doc); |
| vals[1] = y.floatVal(doc); |
| } |
| @Override |
| public void doubleVal(int doc, double[] vals) throws IOException { |
| vals[0] = x.doubleVal(doc); |
| vals[1] = y.doubleVal(doc); |
| } |
| @Override |
| public void strVal(int doc, String[] vals) throws IOException { |
| vals[0] = x.strVal(doc); |
| vals[1] = y.strVal(doc); |
| } |
| @Override |
| public String toString(int doc) throws IOException { |
| return name() + "(" + x.toString(doc) + "," + y.toString(doc) + ")"; |
| } |
| }; |
| } |
| |
| |
| final FunctionValues[] valsArr = new FunctionValues[size]; |
| for (int i = 0; i < size; i++) { |
| valsArr[i] = sources.get(i).getValues(context, readerContext); |
| } |
| |
| return new FunctionValues() { |
| @Override |
| public void byteVal(int doc, byte[] vals) throws IOException { |
| for (int i = 0; i < valsArr.length; i++) { |
| vals[i] = valsArr[i].byteVal(doc); |
| } |
| } |
| |
| @Override |
| public void shortVal(int doc, short[] vals) throws IOException { |
| for (int i = 0; i < valsArr.length; i++) { |
| vals[i] = valsArr[i].shortVal(doc); |
| } |
| } |
| |
| @Override |
| public void floatVal(int doc, float[] vals) throws IOException { |
| for (int i = 0; i < valsArr.length; i++) { |
| vals[i] = valsArr[i].floatVal(doc); |
| } |
| } |
| |
| @Override |
| public void intVal(int doc, int[] vals) throws IOException { |
| for (int i = 0; i < valsArr.length; i++) { |
| vals[i] = valsArr[i].intVal(doc); |
| } |
| } |
| |
| @Override |
| public void longVal(int doc, long[] vals) throws IOException { |
| for (int i = 0; i < valsArr.length; i++) { |
| vals[i] = valsArr[i].longVal(doc); |
| } |
| } |
| |
| @Override |
| public void doubleVal(int doc, double[] vals) throws IOException { |
| for (int i = 0; i < valsArr.length; i++) { |
| vals[i] = valsArr[i].doubleVal(doc); |
| } |
| } |
| |
| @Override |
| public void strVal(int doc, String[] vals) throws IOException { |
| for (int i = 0; i < valsArr.length; i++) { |
| vals[i] = valsArr[i].strVal(doc); |
| } |
| } |
| |
| @Override |
| public String toString(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 String description() { |
| 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(); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) return true; |
| if (!(o instanceof VectorValueSource)) return false; |
| |
| VectorValueSource that = (VectorValueSource) o; |
| |
| return sources.equals(that.sources); |
| |
| } |
| |
| @Override |
| public int hashCode() { |
| return sources.hashCode(); |
| } |
| } |