| /* |
| * 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.solr.core; |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.queries.function.FunctionValues; |
| import org.apache.lucene.queries.function.ValueSource; |
| import org.apache.lucene.queries.function.docvalues.DoubleDocValues; |
| import org.apache.lucene.queries.function.valuesource.DoubleConstValueSource; |
| import org.apache.solr.search.FunctionQParser; |
| import org.apache.solr.search.SyntaxError; |
| import org.apache.solr.search.ValueSourceParser; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentMap; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| /** |
| * A Mock ValueSource parser that produces ValueSources that returns a constant |
| * value but also keeps track of how many times it was asked for a value for any |
| * document via a static map and a user defined key. |
| **/ |
| public class CountUsageValueSourceParser extends ValueSourceParser { |
| |
| private static final ConcurrentMap<String,AtomicInteger> counters |
| = new ConcurrentHashMap<>(); |
| |
| public static void clearCounters() { |
| counters.clear(); |
| } |
| public static int getAndClearCount(String key) { |
| AtomicInteger counter = counters.remove(key); |
| if (null == counter) { |
| throw new IllegalArgumentException("Key has never been used in function: " + key); |
| } |
| return counter.get(); |
| } |
| |
| @Override |
| public ValueSource parse(FunctionQParser fp) throws SyntaxError { |
| String key = fp.parseArg(); |
| double val = fp.parseDouble(); |
| |
| AtomicInteger counter = new AtomicInteger(); |
| if (null != counters.putIfAbsent(key, counter)) { |
| throw new IllegalArgumentException("Key has already been used: " + key); |
| } |
| return new CountDocsValueSource(counter, val); |
| } |
| |
| static final private class CountDocsValueSource extends DoubleConstValueSource { |
| private final AtomicInteger counter; |
| private final double value; |
| public CountDocsValueSource(AtomicInteger counter, double value) { |
| super(value); |
| this.value = value; |
| this.counter = counter; |
| } |
| @Override |
| public FunctionValues getValues(@SuppressWarnings({"rawtypes"})Map context, |
| LeafReaderContext readerContext) throws IOException { |
| return new DoubleDocValues(this) { |
| @Override |
| public double doubleVal(int doc) { |
| counter.incrementAndGet(); |
| return value; |
| } |
| }; |
| } |
| } |
| |
| } |