| /* |
| * 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 org.apache.lucene.util.BytesRefBuilder; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| |
| /** |
| * Depending on the boolean value of the <code>ifSource</code> function, |
| * returns the value of the <code>trueSource</code> or <code>falseSource</code> function. |
| */ |
| public class IfFunction extends BoolFunction { |
| private final ValueSource ifSource; |
| private final ValueSource trueSource; |
| private final ValueSource falseSource; |
| |
| |
| public IfFunction(ValueSource ifSource, ValueSource trueSource, ValueSource falseSource) { |
| this.ifSource = ifSource; |
| this.trueSource = trueSource; |
| this.falseSource = falseSource; |
| } |
| |
| @Override |
| public FunctionValues getValues(Map context, LeafReaderContext readerContext) throws IOException { |
| final FunctionValues ifVals = ifSource.getValues(context, readerContext); |
| final FunctionValues trueVals = trueSource.getValues(context, readerContext); |
| final FunctionValues falseVals = falseSource.getValues(context, readerContext); |
| |
| return new FunctionValues() { |
| @Override |
| public byte byteVal(int doc) throws IOException { |
| return ifVals.boolVal(doc) ? trueVals.byteVal(doc) : falseVals.byteVal(doc); |
| } |
| |
| @Override |
| public short shortVal(int doc) throws IOException { |
| return ifVals.boolVal(doc) ? trueVals.shortVal(doc) : falseVals.shortVal(doc); |
| } |
| |
| @Override |
| public float floatVal(int doc) throws IOException { |
| return ifVals.boolVal(doc) ? trueVals.floatVal(doc) : falseVals.floatVal(doc); |
| } |
| |
| @Override |
| public int intVal(int doc) throws IOException { |
| return ifVals.boolVal(doc) ? trueVals.intVal(doc) : falseVals.intVal(doc); |
| } |
| |
| @Override |
| public long longVal(int doc) throws IOException { |
| return ifVals.boolVal(doc) ? trueVals.longVal(doc) : falseVals.longVal(doc); |
| } |
| |
| @Override |
| public double doubleVal(int doc) throws IOException { |
| return ifVals.boolVal(doc) ? trueVals.doubleVal(doc) : falseVals.doubleVal(doc); |
| } |
| |
| @Override |
| public String strVal(int doc) throws IOException { |
| return ifVals.boolVal(doc) ? trueVals.strVal(doc) : falseVals.strVal(doc); |
| } |
| |
| @Override |
| public boolean boolVal(int doc) throws IOException { |
| return ifVals.boolVal(doc) ? trueVals.boolVal(doc) : falseVals.boolVal(doc); |
| } |
| |
| @Override |
| public boolean bytesVal(int doc, BytesRefBuilder target) throws IOException { |
| return ifVals.boolVal(doc) ? trueVals.bytesVal(doc, target) : falseVals.bytesVal(doc, target); |
| } |
| |
| @Override |
| public Object objectVal(int doc) throws IOException { |
| return ifVals.boolVal(doc) ? trueVals.objectVal(doc) : falseVals.objectVal(doc); |
| } |
| |
| @Override |
| public boolean exists(int doc) throws IOException { |
| return ifVals.boolVal(doc) ? trueVals.exists(doc) : falseVals.exists(doc); |
| } |
| |
| @Override |
| public ValueFiller getValueFiller() { |
| // TODO: we need types of trueSource / falseSource to handle this |
| // for now, use float. |
| return super.getValueFiller(); |
| } |
| |
| @Override |
| public String toString(int doc) throws IOException { |
| return "if(" + ifVals.toString(doc) + ',' + trueVals.toString(doc) + ',' + falseVals.toString(doc) + ')'; |
| } |
| }; |
| |
| } |
| |
| @Override |
| public String description() { |
| return "if(" + ifSource.description() + ',' + trueSource.description() + ',' + falseSource + ')'; |
| } |
| |
| @Override |
| public int hashCode() { |
| int h = ifSource.hashCode(); |
| h = h * 31 + trueSource.hashCode(); |
| h = h * 31 + falseSource.hashCode(); |
| return h; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (!(o instanceof IfFunction)) return false; |
| IfFunction other = (IfFunction)o; |
| return ifSource.equals(other.ifSource) |
| && trueSource.equals(other.trueSource) |
| && falseSource.equals(other.falseSource); |
| } |
| |
| @Override |
| public void createWeight(Map context, IndexSearcher searcher) throws IOException { |
| ifSource.createWeight(context, searcher); |
| trueSource.createWeight(context, searcher); |
| falseSource.createWeight(context, searcher); |
| } |
| } |