| /* |
| * 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.queries.function.docvalues.FloatDocValues; |
| import org.apache.lucene.search.IndexSearcher; |
| |
| import java.io.IOException; |
| import java.util.Map; |
| |
| /** |
| * <code>RangeMapFloatFunction</code> implements a map function over |
| * another {@link ValueSource} whose values fall within min and max inclusive to target. |
| * <br> |
| * Normally Used as an argument to a {@link org.apache.lucene.queries.function.FunctionQuery} |
| * |
| * |
| */ |
| public class RangeMapFloatFunction extends ValueSource { |
| protected final ValueSource source; |
| protected final float min; |
| protected final float max; |
| protected final ValueSource target; |
| protected final ValueSource defaultVal; |
| |
| public RangeMapFloatFunction(ValueSource source, float min, float max, float target, Float def) { |
| this(source, min, max, new ConstValueSource(target), def == null ? null : new ConstValueSource(def)); |
| } |
| |
| public RangeMapFloatFunction(ValueSource source, float min, float max, ValueSource target, ValueSource def) { |
| this.source = source; |
| this.min = min; |
| this.max = max; |
| this.target = target; |
| this.defaultVal = def; |
| } |
| |
| @Override |
| public String description() { |
| return "map(" + source.description() + "," + min + "," + max + "," + target.description() + "," + (defaultVal == null ? "null" : defaultVal.description()) + ")"; |
| } |
| |
| @Override |
| public FunctionValues getValues(Map context, LeafReaderContext readerContext) throws IOException { |
| final FunctionValues vals = source.getValues(context, readerContext); |
| final FunctionValues targets = target.getValues(context, readerContext); |
| final FunctionValues defaults = (this.defaultVal == null) ? null : defaultVal.getValues(context, readerContext); |
| return new FloatDocValues(this) { |
| @Override |
| public float floatVal(int doc) throws IOException { |
| float val = vals.floatVal(doc); |
| return (val>=min && val<=max) ? targets.floatVal(doc) : (defaultVal == null ? val : defaults.floatVal(doc)); |
| } |
| @Override |
| public String toString(int doc) throws IOException { |
| return "map(" + vals.toString(doc) + ",min=" + min + ",max=" + max + ",target=" + targets.toString(doc) + ",defaultVal=" + (defaults == null ? "null" : (defaults.toString(doc))) + ")"; |
| } |
| }; |
| } |
| |
| @Override |
| public void createWeight(Map context, IndexSearcher searcher) throws IOException { |
| source.createWeight(context, searcher); |
| } |
| |
| @Override |
| public int hashCode() { |
| int h = source.hashCode(); |
| h ^= (h << 10) | (h >>> 23); |
| h += Float.floatToIntBits(min); |
| h ^= (h << 14) | (h >>> 19); |
| h += Float.floatToIntBits(max); |
| h += target.hashCode(); |
| if (defaultVal != null) |
| h += defaultVal.hashCode(); |
| return h; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (RangeMapFloatFunction.class != o.getClass()) return false; |
| RangeMapFloatFunction other = (RangeMapFloatFunction)o; |
| return this.min == other.min |
| && this.max == other.max |
| && this.target.equals(other.target) |
| && this.source.equals(other.source) |
| && (this.defaultVal == other.defaultVal || (this.defaultVal != null && this.defaultVal.equals(other.defaultVal))); |
| } |
| } |