| using Lucene.Net.Index; |
| using Lucene.Net.Queries.Function.DocValues; |
| using Lucene.Net.Search; |
| using System.Collections; |
| |
| namespace Lucene.Net.Queries.Function.ValueSources |
| { |
| /* |
| * 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. |
| */ |
| |
| /// <summary> |
| /// <see cref="RangeMapSingleFunction"/> implements a map function over |
| /// another <see cref="ValueSource"/> whose values fall within <c>min</c> and <c>max</c> inclusive to <c>target</c>. |
| /// <para/> |
| /// Normally used as an argument to a <see cref="FunctionQuery"/> |
| /// <para/> |
| /// NOTE: This was RangeMapFloatFunction in Lucene |
| /// </summary> |
| public class RangeMapSingleFunction : ValueSource |
| { |
| protected readonly ValueSource m_source; |
| protected readonly float m_min; |
| protected readonly float m_max; |
| protected readonly ValueSource m_target; |
| protected readonly ValueSource m_defaultVal; |
| |
| public RangeMapSingleFunction(ValueSource source, float min, float max, float target, float? def) |
| : this(source, min, max, new ConstValueSource(target), def == null ? null : new ConstValueSource(def.Value)) |
| { |
| } |
| |
| public RangeMapSingleFunction(ValueSource source, float min, float max, ValueSource target, ValueSource def) |
| { |
| this.m_source = source; |
| this.m_min = min; |
| this.m_max = max; |
| this.m_target = target; |
| this.m_defaultVal = def; |
| } |
| |
| public override string GetDescription() |
| { |
| return "map(" + m_source.GetDescription() + "," + m_min + "," + m_max + "," + m_target.GetDescription() + ")"; |
| } |
| |
| public override FunctionValues GetValues(IDictionary context, AtomicReaderContext readerContext) |
| { |
| FunctionValues vals = m_source.GetValues(context, readerContext); |
| FunctionValues targets = m_target.GetValues(context, readerContext); |
| FunctionValues defaults = (this.m_defaultVal == null) ? null : m_defaultVal.GetValues(context, readerContext); |
| return new SingleDocValuesAnonymousInnerClassHelper(this, this, vals, targets, defaults); |
| } |
| |
| private class SingleDocValuesAnonymousInnerClassHelper : SingleDocValues |
| { |
| private readonly RangeMapSingleFunction outerInstance; |
| |
| private readonly FunctionValues vals; |
| private readonly FunctionValues targets; |
| private readonly FunctionValues defaults; |
| |
| public SingleDocValuesAnonymousInnerClassHelper(RangeMapSingleFunction outerInstance, RangeMapSingleFunction @this, FunctionValues vals, FunctionValues targets, FunctionValues defaults) |
| : base(@this) |
| { |
| this.outerInstance = outerInstance; |
| this.vals = vals; |
| this.targets = targets; |
| this.defaults = defaults; |
| } |
| |
| /// <summary> |
| /// NOTE: This was floatVal() in Lucene |
| /// </summary> |
| public override float SingleVal(int doc) |
| { |
| float val = vals.SingleVal(doc); |
| return (val >= outerInstance.m_min && val <= outerInstance.m_max) ? targets.SingleVal(doc) : (outerInstance.m_defaultVal == null ? val : defaults.SingleVal(doc)); |
| } |
| public override string ToString(int doc) |
| { |
| return "map(" + vals.ToString(doc) + ",min=" + outerInstance.m_min + ",max=" + outerInstance.m_max + ",target=" + targets.ToString(doc) + ")"; |
| } |
| } |
| |
| public override void CreateWeight(IDictionary context, IndexSearcher searcher) |
| { |
| m_source.CreateWeight(context, searcher); |
| } |
| |
| public override int GetHashCode() |
| { |
| int h = m_source.GetHashCode(); |
| h ^= (h << 10) | ((int)((uint)h >> 23)); |
| h += J2N.BitConversion.SingleToInt32Bits(m_min); |
| h ^= (h << 14) | ((int)((uint)h >> 19)); |
| h += J2N.BitConversion.SingleToInt32Bits(m_max); |
| h += m_target.GetHashCode(); |
| if (m_defaultVal != null) |
| { |
| h += m_defaultVal.GetHashCode(); |
| } |
| return h; |
| } |
| |
| public override bool Equals(object o) |
| { |
| if (!(o is RangeMapSingleFunction other)) |
| return false; |
| return this.m_min == other.m_min |
| && this.m_max == other.m_max |
| && this.m_target.Equals(other.m_target) |
| && this.m_source.Equals(other.m_source) |
| && (this.m_defaultVal == other.m_defaultVal || (this.m_defaultVal != null && this.m_defaultVal.Equals(other.m_defaultVal))); |
| } |
| } |
| } |