| using J2N.Text; |
| using System; |
| |
| namespace Lucene.Net.Util.Mutable |
| { |
| /* |
| * 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> |
| /// Base class for all mutable values. |
| /// <para/> |
| /// @lucene.internal |
| /// </summary> |
| public abstract class MutableValue : IComparable<MutableValue>, IComparable |
| { |
| protected MutableValue() |
| { |
| Exists = true; |
| } |
| |
| public bool Exists { get; set; } |
| |
| public abstract void Copy(MutableValue source); |
| |
| public abstract MutableValue Duplicate(); |
| |
| public abstract bool EqualsSameType(object other); |
| |
| public abstract int CompareSameType(object other); |
| |
| public abstract object ToObject(); |
| |
| public virtual int CompareTo(MutableValue other) |
| { |
| Type c1 = this.GetType(); |
| Type c2 = other.GetType(); |
| if (c1 != c2) |
| { |
| int c = c1.GetHashCode() - c2.GetHashCode(); |
| if (c == 0) |
| { |
| c = c1.FullName.CompareToOrdinal(c2.FullName); |
| } |
| return c; |
| } |
| return CompareSameType(other); |
| } |
| |
| |
| // LUCENENET specific implementation, for use with FunctionFirstPassGroupingCollector |
| // (note that IComparable<T> does not inherit IComparable, so we need to explicitly |
| // implement here in order to support IComparable) |
| public virtual int CompareTo(object other) |
| { |
| Type c1 = this.GetType(); |
| Type c2 = other.GetType(); |
| if (c1 != c2) |
| { |
| int c = c1.GetHashCode() - c2.GetHashCode(); |
| if (c == 0) |
| { |
| c = c1.FullName.CompareToOrdinal(c2.FullName); |
| } |
| return c; |
| } |
| return CompareSameType(other); |
| } |
| |
| public override bool Equals(object other) |
| { |
| return (this.GetType() == other.GetType()) && this.EqualsSameType(other); |
| } |
| |
| public override abstract int GetHashCode(); |
| |
| public override string ToString() |
| { |
| return Exists ? ToObject().ToString() : "(null)"; |
| } |
| } |
| } |