145 lines
3.9 KiB
C#
145 lines
3.9 KiB
C#
//
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// OrderablePartitioner.cs
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//
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// Author:
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// Jérémie "Garuma" Laval <jeremie.laval@gmail.com>
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//
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// Copyright (c) 2009 Jérémie "Garuma" Laval
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#if NET_4_0
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using System;
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using System.Collections.Generic;
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namespace System.Collections.Concurrent
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{
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public abstract class OrderablePartitioner<TSource> : Partitioner<TSource>
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{
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bool keysOrderedInEachPartition;
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bool keysOrderedAcrossPartitions;
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bool keysNormalized;
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protected OrderablePartitioner (bool keysOrderedInEachPartition,
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bool keysOrderedAcrossPartitions,
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bool keysNormalized) : base ()
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{
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this.keysOrderedInEachPartition = keysOrderedInEachPartition;
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this.keysOrderedAcrossPartitions = keysOrderedAcrossPartitions;
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this.keysNormalized = keysNormalized;
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}
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public override IEnumerable<TSource> GetDynamicPartitions ()
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{
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foreach (KeyValuePair<long, TSource> item in GetOrderableDynamicPartitions ())
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yield return item.Value;
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}
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public override IList<IEnumerator<TSource>> GetPartitions (int partitionCount)
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{
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IEnumerator<TSource>[] temp = new IEnumerator<TSource>[partitionCount];
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IList<IEnumerator<KeyValuePair<long, TSource>>> enumerators
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= GetOrderablePartitions (partitionCount);
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for (int i = 0; i < enumerators.Count; i++)
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temp[i] = new ProxyEnumerator (enumerators[i]);
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return temp;
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}
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IEnumerator<TSource> GetProxyEnumerator (IEnumerator<KeyValuePair<long, TSource>> enumerator)
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{
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while (enumerator.MoveNext ())
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yield return enumerator.Current.Value;
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}
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public abstract IList<IEnumerator<KeyValuePair<long, TSource>>> GetOrderablePartitions(int partitionCount);
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public virtual IEnumerable<KeyValuePair<long, TSource>> GetOrderableDynamicPartitions()
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{
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if (!SupportsDynamicPartitions)
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throw new NotSupportedException ();
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return null;
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}
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public bool KeysOrderedInEachPartition {
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get {
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return keysOrderedInEachPartition;
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}
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}
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public bool KeysOrderedAcrossPartitions {
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get {
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return keysOrderedAcrossPartitions;
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}
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}
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public bool KeysNormalized {
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get {
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return keysNormalized;
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}
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}
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class ProxyEnumerator : IEnumerator<TSource>, IDisposable
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{
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IEnumerator<KeyValuePair<long, TSource>> internalEnumerator;
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internal ProxyEnumerator (IEnumerator<KeyValuePair<long, TSource>> enumerator)
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{
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internalEnumerator = enumerator;
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}
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public void Dispose ()
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{
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internalEnumerator.Dispose ();
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}
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public bool MoveNext ()
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{
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if (!internalEnumerator.MoveNext ())
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return false;
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Current = internalEnumerator.Current.Value;
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return true;
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}
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public void Reset ()
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{
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internalEnumerator.Reset ();
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}
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object IEnumerator.Current {
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get {
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return Current;
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}
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}
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public TSource Current {
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get;
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private set;
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}
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}
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}
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}
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#endif
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