Made the Dispose() method of the parenting collection public (for now only?); found another, better, priority queue implementation to use for reference

git-svn-id: file:///srv/devel/repo-conversion/nusu@3 d2e56fa2-650e-0410-a79f-9358c0239efd

Source/Collections/ParentingCollection.cs

@@ -95,7 +95,7 @@ namespace Nuclex.Support.Collections {
     }
 
     /// <summary>Release all resources owned by the instance explicitely</summary>
-    void IDisposable.Dispose() {
+    public void Dispose() {
       Dispose(true); // Called by user
     }
 

Source/Collections/PriorityQueue.cs

@@ -3,6 +3,164 @@ using System.Collections.Generic;
 using System.Collections;
 
 namespace Nuclex.Support.Collections {
+  /*
+  public class PriorityQueue : ICollection {
+
+    private struct HeapEntry {
+
+      public HeapEntry(object item, int priority) {
+        this.item = item;
+        this.priority = priority;
+      }
+      public object Item {
+        get { return item; }
+      }
+      public int Priority {
+        get { return priority; }
+      }
+
+      private object item;
+      private int priority;
+
+    }
+
+    private int count;
+    private int capacity;
+    private int version;
+    private HeapEntry[] heap;
+
+    public PriorityQueue() {
+      capacity = 15; // 15 is equal to 4 complete levels
+      heap = new HeapEntry[capacity];
+    }
+
+    public object Dequeue() {
+      if(count == 0)
+        throw new InvalidOperationException();
+
+      object result = heap[0].Item;
+      count--;
+      trickleDown(0, heap[count]);
+      version++;
+      return result;
+    }
+
+    public void Enqueue(object item, int priority) {
+      if(count == capacity)
+        growHeap();
+      count++;
+      bubbleUp(count - 1, new HeapEntry(item, priority));
+      version++;
+    }
+
+    private void bubbleUp(int index, HeapEntry he) {
+      int parent = getParent(index);
+      // note: (index > 0) means there is a parent
+      while((index > 0) && (heap[parent].Priority < he.Priority)) {
+        heap[index] = heap[parent];
+        index = parent;
+        parent = getParent(index);
+      }
+      heap[index] = he;
+    }
+
+    private int getLeftChild(int index) {
+      return (index * 2) + 1;
+    }
+
+    private int getParent(int index) {
+      return (index - 1) / 2;
+    }
+
+    private void growHeap() {
+      capacity = (capacity * 2) + 1;
+      HeapEntry[] newHeap = new HeapEntry[capacity];
+      System.Array.Copy(heap, 0, newHeap, 0, count);
+      heap = newHeap;
+    }
+
+    private void trickleDown(int index, HeapEntry he) {
+      int child = getLeftChild(index);
+      while(child < count) {
+        if(((child + 1) < count) &&
+            (heap[child].Priority < heap[child + 1].Priority)) {
+          child++;
+        }
+        heap[index] = heap[child];
+        index = child;
+        child = getLeftChild(index);
+      }
+      bubbleUp(index, he);
+    }
+
+    #region IEnumerable implementation
+    public IEnumerator GetEnumerator() {
+      return new PriorityQueueEnumerator(this);
+    }
+    #endregion
+
+    #region ICollection implementation
+    public int Count {
+      get { return count; }
+    }
+
+    public void CopyTo(Array array, int index) {
+      System.Array.Copy(heap, 0, array, index, count);
+    }
+
+    public object SyncRoot {
+      get { return this; }
+    }
+
+    public bool IsSynchronized {
+      get { return false; }
+    }
+    #endregion
+
+    #region Priority Queue enumerator
+    private class PriorityQueueEnumerator : IEnumerator {
+      private int index;
+      private PriorityQueue pq;
+      private int version;
+
+      public PriorityQueueEnumerator(PriorityQueue pq) {
+        this.pq = pq;
+        Reset();
+      }
+
+      private void checkVersion() {
+        if(version != pq.version)
+          throw new InvalidOperationException();
+      }
+
+      #region IEnumerator Members
+
+      public void Reset() {
+        index = -1;
+        version = pq.version;
+      }
+
+      public object Current {
+        get {
+          checkVersion();
+          return pq.heap[index].Item;
+        }
+      }
+
+      public bool MoveNext() {
+        checkVersion();
+        if(index + 1 == pq.count)
+          return false;
+        index++;
+        return true;
+      }
+
+      #endregion
+    }
+    #endregion
+
+  }
+  */
   /*
     /// <summary>Queue that dequeues items in order of their priority</summary>
     public class PriorityQueue<ItemType> : ICollection, IEnumerable<ItemType> {

Source/Serialization/BinarySerializer.cs

@@ -59,7 +59,7 @@ namespace Nuclex.Support.Serialization {
         );
 
         // Let the blueprint load its own data and add it to the collection
-        ((IBinarySerializable)item).Load(reader);
+        (item as IBinarySerializable).Load(reader);
         collection.Add(item);
 
       } // for