import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

storage/mozStorageBindingParamsArray.h

@@ -0,0 +1,116 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozStorageBindingParamsArray_h
+#define mozStorageBindingParamsArray_h
+
+#include "nsAutoPtr.h"
+#include "nsTArray.h"
+#include "mozilla/Attributes.h"
+
+#include "mozIStorageBindingParamsArray.h"
+
+namespace mozilla {
+namespace storage {
+
+class StorageBaseStatementInternal;
+
+class BindingParamsArray final : public mozIStorageBindingParamsArray
+{
+  typedef nsTArray< nsCOMPtr<mozIStorageBindingParams> > array_type;
+
+  ~BindingParamsArray() {}
+
+public:
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_MOZISTORAGEBINDINGPARAMSARRAY
+
+  explicit BindingParamsArray(StorageBaseStatementInternal *aOwningStatement);
+
+  typedef array_type::size_type size_type;
+
+  /**
+   * Locks the array and prevents further modification to it (such as adding
+   * more elements to it).
+   */
+  void lock();
+
+  /**
+   * @return the pointer to the owning BindingParamsArray.
+   */
+  const StorageBaseStatementInternal *getOwner() const;
+
+  /**
+   * @return the number of elemets the array contains.
+   */
+  size_type length() const { return mArray.Length(); }
+
+  class iterator {
+  public:
+    iterator(BindingParamsArray *aArray,
+             uint32_t aIndex)
+    : mArray(aArray)
+    , mIndex(aIndex)
+    {
+    }
+
+    iterator &operator++(int)
+    {
+      mIndex++;
+      return *this;
+    }
+
+    bool operator==(const iterator &aOther) const
+    {
+      return mIndex == aOther.mIndex;
+    }
+    bool operator!=(const iterator &aOther) const
+    {
+      return !(*this == aOther);
+    }
+    mozIStorageBindingParams *operator*()
+    {
+      NS_ASSERTION(mIndex < mArray->length(),
+                   "Dereferenceing an invalid value!");
+      return mArray->mArray[mIndex].get();
+    }
+  private:
+    void operator--() { }
+    BindingParamsArray *mArray;
+    uint32_t mIndex;
+  };
+
+  /**
+   * Obtains an iterator pointing to the beginning of the array.
+   */
+  inline iterator begin()
+  {
+    NS_ASSERTION(length() != 0,
+                 "Obtaining an iterator to the beginning with no elements!");
+    return iterator(this, 0);
+  }
+
+  /**
+   * Obtains an iterator pointing to the end of the array.
+   */
+  inline iterator end()
+  {
+    NS_ASSERTION(mLocked,
+                 "Obtaining an iterator to the end when we are not locked!");
+    return iterator(this, length());
+  }
+private:
+  nsCOMPtr<StorageBaseStatementInternal> mOwningStatement;
+  array_type mArray;
+  bool mLocked;
+
+  friend class iterator;
+};
+
+} // namespace storage
+} // namespace mozilla
+
+#endif // mozStorageBindingParamsArray_h