/* -*- 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 mozStorageStatement_h

#define mozStorageStatement_h

#include "nsAutoPtr.h"

#include "nsString.h"

#include "nsTArray.h"

#include "mozStorageBindingParamsArray.h"

#include "mozStorageStatementData.h"

#include "mozIStorageStatement.h"

#include "mozIStorageValueArray.h"

#include "StorageBaseStatementInternal.h"

#include "mozilla/Attributes.h"

struct sqlite3_stmt;

namespace mozilla {

namespace storage {

class StatementJSHelper;

class Connection;

class StatementParamsHolder;

class StatementRowHolder;

class Statement final : public mozIStorageStatement

                      , public mozIStorageValueArray

                      , public StorageBaseStatementInternal

{

public:

  NS_DECL_THREADSAFE_ISUPPORTS

  NS_DECL_MOZISTORAGESTATEMENT

  NS_DECL_MOZISTORAGEBASESTATEMENT

  NS_DECL_MOZISTORAGEBINDINGPARAMS

  // NS_DECL_MOZISTORAGEVALUEARRAY (methods in mozIStorageStatement)

  NS_DECL_STORAGEBASESTATEMENTINTERNAL

  Statement();

  /**

   * Initializes the object on aDBConnection by preparing the SQL statement

   * given by aSQLStatement.

   *

   * @param aDBConnection

   *        The Connection object this statement is associated with.

   * @param aNativeConnection

   *        The native Sqlite connection this statement is associated with.

   * @param aSQLStatement

   *        The SQL statement to prepare that this object will represent.

   */

  nsresult initialize(Connection *aDBConnection,

                      sqlite3* aNativeConnection,

                      const nsACString &aSQLStatement);

  /**

   * Obtains the native statement pointer.

   */

  inline sqlite3_stmt *nativeStatement() { return mDBStatement; }

  /**

   * Obtains and transfers ownership of the array of parameters that are bound

   * to this statment.  This can be null.

   */

  inline already_AddRefed<BindingParamsArray> bindingParamsArray()

  {

    return mParamsArray.forget();

  }

private:

    ~Statement();

    sqlite3_stmt *mDBStatement;

    uint32_t mParamCount;

    uint32_t mResultColumnCount;

    nsTArray<nsCString> mColumnNames;

    bool mExecuting;

    /**

     * @return a pointer to the BindingParams object to use with our Bind*

     *         method.

     */

    mozIStorageBindingParams *getParams();

    /**

     * Holds the array of parameters to bind to this statement when we execute

     * it asynchronously.

     */

    RefPtr<BindingParamsArray> mParamsArray;

    /**

     * The following two members are only used with the JS helper.  They cache

     * the row and params objects.

     */

    nsMainThreadPtrHandle<StatementParamsHolder> mStatementParamsHolder;

    nsMainThreadPtrHandle<StatementRowHolder> mStatementRowHolder;

  /**

   * Internal version of finalize that allows us to tell it if it is being

   * called from the destructor so it can know not to dispatch events that

   * require a reference to us.

   *

   * @param aDestructing

   *        Is the destructor calling?

   */

  nsresult internalFinalize(bool aDestructing);

  friend class StatementJSHelper;

};

inline nsISupports*

ToSupports(Statement* p)

{

  return NS_ISUPPORTS_CAST(mozIStorageStatement*, p);

}

} // namespace storage

} // namespace mozilla

#endif // mozStorageStatement_h