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114 lines
3.7 KiB
C++
114 lines
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozStorageBindingParams_h
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#define mozStorageBindingParams_h
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#include "nsCOMArray.h"
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#include "nsIVariant.h"
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#include "nsInterfaceHashtable.h"
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#include "mozStorageBindingParamsArray.h"
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#include "mozStorageStatement.h"
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#include "mozStorageAsyncStatement.h"
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#include "Variant.h"
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#include "mozIStorageBindingParams.h"
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#include "IStorageBindingParamsInternal.h"
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namespace mozilla {
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namespace storage {
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class BindingParams : public mozIStorageBindingParams
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, public IStorageBindingParamsInternal
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{
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public:
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_MOZISTORAGEBINDINGPARAMS
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NS_DECL_ISTORAGEBINDINGPARAMSINTERNAL
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/**
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* Locks the parameters and prevents further modification to it (such as
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* binding more elements to it).
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*/
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void lock();
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/**
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* Unlocks the parameters and allows modification to it again.
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*
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* @param aOwningStatement
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* The statement that owns us. We cleared this when we were locked,
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* and our invariant requires us to have this, so you need to tell us
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* again.
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*/
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void unlock(Statement *aOwningStatement);
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/**
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* @returns the pointer to the owning BindingParamsArray. Used by a
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* BindingParamsArray to verify that we belong to it when added.
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*/
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const mozIStorageBindingParamsArray *getOwner() const;
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BindingParams(mozIStorageBindingParamsArray *aOwningArray,
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Statement *aOwningStatement);
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protected:
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virtual ~BindingParams() {}
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explicit BindingParams(mozIStorageBindingParamsArray *aOwningArray);
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// Note that this is managed as a sparse array, so particular caution should
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// be used for out-of-bounds usage.
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nsTArray<RefPtr<Variant_base> > mParameters;
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bool mLocked;
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private:
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/**
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* Track the BindingParamsArray that created us until we are added to it.
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* (Once we are added we are locked and no one needs to look up our owner.)
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* Ref-counted since there is no invariant that guarantees it stays alive
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* otherwise. This keeps mOwningStatement alive for us too since the array
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* also holds a reference.
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*/
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nsCOMPtr<mozIStorageBindingParamsArray> mOwningArray;
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/**
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* Used in the synchronous binding case to map parameter names to indices.
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* Not reference-counted because this is only non-null as long as mOwningArray
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* is non-null and mOwningArray also holds a statement reference.
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*/
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Statement *mOwningStatement;
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uint32_t mParamCount;
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};
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/**
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* Adds late resolution of named parameters so they don't get resolved until we
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* try and bind the parameters on the async thread. We also stop checking
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* parameter indices for being too big since we just just don't know how many
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* there are.
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*
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* We support *either* binding by name or binding by index. Trying to do both
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* results in only binding by name at sqlite3_stmt bind time.
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*/
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class AsyncBindingParams : public BindingParams
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{
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public:
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NS_IMETHOD BindByName(const nsACString & aName,
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nsIVariant *aValue);
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NS_IMETHOD BindByIndex(uint32_t aIndex, nsIVariant *aValue);
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virtual already_AddRefed<mozIStorageError> bind(sqlite3_stmt * aStatement);
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explicit AsyncBindingParams(mozIStorageBindingParamsArray *aOwningArray);
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virtual ~AsyncBindingParams() {}
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private:
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nsInterfaceHashtable<nsCStringHashKey, nsIVariant> mNamedParameters;
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};
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} // namespace storage
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} // namespace mozilla
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#endif // mozStorageBindingParams_h
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