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12ab2931a7
MozReview-Commit-ID: AB1VBuhxi8 --HG-- extra : rebase_source : e5062b532370ab4d82fb33a258e447fc66cf09f6
120 lines
4.5 KiB
Plaintext
120 lines
4.5 KiB
Plaintext
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* vim: sw=2 ts=2 sts=2 et
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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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#include "nsISupports.idl"
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#include "mozIStorageBindingParams.idl"
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interface mozIStorageConnection;
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interface mozIStorageStatementCallback;
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interface mozIStoragePendingStatement;
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interface mozIStorageBindingParams;
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interface mozIStorageBindingParamsArray;
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/**
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* The base interface for both pure asynchronous storage statements
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* (mozIStorageAsyncStatement) and 'classic' storage statements
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* (mozIStorageStatement) that can be used for both synchronous and asynchronous
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* purposes.
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*/
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[scriptable, uuid(16ca67aa-1325-43e2-aac7-859afd1590b2)]
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interface mozIStorageBaseStatement : mozIStorageBindingParams {
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/**
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* Finalizes a statement so you can successfully close a database connection.
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* Once a statement has been finalized it can no longer be used for any
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* purpose.
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*
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* Statements are implicitly finalized when their reference counts hits zero.
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* If you are a native (C++) caller this is accomplished by setting all of
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* your nsCOMPtr instances to be NULL. If you are operating from JavaScript
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* code then you cannot rely on this behavior because of the involvement of
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* garbage collection.
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*
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* When finalizing an asynchronous statement you do not need to worry about
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* whether the statement has actually been executed by the asynchronous
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* thread; you just need to call finalize after your last call to executeAsync
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* involving the statement. However, you do need to use asyncClose instead of
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* close on the connection if any statements have been used asynchronously.
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*/
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void finalize();
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/**
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* Binds the array of parameters to the statement. When executeAsync is
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* called, all the parameters in aParameters are bound and then executed.
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*
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* @param aParameters
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* The array of parameters to bind to the statement upon execution.
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*
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* @note This is only works on statements being used asynchronously.
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*/
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void bindParameters(in mozIStorageBindingParamsArray aParameters);
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/**
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* Creates a new mozIStorageBindingParamsArray that can be used to bind
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* multiple sets of data to a statement with bindParameters.
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*
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* @return a mozIStorageBindingParamsArray that multiple sets of parameters
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* can be bound to.
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*
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* @note This is only useful for statements being used asynchronously.
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*/
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mozIStorageBindingParamsArray newBindingParamsArray();
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/**
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* Execute a query asynchronously using any currently bound parameters. This
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* statement can be reused immediately, and reset does not need to be called.
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*
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* @note If you have any custom defined functions, they must be re-entrant
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* since they can be called on multiple threads.
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*
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* @param aCallback [optional]
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* The callback object that will be notified of progress, errors, and
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* completion.
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* @return an object that can be used to cancel the statements execution.
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*/
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mozIStoragePendingStatement executeAsync(
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[optional] in mozIStorageStatementCallback aCallback
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);
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/**
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* The statement is not usable, either because it failed to initialize or
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* was explicitly finalized.
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*/
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const long MOZ_STORAGE_STATEMENT_INVALID = 0;
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/**
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* The statement is usable.
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*/
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const long MOZ_STORAGE_STATEMENT_READY = 1;
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/**
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* Indicates that the statement is executing and the row getters may be used.
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*
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* @note This is only relevant for mozIStorageStatement instances being used
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* in a synchronous fashion.
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*/
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const long MOZ_STORAGE_STATEMENT_EXECUTING = 2;
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/**
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* Find out whether the statement is usable (has not been finalized).
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*/
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readonly attribute long state;
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/**
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* Escape a string for SQL LIKE search.
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*
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* @note Consumers will have to use same escape char when doing statements
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* such as: ...LIKE '?1' ESCAPE '/'...
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*
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* @param aValue
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* The string to escape for SQL LIKE.
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* @param aEscapeChar
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* The escape character.
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* @return an AString of an escaped version of aValue
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* (%, _ and the escape char are escaped with the escape char)
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* For example, we will convert "foo/bar_baz%20cheese"
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* into "foo//bar/_baz/%20cheese" (if the escape char is '/').
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*/
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AString escapeStringForLIKE(in AString aValue, in wchar aEscapeChar);
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};
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