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comparison: storage/public/mozIStorageBaseStatement.idl

storage/public/mozIStorageBaseStatement.idl

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TOR_BUG_9701
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1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 * vim: sw=2 ts=2 sts=2 et
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6
7 #include "nsISupports.idl"
8 #include "mozIStorageBindingParams.idl"
9
10 interface mozIStorageConnection;
11 interface mozIStorageStatementCallback;
12 interface mozIStoragePendingStatement;
13 interface mozIStorageBindingParams;
14 interface mozIStorageBindingParamsArray;
15
16 /**
17 * The base interface for both pure asynchronous storage statements
18 * (mozIStorageAsyncStatement) and 'classic' storage statements
19 * (mozIStorageStatement) that can be used for both synchronous and asynchronous
20 * purposes.
21 */
22 [scriptable, uuid(5d34f333-ed3f-4aa2-ba51-f2a8b0cfa33a)]
23 interface mozIStorageBaseStatement : mozIStorageBindingParams {
24 /**
25 * Finalizes a statement so you can successfully close a database connection.
26 * Once a statement has been finalized it can no longer be used for any
27 * purpose.
28 *
29 * Statements are implicitly finalized when their reference counts hits zero.
30 * If you are a native (C++) caller this is accomplished by setting all of
31 * your nsCOMPtr instances to be NULL. If you are operating from JavaScript
32 * code then you cannot rely on this behavior because of the involvement of
33 * garbage collection.
34 *
35 * When finalizing an asynchronous statement you do not need to worry about
36 * whether the statement has actually been executed by the asynchronous
37 * thread; you just need to call finalize after your last call to executeAsync
38 * involving the statement. However, you do need to use asyncClose instead of
39 * close on the connection if any statements have been used asynchronously.
40 */
41 void finalize();
42
43 /**
44 * Bind the given value at the given numeric index.
45 *
46 * @param aParamIndex
47 * 0-based index, 0 corresponding to the first numbered argument or
48 * "?1".
49 * @param aValue
50 * Argument value.
51 * @param aValueSize
52 * Length of aValue in bytes.
53 * @{
54 */
55 [deprecated] void bindUTF8StringParameter(in unsigned long aParamIndex,
56 in AUTF8String aValue);
57 [deprecated] void bindStringParameter(in unsigned long aParamIndex,
58 in AString aValue);
59 [deprecated] void bindDoubleParameter(in unsigned long aParamIndex,
60 in double aValue);
61 [deprecated] void bindInt32Parameter(in unsigned long aParamIndex,
62 in long aValue);
63 [deprecated] void bindInt64Parameter(in unsigned long aParamIndex,
64 in long long aValue);
65 [deprecated] void bindNullParameter(in unsigned long aParamIndex);
66 [deprecated] void bindBlobParameter(
67 in unsigned long aParamIndex,
68 [array,const,size_is(aValueSize)] in octet aValue,
69 in unsigned long aValueSize);
70 [deprecated] void bindAdoptedBlobParameter(
71 in unsigned long aParamIndex,
72 [array,size_is(aValueSize)] in octet aValue,
73 in unsigned long aValueSize);
74 /**@}*/
75
76 /**
77 * Binds the array of parameters to the statement. When executeAsync is
78 * called, all the parameters in aParameters are bound and then executed.
79 *
80 * @param aParameters
81 * The array of parameters to bind to the statement upon execution.
82 *
83 * @note This is only works on statements being used asynchronously.
84 */
85 void bindParameters(in mozIStorageBindingParamsArray aParameters);
86
87 /**
88 * Creates a new mozIStorageBindingParamsArray that can be used to bind
89 * multiple sets of data to a statement with bindParameters.
90 *
91 * @return a mozIStorageBindingParamsArray that multiple sets of parameters
92 * can be bound to.
93 *
94 * @note This is only useful for statements being used asynchronously.
95 */
96 mozIStorageBindingParamsArray newBindingParamsArray();
97
98 /**
99 * Execute a query asynchronously using any currently bound parameters. This
100 * statement can be reused immediately, and reset does not need to be called.
101 *
102 * @note If you have any custom defined functions, they must be re-entrant
103 * since they can be called on multiple threads.
104 *
105 * @param aCallback [optional]
106 * The callback object that will be notified of progress, errors, and
107 * completion.
108 * @return an object that can be used to cancel the statements execution.
109 */
110 mozIStoragePendingStatement executeAsync(
111 [optional] in mozIStorageStatementCallback aCallback
112 );
113
114 /**
115 * The statement is not usable, either because it failed to initialize or
116 * was explicitly finalized.
117 */
118 const long MOZ_STORAGE_STATEMENT_INVALID = 0;
119 /**
120 * The statement is usable.
121 */
122 const long MOZ_STORAGE_STATEMENT_READY = 1;
123 /**
124 * Indicates that the statement is executing and the row getters may be used.
125 *
126 * @note This is only relevant for mozIStorageStatement instances being used
127 * in a synchronous fashion.
128 */
129 const long MOZ_STORAGE_STATEMENT_EXECUTING = 2;
130
131 /**
132 * Find out whether the statement is usable (has not been finalized).
133 */
134 readonly attribute long state;
135
136 /**
137 * Escape a string for SQL LIKE search.
138 *
139 * @note Consumers will have to use same escape char when doing statements
140 * such as: ...LIKE '?1' ESCAPE '/'...
141 *
142 * @param aValue
143 * The string to escape for SQL LIKE.
144 * @param aEscapeChar
145 * The escape character.
146 * @return an AString of an escaped version of aValue
147 * (%, _ and the escape char are escaped with the escape char)
148 * For example, we will convert "foo/bar_baz%20cheese"
149 * into "foo//bar/_baz/%20cheese" (if the escape char is '/').
150 */
151 AString escapeStringForLIKE(in AString aValue, in wchar aEscapeChar);
152 };

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