gecko/storage/public/mozIStorageValueArray.idl
2012-05-21 12:12:37 +01:00

162 lines
4.8 KiB
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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/. */
#include "nsISupports.idl"
[ptr] native octetPtr(PRUint8);
/**
* mozIStorageValueArray wraps an array of SQL values, such as a single database
* row.
*/
[scriptable, uuid(07b5b93e-113c-4150-863c-d247b003a55d)]
interface mozIStorageValueArray : nsISupports {
/**
* These type values are returned by getTypeOfIndex
* to indicate what type of value is present at
* a given column.
*/
const long VALUE_TYPE_NULL = 0;
const long VALUE_TYPE_INTEGER = 1;
const long VALUE_TYPE_FLOAT = 2;
const long VALUE_TYPE_TEXT = 3;
const long VALUE_TYPE_BLOB = 4;
/**
* numEntries
*
* number of entries in the array (each corresponding to a column
* in the database row)
*/
readonly attribute unsigned long numEntries;
/**
* Returns the type of the value at the given column index;
* one of VALUE_TYPE_NULL, VALUE_TYPE_INTEGER, VALUE_TYPE_FLOAT,
* VALUE_TYPE_TEXT, VALUE_TYPE_BLOB.
*/
long getTypeOfIndex(in unsigned long aIndex);
/**
* Obtain a value for the given entry (column) index.
* Due to SQLite's type conversion rules, any of these are valid
* for any column regardless of the column's data type. However,
* if the specific type matters, getTypeOfIndex should be used
* first to identify the column type, and then the appropriate
* get method should be called.
*
* If you ask for a string value for a NULL column, you will get an empty
* string with IsVoid set to distinguish it from an explicitly set empty
* string.
*/
long getInt32(in unsigned long aIndex);
long long getInt64(in unsigned long aIndex);
double getDouble(in unsigned long aIndex);
AUTF8String getUTF8String(in unsigned long aIndex);
AString getString(in unsigned long aIndex);
// data will be NULL if dataSize = 0
void getBlob(in unsigned long aIndex, out unsigned long aDataSize, [array,size_is(aDataSize)] out octet aData);
boolean getIsNull(in unsigned long aIndex);
/**
* Returns a shared string pointer
*/
[noscript] void getSharedUTF8String(in unsigned long aIndex, out unsigned long aLength, [shared,retval] out string aResult);
[noscript] void getSharedString(in unsigned long aIndex, out unsigned long aLength, [shared,retval] out wstring aResult);
[noscript] void getSharedBlob(in unsigned long aIndex, out unsigned long aLength, [shared,retval] out octetPtr aResult);
%{C++
/**
* Getters for native code that return their values as
* the return type, for convenience and sanity.
*
* Not virtual; no vtable bloat.
*/
inline PRInt32 AsInt32(PRUint32 idx) {
PRInt32 v = 0;
#ifdef DEBUG
nsresult rv =
#endif
GetInt32(idx, &v);
NS_ABORT_IF_FALSE(NS_SUCCEEDED(rv) || IsNull(idx),
"Getting value failed, wrong column index?");
return v;
}
inline PRInt64 AsInt64(PRUint32 idx) {
PRInt64 v = 0;
#ifdef DEBUG
nsresult rv =
#endif
GetInt64(idx, &v);
NS_ABORT_IF_FALSE(NS_SUCCEEDED(rv) || IsNull(idx),
"Getting value failed, wrong column index?");
return v;
}
inline double AsDouble(PRUint32 idx) {
double v = 0.0;
#ifdef DEBUG
nsresult rv =
#endif
GetDouble(idx, &v);
NS_ABORT_IF_FALSE(NS_SUCCEEDED(rv) || IsNull(idx),
"Getting value failed, wrong column index?");
return v;
}
inline const char* AsSharedUTF8String(PRUint32 idx, PRUint32 *len) {
const char *str = nsnull;
*len = 0;
#ifdef DEBUG
nsresult rv =
#endif
GetSharedUTF8String(idx, len, &str);
NS_ABORT_IF_FALSE(NS_SUCCEEDED(rv) || IsNull(idx),
"Getting value failed, wrong column index?");
return str;
}
inline const PRUnichar* AsSharedWString(PRUint32 idx, PRUint32 *len) {
const PRUnichar *str = nsnull;
*len = 0;
#ifdef DEBUG
nsresult rv =
#endif
GetSharedString(idx, len, &str);
NS_ABORT_IF_FALSE(NS_SUCCEEDED(rv) || IsNull(idx),
"Getting value failed, wrong column index?");
return str;
}
inline const PRUint8* AsSharedBlob(PRUint32 idx, PRUint32 *len) {
const PRUint8 *blob = nsnull;
*len = 0;
#ifdef DEBUG
nsresult rv =
#endif
GetSharedBlob(idx, len, &blob);
NS_ABORT_IF_FALSE(NS_SUCCEEDED(rv) || IsNull(idx),
"Getting value failed, wrong column index?");
return blob;
}
inline bool IsNull(PRUint32 idx) {
bool b = PR_FALSE;
#ifdef DEBUG
nsresult rv =
#endif
GetIsNull(idx, &b);
NS_ABORT_IF_FALSE(NS_SUCCEEDED(rv),
"Getting value failed, wrong column index?");
return b;
}
%}
};