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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: sw=2 ts=2 sts=2 expandtab
* 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 "mozIStorageBaseStatement.idl"
%{C++
#include "mozilla/DebugOnly.h"
%}
[ptr] native octetPtr(uint8_t);
/**
* A SQL statement that can be used for both synchronous and asynchronous
* purposes.
*/
[scriptable, builtinclass, uuid(5f567c35-6c32-4140-828c-683ea49cfd3a)]
interface mozIStorageStatement : mozIStorageBaseStatement {
/**
* Create a clone of this statement, by initializing a new statement
* with the same connection and same SQL statement as this one. It
* does not preserve statement state; that is, if a statement is
* being executed when it is cloned, the new statement will not be
* executing.
*/
mozIStorageStatement clone();
/*
* Number of parameters
*/
readonly attribute unsigned long parameterCount;
/**
* Name of nth parameter, if given
*/
AUTF8String getParameterName(in unsigned long aParamIndex);
/**
* Returns the index of the named parameter.
*
* @param aName
* The name of the parameter you want the index for. This does not
* include the leading ':'.
* @return the index of the named parameter.
*/
unsigned long getParameterIndex(in AUTF8String aName);
/**
* Number of columns returned
*/
readonly attribute unsigned long columnCount;
/**
* Name of nth column
*/
AUTF8String getColumnName(in unsigned long aColumnIndex);
/**
* Obtains the index of the column with the specified name.
*
* @param aName
* The name of the column.
* @return The index of the column with the specified name.
*/
unsigned long getColumnIndex(in AUTF8String aName);
/**
* Reset parameters/statement execution
*/
void reset();
/**
* Execute the query, ignoring any results. This is accomplished by
* calling executeStep() once, and then calling reset().
*
* Error and last insert info, etc. are available from
* the mozStorageConnection.
*/
void execute();
/**
* Execute a query, using any currently-bound parameters. Reset
* must be called on the statement after the last call of
* executeStep.
*
* @return a boolean indicating whether there are more rows or not;
* row data may be accessed using mozIStorageValueArray methods on
* the statement.
*/
boolean executeStep();
/**
* Execute a query, using any currently-bound parameters. Reset is called
* when no more data is returned. This method is only available to JavaScript
* consumers.
*
* @deprecated As of Mozilla 1.9.2 in favor of executeStep().
*
* @return a boolean indicating whether there are more rows or not.
*
* [deprecated] boolean step();
*/
/**
* Obtains the current list of named parameters, which are settable. This
* property is only available to JavaScript consumers.
*
* readonly attribute mozIStorageStatementParams params;
*/
/**
* Obtains the current row, with access to all the data members by name. This
* property is only available to JavaScript consumers.
*
* readonly attribute mozIStorageStatementRow row;
*/
//////////////////////////////////////////////////////////////////////////////
//// Copied contents of mozIStorageValueArray
/**
* 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;
/**
* The number of entries in the array (each corresponding to a column in the
* database row)
*/
readonly attribute unsigned long numEntries;
/**
* Indicate the data type of the current result row for the the given column.
* SQLite will perform type conversion if you ask for a value as a different
* type than it is stored as.
*
* @param aIndex
* 0-based column index.
* @return 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);
/**
* Retrieve the contents of a column from the current result row as a
* variant.
*
* @param aIndex
* 0-based colummn index.
* @return A variant with the type of the column value.
*/
nsIVariant getVariant(in unsigned long aIndex);
/**
* Retrieve the contents of a column from the current result row as an
* integer.
*
* @param aIndex
* 0-based colummn index.
* @return Column value interpreted as an integer per type conversion rules.
* @{
*/
long getInt32(in unsigned long aIndex);
long long getInt64(in unsigned long aIndex);
/** @} */
/**
* Retrieve the contents of a column from the current result row as a
* floating point double.
*
* @param aIndex
* 0-based colummn index.
* @return Column value interpreted as a double per type conversion rules.
*/
double getDouble(in unsigned long aIndex);
/**
* Retrieve the contents of a column from the current result row as a
* string.
*
* @param aIndex
* 0-based colummn index.
* @return The value for the result column interpreted as a string. If the
* stored value was NULL, you will get an empty string with IsVoid set
* to distinguish it from an explicitly set empty string.
* @{
*/
AUTF8String getUTF8String(in unsigned long aIndex);
AString getString(in unsigned long aIndex);
/** @} */
/**
* Retrieve the contents of a column from the current result row as a
* blob.
*
* @param aIndex
* 0-based colummn index.
* @param[out] aDataSize
* The number of bytes in the blob.
* @param[out] aData
* The contents of the BLOB. This will be NULL if aDataSize == 0.
*/
void getBlob(in unsigned long aIndex, out unsigned long aDataSize, [array,size_is(aDataSize)] out octet aData);
/**
* Retrieve the contents of a Blob column from the current result row as a
* string.
*
* @param aIndex
* 0-based colummn index.
* @return The value for the result Blob column interpreted as a String.
* No encoding conversion is performed.
*/
AString getBlobAsString(in unsigned long aIndex);
/**
* Retrieve the contents of a Blob column from the current result row as a
* UTF8 string.
*
* @param aIndex
* 0-based colummn index.
* @return The value for the result Blob column interpreted as a UTF8 String.
* No encoding conversion is performed.
*/
AUTF8String getBlobAsUTF8String(in unsigned long aIndex);
/**
* Check whether the given column in the current result row is NULL.
*
* @param aIndex
* 0-based colummn index.
* @return true if the value for the result column is null.
*/
boolean getIsNull(in unsigned long aIndex);
/**
* Returns a shared string pointer.
*
* @param aIndex
* 0-based colummn index.
* @param aByteLength
* The number of bytes in the string or blob. This is the same as the
* number of characters for UTF-8 strings, and twice the number of
* characters for UTF-16 strings.
* @param aResult
* A pointer to the string or blob.
*/
[noscript] void getSharedUTF8String(in unsigned long aIndex, out unsigned long aByteLength, [shared,retval] out string aResult);
[noscript] void getSharedString(in unsigned long aIndex, out unsigned long aByteLength, [shared,retval] out wstring aResult);
[noscript] void getSharedBlob(in unsigned long aIndex, out unsigned long aByteLength, [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 int32_t AsInt32(uint32_t idx) {
int32_t v = 0;
mozilla::DebugOnly<nsresult> rv = GetInt32(idx, &v);
MOZ_ASSERT(NS_SUCCEEDED(rv) || IsNull(idx),
"Getting value failed, wrong column index?");
return v;
}
inline int64_t AsInt64(uint32_t idx) {
int64_t v = 0;
mozilla::DebugOnly<nsresult> rv = GetInt64(idx, &v);
MOZ_ASSERT(NS_SUCCEEDED(rv) || IsNull(idx),
"Getting value failed, wrong column index?");
return v;
}
inline double AsDouble(uint32_t idx) {
double v = 0.0;
mozilla::DebugOnly<nsresult> rv = GetDouble(idx, &v);
MOZ_ASSERT(NS_SUCCEEDED(rv) || IsNull(idx),
"Getting value failed, wrong column index?");
return v;
}
inline const char* AsSharedUTF8String(uint32_t idx, uint32_t *len) {
const char *str = nullptr;
*len = 0;
mozilla::DebugOnly<nsresult> rv = GetSharedUTF8String(idx, len, &str);
MOZ_ASSERT(NS_SUCCEEDED(rv) || IsNull(idx),
"Getting value failed, wrong column index?");
return str;
}
inline const char16_t* AsSharedWString(uint32_t idx, uint32_t *len) {
const char16_t *str = nullptr;
*len = 0;
mozilla::DebugOnly<nsresult> rv = GetSharedString(idx, len, &str);
MOZ_ASSERT(NS_SUCCEEDED(rv) || IsNull(idx),
"Getting value failed, wrong column index?");
return str;
}
inline const uint8_t* AsSharedBlob(uint32_t idx, uint32_t *len) {
const uint8_t *blob = nullptr;
*len = 0;
mozilla::DebugOnly<nsresult> rv = GetSharedBlob(idx, len, &blob);
MOZ_ASSERT(NS_SUCCEEDED(rv) || IsNull(idx),
"Getting value failed, wrong column index?");
return blob;
}
inline bool IsNull(uint32_t idx) {
bool b = false;
mozilla::DebugOnly<nsresult> rv = GetIsNull(idx, &b);
MOZ_ASSERT(NS_SUCCEEDED(rv),
"Getting value failed, wrong column index?");
return b;
}
%}
};