The class Value represents a value, which is fetched from the database.
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#include <value.h>
Public Member Functions |
| Value (IValue *value=0) |
template<typename T > |
bool | getValue (T &ret) const |
| Explicit data-access.
|
template<typename T > |
bool | get (T &ret) const |
| Shorter name for getValue.
|
bool | operator! () const |
| Returns true, if this class is not connected to a actual statement.
|
const IValue * | getImpl () const |
| Returns the actual implementation-class.
|
|
bool | isNull () const |
| Explicit data-access.
|
bool | getBool () const |
| return true, when value represents boolean true.
|
short | getShort () const |
| tries to convert value into an short.
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int | getInt () const |
| tries to convert value into an int.
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long | getLong () const |
| tries to convert value into an long.
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unsigned short | getUnsignedShort () const |
| tries to convert value into an unsigned short.
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unsigned | getUnsigned () const |
| tries to convert value into an unsigned.
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unsigned long | getUnsignedLong () const |
| tries to convert value into an unsigned long.
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int32_t | getInt32 () const |
| tries to convert value into an int32_t.
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uint32_t | getUnsigned32 () const |
| tries to convert value into an uint32_t.
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int64_t | getInt64 () const |
| tries to convert value into an int64_t.
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uint64_t | getUnsigned64 () const |
| tries to convert value into an uint64_t.
|
Decimal | getDecimal () const |
| tries to convert value into a Decimal.
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float | getFloat () const |
| tries to convert value into an float.
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double | getDouble () const |
| tries to convert value into an double.
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char | getChar () const |
| returns the first character of the text-representation.
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std::string | getString () const |
| returns the value as a string.
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void | getString (std::string &ret) const |
| fills the passed string with the value.
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Blob | getBlob () const |
| Returns the value as a blob.
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void | getBlob (Blob &blob) const |
| Returns the value as a blob.
|
Date | getDate () const |
| returns the value as a Date.
|
Time | getTime () const |
| returns the value as a Time.
|
Datetime | getDatetime () const |
| returns the value as a Datetime.
|
Detailed Description
The class Value represents a value, which is fetched from the database.
Member Function Documentation
template<typename T >
bool tntdb::Value::get |
( |
T & |
ret | ) |
const |
|
inline |
Shorter name for getValue.
Blob tntdb::Value::getBlob |
( |
| ) |
const |
|
inline |
Returns the value as a blob.
This is more or less an alias to getString just to stress, that the data is truly binary and not some text value.
void tntdb::Value::getBlob |
( |
Blob & |
blob | ) |
const |
|
inline |
Returns the value as a blob.
bool tntdb::Value::getBool |
( |
| ) |
const |
|
inline |
return true, when value represents boolean true.
char tntdb::Value::getChar |
( |
| ) |
const |
|
inline |
returns the first character of the text-representation.
Date tntdb::Value::getDate |
( |
| ) |
const |
|
inline |
returns the value as a Date.
Datetime tntdb::Value::getDatetime |
( |
| ) |
const |
|
inline |
Decimal tntdb::Value::getDecimal |
( |
| ) |
const |
|
inline |
tries to convert value into a Decimal.
double tntdb::Value::getDouble |
( |
| ) |
const |
|
inline |
tries to convert value into an double.
float tntdb::Value::getFloat |
( |
| ) |
const |
|
inline |
tries to convert value into an float.
const IValue* tntdb::Value::getImpl |
( |
| ) |
const |
|
inline |
Returns the actual implementation-class.
int tntdb::Value::getInt |
( |
| ) |
const |
|
inline |
tries to convert value into an int.
int32_t tntdb::Value::getInt32 |
( |
| ) |
const |
|
inline |
tries to convert value into an int32_t.
int64_t tntdb::Value::getInt64 |
( |
| ) |
const |
|
inline |
tries to convert value into an int64_t.
long tntdb::Value::getLong |
( |
| ) |
const |
|
inline |
tries to convert value into an long.
short tntdb::Value::getShort |
( |
| ) |
const |
|
inline |
tries to convert value into an short.
std::string tntdb::Value::getString |
( |
| ) |
const |
|
inline |
returns the value as a string.
void tntdb::Value::getString |
( |
std::string & |
ret | ) |
const |
|
inline |
fills the passed string with the value.
this might be slightly more efficient than just returning a new string since one copy is saved.
Time tntdb::Value::getTime |
( |
| ) |
const |
|
inline |
returns the value as a Time.
unsigned tntdb::Value::getUnsigned |
( |
| ) |
const |
|
inline |
tries to convert value into an unsigned.
uint32_t tntdb::Value::getUnsigned32 |
( |
| ) |
const |
|
inline |
tries to convert value into an uint32_t.
uint64_t tntdb::Value::getUnsigned64 |
( |
| ) |
const |
|
inline |
tries to convert value into an uint64_t.
unsigned long tntdb::Value::getUnsignedLong |
( |
| ) |
const |
|
inline |
tries to convert value into an unsigned long.
unsigned short tntdb::Value::getUnsignedShort |
( |
| ) |
const |
|
inline |
tries to convert value into an unsigned short.
template<typename T >
bool tntdb::Value::getValue |
( |
T & |
ret | ) |
const |
|
inline |
Explicit data-access.
The get-template return false if the value is null. Otherwise the passed reference is filled with the value. If the value can't be converted to the requested type, a exception of type tntdb::TypeError is thrown.
In contrast to the getXXX-methods the type is not specified explictely but determined by the passed reference.
The extraction is actually done using the operator>> with a l-value of const Value& and a r-value of a reference to the actual type. This operator is defined for standard types and may be defined for user defined types.
bool tntdb::Value::isNull |
( |
| ) |
const |
|
inline |
Explicit data-access.
The getXXX-methods return the value in the requested type. If the value can't be converted to the requested type, a exception of type tntdb::TypeError is thrown.return true, when value is null
bool tntdb::Value::operator! |
( |
| ) |
const |
|
inline |
Returns true, if this class is not connected to a actual statement.
The documentation for this class was generated from the following file: