SqlUtil::Columns Class Reference

column container class that throws an exception if an unknown column is accessed More...

Inheritance diagram for SqlUtil::Columns:

Public Member Methods
	add (string k, AbstractColumn val)
	adds the given value to the hash with the given key name
	constructor (*hash c)
	creates the object from the argument
	constructor (Columns old)
	creates a copy of the object
bool	equal (Columns cols)
	returns True if the argument has the same columns in the same order as the current object, False if not
string	getElementName ()
	returns "column" since this object stores column objects
AbstractIterator	getSqlColumnNameIterator ()
	returns an iterator for column SQL names
AbstractColumn	memberGate (string k)
	returns the AbstractColumn object corresponding to the key given or throws a KEY-ERROR exception More...
Columns	subset (softlist l)
	returns a subset of the current columns according to the list<auto> argument
AbstractColumn	take (string k)
	removes the given key from the contained hash and returns the value
Public Member Methods inherited from SqlUtil::AbstractHashContainer
	clear ()
	purges the contained data More...
	constructor (*hash nh)
	creates the object with the hash argument passed
	constructor (AbstractHashContainer old)
	creates a copy of the object
	copy (AbstractHashContainer old)
	creates a "deep copy" of the object
bool	empty ()
	returns True if the container is empty, False if not
*string	firstKey ()
	Returns the first key name in the contained hash or NOTHING if the contained hash has no keys. More...
*hash< auto >	getHash ()
	returns the hash contained by this object
bool	hasKey (string k)
	Returns True if the key exists in the contained hash (may or may not be assigned a value), False if not. More...
bool	hasKeyValue (string k)
	Returns True if the key exists in the contained hash and is assigned a value, False if not. More...
Qore::AbstractIterator	iterator ()
	Returns a HashIterator object for the contained hash. More...
Qore::AbstractIterator	keyIterator ()
	Returns a HashKeyIterator object for the contained hash. More...
list< string >	keys ()
	Returns a list of key names of the contained hash. More...
*string	lastKey ()
	Returns the last key name in the contained hash or NOTHING if the contained hash has no keys. More...
bool	matchKeys (hash h1)
	returns True if the hash argument has the same keys (in any order), False if not More...
bool	matchKeys (list< auto > l)
	returns True if the list<auto> argument has the same list of key strings as the keys in the object (in any order), False if not More...
bool	matchKeys (AbstractHashContainer c)
	returns True if the container argument has the same keys (in any order), False if not More...
auto	memberGate (string k)
	returns the value of the given key in the contained hash if it exists, otherwise throws a KEY-ERROR exception More...
Qore::AbstractIterator	pairIterator ()
	Returns a HashPairIterator object for the contained hash. More...
bool	partialMatchKeys (hash h1)
	returns True if the hash argument has at least the same keys (in any order, can have more keys), False if not More...
bool	partialMatchKeys (list< auto > l)
	returns True if the list<auto> argument has at least the same keys (in any order, can have more keys), False if not More...
bool	partialMatchKeys (AbstractHashContainer c)
	returns True if the container argument has at least the same keys (in any order, can have more keys), False if not More...
	renameKey (string old_name, string new_name)
	renames the given key; maintains the key order
int	size ()
	Returns the number of keys in the contained hash. More...
bool	val ()
	Returns False if the contained hash has no keys, True if it does. More...
list< auto >	values ()
	Returns a list of values of the contained hash. More...

Additional Inherited Members
Private Attributes inherited from SqlUtil::AbstractHashContainer
*hash	h
	the data to be contained

Detailed Description

column container class that throws an exception if an unknown column is accessed

Member Function Documentation

memberGate()

AbstractColumn SqlUtil::Columns::memberGate

(

string

k

)

returns the AbstractColumn object corresponding to the key given or throws a KEY-ERROR exception

Example:

AbstractColumn c = cols.id;

Parameters

k	the name of the key to access

Returns

the value of the given key in the contained hash if it exists

Exceptions

KEY-ERROR

the given key does not exist in the contained hash

Note

this method is called automatically when an unknown or inaccessible member name is accessed from outside the class

See also

memberGate() Method