com.ziclix.python.sql

Class PyConnection

java.lang.Object

org.python.core.PyObject

com.ziclix.python.sql.PyConnection

All Implemented Interfaces:

Serializable, ClassDictInit, ContextManager, Traverseproc

public class PyConnection
extends PyObject
implements ClassDictInit, ContextManager, Traverseproc

A connection to the database.

Author:

brian zimmer

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.python.core.PyObject

PyObject.ConversionException

Field Summary

Fields inherited from class org.python.core.PyObject

gcMonitorGlobal, TYPE

Constructor Summary

Constructors

Constructor and Description
PyConnection(Connection connection) Create a PyConnection with the open connection.

Method Summary

Methods

Modifier and Type	Method and Description
PyObject	__enter__()
PyObject	__enter__(ThreadState ts)
boolean	__exit__(PyObject type, PyObject value, PyObject traceback)
boolean	__exit__(ThreadState ts, PyException exception)
PyObject	__findattr_ex__(String name) Finds the attribute.
void	__setattr__(String name, PyObject value) Sets the attribute.
static void	classDictInit(PyObject dict) Method classDictInit
void	close() Close the connection now (rather than whenever __del__ is called).
void	commit() Commit any pending transaction to the database.
PyCursor	cursor() Return a new Cursor Object using the connection.
PyCursor	cursor(boolean dynamicFetch) Return a new Cursor Object using the connection.
PyCursor	cursor(boolean dynamicFetch, PyObject rsType, PyObject rsConcur) Return a new Cursor Object using the connection.
PyObject	nativesql(PyObject nativeSQL) Converts the given SQL statement into the system's native SQL grammar.
boolean	refersDirectlyTo(PyObject ob) Optional operation.
void	rollback() This method is optional since not all databases provide transaction support.
String	toString() Produces a string representation of the object.
int	traverse(Visitproc visit, Object arg) Traverses all directly contained PyObjects.

Methods inherited from class org.python.core.PyObject

__abs__, __add__, __and__, __call__, __call__, __call__, __call__, __call__, __call__, __call__, __call__, __call__, __call__, __call__, __call__, __call__, __call__, __call__, __call__, __cmp__, __coerce__, __coerce_ex__, __complex__, __contains__, __delattr__, __delattr__, __delete__, __delitem__, __delitem__, __delslice__, __delslice__, __dir__, __div__, __divmod__, __ensure_finalizer__, __eq__, __findattr__, __findattr__, __finditem__, __finditem__, __finditem__, __float__, __floordiv__, __format__, __ge__, __get__, __getattr__, __getattr__, __getitem__, __getitem__, __getnewargs__, __getslice__, __getslice__, __gt__, __hash__, __hex__, __iadd__, __iand__, __idiv__, __idivmod__, __ifloordiv__, __ilshift__, __imod__, __imul__, __index__, __int__, __invert__, __ior__, __ipow__, __irshift__, __isub__, __iter__, __iternext__, __itruediv__, __ixor__, __le__, __len__, __long__, __lshift__, __lt__, __mod__, __mul__, __ne__, __neg__, __nonzero__, __not__, __oct__, __or__, __pos__, __pow__, __pow__, __radd__, __rand__, __rdiv__, __rdivmod__, __reduce__, __reduce_ex__, __reduce_ex__, __repr__, __rfloordiv__, __rlshift__, __rmod__, __rmul__, __ror__, __rpow__, __rrshift__, __rshift__, __rsub__, __rtruediv__, __rxor__, __set__, __setattr__, __setitem__, __setitem__, __setitem__, __setslice__, __setslice__, __str__, __sub__, __tojava__, __truediv__, __trunc__, __unicode__, __xor__, _add, _and, _callextra, _cmp, _div, _divmod, _doget, _doget, _doset, _eq, _floordiv, _ge, _gt, _iadd, _iand, _idiv, _idivmod, _ifloordiv, _ilshift, _imod, _imul, _in, _ior, _ipow, _irshift, _is, _isnot, _isub, _itruediv, _ixor, _jcall, _jcallexc, _jthrow, _le, _lshift, _lt, _mod, _mul, _ne, _notin, _or, _pow, _rshift, _sub, _truediv, _xor, asDouble, asIndex, asIndex, asInt, asInt, asIterable, asLong, asLong, asName, asName, asString, asString, asStringOrNull, asStringOrNull, bit_length, conjugate, delDict, delType, dispatch__init__, equals, fastGetClass, fastGetDict, getDict, getType, hashCode, implementsDescrDelete, implementsDescrGet, implementsDescrSet, invoke, invoke, invoke, invoke, invoke, invoke, isCallable, isDataDescr, isIndex, isInteger, isMappingType, isNumberType, isSequenceType, noAttributeError, object___subclasshook__, readonlyAttributeError, setDict, setType

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

PyConnection

public PyConnection(Connection connection)
             throws SQLException

Create a PyConnection with the open connection.

Parameters:

connection -

Throws:

SQLException

Method Detail

toString

public String toString()

Produces a string representation of the object.

Overrides:

toString in class PyObject

Returns:

string representation of the object.

classDictInit

public static void classDictInit(PyObject dict)

Method classDictInit

Parameters:

dict -

__setattr__

public void __setattr__(String name,
               PyObject value)

Sets the attribute.

Overrides:

__setattr__ in class PyObject

Parameters:

name -

value -

See Also:

PyObject.__setattr__(PyString, PyObject)

__findattr_ex__

public PyObject __findattr_ex__(String name)

Finds the attribute.

Overrides:

__findattr_ex__ in class PyObject

Parameters:

name - the name of the attribute of interest

Returns:

the value for the attribute of the specified name

close

public void close()

Close the connection now (rather than whenever __del__ is called). The connection will be unusable from this point forward; an Error (or subclass) exception will be raised if any operation is attempted with the connection. The same applies to all cursor objects trying to use the connection.

commit

public void commit()

Commit any pending transaction to the database. Note that if the database supports an auto-commit feature, this must be initially off. An interface method may be provided to turn it back on.

Database modules that do not support transactions should implement this method with void functionality.

rollback

public void rollback()

This method is optional since not all databases provide transaction support.

In case a database does provide transactions this method causes the database to roll back to the start of any pending transaction. Closing a connection without committing the changes first will cause an implicit rollback to be performed.

nativesql

public PyObject nativesql(PyObject nativeSQL)

Converts the given SQL statement into the system's native SQL grammar. A driver may convert the JDBC sql grammar into its system's native SQL grammar prior to sending it; this method returns the native form of the statement that the driver would have sent.

Parameters:

nativeSQL -

Returns:

the native form of this statement

cursor

public PyCursor cursor()

Return a new Cursor Object using the connection. If the database does not provide a direct cursor concept, the module will have to emulate cursors using other means to the extent needed by this specification.

Returns:

a new cursor using this connection

cursor

public PyCursor cursor(boolean dynamicFetch)

Return a new Cursor Object using the connection. If the database does not provide a direct cursor concept, the module will have to emulate cursors using other means to the extent needed by this specification.

Parameters:

dynamicFetch - if true, dynamically iterate the result

Returns:

a new cursor using this connection

cursor

public PyCursor cursor(boolean dynamicFetch,
              PyObject rsType,
              PyObject rsConcur)

Return a new Cursor Object using the connection. If the database does not provide a direct cursor concept, the module will have to emulate cursors using other means to the extent needed by this specification.

Parameters:

dynamicFetch - if true, dynamically iterate the result

rsType - the type of the underlying ResultSet

rsConcur - the concurrency of the underlying ResultSet

Returns:

a new cursor using this connection

__enter__

public PyObject __enter__(ThreadState ts)

Specified by:

__enter__ in interface ContextManager

__enter__

public PyObject __enter__()

__exit__

public boolean __exit__(ThreadState ts,
               PyException exception)

Specified by:

__exit__ in interface ContextManager

__exit__

public boolean __exit__(PyObject type,
               PyObject value,
               PyObject traceback)

traverse

public int traverse(Visitproc visit,
           Object arg)

Description copied from interface: Traverseproc

Traverses all directly contained PyObjects. Like in CPython, arg must be passed unmodified to visit as its second parameter. If Visitproc.visit(PyObject, Object) returns nonzero, this return value must be returned immediately by traverse. Visitproc.visit(PyObject, Object) must not be called with a null PyObject-argument.

Specified by:

traverse in interface Traverseproc

refersDirectlyTo

public boolean refersDirectlyTo(PyObject ob)

Description copied from interface: Traverseproc

Optional operation. Should only be implemented if it is more efficient than calling Traverseproc.traverse(Visitproc, Object) with a visitproc that just watches out for ob. Must return false if ob is null.

Specified by:

refersDirectlyTo in interface Traverseproc