PyConnection (Jython API documentation)
Date: 2020-03-21

com.ziclix.python.sql

## Class PyConnection

- java.lang.Object
- - org.python.core.PyObject
  - - com.ziclix.python.sql.PyConnection

- All Implemented Interfaces:
    java.io.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(java.sql.Connection connection)` Create a PyConnection with the open connection.

  - ### Method Summary

    All Methods Static Methods Instance Methods Concrete 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__(java.lang.String name)` Finds the attribute.
    `void` | `__setattr__(java.lang.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.
    `java.lang.String` | `toString()` Produces a string representation of the object.
    `int` | `traverse(Visitproc visit, java.lang.Object arg)` Traverses all directly contained `PyObject`s.

    - ### 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(java.sql.Connection connection)
                       throws java.sql.SQLException

      Create a PyConnection with the open connection.
      Parameters:
        `connection` -
      Throws:
        `java.sql.SQLException`

  - ### Method Detail

    - #### toString

          public java.lang.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__(java.lang.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__(java.lang.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,
                              java.lang.Object arg)

      Description copied from interface: `Traverseproc`
      Traverses all directly contained `PyObject`s. 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`

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