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Module BasicClasses :: Class Formula
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Class Formula

    object --+    
             |    
      BIObject --+
                 |
    object --+   |
             |   |
BIXMLWriteable --+
                 |
                Formula

The representation of a single relationship formula. The formulas are built as trees, where each node in the tree is a FormulaNode, which can be either a relationship (RelNode), or an entity EntityNode. The Formula instance holds the root node of the formula tree.
Method Summary
  __init__(self, oStack, attrs, **args)
  addArgument(self, root)
Define the root node of the formula.
  writeXMLNestedItems(self, out, indent)
    Inherited from BIXMLWriteable
  writeXML(self, out, indent, **kwArgs)
Outputs the complete XML representation of the given object.
  writeXMLClose(self, out, indent)
Prints the closing tag of the object: </tag>.
  writeXMLOpen(self, out, indent, closing)
Writes opening tag into the XML output.
  XMLAttrs(self)
Computes the string representation of the object's attributes, which are included into the XML tag.
    Inherited from object
  __delattr__(...)
x.__delattr__('name') <==> del x.name
  __getattribute__(...)
x.__getattribute__('name') <==> x.name
  __hash__(x)
x.__hash__() <==> hash(x)
  __reduce__(...)
helper for pickle
  __reduce_ex__(...)
helper for pickle
  __repr__(x)
x.__repr__() <==> repr(x)
  __setattr__(...)
x.__setattr__('name', value) <==> x.name = value
  __str__(x)
x.__str__() <==> str(x)
    Inherited from type
  __new__(T, S, ...)
T.__new__(S, ...) -> a new object with type S, a subtype of T

Instance Variable Summary
RelNode rootNode: The root node of the formula.

Class Variable Summary
str XMLTag = 'formula'
    Inherited from BIXMLWriteable
list persistentAttrs: The list of attributes to be included in the XML output.

Method Details

addArgument(self, root)

Define the root node of the formula.
Parameters:
root - The root node.
           (type=RelNode)

Instance Variable Details

rootNode

The root node of the formula.
Type:
RelNode

Class Variable Details

XMLTag

Type:
str
Value:
'formula'

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