de.interactive_instruments.ShapeChange.TargetHelper
Class XpathConstraintNode.Empty

java.lang.Object
  extended by de.interactive_instruments.ShapeChange.TargetHelper.XpathConstraintNode
      extended by de.interactive_instruments.ShapeChange.TargetHelper.XpathConstraintNode.Empty
Enclosing class:
XpathConstraintNode

public static class XpathConstraintNode.Empty
extends XpathConstraintNode

This one stands for the OCL isEmpty() and notEmpty() predicate operations. Which of these is meant is expressed in the state variable negated.


Nested Class Summary
 
Nested classes/interfaces inherited from class de.interactive_instruments.ShapeChange.TargetHelper.XpathConstraintNode
XpathConstraintNode.AllInstances, XpathConstraintNode.Arithmetic, XpathConstraintNode.Attribute, XpathConstraintNode.BindingContext, XpathConstraintNode.Cast, XpathConstraintNode.ChangeCase, XpathConstraintNode.Comparison, XpathConstraintNode.Concatenate, XpathConstraintNode.Empty, XpathConstraintNode.Error, XpathConstraintNode.Exists, XpathConstraintNode.IfThenElse, XpathConstraintNode.KindOf, XpathConstraintNode.Literal, XpathConstraintNode.Logic, XpathConstraintNode.Matches, XpathConstraintNode.MessageComment, XpathConstraintNode.Select, XpathConstraintNode.Size, XpathConstraintNode.Substring, XpathConstraintNode.Unique, XpathConstraintNode.Variable, XpathConstraintNode.XpathFragment, XpathConstraintNode.XpathType
 
Field Summary
 
Fields inherited from class de.interactive_instruments.ShapeChange.TargetHelper.XpathConstraintNode
children, negated, parent, xpathHelper
 
Constructor Summary
XpathConstraintNode.Empty(XpathHelper xpathHelper, boolean neg)
          Ctor
 
Method Summary
 XpathConstraintNode.XpathFragment translate(XpathConstraintNode.BindingContext ctx)
          This compiles the node and its children to an Xpath fragment.
 
Methods inherited from class de.interactive_instruments.ShapeChange.TargetHelper.XpathConstraintNode
addChild, bindsVariable, containsError, generatingAttribute, hasIdentity, hasSimpleType, isAndOrLogic, isDependentOn, isMultiple, isVarOrAttribBased
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

XpathConstraintNode.Empty

public XpathConstraintNode.Empty(XpathHelper xpathHelper,
                                 boolean neg)
Ctor

Parameters:
xpathHelper - The schema object
neg - Flag: isEmpty (false) and notEmpty (true)
Method Detail

translate

public XpathConstraintNode.XpathFragment translate(XpathConstraintNode.BindingContext ctx)

This compiles the node and its children to an Xpath fragment. The translation is essentially the nodeset derived from the object part of the expression, because notEmpty() is fulfilled for a nodeset, which converts to a boolean true. isEmpty() requires an additional not().

Specified by:
translate in class XpathConstraintNode
Parameters:
ctx - BindingContext this node shall be compiled in
Returns:
Object containing the fragment and its operator priority


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