| java.lang.Object
 org.apache.xpath.XPathVisitor
All known Subclasses: org.apache.xalan.templates.AbsPathChecker, org.apache.xalan.extensions.ExpressionVisitor, org.apache.xpath.axes.HasPositionalPredChecker, org.apache.xalan.templates.VarNameCollector, org.apache.xalan.templates.XSLTVisitor,
| XPathVisitor | | public class XPathVisitor (Code) | | A derivation from this class can be passed to a class that implements
the XPathVisitable interface, to have the appropriate method called
for each component of the XPath. Aside from possible other uses, the
main intention is to provide a reasonable means to perform expression
rewriting.
Each method has the form
boolean visitComponentType(ExpressionOwner owner, ComponentType compType).
The ExpressionOwner argument is the owner of the component, and can
be used to reset the expression for rewriting. If a method returns
false, the sub hierarchy will not be traversed.
This class is meant to be a base class that will be derived by concrete classes,
and doesn't much except return true for each method.
|
| Method Summary | |
| public boolean | visitBinaryOperation(ExpressionOwner owner, Operation op)
Visit a binary operation.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
op - The operation object. | | public boolean | visitFunction(ExpressionOwner owner, Function func)
Visit a function.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
func - The function reference object. | | public boolean | visitLocationPath(ExpressionOwner owner, LocPathIterator path)
Visit a LocationPath.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
path - The LocationPath object. | | public boolean | visitMatchPattern(ExpressionOwner owner, StepPattern pattern)
Visit a match pattern.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
pattern - The match pattern object. | | public boolean | visitNumberLiteral(ExpressionOwner owner, XNumber num)
Visit a number literal.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
num - The number literal object. | | public boolean | visitPredicate(ExpressionOwner owner, Expression pred)
Visit a predicate within a location path. | | public boolean | visitStep(ExpressionOwner owner, NodeTest step)
Visit a step within a location path.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
step - The Step object. | | public boolean | visitStringLiteral(ExpressionOwner owner, XString str)
Visit a string literal.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
str - The string literal object. | | public boolean | visitUnaryOperation(ExpressionOwner owner, UnaryOperation op)
Visit a unary operation.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
op - The operation object. | | public boolean | visitUnionPath(ExpressionOwner owner, UnionPathIterator path)
Visit a UnionPath.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
path - The UnionPath object. | | public boolean | visitUnionPattern(ExpressionOwner owner, UnionPattern pattern)
Visit a union pattern.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
pattern - The union pattern object. | | public boolean | visitVariableRef(ExpressionOwner owner, Variable var)
Visit a variable reference.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
var - The variable reference object. |
| visitBinaryOperation | | public boolean visitBinaryOperation(ExpressionOwner owner, Operation op)(Code) | | Visit a binary operation.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
op - The operation object. true if the sub expressions should be traversed. |
| visitFunction | | public boolean visitFunction(ExpressionOwner owner, Function func)(Code) | | Visit a function.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
func - The function reference object. true if the sub expressions should be traversed. |
| visitLocationPath | | public boolean visitLocationPath(ExpressionOwner owner, LocPathIterator path)(Code) | | Visit a LocationPath.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
path - The LocationPath object. true if the sub expressions should be traversed. |
| visitMatchPattern | | public boolean visitMatchPattern(ExpressionOwner owner, StepPattern pattern)(Code) | | Visit a match pattern.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
pattern - The match pattern object. true if the sub expressions should be traversed. |
| visitNumberLiteral | | public boolean visitNumberLiteral(ExpressionOwner owner, XNumber num)(Code) | | Visit a number literal.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
num - The number literal object. true if the sub expressions should be traversed. |
| visitPredicate | | public boolean visitPredicate(ExpressionOwner owner, Expression pred)(Code) | | Visit a predicate within a location path. Note that there isn't a
proper unique component for predicates, and that the expression will
be called also for whatever type Expression is.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
pred - The predicate object. true if the sub expressions should be traversed. |
| visitStep | | public boolean visitStep(ExpressionOwner owner, NodeTest step)(Code) | | Visit a step within a location path.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
step - The Step object. true if the sub expressions should be traversed. |
| visitStringLiteral | | public boolean visitStringLiteral(ExpressionOwner owner, XString str)(Code) | | Visit a string literal.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
str - The string literal object. true if the sub expressions should be traversed. |
| visitUnaryOperation | | public boolean visitUnaryOperation(ExpressionOwner owner, UnaryOperation op)(Code) | | Visit a unary operation.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
op - The operation object. true if the sub expressions should be traversed. |
| visitUnionPath | | public boolean visitUnionPath(ExpressionOwner owner, UnionPathIterator path)(Code) | | Visit a UnionPath.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
path - The UnionPath object. true if the sub expressions should be traversed. |
| visitUnionPattern | | public boolean visitUnionPattern(ExpressionOwner owner, UnionPattern pattern)(Code) | | Visit a union pattern.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
pattern - The union pattern object. true if the sub expressions should be traversed. |
| visitVariableRef | | public boolean visitVariableRef(ExpressionOwner owner, Variable var)(Code) | | Visit a variable reference.
Parameters:
owner - The owner of the expression, to which the expression can be reset if rewriting takes place.
Parameters:
var - The variable reference object. true if the sub expressions should be traversed. |
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