org.jaxen.expr
Interface Step
- Predicated, Serializable
- AllNodeStep, CommentNodeStep, NameStep, ProcessingInstructionNodeStep, TextNodeStep
- DefaultAllNodeStep, DefaultCommentNodeStep, DefaultNameStep, DefaultProcessingInstructionNodeStep, DefaultStep, DefaultTextNodeStep
Represents a location step in a LocationPath. The node-set selected by
the location step is the node-set that results from generating an initial
node-set from the axis and node-test, and then filtering that node-set by
each of the predicates in turn.
The initial node-set consists of the nodes having the relationship to the
context node specified by the axis, and having the node type and expanded-name
specified by the node test.
Iterator | axisIterator(Object contextNode, ContextSupport support) - Get an Iterator for the current axis starting in the given contextNode.
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List | evaluate(Context context) - For each node in the given context calls matches() for every node on the
axis, then filters the result by each of the predicates.
|
int | getAxis() - Get an identifier for the current axis.
|
String | getText() - Returns a
String containing the XPath expression.
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boolean | matches(Object node, ContextSupport contextSupport) - Performs the node-test part of evaluating the step for the given node
(which must be on the axis).
|
void | simplify() - Simplifies the XPath step.
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axisIterator
public Iterator axisIterator(Object contextNode,
ContextSupport support)
throws UnsupportedAxisException
Get an Iterator for the current axis starting in the given contextNode.
contextNode
- the node from which to follow this stepsupport
- the remaining context for the traversal
- an iterator over the nodes along the axis
evaluate
public List evaluate(Context context)
throws JaxenException
For each node in the given context calls matches() for every node on the
axis, then filters the result by each of the predicates.
getAxis
public int getAxis()
Get an identifier for the current axis.
getText
public String getText()
Returns a String
containing the XPath expression.
- the text form of this step
matches
public boolean matches(Object node,
ContextSupport contextSupport)
throws JaxenException
Performs the node-test part of evaluating the step for the given node
(which must be on the axis).
- true if the node matches this step; false if it doesn't
simplify
public void simplify()
Simplifies the XPath step. In practice, this is usually a noop.
Jaxen does not currently perform any simplification.