public class PathExpression extends NodeSetExpression
staticContext
Constructor | Description |
---|---|
PathExpression(Expression start,
Step step) |
Constructor
|
Modifier and Type | Method | Description |
---|---|---|
void |
display(int level) |
Diagnostic print of expression structure
|
NodeEnumeration |
enumerate(Context context,
boolean sort) |
Evaluate the path-expression in a given context to return a NodeSet
|
int |
getDependencies() |
Determine which aspects of the context the expression depends on.
|
boolean |
isContextDocumentNodeSet() |
Determine, in the case of an expression whose data type is Value.NODESET,
whether all the nodes in the node-set are guaranteed to come from the same
document as the context node.
|
Expression |
reduce(int dep,
Context context) |
Perform a partial evaluation of the expression, by eliminating specified dependencies
on the context.
|
Expression |
simplify() |
Simplify an expression
|
containsReferences, evaluateAsNumber, getStaticContext, indent, make, setStaticContext, usesCurrent
evaluate, evaluateAsBoolean, evaluateAsNodeSet, evaluateAsString, getDataType, outputStringValue, selectFirst
public PathExpression(Expression start, Step step)
start
- A node-set expression denoting the absolute or relative set of nodes from which the
navigation path should start.step
- The step to be followed from each node in the start expression to yield a new
node-setpublic Expression simplify() throws XPathException
simplify
in class Expression
XPathException
public int getDependencies()
getDependencies
in class Expression
public boolean isContextDocumentNodeSet()
isContextDocumentNodeSet
in class Expression
public Expression reduce(int dep, Context context) throws XPathException
reduce
in class Expression
dep
- The dependencies to be removedcontext
- The context to be used for the partial evaluationXPathException
public NodeEnumeration enumerate(Context context, boolean sort) throws XPathException
enumerate
in class NodeSetExpression
context
- the evaluation contextsort
- true if the returned nodes must be in document orderXPathException
- when the expression does not return a nodeset.public void display(int level)
display
in class Expression