org.apache.commons.jxpath.ri.axes
Class RootContext
- ExpressionContext, Iterator
EvalContext that is used to hold the root node for the path traversal.
$Revision: 1.18 $ $Date: 2004/04/01 02:55:31 $
getContextNodeList , getContextNodePointer , getCurrentNodePointer , getCurrentPosition , getDocumentOrder , getJXPathContext , getNodeSet , getPosition , getRootContext , getSingleNodePointer , getValue , hasNext , isChildOrderingRequired , next , nextNode , nextSet , remove , reset , setPosition , toString |
UNKNOWN_VALUE
public static final Object UNKNOWN_VALUE
getAbsoluteRootContext
public EvalContext getAbsoluteRootContext()
getConstantContext
public EvalContext getConstantContext(Object constant)
getFunction
public Function getFunction(QName functionName,
Object[] parameters)
getRegisteredValue
public Object getRegisteredValue(int id)
getRootContext
public RootContext getRootContext()
Returns the root context of the path, which provides easy
access to variables and functions.
- getRootContext in interface EvalContext
getValue
public Object getValue()
Typically returns the NodeSet by calling getNodeSet(),
but will be overridden for contexts that more naturally produce
individual values, e.g. VariableContext
- getValue in interface EvalContext
nextNode
public boolean nextNode()
Returns true if there is another object in the current set.
Switches the current position and node to the next object.
- nextNode in interface EvalContext
nextSet
public boolean nextSet()
Returns true if there is another sets of objects to interate over.
Resets the current position and node.
- nextSet in interface EvalContext
setPosition
public boolean setPosition(int position)
Moves the current position to the specified index. Used with integer
predicates to quickly get to the n'th element of the node set.
Returns false if the position is out of the node set range.
You can call it with 0 as the position argument to restart the iteration.
- setPosition in interface EvalContext
setRegisteredValue
public int setRegisteredValue(Object value)