org.apache.xpath.axes
Class OneStepIterator
java.lang.Object
|
+--org.apache.xpath.Expression
|
+--org.apache.xpath.patterns.NodeTest
|
+--org.apache.xpath.axes.PredicatedNodeTest
|
+--org.apache.xpath.axes.LocPathIterator
|
+--org.apache.xpath.axes.BasicTestIterator
|
+--org.apache.xpath.axes.ChildTestIterator
|
+--org.apache.xpath.axes.OneStepIterator
- public class OneStepIterator
- extends ChildTestIterator
This class implements a general iterator for
those LocationSteps with only one step, and perhaps a predicate.
- See Also:
- org.apache.xpath.axes, Serialized Form
- Usage:
- **For advanced use only**
Method Summary |
java.lang.Object |
clone()
Get a cloned iterator. |
DTMIterator |
cloneWithReset()
Get a cloned Iterator that is reset to the beginning
of the query. |
boolean |
deepEquals(Expression expr)
|
void |
detach()
Detaches the iterator from the set which it iterated over, releasing
any computational resources and placing the iterator in the INVALID
state. |
int |
getAxis()
Returns the axis being iterated, if it is known. |
int |
getLength()
The number of nodes in the list. |
boolean |
isReverseAxes()
Tells if this is a reverse axes. |
void |
reset()
Reset the iterator. |
void |
setRoot(int context,
java.lang.Object environment)
Initialize the context values for this expression
after it is cloned. |
Methods inherited from class org.apache.xpath.axes.LocPathIterator |
allowDetachToRelease,
asIterator,
asNode,
bool,
callVisitors,
execute,
executeCharsToContentHandler,
getAnalysisBits,
getContext,
getCurrentContextNode,
getCurrentNode,
getCurrentPos,
getDTM,
getDTMManager,
getExpandEntityReferences,
getFilter,
getFoundLast,
getIsTopLevel,
getLastPos,
getPrefixResolver,
getRoot,
getWhatToShow,
getXPathContext,
incrementCurrentPos,
isDocOrdered,
isFresh,
isMutable,
isNodesetExpr,
item,
previousNode,
runTo,
setCurrentContextNode,
setCurrentPos,
setEnvironment,
setIsTopLevel,
setItem,
setShouldCacheNodes,
size |
Methods inherited from class org.apache.xpath.axes.PredicatedNodeTest |
acceptNode,
callPredicateVisitors,
canTraverseOutsideSubtree,
fixupVariables,
getLocPathIterator,
getPredicate,
getPredicateCount,
getPredicateIndex,
getProximityPosition,
getProximityPosition,
initProximityPosition,
resetProximityPositions,
setLocPathIterator,
setPredicateCount |
Methods inherited from class org.apache.xpath.patterns.NodeTest |
debugWhatToShow,
execute,
execute,
getDefaultScore,
getLocalName,
getNamespace,
getNodeTypeTest,
getStaticScore,
initNodeTest,
initNodeTest,
setLocalName,
setNamespace,
setStaticScore,
setWhatToShow |
Methods inherited from class org.apache.xpath.Expression |
asIteratorRaw,
assertion,
error,
execute,
exprAddChild,
exprGetChild,
exprGetNumChildren,
exprGetParent,
exprSetParent,
getColumnNumber,
getExpressionOwner,
getLineNumber,
getPublicId,
getSystemId,
isStableNumber,
num,
warn,
xstr |
Methods inherited from class java.lang.Object |
equals,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
OneStepIterator
public OneStepIterator(DTMAxisIterator iterator,
int axis)
throws TransformerException
- Create a OneStepIterator object.
- Parameters:
iterator
- The DTM iterator which this iterator will use.axis
- One of Axis.Child, etc., or -1 if the axis is unknown.- Throws:
- TransformerException -
setRoot
public void setRoot(int context,
java.lang.Object environment)
- Initialize the context values for this expression
after it is cloned.
- Parameters:
context
- The XPath runtime context for this
transformation.- Overrides:
- setRoot in class ChildTestIterator
detach
public void detach()
- Detaches the iterator from the set which it iterated over, releasing
any computational resources and placing the iterator in the INVALID
state. After
detach
has been invoked, calls to
nextNode
orpreviousNode
will raise the
exception INVALID_STATE_ERR.
- Overrides:
- detach in class ChildTestIterator
clone
public java.lang.Object clone()
throws java.lang.CloneNotSupportedException
- Get a cloned iterator.
- Returns:
- A new iterator that can be used without mutating this one.
- Throws:
- java.lang.CloneNotSupportedException -
- Overrides:
- clone in class PredicatedNodeTest
cloneWithReset
public DTMIterator cloneWithReset()
throws java.lang.CloneNotSupportedException
- Get a cloned Iterator that is reset to the beginning
of the query.
- Returns:
- A cloned NodeIterator set of the start of the query.
- Throws:
- java.lang.CloneNotSupportedException -
- Overrides:
- cloneWithReset in class ChildTestIterator
isReverseAxes
public boolean isReverseAxes()
- Tells if this is a reverse axes. Overrides AxesWalker#isReverseAxes.
- Returns:
- true for this class.
- Overrides:
- isReverseAxes in class PredicatedNodeTest
getLength
public int getLength()
- The number of nodes in the list. The range of valid child node indices
is 0 to
length-1
inclusive.
- Returns:
- The number of nodes in the list, always greater or equal to zero.
- Overrides:
- getLength in class LocPathIterator
reset
public void reset()
- Reset the iterator.
- Overrides:
- reset in class LocPathIterator
getAxis
public int getAxis()
- Returns the axis being iterated, if it is known.
- Returns:
- Axis.CHILD, etc., or -1 if the axis is not known or is of multiple
types.
- Overrides:
- getAxis in class ChildTestIterator
deepEquals
public boolean deepEquals(Expression expr)
- Overrides:
- deepEquals in class PredicatedNodeTest
- See Also:
Expression.deepEquals(Expression)
Copyright © 2006 Apache XML Project. All Rights Reserved.