org.apache.xpath.axes
Class UnionChildIterator
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.UnionChildIterator
- All Implemented Interfaces:
- Cloneable, DTMIterator, ExpressionNode, PathComponent, Serializable, javax.xml.transform.SourceLocator, SubContextList, XPathVisitable
- public class UnionChildIterator
- extends ChildTestIterator
This class defines a simplified type of union iterator that only
tests along the child axes. If the conditions are right, it is
much faster than using a UnionPathIterator.
- See Also:
- Serialized Form
Field Summary |
private PredicatedNodeTest[] |
m_nodeTests
Even though these may hold full LocPathIterators, this array does
not have to be cloned, since only the node test and predicate
portion are used, and these only need static information. |
Fields inherited from class org.apache.xpath.Expression |
|
Method Summary |
short |
acceptNode(int n)
Test whether a specified node is visible in the logical view of a
TreeWalker or NodeIterator. |
void |
addNodeTest(PredicatedNodeTest test)
Add a node test to the union list. |
Methods inherited from class org.apache.xpath.axes.LocPathIterator |
allowDetachToRelease, asIterator, asNode, bool, callVisitors, detach, execute, executeCharsToContentHandler, getAnalysisBits, getContext, getCurrentContextNode, getCurrentNode, getCurrentPos, getDTM, getDTMManager, getExpandEntityReferences, getFilter, getFoundLast, getIsTopLevel, getLastPos, getLength, getPrefixResolver, getRoot, getWhatToShow, getXPathContext, incrementCurrentPos, isDocOrdered, isFresh, isMutable, isNodesetExpr, item, previousNode, reset, returnNextNode, runTo, setCurrentContextNode, setCurrentPos, setEnvironment, setIsTopLevel, setItem, setNextPosition, setShouldCacheNodes, size |
Methods inherited from class org.apache.xpath.axes.PredicatedNodeTest |
callPredicateVisitors, canTraverseOutsideSubtree, clone, countProximityPosition, deepEquals, executePredicates, fixupVariables, getLocPathIterator, getPredicate, getPredicateCount, getPredicateIndex, getProximityPosition, getProximityPosition, getProximityPosition, initPredicateInfo, initProximityPosition, isReverseAxes, nodeToString, resetProximityPositions, setLocPathIterator, setPredicateCount |
Methods inherited from class org.apache.xpath.patterns.NodeTest |
calcScore, 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, isSameClass, isStableNumber, num, warn, xstr |
m_nodeTests
private PredicatedNodeTest[] m_nodeTests
- Even though these may hold full LocPathIterators, this array does
not have to be cloned, since only the node test and predicate
portion are used, and these only need static information. However,
also note that index predicates can not be used!
UnionChildIterator
public UnionChildIterator()
- Constructor for UnionChildIterator
addNodeTest
public void addNodeTest(PredicatedNodeTest test)
- Add a node test to the union list.
- Parameters:
test
- reference to a NodeTest, which will be added
directly to the list of node tests (in other words, it will
not be cloned). The parent of this test will be set to
this object.
acceptNode
public short acceptNode(int n)
- Test whether a specified node is visible in the logical view of a
TreeWalker or NodeIterator. This function will be called by the
implementation of TreeWalker and NodeIterator; it is not intended to
be called directly from user code.
- Overrides:
acceptNode
in class PredicatedNodeTest
- Parameters:
n
- The node to check to see if it passes the filter or not.
- Returns:
- a constant to determine whether the node is accepted,
rejected, or skipped, as defined above .