Package org.htmlunit.xpath.axes
Class OneStepIteratorForward
- java.lang.Object
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- All Implemented Interfaces:
java.lang.Cloneable,javax.xml.transform.SourceLocator,PathComponent,SubContextList,ExpressionNode,DTMIterator,XPathVisitable
public class OneStepIteratorForward extends ChildTestIterator
This class implements a general iterator for those LocationSteps with only one step, and perhaps a predicate, that only go forward (i.e. it can not be used with ancestors, preceding, etc.)
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Field Summary
Fields Modifier and Type Field Description protected intm_axisThe traversal axis from where the nodes will be filtered.-
Fields inherited from class org.htmlunit.xpath.axes.ChildTestIterator
m_traverser
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Fields inherited from class org.htmlunit.xpath.axes.LocPathIterator
m_cdtm, m_clones, m_context, m_currentContextNode, m_execContext, m_lastFetched, m_length, m_pos, m_stackFrame
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Fields inherited from class org.htmlunit.xpath.axes.PredicatedNodeTest
DEBUG_PREDICATECOUNTING, m_foundLast, m_lpi, m_predCount, m_predicateIndex, m_proximityPositions
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Fields inherited from class org.htmlunit.xpath.patterns.NodeTest
m_name, m_whatToShow, SCORE_NODETEST, SCORE_NONE, SCORE_NSWILD, SCORE_OTHER, SCORE_QNAME, SHOW_BYFUNCTION, WILD
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Fields inherited from interface org.htmlunit.xpath.xml.dtm.DTMIterator
FILTER_ACCEPT, FILTER_SKIP
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Constructor Summary
Constructors Constructor Description OneStepIteratorForward(Compiler compiler, int opPos, int analysis)Create a OneStepIterator object.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description booleandeepEquals(Expression expr)Compare this object with another object and see if they are equal, include the sub heararchy.intgetAxis()Returns the axis being iterated, if it is known.protected intgetNextNode()Get the next node via getNextXXX.voidsetRoot(int context, java.lang.Object environment)Reset the root node of theDTMIterator, overriding the value specified when it was created.-
Methods inherited from class org.htmlunit.xpath.axes.ChildTestIterator
cloneWithReset, detach
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Methods inherited from class org.htmlunit.xpath.axes.BasicTestIterator
nextNode
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Methods inherited from class org.htmlunit.xpath.axes.LocPathIterator
asIterator, asNode, bool, callVisitors, execute, getAnalysisBits, getCurrentNode, getCurrentPos, getDTM, getDTMManager, getExpandEntityReferences, getIsTopLevel, getLastPos, getLength, getPrefixResolver, getRoot, getWhatToShow, getXPathContext, incrementCurrentPos, isDocOrdered, isFresh, item, previousNode, reset, returnNextNode, runTo, setCurrentPos, setIsTopLevel, setShouldCacheNodes
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Methods inherited from class org.htmlunit.xpath.axes.PredicatedNodeTest
acceptNode, callPredicateVisitors, canTraverseOutsideSubtree, clone, countProximityPosition, executePredicates, getPredicate, getPredicateCount, getProximityPosition, getProximityPosition, getProximityPosition, initPredicateInfo, initProximityPosition, isReverseAxes, nodeToString, resetProximityPositions, setLocPathIterator, setPredicateCount
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Methods inherited from class org.htmlunit.xpath.patterns.NodeTest
calcScore, execute, execute, getLocalName, getNamespace, getNodeTypeTest, getStaticScore, initNodeTest, initNodeTest, setLocalName, setNamespace, setStaticScore, setWhatToShow
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Methods inherited from class org.htmlunit.xpath.Expression
assertion, error, execute, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isSameClass, isStableNumber, num
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Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface org.htmlunit.xpath.xml.dtm.DTMIterator
clone
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Constructor Detail
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OneStepIteratorForward
OneStepIteratorForward(Compiler compiler, int opPos, int analysis) throws javax.xml.transform.TransformerException
Create a OneStepIterator object.- Parameters:
compiler- A reference to the Compiler that contains the op map.opPos- The position within the op map, which contains the location path expression for this itterator.- Throws:
javax.xml.transform.TransformerException- if any
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Method Detail
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setRoot
public void setRoot(int context, java.lang.Object environment)Reset the root node of theDTMIterator, overriding the value specified when it was created. Note the root node is not the root node of the document tree, but the context node from where the iteration begins.- Specified by:
setRootin interfaceDTMIterator- Overrides:
setRootin classChildTestIterator- Parameters:
context- int Handle of the context node.environment- The environment object. The environment in which this iterator operates, which should provide:- a node (the context node... same value as "root" defined below)
- a pair of non-zero positive integers (the context position and the context size)
- a set of variable bindings
- a function library
- the set of namespace declarations in scope for the expression.
At this time the exact implementation of this environment is application dependent. Probably a proper interface will be created fairly soon.
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getNextNode
protected int getNextNode()
Get the next node via getNextXXX. Bottlenecked for derived class override.- Overrides:
getNextNodein classChildTestIterator- Returns:
- The next node on the axis, or DTM.NULL.
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getAxis
public int getAxis()
Returns the axis being iterated, if it is known.- Specified by:
getAxisin interfaceDTMIterator- Overrides:
getAxisin classChildTestIterator- Returns:
- Axis.CHILD, etc., or -1 if the axis is not known or is of multiple types.
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deepEquals
public boolean deepEquals(Expression expr)
Compare this object with another object and see if they are equal, include the sub heararchy.- Overrides:
deepEqualsin classPredicatedNodeTest- Parameters:
expr- Another expression object.- Returns:
- true if this objects class and the expr object's class are the same, and the data contained within both objects are considered equal.
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