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java.lang.Object net.sf.saxon.pattern.Pattern net.sf.saxon.pattern.ConditionalPattern
public class ConditionalPattern
A ConditionalPattern tests a node against one of a number of patterns depending on the value of a condition. This is used only as a streaming selection.
Constructor Summary | |
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ConditionalPattern(Expression[] conditions,
Pattern[] patterns)
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Method Summary | |
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int |
allocateSlots(StaticContext env,
SlotManager slotManager,
int nextFree)
Allocate slots to any variables used within the pattern |
Pattern |
analyze(ExpressionVisitor visitor,
ExpressionVisitor.ContextItemType contextItemType)
Type-check the pattern. |
boolean |
equals(Object other)
Determine whether this pattern is the same as another pattern |
int |
getDependencies()
Get the dependencies of the pattern. |
ItemType |
getItemType()
Get a NodeTest that all the nodes matching this pattern must satisfy |
int |
getNodeKind()
Determine the types of nodes to which this pattern applies. |
int |
hashCode()
Hashcode supporting equals() |
Iterator |
iterateSubExpressions()
Iterate over the subexpressions within this pattern |
boolean |
matches(Item item,
XPathContext context)
Determine if the supplied node matches the pattern |
boolean |
matchesBeneathAnchor(NodeInfo node,
NodeInfo anchor,
XPathContext context)
Determine whether this pattern matches a given Node within the subtree rooted at a given anchor node. |
void |
promote(PromotionOffer offer,
Expression parent)
Offer promotion for subexpressions within this pattern. |
boolean |
replaceSubExpression(Expression original,
Expression replacement)
Replace a subexpression by a replacement subexpression |
void |
setExecutable(Executable executable)
Set the executable containing this pattern |
void |
setLineNumber(int lineNumber)
Override method to set the line number |
void |
setOriginalText(String pattern)
Set the original text |
void |
setSystemId(String systemId)
Override method to set the system ID |
Pattern |
simplify(ExpressionVisitor visitor)
Simplify the pattern: perform any context-independent optimisations |
Methods inherited from class net.sf.saxon.pattern.Pattern |
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getColumnNumber, getContainerGranularity, getDefaultPriority, getExecutable, getFingerprint, getHostLanguage, getLineNumber, getLocationProvider, getPublicId, getSystemId, internalMatches, make, resolveCurrent, selectNodes, toString |
Methods inherited from class java.lang.Object |
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clone, finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public ConditionalPattern(Expression[] conditions, Pattern[] patterns)
Method Detail |
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public void setExecutable(Executable executable)
setExecutable
in class Pattern
executable
- the executablepublic Pattern simplify(ExpressionVisitor visitor) throws XPathException
simplify
in class Pattern
visitor
- an expression visitor
XPathException
public Pattern analyze(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType) throws XPathException
analyze
in class Pattern
visitor
- the expression visitorcontextItemType
- the type of the context item at the point where the pattern
is defined. Set to null if it is known that the context item is undefined.
XPathException
public void promote(PromotionOffer offer, Expression parent) throws XPathException
Unlike the corresponding method on Expression
, this method does not return anything:
it can make internal changes to the pattern, but cannot return a different pattern. Only certain
kinds of promotion are applicable within a pattern: specifically, promotions affecting local
variable references within the pattern.
promote
in class Pattern
offer
- details of the offer, for example the offer to move
expressions that don't depend on the context to an outer level in
the containing expressionparent
-
XPathException
- if any error is detectedpublic boolean replaceSubExpression(Expression original, Expression replacement)
replaceSubExpression
in class Pattern
original
- the expression to be replacedreplacement
- the new expression to be inserted in its place
public void setOriginalText(String pattern)
setOriginalText
in class Pattern
pattern
- the original text of the patternpublic int allocateSlots(StaticContext env, SlotManager slotManager, int nextFree)
allocateSlots
in class Pattern
env
- the static context in the XSLT stylesheetslotManager
- nextFree
- the next slot that is free to be allocated @return the next slot that is free to be allocated
public boolean matches(Item item, XPathContext context) throws XPathException
matches
in class Pattern
item
- the node to be comparedcontext
- The dynamic context. Only relevant if the pattern
uses variables, or contains calls on functions such as document() or key().
XPathException
public boolean matchesBeneathAnchor(NodeInfo node, NodeInfo anchor, XPathContext context) throws XPathException
matchesBeneathAnchor
in class Pattern
node
- The NodeInfo representing the Element or other node to be tested against the Patternanchor
- The anchor node, which must match any AnchorPattern subpatterncontext
- The dynamic context. Only relevant if the pattern
uses variables, or contains calls on functions such as document() or key().
XPathException
public int getNodeKind()
getNodeKind
in class Pattern
public ItemType getItemType()
getItemType
in class Pattern
public int getDependencies()
getDependencies
in class Pattern
public Iterator iterateSubExpressions()
iterateSubExpressions
in class Pattern
public void setSystemId(String systemId)
setSystemId
in class Pattern
systemId
- the URI of the module containing the patternpublic void setLineNumber(int lineNumber)
setLineNumber
in class Pattern
lineNumber
- the line number of the pattern in the source modulepublic boolean equals(Object other)
equals
in class Object
other
- the other objectpublic int hashCode()
hashCode
in class Object
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