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Java Source Code / Java Documentation » XML » saxonb » net.sf.saxon.pattern 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   net.sf.saxon.pattern.Pattern

All known Subclasses:   net.sf.saxon.pattern.NodeTestPattern,  net.sf.saxon.pattern.UnionPattern,  net.sf.saxon.pattern.IDPattern,  net.sf.saxon.pattern.LocationPathPattern,  net.sf.saxon.pattern.KeyPattern,
Pattern
abstract public class Pattern implements Serializable,Container(Code)
A Pattern represents the result of parsing an XSLT pattern string.
Patterns are created by calling the static method Pattern.make(string).
The pattern is used to test a particular node by calling match().




Method Summary
public  Patternanalyze(StaticContext env, ItemType contextItemType)
     Type-check the pattern. Default implementation does nothing.
public  intgetColumnNumber()
    
public  doublegetDefaultPriority()
     Determine the default priority to use if this pattern appears as a match pattern for a template with no explicit priority attribute.
public  intgetDependencies()
     Get the dependencies of the pattern.
public  ExecutablegetExecutable()
    
public  intgetFingerprint()
     Determine the name fingerprint of nodes to which this pattern applies.
public  intgetLineNumber()
    
public  LocationProvidergetLocationProvider()
     Get the LocationProvider allowing location identifiers to be resolved.
public  intgetNodeKind()
     Determine the types of nodes to which this pattern applies.
abstract public  NodeTestgetNodeTest()
    
public  StringgetPublicId()
    
public  StringgetSystemId()
    
protected  booleaninternalMatches(NodeInfo node, XPathContext context)
     Determine whether this Pattern matches the given Node.
public  IteratoriterateSubExpressions()
    
public static  Patternmake(String pattern, StaticContext env, Executable exec)
     Static method to make a Pattern by parsing a String.
abstract public  booleanmatches(NodeInfo node, XPathContext context)
     Determine whether this Pattern matches the given Node.
public  voidpromote(PromotionOffer offer)
     Offer promotion for subexpressions within this pattern.
public  voidsetExecutable(Executable executable)
    
public  voidsetLineNumber(int lineNumber)
    
public  voidsetOriginalText(String text)
    
public  voidsetSystemId(String systemId)
    
public  Patternsimplify(StaticContext env)
     Simplify the pattern by applying any context-independent optimisations.
public  StringtoString()
    



Method Detail
analyze
public Pattern analyze(StaticContext env, ItemType contextItemType) throws XPathException(Code)
Type-check the pattern. Default implementation does nothing. This is only needed for patterns that contain variable references or function calls. the optimised Pattern



getColumnNumber
public int getColumnNumber()(Code)
Get the column number (always -1)



getDefaultPriority
public double getDefaultPriority()(Code)
Determine the default priority to use if this pattern appears as a match pattern for a template with no explicit priority attribute.



getDependencies
public int getDependencies()(Code)
Get the dependencies of the pattern. The only possible dependency for a pattern is on local variables. This is analyzed in those patterns where local variables may appear.



getExecutable
public Executable getExecutable()(Code)



getFingerprint
public int getFingerprint()(Code)
Determine the name fingerprint of nodes to which this pattern applies. Used for optimisation. A fingerprint that the nodes must match, or -1 if it can match multiple fingerprints



getLineNumber
public int getLineNumber()(Code)
Get the line number on which the pattern was defined



getLocationProvider
public LocationProvider getLocationProvider()(Code)
Get the LocationProvider allowing location identifiers to be resolved.



getNodeKind
public int getNodeKind()(Code)
Determine the types of nodes to which this pattern applies. Used for optimisation. For patterns that match nodes of several types, return Type.NODE the type of node matched by this pattern. e.g. Type.ELEMENT or Type.TEXT



getNodeTest
abstract public NodeTest getNodeTest()(Code)
Get a NodeTest that all the nodes matching this pattern must satisfy



getPublicId
public String getPublicId()(Code)
Get the public ID (always null)



getSystemId
public String getSystemId()(Code)
Get the system id of the entity in which the pattern occurred



internalMatches
protected boolean internalMatches(NodeInfo node, XPathContext context) throws XPathException(Code)
Determine whether this Pattern matches the given Node. This is an internal interface used for matching sub-patterns; it does not alter the value of current(). The default implementation is identical to matches().
Parameters:
  node - The NodeInfo representing the Element or other node to be tested against the Pattern
Parameters:
  context - The dynamic context. Only relevant if the patternuses variables, or contains calls on functions such as document() or key(). true if the node matches the Pattern, false otherwise



iterateSubExpressions
public Iterator iterateSubExpressions()(Code)
Iterate over the subexpressions within this pattern



make
public static Pattern make(String pattern, StaticContext env, Executable exec) throws XPathException(Code)
Static method to make a Pattern by parsing a String.

Parameters:
  pattern - The pattern text as a String
Parameters:
  env - An object defining the compile-time context for the expression The pattern object



matches
abstract public boolean matches(NodeInfo node, XPathContext context) throws XPathException(Code)
Determine whether this Pattern matches the given Node. This is the main external interface for matching patterns: it sets current() to the node being tested
Parameters:
  node - The NodeInfo representing the Element or other node to be tested against the Pattern
Parameters:
  context - The dynamic context. Only relevant if the patternuses variables, or contains calls on functions such as document() or key(). true if the node matches the Pattern, false otherwise



promote
public void promote(PromotionOffer offer) throws XPathException(Code)
Offer promotion for subexpressions within this pattern. The offer will be accepted if the subexpression is not dependent on the factors (e.g. the context item) identified in the PromotionOffer. By default the offer is not accepted - this is appropriate in the case of simple expressions such as constant values and variable references where promotion would give no performance advantage. This method is always called at compile time.

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.
Parameters:
  offer - details of the offer, for example the offer to moveexpressions that don't depend on the context to an outer level inthe containing expression
throws:
  net.sf.saxon.trans.XPathException - if any error is detected




setExecutable
public void setExecutable(Executable executable)(Code)



setLineNumber
public void setLineNumber(int lineNumber)(Code)
Set the line number where the pattern occurred



setOriginalText
public void setOriginalText(String text)(Code)
Set the original text of the pattern for use in diagnostics



setSystemId
public void setSystemId(String systemId)(Code)
Set the system ID where the pattern occurred



simplify
public Pattern simplify(StaticContext env) throws XPathException(Code)
Simplify the pattern by applying any context-independent optimisations. Default implementation does nothing. the optimised Pattern



toString
public String toString()(Code)
Get the original pattern text



Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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