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


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

KeyPattern
final public class KeyPattern extends Pattern (Code)
A KeyPattern is a pattern of the form key(keyname, keyvalue)



Constructor Summary
public  KeyPattern(int namecode, Expression key)
    

Method Summary
public  Patternanalyze(StaticContext env, ItemType contextItemType)
     Type-check the pattern.
public  intgetDependencies()
     Get the dependencies of the pattern.
public  NodeTestgetNodeTest()
    
public  IteratoriterateSubExpressions()
    
public  booleanmatches(NodeInfo e, XPathContext context)
     Determine whether this Pattern matches the given Node.
public  voidpromote(PromotionOffer offer)
     Offer promotion for subexpressions within this pattern.


Constructor Detail
KeyPattern
public KeyPattern(int namecode, Expression key)(Code)
Constructor
Parameters:
  namecode - the name of the key
Parameters:
  key - the value of the key: either a StringValue or a VariableReference




Method Detail
analyze
public Pattern analyze(StaticContext env, ItemType contextItemType) throws XPathException(Code)
Type-check the pattern. This is needed for patterns that contain variable references or function calls. the optimised Pattern



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.



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



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



matches
public boolean matches(NodeInfo e, XPathContext context) throws XPathException(Code)
Determine whether this Pattern matches the given Node.
Parameters:
  e - The NodeInfo representing the Element or other node to be tested against the Pattern 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 net.sf.saxon.expr.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




Methods inherited from net.sf.saxon.pattern.Pattern
public Pattern analyze(StaticContext env, ItemType contextItemType) throws XPathException(Code)(Java Doc)
public int getColumnNumber()(Code)(Java Doc)
public double getDefaultPriority()(Code)(Java Doc)
public int getDependencies()(Code)(Java Doc)
public Executable getExecutable()(Code)(Java Doc)
public int getFingerprint()(Code)(Java Doc)
public int getLineNumber()(Code)(Java Doc)
public LocationProvider getLocationProvider()(Code)(Java Doc)
public int getNodeKind()(Code)(Java Doc)
abstract public NodeTest getNodeTest()(Code)(Java Doc)
public String getPublicId()(Code)(Java Doc)
public String getSystemId()(Code)(Java Doc)
protected boolean internalMatches(NodeInfo node, XPathContext context) throws XPathException(Code)(Java Doc)
public Iterator iterateSubExpressions()(Code)(Java Doc)
public static Pattern make(String pattern, StaticContext env, Executable exec) throws XPathException(Code)(Java Doc)
abstract public boolean matches(NodeInfo node, XPathContext context) throws XPathException(Code)(Java Doc)
public void promote(PromotionOffer offer) throws XPathException(Code)(Java Doc)
public void setExecutable(Executable executable)(Code)(Java Doc)
public void setLineNumber(int lineNumber)(Code)(Java Doc)
public void setOriginalText(String text)(Code)(Java Doc)
public void setSystemId(String systemId)(Code)(Java Doc)
public Pattern simplify(StaticContext env) throws XPathException(Code)(Java Doc)
public String toString()(Code)(Java Doc)

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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