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


java.lang.Object
   net.sf.saxon.expr.ComputedExpression
      net.sf.saxon.expr.UnaryExpression
         net.sf.saxon.expr.InstanceOfExpression

InstanceOfExpression
final public class InstanceOfExpression extends UnaryExpression (Code)
InstanceOf Expression: implements "Expr instance of data-type"


Field Summary
 inttargetCardinality
    
 ItemTypetargetType
    

Constructor Summary
public  InstanceOfExpression(Expression source, SequenceType target)
    

Method Summary
public  intcomputeCardinality()
    
public  voiddisplay(int level, NamePool pool, PrintStream out)
    
protected  StringdisplayOperator(NamePool pool)
    
public  booleaneffectiveBooleanValue(XPathContext context)
    
public  booleanequals(Object other)
    
public  ItemevaluateItem(XPathContext context)
    
public  ItemTypegetItemType(TypeHierarchy th)
    
public  Expressionoptimize(Optimizer opt, StaticContext env, ItemType contextItemType)
     Perform optimisation of an expression and its subexpressions.

This method is called after all references to functions and variables have been resolved to the declaration of the function or variable, and after all type checking has been done.


Parameters:
  opt - the optimizer in use.
public  ExpressiontypeCheck(StaticContext env, ItemType contextItemType)
    

Field Detail
targetCardinality
int targetCardinality(Code)



targetType
ItemType targetType(Code)




Constructor Detail
InstanceOfExpression
public InstanceOfExpression(Expression source, SequenceType target)(Code)




Method Detail
computeCardinality
public int computeCardinality()(Code)
Determine the cardinality



display
public void display(int level, NamePool pool, PrintStream out)(Code)
Diagnostic print of expression structure



displayOperator
protected String displayOperator(NamePool pool)(Code)
Give a string representation of the operator for use in diagnostics the operator, as a string



effectiveBooleanValue
public boolean effectiveBooleanValue(XPathContext context) throws XPathException(Code)
Evaluate the expression as a boolean



equals
public boolean equals(Object other)(Code)
Is this expression the same as another expression?



evaluateItem
public Item evaluateItem(XPathContext context) throws XPathException(Code)
Evaluate the expression



getItemType
public ItemType getItemType(TypeHierarchy th)(Code)
Determine the data type of the result of the InstanceOf expression
Parameters:
  th -



optimize
public Expression optimize(Optimizer opt, StaticContext env, ItemType contextItemType) throws XPathException(Code)
Perform optimisation of an expression and its subexpressions.

This method is called after all references to functions and variables have been resolved to the declaration of the function or variable, and after all type checking has been done.


Parameters:
  opt - the optimizer in use. This provides access to supporting functions; it also allowsdifferent optimization strategies to be used in different circumstances.
Parameters:
  env - the static context of the expression
Parameters:
  contextItemType - the static type of "." at the point where this expression is invoked.The parameter is set to null if it is known statically that the context item will be undefined.If the type of the context item is not known statically, the argument is set tonet.sf.saxon.type.Type.ITEM_TYPE the original expression, rewritten if appropriate to optimize execution
throws:
  net.sf.saxon.trans.StaticError - if an error is discovered during this phase(typically a type error)



typeCheck
public Expression typeCheck(StaticContext env, ItemType contextItemType) throws XPathException(Code)
Type-check the expression the checked expression



Fields inherited from net.sf.saxon.expr.UnaryExpression
protected Expression operand(Code)(Java Doc)

Methods inherited from net.sf.saxon.expr.UnaryExpression
public int computeCardinality()(Code)(Java Doc)
public int computeSpecialProperties()(Code)(Java Doc)
public void display(int level, NamePool pool, PrintStream out)(Code)(Java Doc)
abstract protected String displayOperator(NamePool pool)(Code)(Java Doc)
public boolean equals(Object other)(Code)(Java Doc)
public Expression getBaseExpression()(Code)(Java Doc)
public ItemType getItemType(TypeHierarchy th)(Code)(Java Doc)
public int hashCode()(Code)(Java Doc)
public Iterator iterateSubExpressions()(Code)(Java Doc)
public Expression optimize(Optimizer opt, StaticContext env, ItemType contextItemType) throws XPathException(Code)(Java Doc)
public Expression promote(PromotionOffer offer) throws XPathException(Code)(Java Doc)
public Expression simplify(StaticContext env) throws XPathException(Code)(Java Doc)
public Expression typeCheck(StaticContext env, ItemType contextItemType) throws XPathException(Code)(Java Doc)

Fields inherited from net.sf.saxon.expr.ComputedExpression
protected int locationId(Code)(Java Doc)
protected int staticProperties(Code)(Java Doc)

Methods inherited from net.sf.saxon.expr.ComputedExpression
public void adoptChildExpression(Expression child)(Code)(Java Doc)
public void checkPermittedContents(SchemaType parentType, StaticContext env, boolean whole) throws XPathException(Code)(Java Doc)
abstract protected int computeCardinality()(Code)(Java Doc)
public int computeDependencies()(Code)(Java Doc)
public int computeSpecialProperties()(Code)(Java Doc)
final public void computeStaticProperties()(Code)(Java Doc)
final public Expression doPromotion(Expression subexpression, PromotionOffer offer) throws XPathException(Code)(Java Doc)
protected void dynamicError(String message, XPathContext context) throws DynamicError(Code)(Java Doc)
protected void dynamicError(String message, String code, XPathContext context) throws DynamicError(Code)(Java Doc)
public boolean effectiveBooleanValue(XPathContext context) throws XPathException(Code)(Java Doc)
public String evaluateAsString(XPathContext context) throws XPathException(Code)(Java Doc)
public Item evaluateItem(XPathContext context) throws XPathException(Code)(Java Doc)
public int getCardinality()(Code)(Java Doc)
public int getColumnNumber()(Code)(Java Doc)
protected int getConstructType()(Code)(Java Doc)
public int getDependencies()(Code)(Java Doc)
public Executable getExecutable()(Code)(Java Doc)
public int getImplementationMethod()(Code)(Java Doc)
public InstructionInfo getInstructionInfo()(Code)(Java Doc)
public int getIntrinsicDependencies()(Code)(Java Doc)
public int getLineNumber()(Code)(Java Doc)
final public int getLocationId()(Code)(Java Doc)
public LocationProvider getLocationProvider()(Code)(Java Doc)
public Container getParentExpression()(Code)(Java Doc)
final public String getPublicId()(Code)(Java Doc)
public int[] getSlotsUsed()(Code)(Java Doc)
final public int getSpecialProperties()(Code)(Java Doc)
public String getSystemId()(Code)(Java Doc)
public boolean hasBadParentPointer()(Code)(Java Doc)
public SequenceIterator iterate(XPathContext context) throws XPathException(Code)(Java Doc)
public Iterator iterateSubExpressions()(Code)(Java Doc)
public boolean markTailFunctionCalls()(Code)(Java Doc)
public void process(XPathContext context) throws XPathException(Code)(Java Doc)
public Expression promote(PromotionOffer offer) throws XPathException(Code)(Java Doc)
final public void resetStaticProperties()(Code)(Java Doc)
public void setLocationId(int id)(Code)(Java Doc)
public void setParentExpression(Container parent)(Code)(Java Doc)
public Expression simplify(StaticContext env) throws XPathException(Code)(Java Doc)
public void suppressValidation(int validationMode)(Code)(Java Doc)
protected void typeError(String message, XPathContext context) throws DynamicError(Code)(Java Doc)
protected void typeError(String message, String errorCode, XPathContext context) throws DynamicError(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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