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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.FunctionCall
         net.sf.saxon.expr.UserFunctionCall

UserFunctionCall
public class UserFunctionCall extends FunctionCall implements InstructionInfoProvider(Code)
This class represents a call to a function defined in the stylesheet or query. It is used for all user-defined functions in XQuery, and for a limited class of user-defined functions in XSLT: those that can be reduced to the evaluation of a single expression.

Inner Class :public class FunctionCallPackage extends ObjectValue


Constructor Summary
public  UserFunctionCall()
    

Method Summary
public  voidcheckArguments(StaticContext env)
    
public  voidcheckFunctionCall(UserFunction compiledFunction, StaticContext env)
    
public  intcomputeCardinality()
    
public  voiddisplay(int level, NamePool pool, PrintStream out)
    
public  ValueRepresentationdynamicCall(ValueRepresentation[] suppliedArguments, XPathContext context)
     Call the function dynamically.
public  ItemevaluateItem(XPathContext c)
     Call the function, returning the value as an item.
public  Expression[]getArguments()
    
public  UserFunctiongetFunction()
    
public  InstructionInfogetInstructionInfo()
    
public  intgetIntrinsicDependencies()
    
public  ItemTypegetItemType(TypeHierarchy th)
    
public  booleanisConfirmed()
    
public  SequenceIteratoriterate(XPathContext c)
     Call the function, returning an iterator over the results.
public  booleanmarkTailFunctionCalls()
     Mark tail-recursive calls on stylesheet functions.
public  ExpressionpreEvaluate(StaticContext env)
     Pre-evaluate a function at compile time.
public  voidsetConfirmed(boolean conf)
    
public  voidsetFunction(UserFunction compiledFunction, StaticContext env)
    
public  voidsetStaticType(SequenceType type)
    
public  Expressionsimplify(StaticContext env)
    


Constructor Detail
UserFunctionCall
public UserFunctionCall()(Code)




Method Detail
checkArguments
public void checkArguments(StaticContext env) throws XPathException(Code)
Method called during the type checking phase



checkFunctionCall
public void checkFunctionCall(UserFunction compiledFunction, StaticContext env) throws XPathException(Code)
Check the function call against the declared function signature



computeCardinality
public int computeCardinality()(Code)
Determine the cardinality of the result



display
public void display(int level, NamePool pool, PrintStream out)(Code)



dynamicCall
public ValueRepresentation dynamicCall(ValueRepresentation[] suppliedArguments, XPathContext context) throws XPathException(Code)
Call the function dynamically. For this to be possible, the static arguments of the function call must have been set up as SuppliedParameterReference objects. The actual arguments are placed on the callee's stack, and the type conversion takes place "in situ".



evaluateItem
public Item evaluateItem(XPathContext c) throws XPathException(Code)
Call the function, returning the value as an item. This method will be used only when the cardinality is zero or one. If the function is tail recursive, it returns an Object representing the arguments to the next (recursive) call



getArguments
public Expression[] getArguments()(Code)
Get the arguments (the expressions supplied in the function call)



getFunction
public UserFunction getFunction()(Code)
Get the function that is being called by this function call



getInstructionInfo
public InstructionInfo getInstructionInfo()(Code)
Get diagnostic information about this expression



getIntrinsicDependencies
public int getIntrinsicDependencies()(Code)



getItemType
public ItemType getItemType(TypeHierarchy th)(Code)
Determine the data type of the expression, if possible Type.ITEM (meaning not known in advance)
Parameters:
  th -



isConfirmed
public boolean isConfirmed()(Code)
Determine whether this function call is confirmed



iterate
public SequenceIterator iterate(XPathContext c) throws XPathException(Code)
Call the function, returning an iterator over the results. (But if the function is tail recursive, it returns an iterator over the arguments of the recursive call)



markTailFunctionCalls
public boolean markTailFunctionCalls()(Code)
Mark tail-recursive calls on stylesheet functions. For most expressions, this does nothing.



preEvaluate
public Expression preEvaluate(StaticContext env)(Code)
Pre-evaluate a function at compile time. This version of the method suppresses early evaluation by doing nothing.



setConfirmed
public void setConfirmed(boolean conf)(Code)
Set this function as confirmed (the function being called is known to exist) or not



setFunction
public void setFunction(UserFunction compiledFunction, StaticContext env) throws XPathException(Code)
Create the reference to the function to be called, and validate for consistency



setStaticType
public void setStaticType(SequenceType type)(Code)
Set the static type



simplify
public Expression simplify(StaticContext env) throws XPathException(Code)
Simplify the function call



Fields inherited from net.sf.saxon.expr.FunctionCall
protected Expression[] argument(Code)(Java Doc)

Methods inherited from net.sf.saxon.expr.FunctionCall
protected int checkArgumentCount(int min, int max, StaticContext env) throws XPathException(Code)(Java Doc)
abstract protected void checkArguments(StaticContext env) throws XPathException(Code)(Java Doc)
public void display(int level, NamePool pool, PrintStream out)(Code)(Java Doc)
final public String getDisplayName(NamePool pool)(Code)(Java Doc)
final public int getFunctionNameCode()(Code)(Java Doc)
final public int getNumberOfArguments()(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 preEvaluate(StaticContext env) throws XPathException(Code)(Java Doc)
public Expression promote(PromotionOffer offer) throws XPathException(Code)(Java Doc)
public void setArguments(Expression[] args)(Code)(Java Doc)
final public void setFunctionNameCode(int nc)(Code)(Java Doc)
public Expression simplify(StaticContext env) throws XPathException(Code)(Java Doc)
final protected Expression simplifyArguments(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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