Java Doc for XPathFunctionCall.java in  » XML » XPath-Saxon » net » sf » saxon » xpath » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » XML » XPath Saxon » net.sf.saxon.xpath   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.xpath.XPathFunctionCall XPathFunctionCall public class XPathFunctionCall extends FunctionCall (Code) This class is an expression that calls an external function supplied using the JAXP XPathFunction interface Constructor Summary public   XPathFunctionCall(XPathFunction function)      Method Summary public  SequenceIterator call(ValueRepresentation[] argValues, XPathContext context)      Call an extension function previously identified using the bind() method. public  void checkArguments(StaticContext env)      public  int computeCardinality()      public  int getIntrinsicDependencies()      Determine which aspects of the context the expression depends on. public  ItemType getItemType(TypeHierarchy th)      Determine the data type of the expression, if possible. public  SequenceIterator iterate(XPathContext context)      Evaluate the function. public  Expression preEvaluate(StaticContext env)      Constructor Detail XPathFunctionCall public XPathFunctionCall(XPathFunction function)(Code) Default constructor Method Detail call public SequenceIterator call(ValueRepresentation[] argValues, XPathContext context) throws XPathException(Code) Call an extension function previously identified using the bind() method. A subclass can override this method. Parameters:   argValues - The values of the arguments The value returned by the extension function checkArguments public void checkArguments(StaticContext env) throws XPathException(Code) Method called by the expression parser when all arguments have been supplied computeCardinality public int computeCardinality()(Code) Determine the cardinality of the result ZERO_OR_MORE (we don't know) getIntrinsicDependencies public int getIntrinsicDependencies()(Code) Determine which aspects of the context the expression depends on. XPath external functions are given no access to context information so they cannot have any dependencies on it. getItemType public ItemType getItemType(TypeHierarchy th)(Code) Determine the data type of the expression, if possible. All expressions return sequences, in general; this method determines the type of the items within the sequence, assuming that (a) this is known in advance, and (b) it is the same for all items in the sequence. This method will always return a result, though it may be the best approximation that is available at the time. the item type Parameters:   th - iterate public SequenceIterator iterate(XPathContext context) throws XPathException(Code) Evaluate the function. Parameters:   context - The context in which the function is to be evaluated a Value representing the result of the function. throws:   XPathException - if the function cannot be evaluated. preEvaluate public Expression preEvaluate(StaticContext env)(Code) preEvaluate: this method suppresses compile-time evaluation by doing nothing (because the external function might have side-effects and might use the context) 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)