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Java Source Code / Java Documentation » XML » XPath Saxon » net.sf.saxon.functions

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.functions .SystemFunction

net.sf.saxon.functions .BooleanFn

BooleanFn
public class BooleanFn extends SystemFunction (Code)
	This class supports the XPath functions boolean(), not(), true(), and false()

Field Summary
final public static int	BOOLEAN
final public static int	FALSE
final public static int	NOT
final public static int	TRUE

Method Summary
public void	checkArguments(StaticContext env)
public boolean	effectiveBooleanValue(XPathContext c)
public Item	evaluateItem(XPathContext context)
public Expression	optimize(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.

Field Detail

BOOLEAN
final public static int BOOLEAN(Code)

FALSE
final public static int FALSE(Code)

NOT
final public static int NOT(Code)

TRUE
final public static int TRUE(Code)

Method Detail

checkArguments
public void checkArguments(StaticContext env) throws XPathException(Code)
	Static analysis: prevent sorting of the argument

effectiveBooleanValue
public boolean effectiveBooleanValue(XPathContext c) throws XPathException(Code)
	Evaluate the effective boolean value

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

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)

Fields inherited from net.sf.saxon.functions.SystemFunction

protected int operation(Code)(Java Doc)

Methods inherited from net.sf.saxon.functions.SystemFunction

final protected void addContextDocumentArgument(int pos, String augmentedName) throws StaticError(Code)(Java Doc)
public void checkArguments(StaticContext env) throws XPathException(Code)(Java Doc)
public int computeCardinality()(Code)(Java Doc)
public int computeSpecialProperties()(Code)(Java Doc)
public void display(int level, NamePool pool, PrintStream out)(Code)(Java Doc)
protected StandardFunction.Entry getDetails()(Code)(Java Doc)
public String getErrorCodeForTypeErrors()(Code)(Java Doc)
public ItemType getItemType(TypeHierarchy th)(Code)(Java Doc)
protected SequenceType getRequiredType(int arg)(Code)(Java Doc)
public static void main(String[] args) throws Exception(Code)(Java Doc)
public static FunctionCall makeSystemFunction(String name, int arity, NamePool pool)(Code)(Java Doc)
public void setDetails(StandardFunction.Entry entry)(Code)(Java Doc)
final protected void useContextItemAsDefault()(Code)(Java Doc)

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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