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


java.lang.Object
   net.sf.saxon.expr.ComputedExpression
      net.sf.saxon.instruct.Instruction
         net.sf.saxon.instruct.While

While
public class While extends Instruction (Code)
Handler for saxon:while elements in stylesheet.
The saxon:while element has a mandatory attribute test, a boolean expression. The content is output repeatedly so long as the test condition is true.



Constructor Summary
public  While(Expression test, Expression action)
    

Method Summary
final public  booleancreatesNewNodes()
     Determine whether this instruction creates new nodes.
public  voiddisplay(int level, NamePool pool, PrintStream out)
     Diagnostic print of expression structure.
public  ExpressiongetActionExpression()
    
public  intgetInstructionNameCode()
    
public  ItemTypegetItemType(TypeHierarchy th)
    
public  IteratoriterateSubExpressions()
    
public  Expressionoptimize(Optimizer opt, StaticContext env, ItemType contextItemType)
    
public  TailCallprocessLeavingTail(XPathContext context)
    
protected  voidpromoteInst(PromotionOffer offer)
     Handle promotion offers, that is, non-local tree rewrites.
public  Expressionsimplify(StaticContext env)
     Simplify an expression.
public  ExpressiontypeCheck(StaticContext env, ItemType contextItemType)
    


Constructor Detail
While
public While(Expression test, Expression action)(Code)




Method Detail
createsNewNodes
final public boolean createsNewNodes()(Code)
Determine whether this instruction creates new nodes. This implementation returns true if the "action" creates new nodes. (Nodes created by the condition can't contribute to the result).



display
public void display(int level, NamePool pool, PrintStream out)(Code)
Diagnostic print of expression structure. The expression is written to the System.err output stream
Parameters:
  level - indentation level for this expression
Parameters:
  out -



getActionExpression
public Expression getActionExpression()(Code)
Get the action expression (the content of the for-each)



getInstructionNameCode
public int getInstructionNameCode()(Code)
Get the name of this instruction for diagnostic and tracing purposes the string "saxon:while"



getItemType
public ItemType getItemType(TypeHierarchy th)(Code)
Get the item type of the items returned by evaluating this instruction the static item type of the instruction
Parameters:
  th -



iterateSubExpressions
public Iterator iterateSubExpressions()(Code)
Get all the XPath expressions associated with this instruction (in XSLT terms, the expression present on attributes of the instruction, as distinct from the child instructions in a sequence construction)



optimize
public Expression optimize(Optimizer opt, StaticContext env, ItemType contextItemType) throws XPathException(Code)



processLeavingTail
public TailCall processLeavingTail(XPathContext context) throws XPathException(Code)



promoteInst
protected void promoteInst(PromotionOffer offer) throws XPathException(Code)
Handle promotion offers, that is, non-local tree rewrites.
Parameters:
  offer - The type of rewrite being offered
throws:
  XPathException -



simplify
public Expression simplify(StaticContext env) throws XPathException(Code)
Simplify an expression. This performs any static optimization (by rewriting the expression as a different expression).
exception:
  XPathException - if an error is discovered during expressionrewriting the simplified expression



typeCheck
public Expression typeCheck(StaticContext env, ItemType contextItemType) throws XPathException(Code)



Methods inherited from net.sf.saxon.instruct.Instruction
public static void appendItem(Item it, SequenceReceiver out, int locationId) throws XPathException(Code)(Java Doc)
protected static ParameterSet assembleParams(XPathContext context, WithParam[] actualParams) throws XPathException(Code)(Java Doc)
protected static ParameterSet assembleTunnelParams(XPathContext context, WithParam[] actualParams) throws XPathException(Code)(Java Doc)
public int computeCardinality()(Code)(Java Doc)
public int computeSpecialProperties()(Code)(Java Doc)
public boolean createsNewNodes()(Code)(Java Doc)
protected static XPathException dynamicError(SourceLocator loc, XPathException error, XPathContext context)(Code)(Java Doc)
final public String evaluateAsString(XPathContext context) throws XPathException(Code)(Java Doc)
public Item evaluateItem(XPathContext context) throws XPathException(Code)(Java Doc)
public int getImplementationMethod()(Code)(Java Doc)
public InstructionInfo getInstructionInfo()(Code)(Java Doc)
public int getInstructionNameCode()(Code)(Java Doc)
public ItemType getItemType(TypeHierarchy th)(Code)(Java Doc)
public SourceLocator getSourceLocator()(Code)(Java Doc)
public boolean isXSLT(XPathContext context)(Code)(Java Doc)
public SequenceIterator iterate(XPathContext context) throws XPathException(Code)(Java Doc)
public void process(XPathContext context) throws XPathException(Code)(Java Doc)
abstract public TailCall processLeavingTail(XPathContext context) throws XPathException(Code)(Java Doc)
public Expression promote(PromotionOffer offer) throws XPathException(Code)(Java Doc)
protected void promoteInst(PromotionOffer offer) throws XPathException(Code)(Java Doc)
abstract public Expression simplify(StaticContext env) 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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