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Java Source Code / Java Documentation » XML » saxonb » 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.UseAttributeSets

UseAttributeSets
public class UseAttributeSets extends Instruction (Code)
This instruction corresponds to a use-attribute-sets attribute on a literal result element, xsl:element, or xsl:copy.



Constructor Summary
public  UseAttributeSets(AttributeSet[] sets)
    

Method Summary
public  voiddisplay(int level, NamePool pool, PrintStream out)
     Diagnostic print of expression structure.
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  TailCallprocessLeavingTail(XPathContext context)
     ProcessLeavingTail: called to do the real work of this instruction.
public  Expressionsimplify(StaticContext env)
     Simplify an expression.
public  ExpressiontypeCheck(StaticContext env, ItemType contextItemType)
     Perform type checking of an expression and its subexpressions.

This checks statically that the operands of the expression have the correct type; if necessary it generates code to do run-time type checking or type conversion.



Constructor Detail
UseAttributeSets
public UseAttributeSets(AttributeSet[] sets)(Code)




Method Detail
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:
  pool - NamePool used to expand any names appearing in the expression
Parameters:
  out - Output destination



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 -



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)



processLeavingTail
public TailCall processLeavingTail(XPathContext context) throws XPathException(Code)
ProcessLeavingTail: called to do the real work of this instruction. This method must be implemented in each subclass. The results of the instruction are written to the current Receiver, which can be obtained via the Controller.
Parameters:
  context - The dynamic context of the transformation, giving access to the current node,the current variables, etc. null if the instruction has completed execution; or a TailCall indicatinga function call or template call that is delegated to the caller, to be made after the stack hasbeen unwound so as to save stack space.



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). The default implementation does nothing. the simplified expression
throws:
  net.sf.saxon.trans.XPathException - if an error is discovered during expressionrewriting



typeCheck
public Expression typeCheck(StaticContext env, ItemType contextItemType) throws XPathException(Code)
Perform type checking of an expression and its subexpressions.

This checks statically that the operands of the expression have the correct type; if necessary it generates code to do run-time type checking or type conversion. A static type error is reported only if execution cannot possibly succeed, that is, if a run-time type error is inevitable. The call may return a modified form of the expression.

This method is called after all references to functions and variables have been resolved to the declaration of the function or variable. However, the types of such functions and variables may not be accurately known if they have not been explicitly declared.


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 to perform necessaryrun-time type checks, and to perform other type-relatedoptimizations
throws:
  net.sf.saxon.trans.StaticError - if an error is discovered during this phase(typically a type error)



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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