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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.Block

Block
public class Block extends Instruction (Code)
Implements an imaginary xsl:block instruction which simply evaluates its contents. Used for top-level templates, xsl:otherwise, etc.



Constructor Summary
public  Block()
    

Method Summary
public  voidcheckPermittedContents(SchemaType parentType, StaticContext env, boolean whole)
     Check that any elements and attributes constructed or returned by this expression are acceptable in the content model of a given complex type.
final public  booleancreatesNewNodes()
     Determine whether this instruction creates new nodes.
public  voiddisplay(int level, NamePool pool, PrintStream out)
     Diagnostic print of expression structure.
public static  voiddisplayChildren(Expression[] children, int level, NamePool pool, PrintStream out)
    
final public  intgetCardinality()
    
public  Expression[]getChildren()
     Get the children of this instruction the children of this instruction, as an array of Instruction objects.
public  intgetImplementationMethod()
     An implementation of Expression must provide at least one of the methods evaluateItem(), iterate(), or process(). This method indicates which of these methods is provided.
final public  ItemTypegetItemType(TypeHierarchy th)
    
public  SequenceIteratoriterate(XPathContext context)
    
public  IteratoriterateSubExpressions()
    
public static  ExpressionmakeBlock(Expression e1, Expression e2)
    
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  voidsetChildren(Expression[] children)
    
public  Expressionsimplify(StaticContext env)
     Simplify an expression.
public  ExpressiontypeCheck(StaticContext env, ItemType contextItemType)
    


Constructor Detail
Block
public Block()(Code)




Method Detail
checkPermittedContents
public void checkPermittedContents(SchemaType parentType, StaticContext env, boolean whole) throws XPathException(Code)
Check that any elements and attributes constructed or returned by this expression are acceptable in the content model of a given complex type. It's always OK to say yes, since the check will be repeated at run-time. The process of checking element and attribute constructors against the content model of a complex type also registers the type of content expected of those constructors, so the static validation can continue recursively.



createsNewNodes
final public boolean createsNewNodes()(Code)
Determine whether this instruction creates new nodes. This implementation returns true if any child instruction returns true.



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 -



displayChildren
public static void displayChildren(Expression[] children, int level, NamePool pool, PrintStream out)(Code)
Display the children of an instruction for diagostics



getCardinality
final public int getCardinality()(Code)
Determine the cardinality of the expression



getChildren
public Expression[] getChildren()(Code)
Get the children of this instruction the children of this instruction, as an array of Instruction objects. May return eithera zero-length array or null if there are no children



getImplementationMethod
public int getImplementationMethod()(Code)
An implementation of Expression must provide at least one of the methods evaluateItem(), iterate(), or process(). This method indicates which of these methods is provided. This implementation provides both iterate() and process() methods natively.



getItemType
final public ItemType getItemType(TypeHierarchy th)(Code)
Determine the data type of the items returned by this expression the data type
Parameters:
  th -



iterate
public SequenceIterator iterate(XPathContext context) throws XPathException(Code)
Iterate over the results of all the child expressions



iterateSubExpressions
public Iterator iterateSubExpressions()(Code)



makeBlock
public static Expression makeBlock(Expression e1, Expression e2)(Code)



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 -



setChildren
public void setChildren(Expression[] children)(Code)
Set the children of this instruction
Parameters:
  children - The instructions that are children of this instruction



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.
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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