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Java Source Code / Java Documentation » XML » saxonb » net.sf.saxon.expr 
Source Cross Reference  Class Diagram Java Document (Java Doc) 


java.lang.Object
   net.sf.saxon.expr.ComputedExpression
      net.sf.saxon.expr.UnaryExpression
         net.sf.saxon.expr.Atomizer

Atomizer
final public class Atomizer extends UnaryExpression (Code)
An Atomizer is an expression corresponding essentially to the fn:data() function: it maps a sequence by replacing nodes with their typed values

Inner Class :public static class AtomizingFunction implements MappingFunction


Constructor Summary
public  Atomizer(Expression sequence, Configuration config)
     Constructor
Parameters:
  sequence - the sequence to be atomized
Parameters:
  config - the Configuration.

Method Summary
public  intcomputeCardinality()
    
public  intcomputeSpecialProperties()
    
protected  StringdisplayOperator(NamePool pool)
    
public  ItemevaluateItem(XPathContext context)
     Evaluate as an Item.
final public static  ItemTypegetAtomizedItemType(Expression operand, boolean alwaysUntyped, TypeHierarchy th)
    
public  ItemTypegetItemType(TypeHierarchy th)
     Determine the data type of the items returned by the expression, if possible a value such as Type.STRING, Type.BOOLEAN, Type.NUMBER.
public  SequenceIteratoriterate(XPathContext context)
    
public  Expressionsimplify(StaticContext env)
    
public  ExpressiontypeCheck(StaticContext env, ItemType contextItemType)
    


Constructor Detail
Atomizer
public Atomizer(Expression sequence, Configuration config)(Code)
Constructor
Parameters:
  sequence - the sequence to be atomized
Parameters:
  config - the Configuration. Used only for optimization, may be null. Atomization is faster ifit is known in advance that all nodes will be untyped.




Method Detail
computeCardinality
public int computeCardinality()(Code)
Determine the static cardinality of the expression



computeSpecialProperties
public int computeSpecialProperties()(Code)
Determine the special properties of this expression StaticProperty.NON_CREATIVE.



displayOperator
protected String displayOperator(NamePool pool)(Code)
Give a string representation of the operator for use in diagnostics the operator, as a string



evaluateItem
public Item evaluateItem(XPathContext context) throws XPathException(Code)
Evaluate as an Item. This should only be called if the Atomizer has cardinality zero-or-one, which will only be the case if the underlying expression has cardinality zero-or-one.



getAtomizedItemType
final public static ItemType getAtomizedItemType(Expression operand, boolean alwaysUntyped, TypeHierarchy th)(Code)
Compute the type that will result from atomizing the result of a given expression
Parameters:
  operand - the given expression
Parameters:
  alwaysUntyped - true if it is known that nodes will always be untyped the item type of the result of evaluating the operand expression, after atomization



getItemType
public ItemType getItemType(TypeHierarchy th)(Code)
Determine the data type of the items returned by the expression, if possible a value such as Type.STRING, Type.BOOLEAN, Type.NUMBER. For this class, theresult is always an atomic type, but it might be more specific.
Parameters:
  th -



iterate
public SequenceIterator iterate(XPathContext context) throws XPathException(Code)
Iterate over the sequence of values



simplify
public Expression simplify(StaticContext env) throws XPathException(Code)
Simplify an expression



typeCheck
public Expression typeCheck(StaticContext env, ItemType contextItemType) throws XPathException(Code)
Type-check the expression



Fields inherited from net.sf.saxon.expr.UnaryExpression
protected Expression operand(Code)(Java Doc)

Methods inherited from net.sf.saxon.expr.UnaryExpression
public int computeCardinality()(Code)(Java Doc)
public int computeSpecialProperties()(Code)(Java Doc)
public void display(int level, NamePool pool, PrintStream out)(Code)(Java Doc)
abstract protected String displayOperator(NamePool pool)(Code)(Java Doc)
public boolean equals(Object other)(Code)(Java Doc)
public Expression getBaseExpression()(Code)(Java Doc)
public ItemType getItemType(TypeHierarchy th)(Code)(Java Doc)
public int hashCode()(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 promote(PromotionOffer offer) throws XPathException(Code)(Java Doc)
public Expression simplify(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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