Namespace

java.lang.Object
- net.sf.saxon.expr.Expression
- - net.sf.saxon.instruct.Instruction
  - - net.sf.saxon.instruct.SimpleNodeConstructor
    - - net.sf.saxon.instruct.Namespace

All Implemented Interfaces:

java.io.Serializable, javax.xml.transform.SourceLocator, LocationProvider, SaxonLocator, EvaluableItem, SequenceIterable, TailCallReturner, InstructionInfo, org.xml.sax.Locator
```
public class Namespace
extends SimpleNodeConstructor
```
An xsl:namespace element in the stylesheet. (XSLT 2.0)

See Also:

Serialized Form

Field Summary
- Fields inherited from class net.sf.saxon.expr.Expression
  EVALUATE_METHOD, ITERATE_METHOD, locationId, PROCESS_METHOD, staticProperties
- Fields inherited from class net.sf.saxon.instruct.SimpleNodeConstructor
  select

Constructor Summary

Constructors
Constructor Description

Namespace(Expression name)
Create an xsl:namespace instruction for dynamic construction of namespace nodes

Constructors
Constructor	Description
`Namespace(Expression name)`	Create an xsl:namespace instruction for dynamic construction of namespace nodes

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Expression`	`copy()`	Copy an expression.
`Item`	`evaluateItem(XPathContext context)`	Evaluate as an expression.
`int`	`evaluateNameCode(XPathContext context)`	Run-time method to compute the name of the node being constructed.
`void`	`explain(ExpressionPresenter out)`	Diagnostic print of expression structure.
`int`	`getCardinality()`	Determine the static cardinality of the expression.
`int`	`getInstructionNameCode()`	Set the name of this instruction for diagnostic and tracing purposes
`ItemType`	`getItemType(TypeHierarchy th)`	Get the item type of the items returned by evaluating this instruction
`java.util.Iterator`	`iterateSubExpressions()`	Get the immediate sub-expressions of this expression.
`void`	`localTypeCheck(ExpressionVisitor visitor, ItemType contextItemType)`	Method to perform type-checking specific to the kind of instruction
`TailCall`	`processLeavingTail(XPathContext context)`	ProcessLeavingTail: called to do the real work of this instruction.
`protected void`	`promoteInst(PromotionOffer offer)`	Offer promotion for subexpressions.
`boolean`	`replaceSubExpression(Expression original, Expression replacement)`	Replace one subexpression by a replacement subexpression
`Expression`	`simplify(ExpressionVisitor visitor)`	Simplify an expression.

Methods inherited from class net.sf.saxon.expr.Expression
addToPathMap, adoptChildExpression, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeStaticProperties, display, doPromotion, dynamicError, effectiveBooleanValue, evaluatePendingUpdates, explain, findParentOf, getColumnNumber, getColumnNumber, getContainer, getDependencies, getExecutable, getHostLanguage, getIntrinsicDependencies, getLineNumber, getLineNumber, getLocationId, getLocationProvider, getObjectName, getProperties, getProperty, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, getSystemId, hasLoopingSubexpression, implementsStaticTypeCheck, isUpdatingExpression, iterateEvents, markTailFunctionCalls, resetLocalStaticProperties, setContainer, setFiltered, setFlattened, setLocationId, staticTypeCheck, suppressValidation, toString, typeError

Methods inherited from class net.sf.saxon.instruct.Instruction
assembleParams, assembleTunnelParams, dynamicError, evaluateAsString, getConstructType, getImplementationMethod, getSourceLocator, isXSLT, process, promote

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from class net.sf.saxon.instruct.SimpleNodeConstructor
checkContent, computeCardinality, computeSpecialProperties, createsNewNodes, expandChildren, getSelect, iterate, optimize, setSelect, typeCheck

Methods inherited from interface javax.xml.transform.SourceLocator
getColumnNumber, getLineNumber, getPublicId, getSystemId

- Constructor Detail
  - Namespace
```
public Namespace(Expression name)
```
    Create an xsl:namespace instruction for dynamic construction of namespace nodes
    
    Parameters:
    
    name - the expression to evaluate the name of the node (that is, the prefix)
- Method Detail
  - getInstructionNameCode
```
public int getInstructionNameCode()
```
    Set the name of this instruction for diagnostic and tracing purposes
    
    Overrides:
    
    getInstructionNameCode in class Instruction
    
    Returns:
    
    a code identifying the instruction: typically but not always the fingerprint of a name in the XSLT namespace
  - simplify
```
public Expression simplify(ExpressionVisitor visitor)
                    throws XPathException
```
    Description copied from class: Instruction
    
    Simplify an expression. This performs any static optimization (by rewriting the expression as a different expression). The default implementation does nothing.
    
    Overrides:
    
    simplify in class SimpleNodeConstructor
    
    Parameters:
    
    visitor - an expression visitor
    
    Returns:
    
    the simplified expression
    
    Throws:
    
    XPathException - if an error is discovered during expression rewriting
  - getItemType
```
public ItemType getItemType(TypeHierarchy th)
```
    Description copied from class: Instruction
    
    Get the item type of the items returned by evaluating this instruction
    
    Overrides:
    
    getItemType in class Instruction
    
    Parameters:
    
    th - the type hierarchy cache
    
    Returns:
    
    the static item type of the instruction
  - getCardinality
```
public int getCardinality()
```
    Description copied from class: Expression
    
    Determine the static cardinality of the expression. This establishes how many items there will be in the result of the expression, at compile time (i.e., without actually evaluating the result.
    
    Overrides:
    
    getCardinality in class Expression
    
    Returns:
    
    one of the values Cardinality.ONE_OR_MORE, Cardinality.ZERO_OR_MORE, Cardinality.EXACTLY_ONE, Cardinality.ZERO_OR_ONE, Cardinality.EMPTY. This default implementation returns ZERO_OR_MORE (which effectively gives no information).
  - promoteInst
```
protected void promoteInst(PromotionOffer offer)
                    throws XPathException
```
    Description copied from class: SimpleNodeConstructor
    
    Offer promotion for subexpressions. The offer will be accepted if the subexpression is not dependent on the factors (e.g. the context item) identified in the PromotionOffer. By default the offer is not accepted - this is appropriate in the case of simple expressions such as constant values and variable references where promotion would give no performance advantage. This method is always called at compile time.
    
    Overrides:
    
    promoteInst in class SimpleNodeConstructor
    
    Parameters:
    
    offer - details of the offer, for example the offer to move expressions that don't depend on the context to an outer level in the containing expression
    
    Throws:
    
    XPathException - if any error is detected
  - localTypeCheck
```
public void localTypeCheck(ExpressionVisitor visitor,
                           ItemType contextItemType)
```
    Description copied from class: SimpleNodeConstructor
    
    Method to perform type-checking specific to the kind of instruction
    
    Specified by:
    
    localTypeCheck in class SimpleNodeConstructor
    
    Parameters:
    
    visitor - an expression visitor
    
    contextItemType - the static type of the context item
  - iterateSubExpressions
```
public java.util.Iterator iterateSubExpressions()
```
    Description copied from class: Expression
    
    Get the immediate sub-expressions of this expression. Default implementation returns a zero-length array, appropriate for an expression that has no sub-expressions.
    
    Overrides:
    
    iterateSubExpressions in class SimpleNodeConstructor
    
    Returns:
    
    an iterator containing the sub-expressions of this expression
  - copy
```
public Expression copy()
```
    Copy an expression. This makes a deep copy.
    
    Specified by:
    
    copy in class Expression
    
    Returns:
    
    the copy of the original expression
  - replaceSubExpression
```
public boolean replaceSubExpression(Expression original,
                                    Expression replacement)
```
    Replace one subexpression by a replacement subexpression
    
    Overrides:
    
    replaceSubExpression in class SimpleNodeConstructor
    
    Parameters:
    
    original - the original subexpression
    
    replacement - the replacement subexpression
    
    Returns:
    
    true if the original subexpression is found
  - evaluateNameCode
```
public int evaluateNameCode(XPathContext context)
                     throws XPathException
```
    Description copied from class: SimpleNodeConstructor
    
    Run-time method to compute the name of the node being constructed. This is overridden for nodes that have a name. The default implementation returns -1, which is suitable for unnamed nodes such as comments
    
    Overrides:
    
    evaluateNameCode in class SimpleNodeConstructor
    
    Parameters:
    
    context - the XPath dynamic evaluation context
    
    Returns:
    
    the name pool nameCode identifying the name of the constructed node
    
    Throws:
    
    XPathException - if any failure occurs
  - processLeavingTail
```
public TailCall processLeavingTail(XPathContext context)
                            throws XPathException
```
    Description copied from class: Instruction
    
    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.
    
    Specified by:
    
    processLeavingTail in interface TailCallReturner
    
    Specified by:
    
    processLeavingTail in class Instruction
    
    Parameters:
    
    context - The dynamic context of the transformation, giving access to the current node, the current variables, etc.
    
    Returns:
    
    null if the instruction has completed execution; or a TailCall indicating a function call or template call that is delegated to the caller, to be made after the stack has been unwound so as to save stack space.
    
    Throws:
    
    XPathException
  - evaluateItem
```
public Item evaluateItem(XPathContext context)
                  throws XPathException
```
    Evaluate as an expression. We rely on the fact that when these instructions are generated by XQuery, there will always be a valueExpression to evaluate the content
    
    Specified by:
    
    evaluateItem in interface EvaluableItem
    
    Overrides:
    
    evaluateItem in class SimpleNodeConstructor
    
    Parameters:
    
    context - The context in which the expression is to be evaluated
    
    Returns:
    
    the node or atomic value that results from evaluating the expression; or null to indicate that the result is an empty sequence
    
    Throws:
    
    XPathException - if any dynamic error occurs evaluating the expression
  - explain
```
public void explain(ExpressionPresenter out)
```
    Diagnostic print of expression structure. The abstract expression tree is written to the supplied output destination.
    
    Specified by:
    
    explain in class Expression
    
    Parameters:
    
    out - the expression presenter used to display the structure

Class Namespace

Field Summary

Fields inherited from class net.sf.saxon.expr.Expression

Fields inherited from class net.sf.saxon.instruct.SimpleNodeConstructor

Constructor Summary

Method Summary

Methods inherited from class net.sf.saxon.expr.Expression

Methods inherited from class net.sf.saxon.instruct.Instruction

Methods inherited from class java.lang.Object

Methods inherited from class net.sf.saxon.instruct.SimpleNodeConstructor

Methods inherited from interface javax.xml.transform.SourceLocator

Constructor Detail

Namespace

Method Detail

getInstructionNameCode

simplify

getItemType

getCardinality

promoteInst

localTypeCheck

iterateSubExpressions

copy

replaceSubExpression

evaluateNameCode

processLeavingTail

evaluateItem

explain