net.sf.saxon.instruct
Class Comment

java.lang.Object
  net.sf.saxon.expr.ComputedExpression
      net.sf.saxon.instruct.Instruction
          net.sf.saxon.instruct.SimpleNodeConstructor
              net.sf.saxon.instruct.Comment

All Implemented Interfaces:

Container, Expression, InstructionInfoProvider, java.io.Serializable, javax.xml.transform.SourceLocator, TailCallReturner

public final class Comment

extends SimpleNodeConstructor

An instruction representing an xsl:comment element in the stylesheet.

See Also:

Serialized Form

Field Summary

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

select

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

locationId, staticProperties

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

EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD

Constructor Summary

Comment()
Construct the instruction

Method Summary

protected java.lang.String	checkContent(java.lang.String comment, XPathContext context) Check the content of the node, and adjust it if necessary
void	display(int level, NamePool pool, java.io.PrintStream out) Display this instruction as an expression, for diagnostics
int	getCardinality() Determine the static cardinality of the expression.
int	getInstructionNameCode() Get the instruction name, for diagnostics and tracing return the string "xsl:comment"
ItemType	getItemType(TypeHierarchy th) Get the item type of the items returned by evaluating this instruction
void	localTypeCheck(StaticContext env, ItemType contextItemType)
TailCall	processLeavingTail(XPathContext context) Process this instruction, to output a Comment Node

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

computeSpecialProperties, createsNewNodes, evaluateItem, evaluateNameCode, expandChildren, getSelect, iterate, iterateSubExpressions, optimize, promoteInst, setSelect, simplify, typeCheck

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

appendItem, assembleParams, assembleTunnelParams, computeCardinality, dynamicError, evaluateAsString, getImplementationMethod, getInstructionInfo, getSourceLocator, isXSLT, process, promote

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

adoptChildExpression, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, dynamicError, effectiveBooleanValue, getColumnNumber, getConstructType, getDependencies, getExecutable, getHostLanguage, getIntrinsicDependencies, getLineNumber, getLocationId, getLocationProvider, getParentExpression, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, hasBadParentPointer, markTailFunctionCalls, resetStaticProperties, setLocationId, setParentExpression, suppressValidation, typeError, typeError

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface javax.xml.transform.SourceLocator

getColumnNumber, getLineNumber, getPublicId, getSystemId

Constructor Detail

Comment

public Comment()

Construct the instruction

Method Detail

getInstructionNameCode

public int getInstructionNameCode()

Get the instruction name, for diagnostics and tracing return the string "xsl:comment"

Overrides:

getInstructionNameCode in class Instruction

getItemType

public ItemType getItemType(TypeHierarchy th)

Description copied from class: Instruction

Get the item type of the items returned by evaluating this instruction

Specified by:

getItemType in interface Expression

Overrides:

getItemType in class Instruction

Parameters:

th -

Returns:

the static item type of the instruction

getCardinality

public int getCardinality()

Description copied from class: ComputedExpression

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.

Specified by:

getCardinality in interface Expression

Overrides:

getCardinality in class ComputedExpression

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).

localTypeCheck

public void localTypeCheck(StaticContext env,
                           ItemType contextItemType)

Specified by:

localTypeCheck in class SimpleNodeConstructor

processLeavingTail

public TailCall processLeavingTail(XPathContext context)
                            throws XPathException

Process this instruction, to output a Comment Node

Specified by:

processLeavingTail in interface TailCallReturner

Specified by:

processLeavingTail in class Instruction

Parameters:

context - the dynamic context for this transformation

Returns:

a TailCall representing a call delegated to the caller. Always returns null in this implementation

Throws:

XPathException

checkContent

protected java.lang.String checkContent(java.lang.String comment,
                                        XPathContext context)
                                 throws DynamicError

Check the content of the node, and adjust it if necessary

Overrides:

checkContent in class SimpleNodeConstructor

Parameters:

comment - the supplied content

context - the dynamic context

Returns:

the original content, unless adjustments are needed

Throws:

DynamicError - if the content is invalid

display

public void display(int level,
                    NamePool pool,
                    java.io.PrintStream out)

Description copied from class: SimpleNodeConstructor

Display this instruction as an expression, for diagnostics

Specified by:

display in interface Expression

Overrides:

display in class SimpleNodeConstructor