net.sf.saxon.instruct
Class Comment

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

All Implemented Interfaces:

Serializable, SourceLocator, Container, EvaluableItem, SequenceIterable, TailCallReturner, InstructionInfoProvider

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.expr.Expression

EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD

Constructor Summary

Comment()
Construct the instruction

Method Summary

void	display(int level, PrintStream out, Configuration config) 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) Method to perform type-checking specific to the kind of instruction
TailCall	processLeavingTail(XPathContext context) Process this instruction, to output a Comment Node

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

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

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

appendItem, evaluateAsString, getImplementationMethod, getInstructionInfo, getSourceLocator, isXSLT, process, promote

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

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

Methods inherited from class java.lang.Object

equals, 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

Overrides:

getItemType in class Instruction

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).

localTypeCheck

public void localTypeCheck(StaticContext env,
                           ItemType contextItemType)
                    throws XPathException

Description copied from class: SimpleNodeConstructor

Method to perform type-checking specific to the kind of instruction

Specified by:

localTypeCheck in class SimpleNodeConstructor

Throws:

XPathException

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

display

public void display(int level,
                    PrintStream out,
                    Configuration config)

Description copied from class: SimpleNodeConstructor

Display this instruction as an expression, for diagnostics

Overrides:

display in class SimpleNodeConstructor

Parameters:

level - indentation level for this expression

out - Output destination