Package net.sf.saxon.expr.instruct
Class Comment
java.lang.Object
net.sf.saxon.expr.Expression
net.sf.saxon.expr.instruct.Instruction
net.sf.saxon.expr.instruct.SimpleNodeConstructor
net.sf.saxon.expr.instruct.Comment
- All Implemented Interfaces:
ExportAgent
,Locatable
,IdentityComparable
,Traceable
An instruction representing an xsl:comment element in the stylesheet.
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Field Summary
Fields inherited from class net.sf.saxon.expr.instruct.SimpleNodeConstructor
selectOp
Fields inherited from class net.sf.saxon.expr.Expression
EFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, ITEM_FEED_METHOD, ITERATE_METHOD, MAX_COST, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, PROCESS_METHOD, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, UPDATE_METHOD, WATCH_METHOD
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptioncheckContent
(UnicodeString comment, XPathContext context) Check the content of the node, and adjust it if necessarystatic UnicodeString
checkContentXQuery
(UnicodeString comment) Check the content of the comment according to the XQuery rules (which throw an error if it is wrong)static UnicodeString
checkContentXSLT
(UnicodeString comment) Check the content of the comment according to the XSLT rules (which fix it if it is wrong)copy
(RebindingMap rebindings) Copy an expression.void
Diagnostic print of expression structure.int
Determine the static cardinality of the expression.Make an elaborator for this expressionint
Get the instruction name, for diagnostics and tracing return the string "xsl:comment"Get the item type of the items returned by evaluating this instructionvoid
localTypeCheck
(ExpressionVisitor visitor, ContextItemStaticInfo contextItemType) Method to perform type-checking specific to the kind of instructionvoid
processValue
(UnicodeString value, Outputter output, XPathContext context) Process the value of the node, to create the new node.Methods inherited from class net.sf.saxon.expr.instruct.SimpleNodeConstructor
allowExtractingCommonSubexpressions, alwaysCreatesNewNodes, computeCardinality, computeSpecialProperties, evaluateItem, evaluateNodeName, getSelect, getSelectOp, getStreamerName, isLocal, iterate, mayCreateNewNodes, operands, optimize, setSelect, typeCheck
Methods inherited from class net.sf.saxon.expr.instruct.Instruction
assembleParams, assembleTunnelParams, dynamicError, evaluateAsString, getExpressionName, getImplementationMethod, getNetCost, getSourceLocator, isInstruction, isXSLT, process, someOperandCreatesNewNodes
Methods inherited from class net.sf.saxon.expr.Expression
addToPathMap, adoptChildExpression, checkedOperands, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeHashCode, computeStaticProperties, dispatchTailCall, dynamicError, effectiveBooleanValue, equals, explain, getConfiguration, getCost, getDependencies, getEvaluationMethod, getExtraProperty, getIntegerBounds, getIntrinsicDependencies, getLocalRetainedStaticContext, getLocation, getObjectName, getPackageData, getParentExpression, getProperties, getProperty, getRetainedStaticContext, getScopingExpression, getSlotsUsed, getSpecialProperties, getStaticBaseURI, getStaticBaseURIString, getStaticType, getStaticUType, getTracingTag, hasCompatibleStaticContext, hashCode, hasSpecialProperty, hasVariableBinding, identityHashCode, implementsStaticTypeCheck, isCallOn, isEqual, isIdentical, isLiftable, isMultiThreaded, isStaticPropertiesKnown, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, makeElaborator, markTailFunctionCalls, operandList, operandSparseList, optimizeChildren, prepareForStreaming, resetLocalStaticProperties, restoreParentPointers, setEvaluationMethod, setExtraProperty, setFiltered, setFlattened, setLocation, setParentExpression, setRetainedStaticContext, setRetainedStaticContextLocally, setRetainedStaticContextThoroughly, setStaticProperty, simplify, simplifyChildren, staticTypeCheck, supportsLazyEvaluation, suppressValidation, toPattern, toShortString, toString, typeCheckChildren, typeError, unordered, verifyParentPointers, withLocation
Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
Methods inherited from interface net.sf.saxon.trace.Traceable
gatherProperties
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Constructor Details
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Comment
public Comment()Construct the instruction
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Method Details
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getInstructionNameCode
public int getInstructionNameCode()Get the instruction name, for diagnostics and tracing return the string "xsl:comment"- Overrides:
getInstructionNameCode
in classInstruction
- Returns:
- a code identifying the instruction: typically but not always the fingerprint of a name in the XSLT namespace
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getItemType
Description copied from class:Instruction
Get the item type of the items returned by evaluating this instruction- Overrides:
getItemType
in classInstruction
- Returns:
- the static item type of the instruction
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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 classExpression
- 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).
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copy
Copy an expression. This makes a deep copy.- Specified by:
copy
in classExpression
- Parameters:
rebindings
- variables to be re-bound- Returns:
- the copy of the original expression
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localTypeCheck
public void localTypeCheck(ExpressionVisitor visitor, ContextItemStaticInfo contextItemType) throws XPathException Description copied from class:SimpleNodeConstructor
Method to perform type-checking specific to the kind of instruction- Specified by:
localTypeCheck
in classSimpleNodeConstructor
- Parameters:
visitor
- an expression visitorcontextItemType
- the static type of the context item- Throws:
XPathException
- if a type error is detected
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processValue
public void processValue(UnicodeString value, Outputter output, XPathContext context) throws XPathException Process the value of the node, to create the new node.- Specified by:
processValue
in classSimpleNodeConstructor
- Parameters:
value
- the string value of the new nodeoutput
- the destination for the resultcontext
- the dynamic evaluation context- Throws:
XPathException
- if a dynamic error occurs
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checkContent
public UnicodeString checkContent(UnicodeString comment, XPathContext context) throws XPathException Check the content of the node, and adjust it if necessary- Overrides:
checkContent
in classSimpleNodeConstructor
- Parameters:
comment
- the supplied contentcontext
- the dynamic context- Returns:
- the original content, unless adjustments are needed
- Throws:
XPathException
- if the content is invalid
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checkContentXSLT
Check the content of the comment according to the XSLT rules (which fix it if it is wrong)- Parameters:
comment
- the proposed text of the comment- Returns:
- the adjusted text of the comment
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checkContentXQuery
Check the content of the comment according to the XQuery rules (which throw an error if it is wrong)- Parameters:
comment
- the proposed text of the comment- Returns:
- the adjusted text of the comment (always the same as the original if there is no error)
- Throws:
XPathException
- if the content is invalid
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export
Diagnostic print of expression structure. The abstract expression tree is written to the supplied output destination.- Specified by:
export
in interfaceExportAgent
- Specified by:
export
in classExpression
- Parameters:
out
- the expression presenter used to display the structure- Throws:
XPathException
- if the export fails, for example if an expression is found that won't work in the target environment.
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getElaborator
Make an elaborator for this expression- Overrides:
getElaborator
in classExpression
- Returns:
- a suitable elaborator
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