Package net.sf.saxon.expr.instruct
Class ProcessingInstruction
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.ProcessingInstruction
- All Implemented Interfaces:
ExportAgent
,Locatable
,IdentityComparable
,Traceable
An xsl:processing-instruction element in the stylesheet, or a processing-instruction
constructor in a query
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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
ConstructorsConstructorDescriptionCreate an xsl:processing-instruction instruction -
Method Summary
Modifier and TypeMethodDescriptioncheckContent
(UnicodeString data, XPathContext context) Check the content of the node, and adjust it if necessarystatic UnicodeString
Check the content of the node, and adjust it if necessary, using the XQuery rulesstatic UnicodeString
Check the content of the node, and adjust it if necessary, using the XSLT rulescheckName
(AtomicValue name, XPathContext context) copy
(RebindingMap rebindings) Copy an expression.evaluateNodeName
(XPathContext context) Run-time method to compute the name of the node being constructed.void
Diagnostic print of expression structure.int
Determine the static cardinality of the expression.int
Determine which aspects of the context the expression depends on.Make an elaborator for this expressionint
Get the name of this instruction for diagnostic and tracing purposesGet 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 instructionoperands()
Get the immediate sub-expressions of this expression, with information about the relationship of each expression to its parent expression.void
processValue
(UnicodeString value, Outputter output, XPathContext context) Process the value of the node, to create the new node.void
setNameExp
(Expression nameExp) Methods inherited from class net.sf.saxon.expr.instruct.SimpleNodeConstructor
allowExtractingCommonSubexpressions, alwaysCreatesNewNodes, computeCardinality, computeSpecialProperties, evaluateItem, getSelect, getSelectOp, getStreamerName, isLocal, iterate, mayCreateNewNodes, 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, 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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ProcessingInstruction
Create an xsl:processing-instruction instruction- Parameters:
name
- the expression used to compute the name of the generated processing-instruction
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Method Details
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getNameExp
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setNameExp
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operands
Description copied from class:Expression
Get the immediate sub-expressions of this expression, with information about the relationship of each expression to its parent expression.If the expression is a Callable, then it is required that the order of the operands returned by this function is the same as the order of arguments supplied to the corresponding call() method.
- Overrides:
operands
in classSimpleNodeConstructor
- Returns:
- an iterator containing the sub-expressions of this expression
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getInstructionNameCode
public int getInstructionNameCode()Get the name of this instruction for diagnostic and tracing purposes- Overrides:
getInstructionNameCode
in classInstruction
- Returns:
- the string "xsl:processing-instruction"
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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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getDependencies
public int getDependencies()Description copied from class:Expression
Determine which aspects of the context the expression depends on. The result is a bitwise-or'ed value composed from constants such as XPathContext.VARIABLES and XPathContext.CURRENT_NODE. The default implementation combines the intrinsic dependencies of this expression with the dependencies of the subexpressions, computed recursively. This is overridden for expressions such as FilterExpression where a subexpression's dependencies are not necessarily inherited by the parent expression.- Overrides:
getDependencies
in classExpression
- Returns:
- a set of bit-significant flags identifying the dependencies of the expression
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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 things go wrong
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checkContent
Check the content of the node, and adjust it if necessary- Overrides:
checkContent
in classSimpleNodeConstructor
- Parameters:
data
- 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 node, and adjust it if necessary, using the XSLT rules- Parameters:
data
- the supplied content- Returns:
- the original content, unless adjustments are needed
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checkContentXQuery
Check the content of the node, and adjust it if necessary, using the XQuery rules- Parameters:
data
- the supplied content- Returns:
- the original content, unless adjustments are needed
- Throws:
XPathException
- if the content is invalid
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evaluateNodeName
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:
evaluateNodeName
in classSimpleNodeConstructor
- 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
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checkName
- Throws:
XPathException
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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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