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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.ValueOf
public final class ValueOf
An xsl:value-of element in the stylesheet.
The xsl:value-of element takes attributes:
Field Summary |
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Fields inherited from class net.sf.saxon.expr.instruct.SimpleNodeConstructor |
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select |
Fields inherited from class net.sf.saxon.expr.Expression |
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EFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, EVENT_FEED_METHOD, ITEM_FEED_METHOD, ITERATE_METHOD, locationId, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, PROCESS_METHOD, PUSH_SELECTION, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, WATCH_METHOD |
Constructor Summary | |
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ValueOf(Expression select,
boolean disable,
boolean noNodeIfEmpty)
Create a new ValueOf expression |
Method Summary | |
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void |
checkPermittedContents(SchemaType parentType,
StaticContext env,
boolean whole)
Check statically that the results of the expression are capable of constructing the content of a given schema type. |
int |
computeCardinality()
Get the cardinality of the sequence returned by evaluating this instruction |
Expression |
convertToCastAsString()
Convert this value-of instruction to an expression that delivers the string-value of the resulting text node as an untyped atomic value. |
Expression |
copy()
Copy an expression. |
NodeInfo |
evaluateItem(XPathContext context)
Evaluate this expression, returning the resulting text node to the caller |
void |
explain(ExpressionPresenter out)
Diagnostic print of expression structure. |
int |
getInstructionNameCode()
Get 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 |
int |
getOptions()
Test for any special options such as disable-output-escaping |
boolean |
isDisableOutputEscaping()
Test whether disable-output-escaping was requested |
boolean |
isNoNodeIfEmpty()
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boolean |
isNumberingInstruction()
Determine whether this is really an xsl:number instruction |
void |
localTypeCheck(ExpressionVisitor visitor,
ExpressionVisitor.ContextItemType contextItemType)
Method to perform type-checking specific to the kind of instruction |
TailCall |
processLeavingTail(XPathContext context)
Process this instruction |
void |
processValue(CharSequence value,
XPathContext context)
Process the value of the node, to create the new node. |
void |
setIsNumberingInstruction()
Indicate that this is really an xsl:nunber instruction |
Methods inherited from class net.sf.saxon.expr.instruct.SimpleNodeConstructor |
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checkContent, computeSpecialProperties, createsNewNodes, evaluateNodeName, getContentExpression, iterate, iterateSubExpressions, optimize, promoteInst, replaceSubExpression, setSelect, simplify, typeCheck |
Methods inherited from class net.sf.saxon.expr.instruct.Instruction |
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assembleParams, assembleTunnelParams, dynamicError, evaluateAsString, getConstructType, getExpressionName, getImplementationMethod, getInstructionName, getIteratorFromProcessMethod, getSourceLocator, isXSLT, process, promote |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Methods inherited from interface javax.xml.transform.SourceLocator |
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getColumnNumber, getLineNumber, getPublicId, getSystemId |
Constructor Detail |
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public ValueOf(Expression select, boolean disable, boolean noNodeIfEmpty)
select
- the select expressiondisable
- true if disable-output-escaping is in forcenoNodeIfEmpty
- true if the instruction is to return () if the select expression is (),
false if it is to return an empty text nodeMethod Detail |
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public void setIsNumberingInstruction()
public boolean isNumberingInstruction()
public boolean isNoNodeIfEmpty()
public int getInstructionNameCode()
getInstructionNameCode
in class Instruction
public int getOptions()
public boolean isDisableOutputEscaping()
public ItemType getItemType(TypeHierarchy th)
Instruction
getItemType
in class Instruction
th
- the type hierarchy cache
public int computeCardinality()
SimpleNodeConstructor
computeCardinality
in class SimpleNodeConstructor
public void localTypeCheck(ExpressionVisitor visitor, ExpressionVisitor.ContextItemType contextItemType)
SimpleNodeConstructor
localTypeCheck
in class SimpleNodeConstructor
visitor
- an expression visitorcontextItemType
- the static type of the context itempublic Expression copy()
copy
in class Expression
public void checkPermittedContents(SchemaType parentType, StaticContext env, boolean whole) throws XPathException
checkPermittedContents
in class Expression
parentType
- The schema typeenv
- the static contextwhole
- true if this expression is to account for the whole value of the type
XPathException
- if the expression doesn't match the required content typepublic Expression convertToCastAsString()
public TailCall processLeavingTail(XPathContext context) throws XPathException
processLeavingTail
in interface TailCallReturner
processLeavingTail
in class SimpleNodeConstructor
context
- the dynamic context of the transformation
XPathException
- if a dynamic error occurs during the evaluation
of the instructionpublic void processValue(CharSequence value, XPathContext context) throws XPathException
processValue
in class SimpleNodeConstructor
value
- the string value of the new nodecontext
- the dynamic evaluation context
XPathException
public NodeInfo evaluateItem(XPathContext context) throws XPathException
evaluateItem
in class SimpleNodeConstructor
context
- the dynamic evaluation context
XPathException
public void explain(ExpressionPresenter out)
explain
in class Expression
out
- the expression presenter used to display the structure
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