public class DocumentInstr extends ParentNodeConstructor
Conceptually it represents an XSLT instruction xsl:document-node, with no attributes, whose content is a complex content constructor for the children of the document node.
content, validation
locationId, staticProperties
EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD
Constructor and Description |
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DocumentInstr(boolean textOnly,
String constantText,
String baseURI) |
Modifier and Type | Method and Description |
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void |
display(int level,
NamePool pool,
PrintStream out)
Display this instruction as an expression, for diagnostics
|
Item |
evaluateItem(XPathContext context)
Evaluate as an expression.
|
int |
getImplementationMethod()
An implementation of Expression must provide at least one of the methods evaluateItem(), iterate(), or process().
|
int |
getInstructionNameCode()
Get the name of this instruction for diagnostic and tracing purposes
(the string "document-constructor")
|
ItemType |
getItemType(TypeHierarchy th)
Get the item type of the items returned by evaluating this instruction
|
TailCall |
processLeavingTail(XPathContext context)
ProcessLeavingTail: called to do the real work of this instruction.
|
void |
setValidationAction(int action)
Set the validation action
|
Expression |
simplify(StaticContext env)
Simplify an expression.
|
Expression |
typeCheck(StaticContext env,
ItemType contextItemType)
Perform type checking of an expression and its subexpressions.
|
createsNewNodes, getCardinality, getContentExpression, getSchemaType, getValidationAction, isLazyConstruction, isNamespaceSensitive, iterateSubExpressions, optimize, promoteInst, setContentExpression, setLazyConstruction, setSchemaType, verifyLazyConstruction
appendItem, assembleParams, assembleTunnelParams, computeCardinality, computeSpecialProperties, dynamicError, evaluateAsString, getInstructionInfo, getSourceLocator, isXSLT, iterate, process, promote
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
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
getColumnNumber, getLineNumber, getPublicId, getSystemId
public int getImplementationMethod()
getImplementationMethod
in interface Expression
getImplementationMethod
in class Instruction
public void setValidationAction(int action)
public Expression simplify(StaticContext env) throws XPathException
simplify
in interface Expression
simplify
in class ParentNodeConstructor
XPathException
- if an error is discovered during expression rewritingpublic Expression typeCheck(StaticContext env, ItemType contextItemType) throws XPathException
Expression
This checks statically that the operands of the expression have the correct type; if necessary it generates code to do run-time type checking or type conversion. A static type error is reported only if execution cannot possibly succeed, that is, if a run-time type error is inevitable. The call may return a modified form of the expression.
This method is called after all references to functions and variables have been resolved to the declaration of the function or variable. However, the types of such functions and variables may not be accurately known if they have not been explicitly declared.
typeCheck
in interface Expression
typeCheck
in class ParentNodeConstructor
env
- the static context of the expressioncontextItemType
- the static type of "." at the point where this expression is invoked.
The parameter is set to null if it is known statically that the context item will be undefined.
If the type of the context item is not known statically, the argument is set to
Type.ITEM_TYPE
StaticError
- if an error is discovered during this phase
(typically a type error)XPathException
public ItemType getItemType(TypeHierarchy th)
Instruction
getItemType
in interface Expression
getItemType
in class Instruction
public TailCall processLeavingTail(XPathContext context) throws XPathException
Instruction
processLeavingTail
in interface TailCallReturner
processLeavingTail
in class Instruction
context
- The dynamic context of the transformation, giving access to the current node,
the current variables, etc.XPathException
public Item evaluateItem(XPathContext context) throws XPathException
evaluateItem
in interface Expression
evaluateItem
in class Instruction
context
- The context in which the expression is to be evaluatedXPathException
- if any dynamic error occurs evaluating the
expressionpublic int getInstructionNameCode()
getInstructionNameCode
in class Instruction
public void display(int level, NamePool pool, PrintStream out)
level
- indentation level for this expressionpool
- NamePool used to expand any names appearing in the expressionout
- Output destination