public abstract class ParentNodeConstructor extends Instruction implements ValidatingInstruction, InstructionWithComplexContent
Modifier and Type | Field and Description |
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protected Operand |
contentOp |
protected boolean |
preservingTypes
Flag set to true if validation=preserve and no schema type supplied for validation; also true
when validation="strip" if there is no need to physically strip type annotations
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EFFECTIVE_BOOLEAN_VALUE, EVALUATE_METHOD, ITEM_FEED_METHOD, ITERATE_METHOD, MAX_SEQUENCE_LENGTH, MAX_STRING_LENGTH, PROCESS_METHOD, staticProperties, UNBOUNDED_LOWER, UNBOUNDED_UPPER, UPDATE_METHOD, WATCH_METHOD
Constructor and Description |
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ParentNodeConstructor()
Create a document or element node constructor instruction
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Modifier and Type | Method and Description |
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PathMap.PathMapNodeSet |
addToPathMap(PathMap pathMap,
PathMap.PathMapNodeSet pathMapNodeSet)
Add a representation of this expression to a PathMap.
|
boolean |
allowExtractingCommonSubexpressions()
Ask whether common subexpressions found in the operands of this expression can
be extracted and evaluated outside the expression itself.
|
boolean |
alwaysCreatesNewNodes()
Ask whether it is guaranteed that every item in the result of this instruction
is a newly created node
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protected abstract void |
checkContentSequence(StaticContext env)
Check that the child instructions don't violate any obvious constraints for this kind of node
|
int |
computeCardinality()
Get the cardinality of the sequence returned by evaluating this instruction
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int |
getCardinality()
Determine the static cardinality of the expression.
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Expression |
getContentExpression()
Get the expression that constructs the content of the element
|
Operand |
getContentOperand() |
SchemaType |
getSchemaType()
Get the schema type chosen for validation; null if not defined
|
int |
getValidationAction()
Get the validation mode for this instruction
|
ParseOptions |
getValidationOptions()
Get the validation options
|
boolean |
isLazyConstruction()
Establish whether lazy construction is to be used
|
boolean |
isLocal() |
boolean |
isPreservingTypes()
Determine whether this elementCreator performs validation or strips type annotations
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boolean |
mayCreateNewNodes()
Determine whether this instruction creates new nodes.
|
Expression |
optimize(ExpressionVisitor visitor,
ContextItemStaticInfo contextItemType)
Perform optimisation of an expression and its subexpressions.
|
void |
setBaseURI(java.lang.String uri)
Set the static base URI of the instruction
|
void |
setContentExpression(Expression content)
Set the expression that constructs the content of the element
|
void |
setLazyConstruction(boolean lazy)
Indicate that lazy construction should (or should not) be used.
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void |
setNoNeedToStrip()
Set that the newly constructed node and everything underneath it will automatically be untyped,
without any need to physically remove type annotations, even though validation=STRIP is set.
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void |
setValidationAction(int mode,
SchemaType schemaType)
Set the validation mode for the new document or element node
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Expression |
typeCheck(ExpressionVisitor visitor,
ContextItemStaticInfo contextInfo)
Perform type checking of an expression and its subexpressions.
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assembleParams, assembleTunnelParams, computeSpecialProperties, dynamicError, evaluateAsString, evaluateItem, getConstructType, getExpressionName, getImplementationMethod, getInstructionName, getInstructionNameCode, getItemType, getNetCost, getSourceLocator, isInstruction, isXSLT, iterate, operands, process, processLeavingTail, someOperandCreatesNewNodes
adoptChildExpression, checkedOperands, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeHashCode, computeStaticProperties, copy, dynamicError, effectiveBooleanValue, evaluatePendingUpdates, explain, export, getConfiguration, getCost, getDependencies, getEvaluationMethod, getExtraProperty, getIntegerBounds, getInterpretedExpression, getIntrinsicDependencies, getLocalRetainedStaticContext, getLocation, getObjectName, getPackageData, getParentExpression, getProperties, getProperty, getRetainedStaticContext, getScopingExpression, getSlotsUsed, getSpecialProperties, getStaticBaseURI, getStaticBaseURIString, getStaticType, getStaticUType, getStreamerName, hasCompatibleStaticContext, hashCode, hasVariableBinding, identityHashCode, implementsStaticTypeCheck, isCallOn, isCallOnSystemFunction, isIdentical, isLiftable, isMultiThreaded, isSameExpression, isStaticPropertiesKnown, isSubtreeExpression, isUpdatingExpression, isVacuousExpression, markTailFunctionCalls, operandList, operandSparseList, optimizeChildren, resetLocalStaticProperties, restoreParentPointers, setEvaluationMethod, setExtraProperty, setFiltered, setFlattened, setLocation, setParentExpression, setRetainedStaticContext, setRetainedStaticContextLocally, setRetainedStaticContextThoroughly, setStaticProperty, simplify, simplifyChildren, staticTypeCheck, suppressValidation, toPattern, toShortString, toString, typeCheckChildren, typeError, unordered, verifyParentPointers, verifyParentPointers
protected Operand contentOp
protected boolean preservingTypes
public ParentNodeConstructor()
public void setBaseURI(java.lang.String uri)
uri
- the static base URIpublic void setLazyConstruction(boolean lazy)
lazy
- set to true if lazy construction should be usedpublic final boolean isLazyConstruction()
public SchemaType getSchemaType()
getSchemaType
in interface ValidatingInstruction
public ParseOptions getValidationOptions()
public void setValidationAction(int mode, SchemaType schemaType)
mode
- the validation mode, for example Validation.STRICT
schemaType
- the required type (for validation by type). Null if not
validating by typepublic int getValidationAction()
getValidationAction
in interface ValidatingInstruction
Validation.STRICT
or Validation.PRESERVE
public void setNoNeedToStrip()
public void setContentExpression(Expression content)
content
- the content expressionpublic Expression getContentExpression()
getContentExpression
in interface InstructionWithComplexContent
public Operand getContentOperand()
public int computeCardinality()
computeCardinality
in class Instruction
public Expression typeCheck(ExpressionVisitor visitor, ContextItemStaticInfo contextInfo) 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 class Expression
visitor
- an expression visitorcontextInfo
- Information available statically about the context item: whether it is (possibly)
absent; its static type; its streaming posture.XPathException
- if an error is discovered during this phase
(typically a type error)public boolean allowExtractingCommonSubexpressions()
allowExtractingCommonSubexpressions
in class Expression
protected abstract void checkContentSequence(StaticContext env) throws XPathException
env
- the static contextXPathException
- if the check failspublic Expression optimize(ExpressionVisitor visitor, ContextItemStaticInfo contextItemType) throws XPathException
Expression
This method is called after all references to functions and variables have been resolved to the declaration of the function or variable, and after all type checking has been done.
optimize
in class Expression
visitor
- an expression visitorcontextItemType
- 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
XPathException
- if an error is discovered during this phase
(typically a type error)public final boolean mayCreateNewNodes()
mayCreateNewNodes
in class Instruction
public boolean alwaysCreatesNewNodes()
alwaysCreatesNewNodes
in class Instruction
public int getCardinality()
Expression
getCardinality
in class Expression
public PathMap.PathMapNodeSet addToPathMap(PathMap pathMap, PathMap.PathMapNodeSet pathMapNodeSet)
The default implementation of this method assumes that an expression does no navigation other than the navigation done by evaluating its subexpressions, and that the subexpressions are evaluated in the same context as the containing expression. The method must be overridden for any expression where these assumptions do not hold. For example, implementations exist for AxisExpression, ParentExpression, and RootExpression (because they perform navigation), and for the doc(), document(), and collection() functions because they create a new navigation root. Implementations also exist for PathExpression and FilterExpression because they have subexpressions that are evaluated in a different context from the calling expression.
addToPathMap
in class Expression
pathMap
- the PathMap to which the expression should be addedpathMapNodeSet
- the PathMapNodeSet to which the paths embodied in this expression should be addedpublic boolean isPreservingTypes()
public boolean isLocal()
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