public class Copy extends ElementCreator
inheritNamespacesFromParent, inheritNamespacesToChildren
contentOp, preservingTypes
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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Copy(boolean copyNamespaces,
boolean inheritNamespaces,
SchemaType schemaType,
int validation)
Create a shallow copy instruction
param select selects the node (or other item) to be copied.
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Modifier and Type | Method and Description |
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Expression |
copy(RebindingMap rebindings)
Copy an expression.
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static void |
copyUnparsedEntities(NodeInfo source,
SequenceReceiver out) |
Item |
evaluateItem(XPathContext context)
Evaluate as an expression.
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void |
export(ExpressionPresenter out)
Diagnostic print of expression structure.
|
NamespaceBinding[] |
getActiveNamespaces()
Callback to get a list of the intrinsic namespaces that need to be generated for the element.
|
NodeName |
getElementName(XPathContext context,
NodeInfo copiedNode)
Callback from ElementCreator when constructing an element
|
int |
getInstructionNameCode()
Get the name of this instruction for diagnostic and tracing purposes
|
int |
getIntrinsicDependencies()
Determine which aspects of the context the expression depends on.
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ItemType |
getItemType()
Get the item type of the result of this instruction.
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java.lang.String |
getNewBaseURI(XPathContext context,
NodeInfo copiedNode)
Get the base URI of a copied element node (the base URI is retained in the new copy)
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java.lang.String |
getStreamerName()
Get the (partial) name of a class that supports streaming of this kind of expression
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boolean |
isCopyNamespaces()
Ask whether namespace nodes are to be copied (in the case of an element)
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java.lang.Iterable<Operand> |
operands()
Get the immediate sub-expressions of this expression, with information about the relationship
of each expression to its parent expression.
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Expression |
optimize(ExpressionVisitor visitor,
ContextItemStaticInfo contextItemType)
Perform optimisation of an expression and its subexpressions.
|
void |
outputNamespaceNodes(XPathContext context,
Receiver receiver,
NodeName nodeName,
NodeInfo copiedNode)
Callback to output namespace nodes for the new element.
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TailCall |
processLeavingTail(XPathContext context)
Evaluate the instruction to produce a new element node.
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void |
setCopyNamespaces(boolean copy)
Say whether namespace nodes are to be copied (in the case of an element)
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Expression |
simplify()
Simplify an expression.
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Expression |
typeCheck(ExpressionVisitor visitor,
ContextItemStaticInfo contextInfo)
Perform type checking of an expression and its subexpressions.
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checkContentSequence, computeSpecialProperties, exportValidationAndType, getCardinality, getImplementationMethod, getInheritanceFlags, isInheritNamespacesFromParent, isInheritNamespacesToChildren, processLeavingTail, setInheritanceFlags, setInheritNamespacesFromParent, setInheritNamespacesToChildren, suppressValidation
addToPathMap, allowExtractingCommonSubexpressions, alwaysCreatesNewNodes, computeCardinality, getContentExpression, getContentOperand, getSchemaType, getValidationAction, getValidationOptions, isLazyConstruction, isLocal, isPreservingTypes, mayCreateNewNodes, setBaseURI, setContentExpression, setLazyConstruction, setNoNeedToStrip, setValidationAction
assembleParams, assembleTunnelParams, dynamicError, evaluateAsString, getConstructType, getExpressionName, getInstructionName, getNetCost, getSourceLocator, isInstruction, isXSLT, iterate, process, someOperandCreatesNewNodes
adoptChildExpression, checkedOperands, checkForUpdatingSubexpressions, checkPermittedContents, computeDependencies, computeHashCode, computeStaticProperties, dynamicError, effectiveBooleanValue, evaluatePendingUpdates, explain, getConfiguration, getCost, getDependencies, getEvaluationMethod, getExtraProperty, getIntegerBounds, getInterpretedExpression, getLocalRetainedStaticContext, getLocation, getObjectName, getPackageData, getParentExpression, getProperties, getProperty, getRetainedStaticContext, getScopingExpression, getSlotsUsed, getSpecialProperties, getStaticBaseURI, getStaticBaseURIString, getStaticType, getStaticUType, 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, simplifyChildren, staticTypeCheck, toPattern, toShortString, toString, typeCheckChildren, typeError, unordered, verifyParentPointers, verifyParentPointers
public Copy(boolean copyNamespaces, boolean inheritNamespaces, SchemaType schemaType, int validation)
copyNamespaces
- true if namespace nodes are to be copied when copying an elementinheritNamespaces
- true if child elements are to inherit the namespace nodes of their parentschemaType
- the Schema type against which the content is to be validatedvalidation
- the schema validation modepublic void setCopyNamespaces(boolean copy)
copy
- set to true if namespace nodes are to be copiedpublic boolean isCopyNamespaces()
public Expression simplify() throws XPathException
simplify
in class Expression
XPathException
- if an error is discovered during expression rewritingpublic 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 ParentNodeConstructor
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 Expression copy(RebindingMap rebindings)
copy
in class Expression
rebindings
- public int getIntrinsicDependencies()
getIntrinsicDependencies
in class Expression
public int getInstructionNameCode()
getInstructionNameCode
in class Instruction
public java.lang.Iterable<Operand> operands()
operands
in class Instruction
public ItemType getItemType()
getItemType
in class ElementCreator
public 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 ParentNodeConstructor
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 NodeName getElementName(XPathContext context, NodeInfo copiedNode) throws XPathException
getElementName
in class ElementCreator
context
- XPath dynamic evaluation contextcopiedNode
- the node being copiedXPathException
public java.lang.String getNewBaseURI(XPathContext context, NodeInfo copiedNode)
getNewBaseURI
in class ElementCreator
context
- XPath dynamic evaluation contextcopiedNode
- the node being copied (for xsl:copy), otherwise nullpublic void outputNamespaceNodes(XPathContext context, Receiver receiver, NodeName nodeName, NodeInfo copiedNode) throws XPathException
outputNamespaceNodes
in class ElementCreator
context
- The execution contextreceiver
- the Receiver where the namespace nodes are to be writtennodeName
- the element namecopiedNode
- the node being copied (for xsl:copy), otherwise nullXPathException
public NamespaceBinding[] getActiveNamespaces() throws XPathException
getActiveNamespaces
in class ElementCreator
XPathException
- if an error occurspublic TailCall processLeavingTail(XPathContext context) throws XPathException
ElementCreator
processLeavingTail
in interface TailCallReturner
processLeavingTail
in class ElementCreator
context
- XPath dynamic evaluation contextXPathException
- if a dynamic error occurs during the evaluation
of the instructionpublic static void copyUnparsedEntities(NodeInfo source, SequenceReceiver out) throws XPathException
XPathException
public Item evaluateItem(XPathContext context) throws XPathException
evaluateItem
in class ElementCreator
context
- The context in which the expression is to be evaluatedXPathException
- if any dynamic error occurs evaluating the
expressionpublic java.lang.String getStreamerName()
getStreamerName
in class ElementCreator
public void export(ExpressionPresenter out) throws XPathException
export
in interface ExportAgent
export
in class Expression
out
- the expression presenter used to display the structureXPathException
- if the export fails, for example if an expression is found that won't work
in the target environment.Copyright (c) 2004-2018 Saxonica Limited. All rights reserved.