Package net.sf.saxon.instruct
Class Copy
- java.lang.Object
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- All Implemented Interfaces:
java.io.Serializable
,javax.xml.transform.SourceLocator
,Container
,Expression
,TailCallReturner
,InstructionInfoProvider
public class Copy extends ElementCreator
Handler for xsl:copy elements in stylesheet.- See Also:
- Serialized Form
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Field Summary
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Fields inherited from class net.sf.saxon.instruct.ElementCreator
inheritNamespaces, validating
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Fields inherited from class net.sf.saxon.instruct.ParentNodeConstructor
content, validation
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Fields inherited from class net.sf.saxon.expr.ComputedExpression
locationId, staticProperties
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Fields inherited from interface net.sf.saxon.expr.Expression
EVALUATE_METHOD, ITERATE_METHOD, PROCESS_METHOD
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Constructor Summary
Constructors Constructor Description Copy(boolean copyNamespaces, boolean inheritNamespaces, SchemaType schemaType, int validation)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
display(int level, java.io.PrintStream out, Configuration config)
Diagnostic print of expression structure.Item
evaluateItem(XPathContext context)
Evaluate as an expression.int[]
getActiveNamespaces()
Callback to get a list of the intrinsic namespaces that need to be generated for the element.int
getInstructionNameCode()
Get the name of this instruction for diagnostic and tracing purposesItemType
getItemType(TypeHierarchy th)
Get the item type of the result of this instruction.int
getNameCode(XPathContext context)
Callback from ElementCreator when constructing an elementjava.lang.String
getNewBaseURI(XPathContext context)
Get the base URI of a copied element node (the base URI is retained in the new copy)protected void
outputNamespaceNodes(XPathContext context, Receiver receiver)
Callback to output namespace nodes for the new element.TailCall
processLeavingTail(XPathContext context)
Evaluate the instruction to produce a new element node.Expression
simplify(StaticContext env)
Simplify an expression.-
Methods inherited from class net.sf.saxon.instruct.ElementCreator
checkContentForAttributes, computeSpecialProperties, getImplementationMethod, getValidationMode, isInheritNamespaces, isValidating, setValidationMode, suppressValidation
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Methods inherited from class net.sf.saxon.instruct.ParentNodeConstructor
createsNewNodes, getBaseURI, getCardinality, getContentExpression, getSchemaType, getValidationAction, isLazyConstruction, isNamespaceSensitive, iterateSubExpressions, optimize, promoteInst, replaceSubExpression, setBaseURI, setContentExpression, setLazyConstruction, setSchemaType, typeCheck, verifyLazyConstruction
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Methods inherited from class net.sf.saxon.instruct.Instruction
appendItem, assembleParams, assembleTunnelParams, computeCardinality, dynamicError, evaluateAsString, getInstructionInfo, getSourceLocator, isXSLT, iterate, process, promote
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Methods inherited from class net.sf.saxon.expr.ComputedExpression
adoptChildExpression, checkPermittedContents, computeDependencies, computeStaticProperties, doPromotion, dynamicError, effectiveBooleanValue, getColumnNumber, getConstructType, getDependencies, getExecutable, getHostLanguage, getIntrinsicDependencies, getLineNumber, getLocationId, getLocationProvider, getParentExpression, getPublicId, getSlotsUsed, getSpecialProperties, getSystemId, hasBadParentPointer, markTailFunctionCalls, resetStaticProperties, setLocationId, setParentExpression, setParentExpression, typeError
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Constructor Detail
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Copy
public Copy(boolean copyNamespaces, boolean inheritNamespaces, SchemaType schemaType, int validation)
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Method Detail
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simplify
public Expression simplify(StaticContext env) throws XPathException
Simplify an expression. This performs any static optimization (by rewriting the expression as a different expression). The default implementation does nothing.- Specified by:
simplify
in interfaceExpression
- Overrides:
simplify
in classParentNodeConstructor
- Parameters:
env
- the static context- Returns:
- the simplified expression
- Throws:
XPathException
- if an error is discovered during expression rewriting
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getInstructionNameCode
public int getInstructionNameCode()
Get the name of this instruction for diagnostic and tracing purposes- Overrides:
getInstructionNameCode
in classInstruction
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getItemType
public ItemType getItemType(TypeHierarchy th)
Get the item type of the result of this instruction.- Specified by:
getItemType
in interfaceExpression
- Overrides:
getItemType
in classElementCreator
- Parameters:
th
-- Returns:
- The context item type.
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getNameCode
public int getNameCode(XPathContext context) throws XPathException
Callback from ElementCreator when constructing an element- Specified by:
getNameCode
in classElementCreator
- Parameters:
context
-- Returns:
- the namecode of the element to be constructed
- Throws:
XPathException
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getNewBaseURI
public java.lang.String getNewBaseURI(XPathContext context)
Get the base URI of a copied element node (the base URI is retained in the new copy)- Specified by:
getNewBaseURI
in classElementCreator
- Parameters:
context
-- Returns:
- the base URI
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outputNamespaceNodes
protected void outputNamespaceNodes(XPathContext context, Receiver receiver) throws XPathException
Callback to output namespace nodes for the new element.- Specified by:
outputNamespaceNodes
in classElementCreator
- Parameters:
context
- The execution contextreceiver
- the Receiver where the namespace nodes are to be written- Throws:
XPathException
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getActiveNamespaces
public int[] getActiveNamespaces() throws XPathException
Callback to get a list of the intrinsic namespaces that need to be generated for the element. The result is an array of namespace codes, the codes either occupy the whole array or are terminated by a -1 entry. A result of null is equivalent to a zero-length array.- Overrides:
getActiveNamespaces
in classElementCreator
- Throws:
XPathException
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processLeavingTail
public TailCall processLeavingTail(XPathContext context) throws XPathException
Description copied from class:ElementCreator
Evaluate the instruction to produce a new element node. This method is typically used when there is a parent element or document in a result tree, to which the new element is added.- Specified by:
processLeavingTail
in interfaceTailCallReturner
- Overrides:
processLeavingTail
in classElementCreator
- Parameters:
context
- The dynamic context of the transformation, giving access to the current node, the current variables, etc.- Returns:
- null (this instruction never returns a tail call)
- Throws:
XPathException
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evaluateItem
public Item evaluateItem(XPathContext context) throws XPathException
Evaluate as an expression. We rely on the fact that when these instructions are generated by XQuery, there will always be a valueExpression to evaluate the content- Specified by:
evaluateItem
in interfaceExpression
- Overrides:
evaluateItem
in classElementCreator
- Parameters:
context
- The context in which the expression is to be evaluated- Returns:
- the node or atomic value that results from evaluating the expression; or null to indicate that the result is an empty sequence
- Throws:
XPathException
- if any dynamic error occurs evaluating the expression
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display
public void display(int level, java.io.PrintStream out, Configuration config)
Diagnostic print of expression structure. The expression is written to the System.err output stream- Parameters:
level
- indentation level for this expressionout
-config
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