Package net.sf.saxon.instruct
Class FixedElement
- java.lang.Object
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- net.sf.saxon.expr.ComputedExpression
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- net.sf.saxon.instruct.Instruction
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- net.sf.saxon.instruct.ParentNodeConstructor
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- net.sf.saxon.instruct.ElementCreator
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- net.sf.saxon.instruct.FixedElement
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- All Implemented Interfaces:
java.io.Serializable
,javax.xml.transform.SourceLocator
,Container
,Expression
,TailCallReturner
,InstructionInfoProvider
public class FixedElement extends ElementCreator
An instruction that creates an element node whose name is known statically. Used for literal results elements in XSLT, for direct element constructors in XQuery, and for xsl:element in cases where the name and namespace are known statically.- See Also:
- Serialized Form
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Field Summary
Fields Modifier and Type Field Description protected int[]
namespaceCodes
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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 FixedElement(int nameCode, int[] namespaceCodes, boolean inheritNamespaces, SchemaType schemaType, int validation)
Create an instruction that creates a new element node
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
checkPermittedContents(SchemaType parentType, StaticContext env, boolean whole)
Check that any elements and attributes constructed or returned by this expression are acceptable in the content model of a given complex type.void
display(int level, java.io.PrintStream out, Configuration config)
Display this instruction as an expression, for diagnosticsint[]
getActiveNamespaces()
Callback to get a list of the intrinsic namespaces that need to be generated for the element.InstructionInfo
getInstructionInfo()
Get InstructionInfo for this expressionItemType
getItemType(TypeHierarchy th)
Get the type of the item returned by this instructionint
getNameCode(XPathContext context)
Callback from the superclass ElementCreator to get the nameCode for the element namejava.lang.String
getNewBaseURI(XPathContext context)
Get the base URI for the element being constructedprotected void
outputNamespaceNodes(XPathContext context, Receiver out)
Callback from the superclass ElementCreator to output the namespace nodesExpression
simplify(StaticContext env)
Simplify an expression.-
Methods inherited from class net.sf.saxon.instruct.ElementCreator
checkContentForAttributes, computeSpecialProperties, evaluateItem, getImplementationMethod, getValidationMode, isInheritNamespaces, isValidating, processLeavingTail, 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, getInstructionNameCode, getSourceLocator, isXSLT, iterate, process, promote
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Methods inherited from class net.sf.saxon.expr.ComputedExpression
adoptChildExpression, 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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FixedElement
public FixedElement(int nameCode, int[] namespaceCodes, boolean inheritNamespaces, SchemaType schemaType, int validation)
Create an instruction that creates a new element node- Parameters:
nameCode
- Represents the name of the element nodenamespaceCodes
- List of namespaces to be added to the element node. May be null if none are required.inheritNamespaces
- true if the children of this element are to inherit its namespacesschemaType
- Type annotation for the new element node
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Method Detail
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getInstructionInfo
public InstructionInfo getInstructionInfo()
Description copied from class:ComputedExpression
Get InstructionInfo for this expression- Specified by:
getInstructionInfo
in interfaceInstructionInfoProvider
- Overrides:
getInstructionInfo
in classInstruction
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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).- 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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getItemType
public ItemType getItemType(TypeHierarchy th)
Get the type of the item returned by this instruction- Specified by:
getItemType
in interfaceExpression
- Overrides:
getItemType
in classElementCreator
- Parameters:
th
-- Returns:
- the item type
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getNameCode
public int getNameCode(XPathContext context)
Callback from the superclass ElementCreator to get the nameCode for the element name- Specified by:
getNameCode
in classElementCreator
- Parameters:
context
- The evaluation context (not used)- Returns:
- the name code for the element name
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getNewBaseURI
public java.lang.String getNewBaseURI(XPathContext context)
Description copied from class:ElementCreator
Get the base URI for the element being constructed- Specified by:
getNewBaseURI
in classElementCreator
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checkPermittedContents
public void checkPermittedContents(SchemaType parentType, StaticContext env, boolean whole) throws XPathException
Check that any elements and attributes constructed or returned by this expression are acceptable in the content model of a given complex type. It's always OK to say yes, since the check will be repeated at run-time. The process of checking element and attribute constructors against the content model of a complex type also registers the type of content expected of those constructors, so the static validation can continue recursively.- Specified by:
checkPermittedContents
in interfaceExpression
- Overrides:
checkPermittedContents
in classComputedExpression
- Parameters:
parentType
- The schema typeenv
- the static contextwhole
- true if this expression is expected to make the whole content of the type, false if it is expected to make up only a part- Throws:
XPathException
- if the expression doesn't match the required content type
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outputNamespaceNodes
protected void outputNamespaceNodes(XPathContext context, Receiver out) throws XPathException
Callback from the superclass ElementCreator to output the namespace nodes- Specified by:
outputNamespaceNodes
in classElementCreator
- Parameters:
context
- The evaluation context (not used)out
- The receiver to handle the output- Throws:
XPathException
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getActiveNamespaces
public int[] getActiveNamespaces()
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
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display
public void display(int level, java.io.PrintStream out, Configuration config)
Display this instruction as an expression, for diagnostics- Parameters:
level
- indentation level for this expressionout
- Output destination
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