net.sf.saxon.instruct

Class FixedElement

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.
Field Summary
protected int[]namespaceCodes
Constructor Summary
FixedElement(int nameCode, int[] namespaceCodes, boolean inheritNamespaces, SchemaType schemaType, int validation)
Create an instruction that creates a new element node
Method Summary
protected voidcheckContentSequence(StaticContext env)
Check statically whether the content of the element creates attributes or namespaces after creating any child nodes
voidcheckPermittedContents(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.
Expressioncopy()
Copy an expression.
voidexplain(ExpressionPresenter out)
Diagnostic print of expression structure.
int[]getActiveNamespaces()
Callback to get a list of the intrinsic namespaces that need to be generated for the element.
ItemTypegetItemType(TypeHierarchy th)
Get the type of the item returned by this instruction
intgetNameCode(XPathContext context)
Callback from the superclass ElementCreator to get the nameCode for the element name
StringgetNewBaseURI(XPathContext context)
shortgetURICode(NamePool pool)
Get the URI code representing the namespace URI of the element being constructed
Expressionoptimize(ExpressionVisitor visitor, ItemType contextItemType)
protected voidoutputNamespaceNodes(XPathContext context, Receiver out, int nameCode)
Callback from the superclass ElementCreator to output the namespace nodes
Expressionsimplify(ExpressionVisitor visitor)
Simplify an expression.

Field Detail

namespaceCodes

protected int[] namespaceCodes

Constructor Detail

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 node namespaceCodes 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 namespaces schemaType Type annotation for the new element node validation Validation mode to be applied, for example STRICT, LAX, SKIP

Method Detail

checkContentSequence

protected void checkContentSequence(StaticContext env)
Check statically whether the content of the element creates attributes or namespaces after creating any child nodes

Parameters: env the static context

Throws: net.sf.saxon.trans.XPathException

checkPermittedContents

public 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. 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.

copy

public Expression copy()
Copy an expression. This makes a deep copy.

Returns: the copy of the original expression

explain

public void explain(ExpressionPresenter out)
Diagnostic print of expression structure. The abstract expression tree is written to the supplied output destination.

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.

getItemType

public ItemType getItemType(TypeHierarchy th)
Get the type of the item returned by this instruction

Parameters: th The type hierarchy cache

Returns: the item type

getNameCode

public int getNameCode(XPathContext context)
Callback from the superclass ElementCreator to get the nameCode for the element name

Parameters: context The evaluation context (not used)

Returns: the name code for the element name

getNewBaseURI

public String getNewBaseURI(XPathContext context)

getURICode

public short getURICode(NamePool pool)
Get the URI code representing the namespace URI of the element being constructed

Parameters: pool the NamePool

Returns: the URI code

optimize

public Expression optimize(ExpressionVisitor visitor, ItemType contextItemType)

outputNamespaceNodes

protected void outputNamespaceNodes(XPathContext context, Receiver out, int nameCode)
Callback from the superclass ElementCreator to output the namespace nodes

Parameters: context The evaluation context (not used) out The receiver to handle the output nameCode

simplify

public Expression simplify(ExpressionVisitor visitor)
Simplify an expression. This performs any context-independent rewriting

Parameters: visitor the expression visitor

Returns: the simplified expression

Throws: net.sf.saxon.trans.XPathException if an error is discovered during expression rewriting