net.sf.saxon.expr.instruct

Class Actor

java.lang.Object

net.sf.saxon.expr.instruct.Actor

All Implemented Interfaces:

javax.xml.transform.SourceLocator, ExpressionOwner, Location, InstructionInfo, org.xml.sax.Locator

Direct Known Subclasses:

Accumulator, AttributeSet, GlobalVariable, KeyDefinition, Mode, NamedTemplate, UserFunction

public abstract class Actor
extends java.lang.Object
implements InstructionInfo, ExpressionOwner

This object represents the compiled form of a user-written function, template, attribute-set, etc (the source can be either an XSLT stylesheet function or an XQuery function).

It is assumed that type-checking, of both the arguments and the results, has been handled at compile time. That is, the expression supplied as the body of the function must be wrapped in code to check or convert the result to the required type, and calls on the function must be wrapped at compile time to check or convert the supplied arguments.

Field Summary

Fields

Modifier and Type	Field and Description
protected Expression	body

Constructor Summary

Constructors

Constructor and Description
Actor()

Method Summary

Modifier and Type	Method and Description
void	allocateAllBindingSlots(StylesheetPackage pack) Allocate slot numbers to all the external component references in this component
static void	allocateBindingSlotsRecursive(StylesheetPackage pack, Actor p, Expression exp, java.util.List<ComponentBinding> bindings)
abstract void	export(ExpressionPresenter presenter) Export expression structure.
Expression	getBody()
int	getColumnNumber() Get the column number.
abstract int	getComponentKind() Get the kind of component that this represents, using integer constants such as StandardNames.XSL_FUNCTION
Visibility	getDeclaredVisibility() Get the visibility of the component as defined using its actual @visibility attribute
Component	getDeclaringComponent()
int	getLineNumber() Get the line number.
Location	getLocation()
PackageData	getPackageData() Get basic data about the unit of compilation (XQuery module, XSLT package) to which this container belongs
java.util.Iterator<java.lang.String>	getProperties() Get an iterator over all the properties available.
java.lang.Object	getProperty(java.lang.String name) Get the value of a particular property of the instruction.
java.lang.String	getPublicId() Get the Public ID
RetainedStaticContext	getRetainedStaticContext()
SlotManager	getStackFrameMap()
abstract SymbolicName	getSymbolicName() Get the symbolic name of the component
java.lang.String	getSystemId() Get the system ID.
boolean	isExportable()
Component	makeDeclaringComponent(Visibility visibility, StylesheetPackage declaringPackage)
Component	obtainDeclaringComponent(StyleElement declaration) Return the declaring component, creating it if it does not already exist.
Location	saveLocation() Get an immutable copy of this Location object.
void	setBody(Expression body)
void	setChildExpression(Expression expr)
void	setDeclaredVisibility(Visibility visibility) Set the visibility of the component as defined using its actual @visibility attribute
void	setDeclaringComponent(Component comp)
void	setLineNumber(int lineNumber)
void	setPackageData(PackageData packageData) Set basic data about the unit of compilation (XQuery module, XSLT package) to which this procedure belongs
void	setRetainedStaticContext(RetainedStaticContext rsc)
void	setStackFrameMap(SlotManager map)
void	setSystemId(java.lang.String systemId)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface net.sf.saxon.trace.InstructionInfo

getConstructType, getObjectName

Field Detail

body

protected Expression body

Constructor Detail

Actor

public Actor()

Method Detail

getSymbolicName

public abstract SymbolicName getSymbolicName()

Get the symbolic name of the component

Returns:

the symbolic name

setPackageData

public void setPackageData(PackageData packageData)

Set basic data about the unit of compilation (XQuery module, XSLT package) to which this procedure belongs

Parameters:

packageData - information about the containing package

getPackageData

public PackageData getPackageData()

Get basic data about the unit of compilation (XQuery module, XSLT package) to which this container belongs

makeDeclaringComponent

public Component makeDeclaringComponent(Visibility visibility,
                                        StylesheetPackage declaringPackage)

obtainDeclaringComponent

public Component obtainDeclaringComponent(StyleElement declaration)

Return the declaring component, creating it if it does not already exist.

Parameters:

declaration - The source element in the stylesheet corresponding to the component

Returns:

the component corresponding to this declaration.

getDeclaringComponent

public Component getDeclaringComponent()

setDeclaringComponent

public void setDeclaringComponent(Component comp)

allocateAllBindingSlots

public void allocateAllBindingSlots(StylesheetPackage pack)

Allocate slot numbers to all the external component references in this component

Parameters:

pack - the containing package

allocateBindingSlotsRecursive

public static void allocateBindingSlotsRecursive(StylesheetPackage pack,
                                                 Actor p,
                                                 Expression exp,
                                                 java.util.List<ComponentBinding> bindings)

setBody

public void setBody(Expression body)

getBody

public final Expression getBody()

setStackFrameMap

public void setStackFrameMap(SlotManager map)

getStackFrameMap

public SlotManager getStackFrameMap()

setLineNumber

public void setLineNumber(int lineNumber)

setSystemId

public void setSystemId(java.lang.String systemId)

getLocation

public Location getLocation()

getLineNumber

public int getLineNumber()

Description copied from interface: Location

Get the line number. This line number is relative to the external entity identified by the system identifier. Line numbers start at 1. The value may be an approximation; SAX parsers only provide line number information at the level of element nodes.

Specified by:

getLineNumber in interface javax.xml.transform.SourceLocator

Specified by:

getLineNumber in interface Location

Specified by:

getLineNumber in interface org.xml.sax.Locator

Returns:

the line number, or -1 if the information is not available.

getSystemId

public java.lang.String getSystemId()

Description copied from interface: Location

Get the system ID. This should be the system identifier of an XML external entity; if a stylesheet module comprises multiple external entities, the distinction should be retained. This means, for example, that an instruction in a stylesheet can have a different system identifier from its parent instruction. However, SAX parsers only provide location information at the element level, so when part of an XPath expression is in a different external entity from other parts of the same expression, this distinction is lost.

The system identifier of a node is in general not the same as its base URI. The base URI is affected by xml:base attributes; the system identifier is not.

Specified by:

getSystemId in interface javax.xml.transform.SourceLocator

Specified by:

getSystemId in interface Location

Specified by:

getSystemId in interface org.xml.sax.Locator

Returns:

the system ID, or null if the information is not available.

getColumnNumber

public int getColumnNumber()

Description copied from interface: Location

Get the column number. This column number is relative to the line identified by the line number. Column numbers start at 1.

Specified by:

getColumnNumber in interface javax.xml.transform.SourceLocator

Specified by:

getColumnNumber in interface Location

Specified by:

getColumnNumber in interface org.xml.sax.Locator

Returns:

the column number, or -1 if the information is not available.

getPublicId

public java.lang.String getPublicId()

Description copied from interface: Location

Get the Public ID

Specified by:

getPublicId in interface javax.xml.transform.SourceLocator

Specified by:

getPublicId in interface Location

Specified by:

getPublicId in interface org.xml.sax.Locator

Returns:

usually null

saveLocation

public Location saveLocation()

Description copied from interface: Location

Get an immutable copy of this Location object. By default Location objects may be mutable, so they should not be saved for later use. The result of this operation holds the same location information, but in an immutable form.

Specified by:

saveLocation in interface Location

setRetainedStaticContext

public void setRetainedStaticContext(RetainedStaticContext rsc)

getRetainedStaticContext

public RetainedStaticContext getRetainedStaticContext()

getProperty

public java.lang.Object getProperty(java.lang.String name)

Description copied from interface: InstructionInfo

Get the value of a particular property of the instruction. Properties of XSLT instructions are generally known by the name of the stylesheet attribute that defines them.

Specified by:

getProperty in interface InstructionInfo

Parameters:

name - The name of the required property

Returns:

The value of the requested property, or null if the property is not available

setDeclaredVisibility

public void setDeclaredVisibility(Visibility visibility)

Set the visibility of the component as defined using its actual @visibility attribute

Parameters:

visibility - the actual declared visibility; null if the visibility attribute is absent

getDeclaredVisibility

public Visibility getDeclaredVisibility()

Get the visibility of the component as defined using its actual @visibility attribute

Returns:

the actual declared visibility; null if the visibility attribute is absent

getProperties

public java.util.Iterator<java.lang.String> getProperties()

Get an iterator over all the properties available. The values returned by the iterator will be of type String, and each string can be supplied as input to the getProperty() method to retrieve the value of the property. The iterator may return properties whose value is null.

Specified by:

getProperties in interface InstructionInfo

Returns:

an iterator over the properties.

getComponentKind

public abstract int getComponentKind()

Get the kind of component that this represents, using integer constants such as StandardNames.XSL_FUNCTION

export

public abstract void export(ExpressionPresenter presenter)
                     throws XPathException

Export expression structure. The abstract expression tree is written to the supplied outputstream.

Parameters:

presenter - the expression presenter used to generate the XML representation of the structure

Throws:

XPathException

isExportable

public boolean isExportable()

setChildExpression

public void setChildExpression(Expression expr)

Specified by:

setChildExpression in interface ExpressionOwner