Package net.sf.saxon.expr.instruct

Class TemplateRule

  • All Implemented Interfaces:
    javax.xml.transform.SourceLocator, ExpressionOwner, Locatable, Location, Traceable, TraceableComponent, RuleTarget, org.xml.sax.Locator
    Direct Known Subclasses:
    TemplateRuleEE
    public class TemplateRule
extends java.lang.Object
implements RuleTarget, Location, ExpressionOwner, TraceableComponent
    The runtime object corresponding to an xsl:template element in the stylesheet.

    Note that the Template object no longer has precedence information associated with it; this is now only in the Rule object that references this Template. This allows two rules to share the same template, with different precedences. This occurs when a stylesheet module is imported more than once, from different places, with different import precedences.

    From Saxon 9.7, the old Template class is split into NamedTemplate and TemplateRule.

    From Saxon 9.8, a subclass is used in Saxon-EE

    • Constructor Detail

      • TemplateRule

        public TemplateRule()
        Create a template

    • Method Detail

      • setMatchPattern

        public void setMatchPattern​(Pattern pattern)
        Set the match pattern used with this template
        Parameters:
        pattern - the match pattern (may be null for a named template)

      • getBody

        public Expression getBody()
        Description copied from interface: TraceableComponent
        Get the expression at the root of the expression tree used to evaluate this construct
        Specified by:
        getBody in interface TraceableComponent
        Returns:
        the root expression

      • getLocation

        public Location getLocation()
        Description copied from interface: Locatable
        Get the location of the construct
        Specified by:
        getLocation in interface Locatable
        Returns:
        the location. If no location information is available, the method should return Loc.NONE rather than returning null. However, callers would be well advised to check for the result being null.

      • gatherProperties

        public void gatherProperties​(java.util.function.BiConsumer<java.lang.String,​java.lang.Object> consumer)
        Get the properties of this object to be included in trace messages, by supplying the property values to a supplied consumer function
        Specified by:
        gatherProperties in interface Traceable
        Parameters:
        consumer - the function to which the properties should be supplied, as (property name, value) pairs.

      • setContextItemRequirements

        public void setContextItemRequirements​(ItemType type,
                                       boolean absentFocus)
        Set the required context item type. Used when there is an xsl:context-item child element
        Parameters:
        type - the required context item type
        absentFocus - true if the context item is treated as absent even if supplied (use="absent")

      • getComponentKind

        public int getComponentKind()

      • getMatchPattern

        public Pattern getMatchPattern()
        Get the match pattern used with this template
        Returns:
        the match pattern, or null if this is a named template with no match pattern. In the case of a template rule whose pattern is a union pattern, this will be the original union pattern; the individual Rule objects contain the branches of the union pattern.

      • setBody

        public void setBody​(Expression body)
        Set the expression that forms the body of the template
        Specified by:
        setBody in interface TraceableComponent
        Parameters:
        body - the body of the template

      • setStackFrameMap

        public void setStackFrameMap​(SlotManager map)

      • getStackFrameMap

        public SlotManager getStackFrameMap()

      • setHasRequiredParams

        public void setHasRequiredParams​(boolean has)
        Set whether this template has one or more required parameters
        Parameters:
        has - true if the template has at least one required parameter

      • hasRequiredParams

        public boolean hasRequiredParams()
        Ask whether this template has one or more required parameters
        Returns:
        true if this template has at least one required parameter

      • setRequiredType

        public void setRequiredType​(SequenceType type)
        Set the required type to be returned by this template
        Parameters:
        type - the required type as defined in the "as" attribute on the xsl:template element

      • getRequiredType

        public SequenceType getRequiredType()
        Get the required type to be returned by this template
        Returns:
        the required type as defined in the "as" attribute on the xsl:template element

      • registerRule

        public void registerRule​(Rule rule)
        Register a rule for which this is the target
        Specified by:
        registerRule in interface RuleTarget
        Parameters:
        rule - a rule in which this is the target

      • getRules

        public java.util.List<Rule> getRules()
        Get the rules that use this template. For a template with no match pattern, this will be an empty list. For a union pattern, there will be one rule for each branch of the union.
        Returns:
        the rules corresponding to this template.

      • getContainerGranularity

        public int getContainerGranularity()

      • setPackageData

        public void setPackageData​(PackageData data)

      • getPublicId

        public java.lang.String getPublicId()
        Description copied from interface: Location
        Get the Public ID
        Specified by:
        getPublicId in interface Location
        Specified by:
        getPublicId in interface org.xml.sax.Locator
        Specified by:
        getPublicId in interface javax.xml.transform.SourceLocator
        Returns:
        usually null

      • 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 Location
        Specified by:
        getSystemId in interface org.xml.sax.Locator
        Specified by:
        getSystemId in interface javax.xml.transform.SourceLocator
        Returns:
        the system ID, or null if the information is not available.

      • setSystemId

        public void setSystemId​(java.lang.String id)

      • 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 Location
        Specified by:
        getLineNumber in interface org.xml.sax.Locator
        Specified by:
        getLineNumber in interface javax.xml.transform.SourceLocator
        Returns:
        the line number, or -1 if the information is not available.

      • setLineNumber

        public void setLineNumber​(int line)

      • setColumnNumber

        public void setColumnNumber​(int col)

      • 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 Location
        Specified by:
        getColumnNumber in interface org.xml.sax.Locator
        Specified by:
        getColumnNumber in interface javax.xml.transform.SourceLocator
        Returns:
        the column number, or -1 if the information is not available.

      • saveLocation

        public Location saveLocation()
        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
        Returns:
        an immutable copy (which may be the original object, if it is already immutable)

      • getRequiredContextItemType

        public ItemType getRequiredContextItemType()

      • isAbsentFocus

        public boolean isAbsentFocus()

      • getLocalParams

        public java.util.List<LocalParam> getLocalParams()

      • prepareInitializer

        public void prepareInitializer​(Compilation compilation,
                               ComponentDeclaration decl,
                               StructuredQName modeName)
        Prepare for JIT compilation.
        Parameters:
        compilation - the XSLT compilation
        decl - the component declaration of this template rule

      • initialize

        public void initialize()
                throws XPathException
        Ensure that any first-time initialization has been done. Used in Saxon-EE to do JIT compilation
        Throws:
        XPathException

      • apply

        public void apply​(Outputter output,
                  XPathContextMajor context)
           throws XPathException
        Process the template, without returning any tail calls. This path is used by xsl:apply-imports and xsl:next-match
        Parameters:
        output - the destination for the result
        context - The dynamic context, giving access to the current node,
        Throws:
        XPathException - if a dynamic error occurs while evaluating the template

      • applyLeavingTail

        public TailCall applyLeavingTail​(Outputter output,
                                 XPathContext context)
                          throws XPathException
        Process this template, with the possibility of returning a tail call package if the template contains any tail calls that are to be performed by the caller.
        Parameters:
        output - the destination for the result
        context - the XPath dynamic context
        Returns:
        null if the template exited normally; but if it was a tail call, details of the call that hasn't been made yet and needs to be made by the caller
        Throws:
        XPathException - if a dynamic error occurs while evaluating the template

      • setDeclaredStreamable

        public void setDeclaredStreamable​(boolean streamable)
        Say whether or not this template is declared as streamable
        Parameters:
        streamable - true if the template belongs to a streamable mode; set to false if it does not belong to a streamable mode, or if it is found that the template is not actually streamable, and fallback to non-streaming has been requested.

      • isDeclaredStreamable

        public boolean isDeclaredStreamable()

      • getInterpretedBody

        public Expression getInterpretedBody()

      • copy

        public TemplateRule copy()
        Create a copy of a template rule. This is needed when copying a rule from the "omniMode" (mode=#all) to a specific mode. Because we want the rules to be chained in the right order within the mode object, we create the copy as soon as we know it is needed. The problem is that at this stage many of the properties of the template rule are still uninitialised. So we mark the new copy as a slave of the original, and at the end of the compilation process we update all the slave copies to match the properties of the original.

      • updateSlaveCopies

        public void updateSlaveCopies()
        Update the properties of template rules that have been marked as slave copies of this one (typically the same template, but in a different mode).

      • getObjectName

        public StructuredQName getObjectName()
        Description copied from interface: Traceable
        Get a name identifying the object of the expression, for example a function name, template name, variable name, key name, element name, etc. This is used only where the name is known statically.
        Specified by:
        getObjectName in interface Traceable
        Returns:
        the QName of the object declared or manipulated by this instruction or expression

      • getTracingTag

        public java.lang.String getTracingTag()
        Description copied from interface: TraceableComponent
        Get a string to identify the type of component
        Specified by:
        getTracingTag in interface TraceableComponent
        Returns:
        an identifying string