Package net.sf.saxon.event

Class Outputter

  • All Implemented Interfaces:
    javax.xml.transform.Result, Receiver
    Direct Known Subclasses:
    ComplexContentOutputter, EventMonitor, OutputterEventBuffer, ProxyOutputter, SinkOutputter
    public abstract class Outputter
extends java.lang.Object
implements Receiver
    Outputter: This interface represents a recipient of XML tree-walking (push) events. It was originally based on SAX2's ContentHandler, but adapted to handle additional events. Namespaces and Attributes are handled by separate events following the startElement event. Schema types can be defined for elements and attributes.

    The Outputter interface is an important internal interface within Saxon, and provides a powerful mechanism for integrating Saxon with other applications. It has been designed with extensibility and stability in mind. However, it should be considered as an interface designed primarily for internal use, and not as a completely stable part of the public Saxon API.

    Since:
    10.0; derived from the original Outputter interface and SequenceReceiver class. This interface is now used primarily for capturing the results of push-mode evaluation of tree construction expressions in XSLT and XQuery.

    • Field Detail

      • systemId

        protected java.lang.String systemId

    • Constructor Detail

      • Outputter

        public Outputter()

    • Method Detail

      • getConfiguration

        public final Configuration getConfiguration()
        Get the Saxon Configuration
        Returns:
        the configuration

      • setSystemId

        public void setSystemId​(java.lang.String systemId)
        Set the System ID of the tree represented by this event stream
        Specified by:
        setSystemId in interface javax.xml.transform.Result
        Parameters:
        systemId - the system ID (which is used as the base URI of the nodes if there is no xml:base attribute)

      • getSystemId

        public java.lang.String getSystemId()
        Get the system ID
        Specified by:
        getSystemId in interface javax.xml.transform.Result
        Returns:
        the system ID that was supplied using the setSystemId() method

      • startDocument

        public abstract void startDocument​(int properties)
                            throws XPathException
        Notify the start of a document node
        Specified by:
        startDocument in interface Receiver
        Parameters:
        properties - bit-significant integer indicating properties of the document node. The definitions of the bits are in class ReceiverOption
        Throws:
        XPathException - if an error occurs

      • setUnparsedEntity

        public void setUnparsedEntity​(java.lang.String name,
                              java.lang.String systemID,
                              java.lang.String publicID)
                       throws XPathException
        Notify an unparsed entity URI.
        Specified by:
        setUnparsedEntity in interface Receiver
        Parameters:
        name - The name of the unparsed entity
        systemID - The system identifier of the unparsed entity
        publicID - The identifier of the unparsed entity
        Throws:
        XPathException - if an error occurs

      • startElement

        public abstract void startElement​(NodeName elemName,
                                  SchemaType typeCode,
                                  Location location,
                                  int properties)
                           throws XPathException
        Notify the start of an element. This version of startElement() must be followed by calls on attribute(NodeName, SimpleType, String, Location, int) and namespace(String, NamespaceUri, int) to supply the attributes and namespaces; these calls may be terminated by a call on startContent() but this is not mandatory.
        Parameters:
        elemName - the name of the element.
        typeCode - the type annotation of the element.
        location - an object providing information about the module, line, and column where the node originated
        properties - bit-significant properties of the element node. If there are no relevant properties, zero is supplied. The definitions of the bits are in class ReceiverOption
        Throws:
        XPathException - if an error occurs

      • startElement

        public void startElement​(NodeName elemName,
                         SchemaType type,
                         AttributeMap attributes,
                         NamespaceMap namespaces,
                         Location location,
                         int properties)
                  throws XPathException
        Notify the start of an element, supplying all attributes and namespaces
        Specified by:
        startElement in interface Receiver
        Parameters:
        elemName - the name of the element.
        type - the type annotation of the element.
        attributes - the attributes of this element
        namespaces - the in-scope namespaces of this element: generally this is all the in-scope namespaces, without relying on inheriting namespaces from parent elements
        location - an object providing information about the module, line, and column where the node originated
        properties - bit-significant properties of the element node. If there are no relevant properties, zero is supplied. The definitions of the bits are in class ReceiverOption
        Throws:
        XPathException - if an error occurs

      • namespace

        public abstract void namespace​(java.lang.String prefix,
                               NamespaceUri namespaceUri,
                               int properties)
                        throws XPathException
        Notify a namespace binding. This method is called at some point after startElement(). The semantics are similar to the xsl:namespace instruction in XSLT, or the namespace node constructor in XQuery. A namespace must not conflict with any namespaces already used for element or attribute names.
        Parameters:
        prefix - The namespace prefix; zero-length string for the default namespace
        namespaceUri - The namespace URI. In some cases a zero-length string may be used to indicate a namespace undeclaration.
        properties - The REJECT_DUPLICATES property: if set, the namespace declaration will be rejected if it conflicts with a previous declaration of the same prefix. If the property is not set, the namespace declaration will be ignored if it conflicts with a previous declaration. This reflects the fact that when copying a tree, namespaces for child elements are emitted before the namespaces of their parent element. Unfortunately this conflicts with the XSLT rule for complex content construction, where the recovery action in the event of conflicts is to take the namespace that comes last. XSLT therefore doesn't recover from this error:
        Throws:
        XPathException - if an error occurs
        Since:
        changed in 10.0 to report all the in-scope namespaces for an element, and to do so in a single call.

      • namespaces

        public void namespaces​(NamespaceBindingSet bindings,
                       int properties)
                throws XPathException
        Output a set of namespace bindings. This should have the same effect as outputting the namespace bindings individually using namespace(String, NamespaceUri, int), but it may be more efficient. It is used only when copying an element node together with all its namespaces, so less checking is needed that the namespaces form a consistent and complete set
        Parameters:
        bindings - the set of namespace bindings
        properties - any special properties. The property ReceiverOption.NAMESPACE_OK means that no checking is needed.
        Throws:
        XPathException - if any failure occurs

      • attribute

        public abstract void attribute​(NodeName attName,
                               SimpleType typeCode,
                               java.lang.String value,
                               Location location,
                               int properties)
                        throws XPathException
        Notify an attribute. Attributes are notified after the startElement event, and before any children. Namespaces and attributes may be intermingled.
        Parameters:
        attName - The name of the attribute
        typeCode - The type annotation of the attribute
        value - the string value of the attribute
        location - provides information such as line number and system ID.
        properties - Bit significant value. The following bits are defined:
        DISABLE_ESCAPING
        Disable escaping for this attribute
        NO_SPECIAL_CHARACTERS
        Attribute value contains no special characters
        Throws:
        java.lang.IllegalStateException - attempt to output an attribute when there is no open element start tag
        XPathException - if an error occurs

      • startContent

        public void startContent()
                  throws XPathException
        Notify the start of the content, that is, the completion of all attributes and namespaces. Note that the initial Outputter of output from XSLT instructions will not receive this event, it has to detect it itself. Note that this event is reported for every element even if it has no attributes, no namespaces, and no content.
        Throws:
        XPathException - if an error occurs

      • endElement

        public abstract void endElement()
                         throws XPathException
        Notify the end of an element. The Outputter must maintain a stack if it needs to know which element is ending.
        Specified by:
        endElement in interface Receiver
        Throws:
        XPathException - if an error occurs

      • characters

        public abstract void characters​(UnicodeString chars,
                                Location location,
                                int properties)
                         throws XPathException
        Notify character data. Note that some receivers may require the character data to be sent in a single event, but in general this is not a requirement.
        Specified by:
        characters in interface Receiver
        Parameters:
        chars - The characters
        location - provides information such as line number and system ID.
        properties - Bit significant value. The following bits are defined:
        DISABLE_ESCAPING
        Disable escaping for this text node
        USE_CDATA
        Output as a CDATA section
        Throws:
        XPathException - if an error occurs

      • processingInstruction

        public abstract void processingInstruction​(java.lang.String name,
                                           UnicodeString data,
                                           Location location,
                                           int properties)
                                    throws XPathException
        Output a processing instruction
        Specified by:
        processingInstruction in interface Receiver
        Parameters:
        name - The PI name. This must be a legal name (it will not be checked).
        data - The data portion of the processing instruction
        location - provides information such as line number and system ID.
        properties - Additional information about the PI.
        Throws:
        java.lang.IllegalArgumentException - the content is invalid for an XML processing instruction
        XPathException - if an error occurs

      • comment

        public abstract void comment​(UnicodeString content,
                             Location location,
                             int properties)
                      throws XPathException
        Notify a comment. Comments are only notified if they are outside the DTD.
        Specified by:
        comment in interface Receiver
        Parameters:
        content - The content of the comment
        location - provides information such as line number and system ID.
        properties - Additional information about the comment.
        Throws:
        java.lang.IllegalArgumentException - the content is invalid for an XML comment
        XPathException - if an error occurs

      • append

        public void append​(Item item,
                   Location locationId,
                   int properties)
            throws XPathException
        Append an arbitrary item (node, atomic value, or function) to the output. The default implementation throws UnsupportedOperationException.
        Specified by:
        append in interface Receiver
        Parameters:
        item - the item to be appended
        locationId - the location of the calling instruction, for diagnostics
        properties - if the item is an element node, this indicates whether its namespaces need to be copied. Values are ReceiverOption.ALL_NAMESPACES; the default (0) means
        Throws:
        XPathException - if an error occurs

      • append

        public void append​(Item item)
            throws XPathException
        Append an arbitrary item (node, atomic value, or function) to the output. By default, if the item is an element node, it is copied with all namespaces. The default implementation calls append(Item, Location, int), whose default implementation throws UnsupportedOperationException
        Specified by:
        append in interface Receiver
        Parameters:
        item - the item to be appended
        Throws:
        XPathException - if the operation fails

      • getStringReceiver

        public UniStringConsumer getStringReceiver​(boolean asTextNode,
                                           Location loc)
        Get a string-value consumer object that allows an item of type xs:string to be appended one fragment at a time. This potentially allows operations that output large strings to avoid building the entire string in memory. The default implementation, however, simply assembles the string in a buffer and releases the entire string on completion.
        Parameters:
        asTextNode - set to true if the concatenated string values are to be treated as a text node item rather than a string
        Returns:
        an object that accepts xs:string values via a sequence of append() calls

      • usesTypeAnnotations

        public boolean usesTypeAnnotations()
        Ask whether this Outputter (or the downstream pipeline) makes any use of the type annotations supplied on element and attribute events. The default implementation of this method returns false.
        Specified by:
        usesTypeAnnotations in interface Receiver
        Returns:
        true if the Outputter makes any use of this information. If false, the caller may supply untyped nodes instead of supplying the type annotation (or conversely, it may avoid stripping unwanted type annotations)