Package net.sf.saxon.pull

Interface UnfailingPullProvider

  • All Superinterfaces:
    PullProvider
    All Known Implementing Classes:
    PullFromIterator, TreeWalker
    public interface UnfailingPullProvider
extends PullProvider
    PullProvider is Saxon's pull-based interface for reading XML documents and XDM sequences. A PullProvider can deliver any sequence of nodes or atomic values.

    An UnfailingPullProvider is a subtype where the methods throw no checked Exceptions.

    • Method Detail

      • current

        PullEvent current()
        Description copied from interface: PullProvider
        Get the event most recently returned by next(), or by other calls that change the position, for example getStringValue() and skipToMatchingEnd(). This method does not change the position of the PullProvider.
        Specified by:
        current in interface PullProvider
        Returns:
        the current event

      • getAttributes

        AttributeMap getAttributes()
        Description copied from interface: PullProvider
        Get the attributes associated with the current element. This method must be called only after a START_ELEMENT event has been notified. The contents of the returned AttributeMap are immutable.

        Attributes may be read before or after reading the namespaces of an element, but must not be read after the first child node has been read, or after calling one of the methods skipToMatchingEnd(), getStringValue(), or getTypedValue().

        Specified by:
        getAttributes in interface PullProvider
        Returns:
        an AttributeMap representing the attributes of the element that has just been notified.

      • getNamespaceDeclarations

        NamespaceBinding[] getNamespaceDeclarations()
        Description copied from interface: PullProvider
        Get the namespace declarations associated with the current element. This method must be called only after a START_ELEMENT event has been notified. In the case of a top-level START_ELEMENT event (that is, an element that either has no parent node, or whose parent is not included in the sequence being read), the NamespaceDeclarations object returned will contain a namespace declaration for each namespace that is in-scope for this element node. In the case of a non-top-level element, the NamespaceDeclarations will contain a set of namespace declarations and undeclarations, representing the differences between this element and its parent.

        It is permissible for this method to return namespace declarations that are redundant.

        The NamespaceDeclarations object is guaranteed to remain unchanged until the next START_ELEMENT event, but may then be overwritten. The object should not be modified by the client.

        Namespaces may be read before or after reading the attributes of an element, but must not be read after the first child node has been read, or after calling one of the methods skipToMatchingEnd(), getStringValue(), or getTypedValue().

        Specified by:
        getNamespaceDeclarations in interface PullProvider
        Returns:
        the namespace declarations associated with the current START_ELEMENT event.

      • skipToMatchingEnd

        PullEvent skipToMatchingEnd()
        Description copied from interface: PullProvider
        Skip the current subtree. This method may be called only immediately after a START_DOCUMENT or START_ELEMENT event. This call returns the matching END_DOCUMENT or END_ELEMENT event; the next call on next() will return the event following the END_DOCUMENT or END_ELEMENT.
        Specified by:
        skipToMatchingEnd in interface PullProvider
        Returns:
        the matching END_DOCUMENT or END_ELEMENT event

      • close

        void close()
        Description copied from interface: PullProvider
        Close the event reader. This indicates that no further events are required. It is not necessary to close an event reader after PullEvent.END_OF_INPUT has been reported, but it is recommended to close it if reading terminates prematurely. Once an event reader has been closed, the effect of further calls on next() is undefined.
        Specified by:
        close in interface PullProvider

      • getNodeName

        NodeName getNodeName()
        Description copied from interface: PullProvider
        Get the NodeName identifying the name of the current node. This method can be used after the PullEvent.START_ELEMENT, PullEvent.PROCESSING_INSTRUCTION, PullEvent.ATTRIBUTE, or PullEvent.NAMESPACE events. With some PullProvider implementations, it can also be used after PullEvent.END_ELEMENT, but this is not guaranteed. If called at other times, the result is undefined and may result in an IllegalStateException. If called when the current node is an unnamed namespace node (a node representing the default namespace) the returned value is null.
        Specified by:
        getNodeName in interface PullProvider
        Returns:
        the NodeName. The NodeName can be used to obtain the prefix, local name, and namespace URI.

      • getStringValue

        UnicodeString getStringValue()
                      throws XPathException
        Description copied from interface: PullProvider
        Get the string value of the current element, text node, processing-instruction, or top-level attribute or namespace node, or atomic value.

        In other situations the result is undefined and may result in an IllegalStateException.

        If the most recent event was a PullEvent.START_ELEMENT, this method causes the content of the element to be read. The current event on completion of this method will be the corresponding PullEvent.END_ELEMENT. The next call of next() will return the event following the END_ELEMENT event.

        Specified by:
        getStringValue in interface PullProvider
        Returns:
        the String Value of the node in question, defined according to the rules in the XPath data model.
        Throws:
        XPathException - if a dynamic error occurs

      • getSchemaType

        SchemaType getSchemaType()
        Description copied from interface: PullProvider
        Get the type annotation of the current attribute or element node, or atomic value. The result of this method is undefined unless the most recent event was START_ELEMENT, ATTRIBUTE, or ATOMIC_VALUE.
        Specified by:
        getSchemaType in interface PullProvider
        Returns:
        the type annotation.

      • getAtomicValue

        AtomicValue getAtomicValue()
        Description copied from interface: PullProvider
        Get an atomic value. This call may be used only when the last event reported was ATOMIC_VALUE. This indicates that the PullProvider is reading a sequence that contains a free-standing atomic value; it is never used when reading the content of a node.
        Specified by:
        getAtomicValue in interface PullProvider
        Returns:
        the atomic value

      • getSourceLocator

        Location getSourceLocator()
        Description copied from interface: PullProvider
        Get the location of the current event. For an event stream representing a real document, the location information should identify the location in the lexical XML source. For a constructed document, it should identify the location in the query or stylesheet that caused the node to be created. A value of null can be returned if no location information is available.
        Specified by:
        getSourceLocator in interface PullProvider
        Returns:
        the SourceLocator giving the location of the current event, or null if no location information is available

      • getUnparsedEntities

        java.util.List<UnparsedEntity> getUnparsedEntities()
        Description copied from interface: PullProvider
        Get a list of unparsed entities.
        Specified by:
        getUnparsedEntities in interface PullProvider
        Returns:
        a list of unparsed entities, or null if the information is not available, or an empty list if there are no unparsed entities. Each item in the list will be an instance of UnparsedEntity