Class NodeSequence

    • Constructor Detail

      • NodeSequence

        public NodeSequence​(java.lang.Object nodeVector)
        Create a new NodeSequence from a (already cloned) iterator.
        Parameters:
        nodeVector -
      • NodeSequence

        public NodeSequence()
        Create a new NodeSequence in an invalid (null) state.
    • Method Detail

      • hasCache

        public boolean hasCache()
        If the iterator needs to cache nodes as they are fetched, then this method returns true.
      • setIter

        public final void setIter​(DTMIterator iter)
        Set the functional iterator that fetches nodes.
        Parameters:
        iter - The iterator that is to be contained.
      • getContainedIter

        public final DTMIterator getContainedIter()
        Get the functional iterator that fetches nodes.
        Returns:
        The contained iterator.
      • getDTM

        public DTM getDTM​(int nodeHandle)
        Description copied from interface: DTMIterator
        Get an instance of a DTM that "owns" a node handle. Since a node iterator may be passed without a DTMManager, this allows the caller to easily get the DTM using just the iterator.
        Specified by:
        getDTM in interface DTMIterator
        Parameters:
        nodeHandle - the nodeHandle.
        Returns:
        a non-null DTM reference.
        See Also:
        DTMIterator.getDTM(int)
      • getDTMManager

        public DTMManager getDTMManager()
        Description copied from interface: DTMIterator
        Get an instance of the DTMManager. Since a node iterator may be passed without a DTMManager, this allows the caller to easily get the DTMManager using just the iterator.
        Specified by:
        getDTMManager in interface DTMIterator
        Returns:
        a non-null DTMManager reference.
        See Also:
        DTMIterator.getDTMManager()
      • getRoot

        public int getRoot()
        Description copied from interface: DTMIterator
        The root node of the DTMIterator, as specified when it was created. Note the root node is not the root node of the document tree, but the context node from where the iteration begins and ends.
        Specified by:
        getRoot in interface DTMIterator
        Returns:
        nodeHandle int Handle of the context node.
        See Also:
        DTMIterator.getRoot()
      • setRoot

        public void setRoot​(int nodeHandle,
                            java.lang.Object environment)
        Description copied from interface: DTMIterator
        Reset the root node of the DTMIterator, overriding the value specified when it was created. Note the root node is not the root node of the document tree, but the context node from where the iteration begins.
        Specified by:
        setRoot in interface DTMIterator
        Parameters:
        nodeHandle - int Handle of the context node.
        environment - The environment object. The environment in which this iterator operates, which should provide:
        • a node (the context node... same value as "root" defined below)
        • a pair of non-zero positive integers (the context position and the context size)
        • a set of variable bindings
        • a function library
        • the set of namespace declarations in scope for the expression.
          • At this time the exact implementation of this environment is application dependent. Probably a proper interface will be created fairly soon.

        See Also:
        DTMIterator.setRoot(int, Object)
      • getWhatToShow

        public int getWhatToShow()
        Description copied from interface: DTMIterator
        This attribute determines which node types are presented via the iterator. The available set of constants is defined above. Nodes not accepted by whatToShow will be skipped, but their children may still be considered.
        Specified by:
        getWhatToShow in interface DTMIterator
        Returns:
        one of the SHOW_XXX constants, or several ORed together.
        See Also:
        DTMIterator.getWhatToShow()
      • getExpandEntityReferences

        public boolean getExpandEntityReferences()
        Description copied from interface: DTMIterator

        The value of this flag determines whether the children of entity reference nodes are visible to the iterator. If false, they and their descendants will be rejected. Note that this rejection takes precedence over whatToShow and the filter.

        To produce a view of the document that has entity references expanded and does not expose the entity reference node itself, use the whatToShow flags to hide the entity reference node and set expandEntityReferences to true when creating the iterator. To produce a view of the document that has entity reference nodes but no entity expansion, use the whatToShow flags to show the entity reference node and set expandEntityReferences to false.

        NOTE: In Xalan's use of DTM we will generally have fully expanded entity references when the document tree was built, and thus this flag will have no effect.

        Specified by:
        getExpandEntityReferences in interface DTMIterator
        Returns:
        true if entity references will be expanded.
        See Also:
        DTMIterator.getExpandEntityReferences()
      • nextNode

        public int nextNode()
        Description copied from interface: DTMIterator
        Returns the next node in the set and advances the position of the iterator in the set. After a DTMIterator has setRoot called, the first call to nextNode() returns that root or (if it is rejected by the filters) the first node within its subtree which is not filtered out.
        Specified by:
        nextNode in interface DTMIterator
        Returns:
        The next node handle in the set being iterated over, or DTM.NULL if there are no more members in that set.
        See Also:
        DTMIterator.nextNode()
      • previousNode

        public int previousNode()
        Description copied from interface: DTMIterator
        Returns the previous node in the set and moves the position of the DTMIterator backwards in the set.
        Specified by:
        previousNode in interface DTMIterator
        Returns:
        The previous node handle in the set being iterated over, or DTM.NULL if there are no more members in that set.
        See Also:
        DTMIterator.previousNode()
      • detach

        public void detach()
        Description copied from class: XObject
        Detaches the DTMIterator from the set which it iterated over, releasing any computational resources and placing the iterator in the INVALID state. After detach has been invoked, calls to nextNode or previousNode will raise a runtime exception.
        Specified by:
        detach in interface DTMIterator
        Overrides:
        detach in class XObject
        See Also:
        DTMIterator.detach()
      • getCurrentNode

        public int getCurrentNode()
        Description copied from interface: DTMIterator
        Get the current node in the iterator. Note that this differs from the DOM's NodeIterator, where the current position lies between two nodes (as part of the maintain-relative-position semantic).
        Specified by:
        getCurrentNode in interface DTMIterator
        Returns:
        The current node handle, or -1.
        See Also:
        DTMIterator.getCurrentNode()
      • isFresh

        public boolean isFresh()
        Description copied from interface: DTMIterator
        Tells if this NodeSetDTM is "fresh", in other words, if the first nextNode() that is called will return the first node in the set.
        Specified by:
        isFresh in interface DTMIterator
        Returns:
        true if the iteration of this list has not yet begun.
        See Also:
        DTMIterator.isFresh()
      • setShouldCacheNodes

        public void setShouldCacheNodes​(boolean b)
        Description copied from interface: DTMIterator
        If setShouldCacheNodes(true) is called, then nodes will be cached, enabling random access, and giving the ability to do sorts and the like. They are not cached by default. %REVIEW% Shouldn't the other random-access methods throw an exception if they're called on a DTMIterator with this flag set false?
        Specified by:
        setShouldCacheNodes in interface DTMIterator
        Parameters:
        b - true if the nodes should be cached.
        See Also:
        DTMIterator.setShouldCacheNodes(boolean)
      • isMutable

        public boolean isMutable()
        Description copied from interface: DTMIterator
        Tells if this iterator can have nodes added to it or set via the setItem(int node, int index) method.
        Specified by:
        isMutable in interface DTMIterator
        Returns:
        True if the nodelist can be mutated.
        See Also:
        DTMIterator.isMutable()
      • getCurrentPos

        public int getCurrentPos()
        Description copied from interface: DTMIterator
        Get the current position within the cached list, which is one less than the next nextNode() call will retrieve. i.e. if you call getCurrentPos() and the return is 0, the next fetch will take place at index 1.
        Specified by:
        getCurrentPos in interface DTMIterator
        Returns:
        The position of the iteration.
        See Also:
        DTMIterator.getCurrentPos()
      • runTo

        public void runTo​(int index)
        Description copied from interface: DTMIterator
        If an index is requested, NodeSetDTM will call this method to run the iterator to the index. By default this sets m_next to the index. If the index argument is -1, this signals that the iterator should be run to the end and completely fill the cache.
        Specified by:
        runTo in interface DTMIterator
        Parameters:
        index - The index to run to, or -1 if the iterator should be run to the end.
        See Also:
        DTMIterator.runTo(int)
      • item

        public int item​(int index)
        Description copied from interface: DTMIterator
        Returns the node handle of an item in the collection. If index is greater than or equal to the number of nodes in the list, this returns null.
        Specified by:
        item in interface DTMIterator
        Parameters:
        index - of the item.
        Returns:
        The node handle at the indexth position in the DTMIterator, or -1 if that is not a valid index.
        See Also:
        DTMIterator.item(int)
      • setItem

        public void setItem​(int node,
                            int index)
        Description copied from interface: DTMIterator
        Sets the node at the specified index of this vector to be the specified node. The previous component at that position is discarded.

        The index must be a value greater than or equal to 0 and less than the current size of the vector. The iterator must be in cached mode.

        Meant to be used for sorted iterators.

        Specified by:
        setItem in interface DTMIterator
        Parameters:
        node - Node to set
        index - Index of where to set the node
        See Also:
        DTMIterator.setItem(int, int)
      • getLength

        public int getLength()
        Description copied from interface: DTMIterator
        The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive. Note that this requires running the iterator to completion, and presumably filling the cache.
        Specified by:
        getLength in interface DTMIterator
        Returns:
        The number of nodes in the list.
        See Also:
        DTMIterator.getLength()
      • clone

        public java.lang.Object clone()
                               throws java.lang.CloneNotSupportedException
        Get a clone of this iterator, but don't reset the iteration in the process, so that it may be used from the current position. Note: Not a deep clone.
        Specified by:
        clone in interface DTMIterator
        Returns:
        A clone of this object.
        Throws:
        java.lang.CloneNotSupportedException
      • isDocOrdered

        public boolean isDocOrdered()
        Description copied from interface: DTMIterator
        Returns true if all the nodes in the iteration well be returned in document order.
        Specified by:
        isDocOrdered in interface DTMIterator
        Returns:
        true if all the nodes in the iteration well be returned in document order.
        See Also:
        DTMIterator.isDocOrdered()
      • getAxis

        public int getAxis()
        Description copied from interface: DTMIterator
        Returns the axis being iterated, if it is known.
        Specified by:
        getAxis in interface DTMIterator
        Returns:
        Axis.CHILD, etc., or -1 if the axis is not known or is of multiple types.
        See Also:
        DTMIterator.getAxis()
      • fixupVariables

        public void fixupVariables​(java.util.Vector vars,
                                   int globalsSize)
        Description copied from class: XObject
        XObjects should not normally need to fix up variables.
        Overrides:
        fixupVariables in class XObject
        Parameters:
        vars - List of QNames that correspond to variables. This list should be searched backwards for the first qualified name that corresponds to the variable reference qname. The position of the QName in the vector from the start of the vector will be its position in the stack frame (but variables above the globalsTop value will need to be offset to the current stack frame). NEEDSDOC @param globalsSize
        See Also:
        Expression.fixupVariables(Vector, int)