Class TreeNodeFactory


  • public class TreeNodeFactory
    extends java.lang.Object
    A factory that creates TreeNode objects corresponding with PDF objects.
    • Field Detail

      • nodes

        protected java.util.ArrayList<PdfObjectTreeNode> nodes
        An list containing the nodes of every indirect object.
    • Constructor Detail

      • TreeNodeFactory

        public TreeNodeFactory​(IndirectObjectFactory objects)
        Creates a factory that can produce TreeNode objects corresponding with PDF objects.
        Parameters:
        objects - a factory that can produce all the indirect objects of a PDF file.
    • Method Detail

      • getNode

        public PdfObjectTreeNode getNode​(int ref)
        Gets a TreeNode for an indirect objects.
        Parameters:
        ref - the reference number of the indirect object.
        Returns:
        the TreeNode representing the PDF object
      • expandNode

        public void expandNode​(PdfObjectTreeNode node)
        Creates the Child TreeNode objects for a PDF object TreeNode.
        Parameters:
        node - the parent node
      • getChildNode

        public PdfObjectTreeNode getChildNode​(PdfObjectTreeNode node,
                                              PdfName key)
        Finds a specific child of dictionary node.
        Parameters:
        node - the node with a dictionary among its children
        key - the key of the item corresponding with the node we need
        Returns:
        the PdfObjectTreeNode that is the child of the dictionary node
      • addNodes

        private void addNodes​(PdfObjectTreeNode parent,
                              PdfObjectTreeNode child)
        Tries adding a child node to a parent node without throwing an exception. Normally, if the child node is already added as one of the ancestors, an IllegalArgumentException is thrown (to avoid an endless loop). Loops like this are allowed in PDF, not in a JTree.
        Parameters:
        parent - the parent node
        child - a child node