File	Doc	Category	Size	Date	Package
TreeReaderListener.java	API Doc	Apache Poi 3.0.1	8809	Mon Jan 01 12:39:34 GMT 2007	org.apache.poi.contrib.poibrowser

TreeReaderListener

• java.lang.Object

Fields Summary
protected MutableTreeNode	rootNode The tree's root node. POI filesystems get attached to this node as children.
protected Map	pathToNode Maps filenames and POI document paths to their associated tree nodes.
protected String	filename The name of the file this {@link TreeReaderListener} processes. It is used to identify a top-level element in the tree. Alternatively any other string can be used. It is just a label which should identify a POI filesystem.
private int	nrOfBytes The number of bytes to dump.

Constructors Summary

public TreeReaderListener(String filename, MutableTreeNode rootNode) Creates a {@link TreeReaderListener} which should then be registered with a {@link org.apache.poi.poifs.eventfilesystem.POIFSReader}. param filename The name of the POI filesystem, i.e. the name of the file the POI filesystem resides in. Alternatively any other string can be used. param rootNode All document information will be attached as descendands to this tree node. this.filename = filename; this.rootNode = rootNode; pathToNode = new HashMap(15); // Should be a reasonable guess.

Methods Summary
private javax.swing.tree.MutableTreeNode	getNode(org.apache.poi.poifs.filesystem.POIFSDocumentPath path, java.lang.String fsName, javax.swing.tree.MutableTreeNode root) Locates the parent node for a document entry in the tree model. If the parent node does not yet exist it will be created, too. This is done recursively, if needed. param path The tree node for this path is located. param fsName The name of the POI filesystem. This is just a string which is displayed in the tree at the top lovel. param root The root node. MutableTreeNode n = (MutableTreeNode) pathToNode.get(path); if (n != null) /* Node found in map, just return it. */ return n; if (path.length() == 0) { /* This is the root path of the POI filesystem. Its tree * node is resp. must be located below the tree node of * the POI filesystem itself. This is a tree node with the * POI filesystem's name (this the operating system file's * name) as its key it the path-to-node map. */ n = (MutableTreeNode) pathToNode.get(fsName); if (n == null) { /* A tree node for the POI filesystem does not yet * exist. */ n = new DefaultMutableTreeNode(fsName); pathToNode.put(fsName, n); root.insert(n, 0); } return n; } else { /* The path is somewhere down in the POI filesystem's * hierarchy. We need the tree node of this path's parent * and attach our new node to it. */ final String name = path.getComponent(path.length() - 1); final POIFSDocumentPath parentPath = path.getParent(); final MutableTreeNode parentNode = getNode(parentPath, fsName, root); n = new DefaultMutableTreeNode(name); pathToNode.put(path, n); parentNode.insert(n, 0); return n; }
public int	getNrOfBytes() return nrOfBytes;
public void	processPOIFSReaderEvent(org.apache.poi.poifs.eventfilesystem.POIFSReaderEvent event) A document in the POI filesystem has been opened for reading. This method retrieves properties of the document and adds them to a tree model. DocumentDescriptor d; final DocumentInputStream is = event.getStream(); if (!is.markSupported()) throw new UnsupportedOperationException(is.getClass().getName() + " does not support mark()."); /* Try do handle this document as a property set. We receive * an exception if is no property set and handle it as a * document of some other format. We are not concerned about * that document's details. */ try { d = new PropertySetDescriptor(event.getName(), event.getPath(), is, nrOfBytes); } catch (HPSFException ex) { d = new DocumentDescriptor(event.getName(), event.getPath(), is, nrOfBytes); } catch (Throwable t) { System.err.println ("Unexpected exception while processing " + event.getName() + " in " + event.getPath().toString()); t.printStackTrace(System.err); throw new RuntimeException(t.getMessage()); } try { is.close(); } catch (IOException ex) { System.err.println ("Unexpected exception while closing " + event.getName() + " in " + event.getPath().toString()); ex.printStackTrace(System.err); } final MutableTreeNode parentNode = getNode(d.path, filename, rootNode); final MutableTreeNode nameNode = new DefaultMutableTreeNode(d.name); parentNode.insert(nameNode, 0); final MutableTreeNode dNode = new DefaultMutableTreeNode(d); nameNode.insert(dNode, 0);
public void	setNrOfBytes(int nrOfBytes) this.nrOfBytes = nrOfBytes;