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* Constructor with explicit parameters, for calling * as an application * * @param host host name of directory server * @param port port number of directory server * @param base base DN of DIT to display */ public DirBrowser( String host, int port, String base ) { thishost = host; thisport = port; thisbase = base; isApplet = false; }
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/** * Standard applet entry point; create the tree view */ public void init() { /* Get parameters from applet tags if present */ String s = getParameter( "host" ); if ( (s != null) && (slength() > 0) ) { host = s; } s = getParameter( "base" ); if ( (s != null) && (slength() > 0) ) { base = s; } s = getParameter( "port" ); if ( (s != null) && (slength() > 0) ) { port = IntegerparseInt( s ); } /* Create the root of the tree and get the entries beneath the root */ DefaultMutableTreeNode root = new DefaultMutableTreeNode( base ); addChildren( root ); /* Set up the area for displaying attributes */ attributeListing = new JTextArea(); attributeListingsetEditable(false); JScrollPane attributePane = new JScrollPane(attributeListing); attributePanesetVerticalScrollBarPolicy( JScrollPaneVERTICAL_SCROLLBAR_ALWAYS); attributePanesetHorizontalScrollBarPolicy(
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JScrollPaneHORIZONTAL_SCROLLBAR_ALWAYS); Dimension dim = new Dimension(300, 150); attributePanesetMinimumSize(dim); attributePanesetPreferredSize(dim); /* Create the tree for displaying entries in the directory hierarchy */ final JTree tree = new JTree( root ); treegetSelectionModel()setSelectionMode (TreeSelectionModelSINGLE_TREE_SELECTION); treeaddTreeExpansionListener( new TreeExpansionListener() { /* If the tree is expanded, get the children of the expanded entry */ public void treeExpanded(TreeExpansionEvent e) { DefaultMutableTreeNode entry = (DefaultMutableTreeNode) egetPath()getLastPathComponent(); addChildren(entry); } public void treeCollapsed(TreeExpansionEvent e) { } }); treeaddTreeSelectionListener( new TreeSelectionListener() { /* If a node or leaf is selected, display the attributes of that entry */ public void valueChanged(TreeSelectionEvent e) { DefaultMutableTreeNode entry = (DefaultMutableTreeNode) egetNewLeadSelectionPath() getLastPathComponent(); String attributeString = flattenAttributes(entry); attributeListingsetText(attributeString); attributeListingsetCaretPosition(0); } }); JScrollPane treeView = new JScrollPane(tree); dim = new Dimension(300, 150); treeViewsetMinimumSize(dim); treeViewsetPreferredSize(dim); /* Set up the tree and text area components in a split pane */ JSplitPane twoPanes =
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new JSplitPane(JSplitPaneVERTICAL_SPLIT); twoPanessetTopComponent(treeView); twoPanessetBottomComponent(attributePane); twoPanessetDividerLocation(150); /* Add the split pane to the main content pane */ getContentPane()add(twoPanes, BorderLayoutCENTER); } /** * Display the entries one level * below a selected entry The parent argument * identifies the node to be expanded */ protected void addChildren( DefaultMutableTreeNode parent ) { DefaultMutableTreeNode entry = null; DefaultMutableTreeNode subEntry = null; LDAPEntry childEntry, grandchildEntry; String childEntryDN; try { LDAPConnection conn = getConnection(); if ( conn == null ) { return; } /* Get only the cn attribute */ String[] attrNames = { "cn" }; /* If the node is the root node, query the directory to get the child entries*/ if ( parentisRoot() ) { /* Search all entries that are one level below the current entry*/ LDAPSearchResults results = connsearch( base, connSCOPE_ONE, "(objectclass=*)", attrNames, false ); /* Get the DN for each result, and use the DN as the string value of the node */ while ( resultshasMoreElements() ) { childEntry = resultsnext(); entry = new DefaultMutableTreeNode(
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childEntrygetDN()); /* Add the new node as a child of the top-level node */ parentadd(entry); /* Search for entries that are one level beneath the child entry to determine if the child entry is a leaf or a node*/ LDAPSearchResults resUnderEntry = connsearch( childEntrygetDN(), connSCOPE_ONE, "(objectclass=*)", attrNames, false ); /* Get the DN of each result and add the DN as a "grandchild" node under the child node*/ while (resUnderEntryhasMoreElements()) { grandchildEntry = resUnderEntrynext(); subEntry = new DefaultMutableTreeNode( grandchildEntrygetDN()); entryadd(subEntry); } } /* If the node passed in is not the root node, the child entries (in the tree) should already exist (from the previous query) Use the tree hierarchy to get the child entries, and then query each child entry to get the "grandchild" entries (This determines whether or not the child entry is a leaf or a node) */ } else { /* Get the child entries in the tree */ Enumeration childEntries = parentchildren(); while (childEntrieshasMoreElements()) { entry = (DefaultMutableTreeNode) childEntriesnextElement(); /* Each existing child entry in the tree contains the DN of that entry Get the DN */ childEntryDN = (String)entrygetUserObject(); /* Use this "child" DN to find the
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