--- /dev/null
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.argeo.jcr.ui.explorer.utils;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+
+import org.argeo.ArgeoException;
+import org.argeo.eclipse.ui.TreeParent;
+import org.argeo.jcr.ui.explorer.model.RepositoriesElem;
+import org.argeo.jcr.ui.explorer.model.RepositoryElem;
+import org.argeo.jcr.ui.explorer.model.SingleJcrNodeElem;
+import org.argeo.jcr.ui.explorer.model.WorkspaceElem;
+
+/** Centralizes some useful methods to build UIs with JCR */
+public class JcrUiUtils {
+
+ /** Insure that the UI component is not stale, refresh if needed */
+ public static void forceRefreshIfNeeded(TreeParent element) {
+ Node curNode = null;
+
+ boolean doRefresh = false;
+
+ try {
+ if (element instanceof SingleJcrNodeElem) {
+ curNode = ((SingleJcrNodeElem) element).getNode();
+ } else if (element instanceof WorkspaceElem) {
+ curNode = ((WorkspaceElem) element).getRootNode();
+ }
+
+ if (curNode != null
+ && element.getChildren().length != curNode.getNodes()
+ .getSize())
+ doRefresh = true;
+ else if (element instanceof RepositoryElem) {
+ RepositoryElem rn = (RepositoryElem) element;
+ if (rn.isConnected()) {
+ String[] wkpNames = rn.getAccessibleWorkspaceNames();
+ if (element.getChildren().length != wkpNames.length)
+ doRefresh = true;
+ }
+ } else if (element instanceof RepositoriesElem) {
+ doRefresh = true;
+ // Always force refresh for RepositoriesElem : the condition
+ // below does not take remote repository into account and it is
+ // not trivial to do so.
+
+ // RepositoriesElem rn = (RepositoriesElem) element;
+ // if (element.getChildren().length !=
+ // rn.getRepositoryRegister()
+ // .getRepositories().size())
+ // doRefresh = true;
+ }
+ if (doRefresh) {
+ element.clearChildren();
+ element.getChildren();
+ }
+ } catch (RepositoryException re) {
+ throw new ArgeoException(
+ "Unexpected error while synchronising the UI with the JCR repository",
+ re);
+ }
+ }
+
+ /**
+ * Insure that a model element is inline with the underlying data by
+ * cleaning the corresponding subtree and building it again.
+ */
+ public static void forceRebuild(TreeParent element) {
+ // TODO implement this method if needed.
+ }
+ /**
+ * Workaround to get the alias of the repository that contains the given
+ * element. As we cannot browse the UI tree upward we recursively browse it
+ * downward until we find the given element
+ * */
+ // public static String getRepositoryAliasFromITreeElement(
+ // NodeContentProvider ncp, Object element) {
+ // RepositoryNode repositoryNode = null;
+ // if (element instanceof RepositoryNode)
+ // return ((RepositoryNode) element).getName();
+ // else if (element instanceof RepositoryRegister)
+ // throw new ArgeoException(
+ // "Cannot get alias for a repository register");
+ //
+ // // Get root elements
+ // Object[] elements = ncp.getElements(null);
+ //
+ // try {
+ // for (int i = 0; i < elements.length; i++) {
+ // if (elements[i] instanceof Node) {
+ // Node curNode = (Node) elements[i];
+ // if (curNode.isNodeType(ArgeoTypes.ARGEO_USER_HOME)) {
+ // // Do nothing, we'll find the node in the "normal" tree
+ // // and
+ // // get corresponding alias this way round
+ // } else
+ // throw new ArgeoException(
+ // "Normal nodes should not be at the root of NodeTreeViewer");
+ // } else if (elements[i] instanceof RepositoryRegister) {
+ // RepositoryRegister repositoryRegister = (RepositoryRegister) elements[i];
+ // Map<String, Repository> repositories = repositoryRegister
+ // .getRepositories();
+ //
+ // for (String name : repositories.keySet()) {
+ // boolean found = isElementInCurrentTreePart(
+ // ncp,
+ // new RepositoryNode(name, repositories.get(name)),
+ // (Node) element);
+ // if (found)
+ // return name;
+ // }
+ // } else
+ // throw new ArgeoException(
+ // "Unexpected object class at the root of NodeTreeViewer");
+ // }
+ // } catch (RepositoryException re) {
+ // throw new ArgeoException(
+ // "Unexpected error while retrieving Alias name", re);
+ // }
+ // return null;
+ // }
+ //
+ // /** implements the recursivity */
+ // private static boolean isElementInCurrentTreePart(NodeContentProvider
+ // ncp,
+ // Object parentElement, NodParente searchedElement) {
+ // boolean found = false;
+ // if (parentElement instanceof WorkspaceNode) {
+ // WorkspaceNode wn = (WorkspaceNode) parentElement;
+ // Object[] children = wn.getChildren();
+ // int i = children.length - 1;
+ // while (!found && i >= 0) {
+ // found = isElementInCurrentTreePart(ncp, children[i],
+ // searchedElement);
+ // }
+ // return found;
+ // } else if (parentElement instanceof RepositoryNode) {
+ // RepositoryNode rn = (RepositoryNode) parentElement;
+ // Object[] children = rn.getChildren();
+ // int i = children.length - 1;
+ // while (!found && i >= 0) {
+ // found = isElementInCurrentTreePart(ncp, children[i],
+ // searchedElement);
+ // }
+ // return found;
+ // } else {
+ // Node node = (Node) parentElement;
+ // if (node.equals(searchedElement))
+ // return true;
+ // NodeIterator ni;
+ // try {
+ // ni = node.getNodes();
+ // while (!found && ni.hasNext()) {
+ // found = isElementInCurrentTreePart(ncp, ni.nextNode(),
+ // searchedElement);
+ // }
+ // } catch (RepositoryException e) {
+ // throw new ArgeoException("unexpected erreur while recursively"
+ // + " recovering RepositoryNode for selected object", e);
+ // }
+ //
+ // return found;
+ // }
+ // }
+}
projects / lgpl / argeo-commons.git / blobdiff