--- /dev/null
+package org.argeo.cms.ui.widgets;
+
+import javax.jcr.Item;
+import javax.jcr.ItemNotFoundException;
+import javax.jcr.Node;
+import javax.jcr.Property;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+
+import org.argeo.cms.swt.CmsSwtUtils;
+import org.argeo.jcr.JcrException;
+import org.eclipse.swt.widgets.Composite;
+
+/** A composite which can (optionally) manage a JCR Item. */
+public class JcrComposite extends Composite {
+ private static final long serialVersionUID = -1447009015451153367L;
+
+ private Session session;
+
+ private String nodeId;
+ private String property = null;
+ private Node cache;
+
+ /** Regular composite constructor. No layout is set. */
+ public JcrComposite(Composite parent, int style) {
+ super(parent, style);
+ session = null;
+ nodeId = null;
+ }
+
+ public JcrComposite(Composite parent, int style, Item item) {
+ this(parent, style, item, false);
+ }
+
+ public JcrComposite(Composite parent, int style, Item item, boolean cacheImmediately) {
+ super(parent, style);
+ if (item != null)
+ try {
+ this.session = item.getSession();
+// if (!cacheImmediately && (SWT.READ_ONLY == (style & SWT.READ_ONLY))) {
+// // (useless?) optimization: we only save a pointer to the session,
+// // not even a reference to the item
+// this.nodeId = null;
+// } else {
+ Node node;
+ Property property = null;
+ if (item instanceof Node) {
+ node = (Node) item;
+ } else {// Property
+ property = (Property) item;
+ if (property.isMultiple())// TODO manage property index
+ throw new UnsupportedOperationException("Multiple properties not supported yet.");
+ this.property = property.getName();
+ node = property.getParent();
+ }
+ this.nodeId = node.getIdentifier();
+ if (cacheImmediately)
+ this.cache = node;
+// }
+ setLayout(CmsSwtUtils.noSpaceGridLayout());
+ } catch (RepositoryException e) {
+ throw new IllegalStateException("Cannot create composite from " + item, e);
+ }
+ }
+
+ public synchronized Node getNode() {
+ try {
+ if (!itemIsNode())
+ throw new IllegalStateException("Item is not a Node");
+ return getNodeInternal();
+ } catch (RepositoryException e) {
+ throw new JcrException("Cannot get node " + nodeId, e);
+ }
+ }
+
+ private synchronized Node getNodeInternal() throws RepositoryException {
+ if (cache != null)
+ return cache;
+ else if (session != null)
+ if (nodeId != null)
+ return session.getNodeByIdentifier(nodeId);
+ else
+ return null;
+ else
+ return null;
+ }
+
+ public synchronized String getPropertyName() {
+ try {
+ return getProperty().getName();
+ } catch (RepositoryException e) {
+ throw new JcrException("Cannot get property name", e);
+ }
+ }
+
+ public synchronized Node getPropertyNode() {
+ try {
+ return getProperty().getNode();
+ } catch (RepositoryException e) {
+ throw new JcrException("Cannot get property name", e);
+ }
+ }
+
+ public synchronized Property getProperty() {
+ try {
+ if (itemIsNode())
+ throw new IllegalStateException("Item is not a Property");
+ Node node = getNodeInternal();
+ if (!node.hasProperty(property))
+ throw new IllegalStateException("Property " + property + " is not set on " + node);
+ return node.getProperty(property);
+ } catch (RepositoryException e) {
+ throw new JcrException("Cannot get property " + property + " from node " + nodeId, e);
+ }
+ }
+
+ public synchronized boolean itemIsNode() {
+ return property == null;
+ }
+
+ public synchronized boolean itemExists() {
+ if (session == null)
+ return false;
+ try {
+ Node n = session.getNodeByIdentifier(nodeId);
+ if (!itemIsNode())
+ return n.hasProperty(property);
+ else
+ return true;
+ } catch (ItemNotFoundException e) {
+ return false;
+ } catch (RepositoryException e) {
+ throw new JcrException("Cannot check whether node exists", e);
+ }
+ }
+
+ /** Set/update the cache or change the node */
+ public synchronized void setNode(Node node) {
+ if (!itemIsNode())
+ throw new IllegalArgumentException("Cannot set a Node on a Property");
+
+ if (node == null) {// clear cache
+ this.cache = null;
+ return;
+ }
+
+ try {
+// if (session != null || session != node.getSession())// check session
+// throw new IllegalArgumentException("Uncompatible session");
+// if (session == null)
+ session = node.getSession();
+ if (nodeId == null || !nodeId.equals(node.getIdentifier())) {
+ nodeId = node.getIdentifier();
+ cache = node;
+ itemUpdated();
+ } else {
+ cache = node;// set/update cache
+ }
+ } catch (RepositoryException e) {
+ throw new IllegalStateException(e);
+ }
+ }
+
+ /** Set/update the cache or change the property */
+ public synchronized void setProperty(Property prop) {
+ if (itemIsNode())
+ throw new IllegalArgumentException("Cannot set a Property on a Node");
+
+ if (prop == null) {// clear cache
+ this.cache = null;
+ return;
+ }
+
+ try {
+ if (session == null || session != prop.getSession())// check session
+ throw new IllegalArgumentException("Uncompatible session");
+
+ Node node = prop.getNode();
+ if (nodeId == null || !nodeId.equals(node.getIdentifier()) || !property.equals(prop.getName())) {
+ nodeId = node.getIdentifier();
+ property = prop.getName();
+ cache = node;
+ itemUpdated();
+ } else {
+ cache = node;// set/update cache
+ }
+ } catch (RepositoryException e) {
+ throw new IllegalStateException(e);
+ }
+ }
+
+ public synchronized String getNodeId() {
+ return nodeId;
+ }
+
+ /** Change the node, does nothing if same. */
+ public synchronized void setNodeId(String nodeId) throws RepositoryException {
+ if (this.nodeId != null && this.nodeId.equals(nodeId))
+ return;
+ this.nodeId = nodeId;
+ if (cache != null)
+ cache = session.getNodeByIdentifier(this.nodeId);
+ itemUpdated();
+ }
+
+ protected synchronized void itemUpdated() {
+ layout();
+ }
+
+// public Session getSession() {
+// return session;
+// }
+}
projects / lgpl / argeo-commons.git / blobdiff