X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=jcr%2Forg.argeo.cms.ui%2Fsrc%2Forg%2Fargeo%2Fcms%2Fui%2Fwidgets%2FJcrComposite.java;fp=jcr%2Forg.argeo.cms.ui%2Fsrc%2Forg%2Fargeo%2Fcms%2Fui%2Fwidgets%2FJcrComposite.java;h=5d3576f2719cc1edc05208cc6685053d2125eb94;hb=8282011b0e20e80704b209ad55fa9fb132e16280;hp=0000000000000000000000000000000000000000;hpb=633a8acd189cc22f06944d278879601189be1bc8;p=lgpl%2Fargeo-commons.git

diff --git a/jcr/org.argeo.cms.ui/src/org/argeo/cms/ui/widgets/JcrComposite.java b/jcr/org.argeo.cms.ui/src/org/argeo/cms/ui/widgets/JcrComposite.java
new file mode 100644
index 000000000..5d3576f27
--- /dev/null
+++ b/jcr/org.argeo.cms.ui/src/org/argeo/cms/ui/widgets/JcrComposite.java
@@ -0,0 +1,213 @@
+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;
+	}
+}