X-Git-Url: https://git.argeo.org/?a=blobdiff_plain;f=server%2Fplugins%2Forg.argeo.jcr.ui.explorer%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2Fjcr%2Fui%2Fexplorer%2Fmodel%2FSingleJcrNode.java;fp=server%2Fplugins%2Forg.argeo.jcr.ui.explorer%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2Fjcr%2Fui%2Fexplorer%2Fmodel%2FSingleJcrNode.java;h=03ac5222661cd4771d2435d6702f52ed5377a3ea;hb=c0b7b3f9d1781d074ab35d24017042fa9415e1e4;hp=0000000000000000000000000000000000000000;hpb=ed36fb56ac5aff2d606b35be175eb32657d6ec56;p=lgpl%2Fargeo-commons.git

diff --git a/server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/model/SingleJcrNode.java b/server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/model/SingleJcrNode.java
new file mode 100644
index 000000000..03ac52226
--- /dev/null
+++ b/server/plugins/org.argeo.jcr.ui.explorer/src/main/java/org/argeo/jcr/ui/explorer/model/SingleJcrNode.java
@@ -0,0 +1,103 @@
+package org.argeo.jcr.ui.explorer.model;
+
+import javax.jcr.Node;
+import javax.jcr.NodeIterator;
+import javax.jcr.RepositoryException;
+import javax.jcr.Workspace;
+
+import org.argeo.ArgeoException;
+import org.argeo.eclipse.ui.TreeParent;
+
+/**
+ * UI Tree component. Wraps a node of a JCR {@link Workspace}. It also keeps a
+ * reference to its parent node that can either be a {@link WorkspaceNode}, a
+ * {@link SingleJcrNode} or null if the node is "mounted" as the root of the UI
+ * tree.
+ */
+
+public class SingleJcrNode extends TreeParent implements UiNode {
+
+	private final Node node;
+	private String alias = null;
+
+	// keeps a local reference to the node's name to avoid exception when the
+	// session is lost
+	// private final String name;
+
+	/** Creates a new UiNode in the UI Tree */
+	public SingleJcrNode(TreeParent parent, Node node, String name) {
+		super(name);
+		setParent(parent);
+		this.node = node;
+	}
+
+	/**
+	 * Creates a new UiNode in the UI Tree, keeping a reference to the alias of
+	 * the corresponding repository in the current UI environment. It is useful
+	 * to be able to mount nodes as roots of the UI tree.
+	 */
+	public SingleJcrNode(TreeParent parent, Node node, String name, String alias) {
+		super(name);
+		setParent(parent);
+		this.node = node;
+		this.alias = alias;
+	}
+
+	/** returns the node wrapped by the current Ui object */
+	public Node getNode() {
+		return node;
+	}
+
+	/**
+	 * Returns the alias corresponding to the repository abstraction that
+	 * contains current node. If the current object is mounted as root of the UI
+	 * tree, the alias is stored in the object. Otherwise, we must browse the
+	 * tree backward to the RepositoryNode.
+	 * 
+	 * Alias is then cached in the current object so that next time it will be
+	 * here.
+	 */
+	public String getAlias() {
+		if (alias == null) {
+			alias = ((UiNode) getParent()).getAlias();
+		}
+		return alias;
+	}
+
+	/**
+	 * Override normal behaviour to initialize children only when first
+	 * requested
+	 */
+	@Override
+	public synchronized Object[] getChildren() {
+		if (isLoaded()) {
+			return super.getChildren();
+		} else {
+			// initialize current object
+			try {
+				NodeIterator ni = node.getNodes();
+				while (ni.hasNext()) {
+					Node curNode = ni.nextNode();
+					addChild(new SingleJcrNode(this, curNode, curNode.getName()));
+				}
+				return super.getChildren();
+			} catch (RepositoryException re) {
+				throw new ArgeoException(
+						"Unexcpected error while initializing children SingleJcrNode",
+						re);
+			}
+		}
+	}
+
+	@Override
+	public boolean hasChildren() {
+		try {
+			return node.hasNodes();
+		} catch (RepositoryException re) {
+			throw new ArgeoException(
+					"Unexpected error while checking children node existence",
+					re);
+		}
+	}
+
+}