From 83ef626b9f83190a67ba94709d2f2009626813f6 Mon Sep 17 00:00:00 2001
From: Mathieu Baudier <mbaudier@argeo.org>
Date: Fri, 4 Mar 2011 16:31:19 +0000
Subject: [PATCH] Introduce generic JCR tree content providers

git-svn-id: https://svn.argeo.org/commons/trunk@4270 4cfe0d0a-d680-48aa-b62c-e0a02a3f76cc
---
 .../ui/jcr/AbstractNodeContentProvider.java   | 83 +++++++++++++++++++
 .../ui/jcr/SimpleNodeContentProvider.java     | 58 +++++++++++++
 2 files changed, 141 insertions(+)
 create mode 100644 eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/AbstractNodeContentProvider.java
 create mode 100644 eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/SimpleNodeContentProvider.java

diff --git a/eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/AbstractNodeContentProvider.java b/eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/AbstractNodeContentProvider.java
new file mode 100644
index 000000000..a8d07ad67
--- /dev/null
+++ b/eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/AbstractNodeContentProvider.java
@@ -0,0 +1,83 @@
+package org.argeo.eclipse.ui.jcr;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import javax.jcr.Node;
+import javax.jcr.NodeIterator;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+
+import org.argeo.ArgeoException;
+import org.argeo.eclipse.ui.AbstractTreeContentProvider;
+
+/** Canonic implementation of tree content provider manipulating JCR nodes. */
+public abstract class AbstractNodeContentProvider extends
+		AbstractTreeContentProvider {
+	private Session session;
+
+	public AbstractNodeContentProvider(Session session) {
+		this.session = session;
+	}
+
+	/**
+	 * Whether this path is a base path (and thus has no parent). By default it
+	 * returns true if path is '/' (root node)
+	 */
+	protected Boolean isBasePath(String path) {
+		// root node
+		return path.equals("/");
+	}
+
+	@Override
+	public Object[] getChildren(Object element) {
+		if (element instanceof Node) {
+			try {
+				List<Node> nodes = new ArrayList<Node>();
+				for (NodeIterator nit = ((Node) element).getNodes(); nit
+						.hasNext();)
+					nodes.add(nit.nextNode());
+				return nodes.toArray();
+			} catch (RepositoryException e) {
+				throw new ArgeoException("Cannot get children of " + element, e);
+			}
+		} else {
+			return super.getChildren(element);
+		}
+	}
+
+	@Override
+	public Object getParent(Object element) {
+		if (element instanceof Node) {
+			Node node = (Node) element;
+			try {
+				String path = node.getPath();
+				if (isBasePath(path))
+					return null;
+				else
+					return node.getParent();
+			} catch (RepositoryException e) {
+				throw new ArgeoException("Cannot get parent of " + element, e);
+			}
+		}
+		return super.getParent(element);
+	}
+
+	@Override
+	public boolean hasChildren(Object element) {
+		if (element instanceof Node) {
+			Node node = (Node) element;
+			try {
+				return node.hasNodes();
+			} catch (RepositoryException e) {
+				throw new ArgeoException("Cannot check whether " + element
+						+ " has children", e);
+			}
+		}
+		return super.hasChildren(element);
+	}
+
+	public Session getSession() {
+		return session;
+	}
+}
diff --git a/eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/SimpleNodeContentProvider.java b/eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/SimpleNodeContentProvider.java
new file mode 100644
index 000000000..6c827df28
--- /dev/null
+++ b/eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/SimpleNodeContentProvider.java
@@ -0,0 +1,58 @@
+package org.argeo.eclipse.ui.jcr;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+
+import org.argeo.ArgeoException;
+import org.argeo.jcr.JcrUtils;
+
+/** Simple JCR node content provider taking a list of String as base path. */
+public class SimpleNodeContentProvider extends AbstractNodeContentProvider {
+	private final List<String> basePaths;
+	private Boolean mkdirs = false;
+
+	public SimpleNodeContentProvider(Session session, String... basePaths) {
+		this(session, Arrays.asList(basePaths));
+	}
+
+	public SimpleNodeContentProvider(Session session, List<String> basePaths) {
+		super(session);
+		this.basePaths = basePaths;
+	}
+
+	@Override
+	protected Boolean isBasePath(String path) {
+		if (basePaths.contains(path))
+			return true;
+		return super.isBasePath(path);
+	}
+
+	public Object[] getElements(Object inputElement) {
+		try {
+			List<Node> baseNodes = new ArrayList<Node>();
+			for (String basePath : basePaths)
+				if (mkdirs && !getSession().itemExists(basePath))
+					baseNodes.add(JcrUtils.mkdirs(getSession(), basePath));
+				else
+					baseNodes.add(getSession().getNode(basePath));
+			return baseNodes.toArray();
+		} catch (RepositoryException e) {
+			throw new ArgeoException("Cannot get base nodes for " + basePaths,
+					e);
+		}
+	}
+
+	public List<String> getBasePaths() {
+		return basePaths;
+	}
+
+	public void setMkdirs(Boolean mkdirs) {
+		this.mkdirs = mkdirs;
+	}
+
+}
-- 
2.30.2