From 4299fe97454ee872208438964d6d3a221423f191 Mon Sep 17 00:00:00 2001
From: Bruno Sinou <bsinou@argeo.org>
Date: Wed, 9 Mar 2011 22:43:17 +0000
Subject: [PATCH] -> Finalisation of file download for RAP -> some little UI
 Bugs

git-svn-id: https://svn.argeo.org/commons/trunk@4274 4cfe0d0a-d680-48aa-b62c-e0a02a3f76cc
---
 .../eclipse/ui/jcr/utils/JcrFileProvider.java | 85 +++++++++++++++++++
 .../ui/jcr/utils/NodeViewerComparer.java      | 35 ++++++++
 2 files changed, 120 insertions(+)
 create mode 100644 eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/utils/JcrFileProvider.java
 create mode 100644 eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/utils/NodeViewerComparer.java

diff --git a/eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/utils/JcrFileProvider.java b/eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/utils/JcrFileProvider.java
new file mode 100644
index 000000000..f8de5f3b5
--- /dev/null
+++ b/eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/utils/JcrFileProvider.java
@@ -0,0 +1,85 @@
+package org.argeo.eclipse.ui.jcr.utils;
+
+import java.io.InputStream;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+
+import org.apache.commons.io.IOUtils;
+import org.argeo.ArgeoException;
+import org.argeo.eclipse.ui.jcr.browser.RepositoryNode;
+import org.argeo.eclipse.ui.jcr.browser.WorkspaceNode;
+import org.argeo.eclipse.ui.specific.FileProvider;
+
+/**
+ * Implements a FileProvider for UI purposes. Note that it might not be very
+ * reliable as long as we have not fixed login & multi repository issues that
+ * will be addressed in the next version.
+ * 
+ * We are also very dependant of the repository architecture for file nodes. We
+ * assume the content of the file is stored in a nt:resource child node of the
+ * nt:file in the jcr:data property
+ * 
+ * @author bsinou
+ * 
+ */
+
+public class JcrFileProvider implements FileProvider {
+
+	private RepositoryNode repositoryNode;
+
+	/**
+	 * Must be set in order for the provider to be able to search the repository
+	 * 
+	 * @param repositoryNode
+	 */
+	public void setRepositoryNode(RepositoryNode repositoryNode) {
+		this.repositoryNode = repositoryNode;
+	}
+
+	public byte[] getByteArrayFileFromId(String fileId) {
+		try {
+			Object[] nodes = repositoryNode.getChildren();
+
+			repos: for (int i = 0; i < nodes.length; i++) {
+				WorkspaceNode wNode = (WorkspaceNode) nodes[i];
+				Node node = null;
+				node = wNode.getSession().getNodeByIdentifier(fileId);
+
+				if (node == null)
+					continue repos;
+
+				if (!node.isNodeType("nt:file"))
+					throw new ArgeoException(
+							"Cannot open file children Node that are not of 'nt:resource' type.");
+
+				Node child = node.getNodes().nextNode();
+				if (!child.isNodeType("nt:resource"))
+					throw new ArgeoException(
+							"Cannot open file children Node that are not of 'nt:resource' type.");
+
+				InputStream fis = null;
+				byte[] ba = null;
+				try {
+					fis = (InputStream) child.getProperty("jcr:data")
+							.getBinary().getStream();
+					ba = IOUtils.toByteArray(fis);
+
+				} catch (Exception e) {
+					throw new ArgeoException("Stream error while opening file",
+							e);
+				} finally {
+					IOUtils.closeQuietly(fis);
+				}
+				if (ba != null)
+					return ba;
+			}
+
+		} catch (RepositoryException re) {
+			throw new ArgeoException("RepositoryException while reading file ",
+					re);
+		}
+
+		throw new ArgeoException("File not found for ID " + fileId);
+	}
+}
diff --git a/eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/utils/NodeViewerComparer.java b/eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/utils/NodeViewerComparer.java
new file mode 100644
index 000000000..63463d2f4
--- /dev/null
+++ b/eclipse/runtime/org.argeo.eclipse.ui.jcr/src/main/java/org/argeo/eclipse/ui/jcr/utils/NodeViewerComparer.java
@@ -0,0 +1,35 @@
+package org.argeo.eclipse.ui.jcr.utils;
+
+import javax.jcr.Node;
+import javax.jcr.RepositoryException;
+
+import org.argeo.ArgeoException;
+import org.eclipse.jface.viewers.IElementComparer;
+
+public class NodeViewerComparer implements IElementComparer {
+
+	// force comparison on Node IDs only.
+	public boolean equals(Object elementA, Object elementB) {
+		if (!(elementA instanceof Node) || !(elementB instanceof Node)) {
+			return elementA == null ? elementB == null : elementA
+					.equals(elementB);
+		} else {
+
+			boolean result = false;
+			try {
+				String idA = ((Node) elementA).getIdentifier();
+				String idB = ((Node) elementB).getIdentifier();
+				result = idA == null ? idB == null : idA.equals(idB);
+			} catch (RepositoryException re) {
+				throw new ArgeoException("cannot compare nodes", re);
+			}
+
+			return result;
+		}
+	}
+
+	public int hashCode(Object element) {
+		// TODO enhanced this method.
+		return element.getClass().toString().hashCode();
+	}
+}
\ No newline at end of file
-- 
2.30.2