From e2b5b01e6f3e751da6489f6cc9d4431d2b39bcc4 Mon Sep 17 00:00:00 2001
From: Mathieu Baudier <mbaudier@argeo.org>
Date: Tue, 22 Oct 2019 14:24:59 +0200
Subject: [PATCH] Introduce JCR versioning Eclipse utilities.

---
 .../ui/jcr/VersionColumnLabelProvider.java    | 80 +++++++++++++++++++
 .../ui/jcr/VersionHistoryContentProvider.java | 42 ++++++++++
 2 files changed, 122 insertions(+)
 create mode 100644 org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/VersionColumnLabelProvider.java
 create mode 100644 org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/VersionHistoryContentProvider.java

diff --git a/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/VersionColumnLabelProvider.java b/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/VersionColumnLabelProvider.java
new file mode 100644
index 000000000..1ce315429
--- /dev/null
+++ b/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/VersionColumnLabelProvider.java
@@ -0,0 +1,80 @@
+package org.argeo.eclipse.ui.jcr;
+
+import javax.jcr.Node;
+import javax.jcr.Property;
+import javax.jcr.RepositoryException;
+import javax.jcr.version.Version;
+
+import org.eclipse.jface.viewers.ColumnLabelProvider;
+import org.eclipse.swt.graphics.Image;
+
+/** Simplifies writing JCR-based column label provider. */
+public class VersionColumnLabelProvider extends ColumnLabelProvider {
+	private static final long serialVersionUID = -6117690082313161159L;
+
+	protected String getVersionText(Version version) throws RepositoryException {
+		return super.getText(version);
+	}
+
+	protected String getVersionToolTipText(Version version) throws RepositoryException {
+		return super.getToolTipText(version);
+	}
+
+	protected Image getVersionImage(Version version) throws RepositoryException {
+		return super.getImage(version);
+	}
+
+	protected String getUserName(Version version) throws RepositoryException {
+		Node node = version.getFrozenNode();
+		if(node.hasProperty(Property.JCR_LAST_MODIFIED_BY))
+			return node.getProperty(Property.JCR_LAST_MODIFIED_BY).getString();
+		if(node.hasProperty(Property.JCR_CREATED_BY))
+			return node.getProperty(Property.JCR_CREATED_BY).getString();
+		return null;
+	}
+	
+//	protected String getActivityTitle(Version version) throws RepositoryException {
+//		Node activity = getActivity(version);
+//		if (activity == null)
+//			return null;
+//		if (activity.hasProperty("jcr:activityTitle"))
+//			return activity.getProperty("jcr:activityTitle").getString();
+//		else
+//			return activity.getName();
+//	}
+//
+//	protected Node getActivity(Version version) throws RepositoryException {
+//		if (version.hasProperty(Property.JCR_ACTIVITY)) {
+//			return version.getProperty(Property.JCR_ACTIVITY).getNode();
+//		} else
+//			return null;
+//	}
+
+	@Override
+	public String getText(Object element) {
+		try {
+			return getVersionText((Version) element);
+		} catch (RepositoryException e) {
+			throw new RuntimeException("Runtime repository exception when accessing " + element, e);
+		}
+	}
+
+	@Override
+	public Image getImage(Object element) {
+		try {
+			return getVersionImage((Version) element);
+		} catch (RepositoryException e) {
+			throw new RuntimeException("Runtime repository exception when accessing " + element, e);
+		}
+	}
+
+	@Override
+	public String getToolTipText(Object element) {
+		try {
+			return getVersionToolTipText((Version) element);
+		} catch (RepositoryException e) {
+			throw new RuntimeException("Runtime repository exception when accessing " + element, e);
+		}
+	}
+
+}
diff --git a/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/VersionHistoryContentProvider.java b/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/VersionHistoryContentProvider.java
new file mode 100644
index 000000000..0ff7dce08
--- /dev/null
+++ b/org.argeo.eclipse.ui/src/org/argeo/eclipse/ui/jcr/VersionHistoryContentProvider.java
@@ -0,0 +1,42 @@
+package org.argeo.eclipse.ui.jcr;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+import javax.jcr.RepositoryException;
+import javax.jcr.version.Version;
+import javax.jcr.version.VersionHistory;
+import javax.jcr.version.VersionIterator;
+
+import org.eclipse.jface.viewers.IStructuredContentProvider;
+import org.eclipse.jface.viewers.Viewer;
+
+/** Content provider based on a {@link VersionHistory}. */
+public class VersionHistoryContentProvider implements IStructuredContentProvider {
+	private static final long serialVersionUID = -4921107883428887012L;
+
+	@Override
+	public void dispose() {
+	}
+
+	@Override
+	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
+	}
+
+	@Override
+	public Object[] getElements(Object inputElement) {
+		try {
+			VersionHistory versionHistory = (VersionHistory) inputElement;
+			List<Version> lst = new ArrayList<>();
+			VersionIterator vit = versionHistory.getAllLinearVersions();
+			while (vit.hasNext())
+				lst.add(vit.nextVersion());
+			Collections.reverse(lst);
+			return lst.toArray();
+		} catch (RepositoryException e) {
+			throw new IllegalStateException("Cannot list versions", e);
+		}
+	}
+
+}
-- 
2.30.2