X-Git-Url: http://git.argeo.org/?a=blobdiff_plain;f=org.argeo.eclipse.ui%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2Feclipse%2Fui%2Fjcr%2FJcrPreferenceStore.java;fp=org.argeo.eclipse.ui%2Fsrc%2Fmain%2Fjava%2Forg%2Fargeo%2Feclipse%2Fui%2Fjcr%2FJcrPreferenceStore.java;h=c9777cefde34c6106cdeed2ebe42d328a56629a9;hb=59fd3768e7925334805dca3825f6f87f082d9810;hp=0000000000000000000000000000000000000000;hpb=10601692cf0865b7e7fcb68c14b0e2fc3ea791a3;p=lgpl%2Fargeo-commons.git

diff --git a/org.argeo.eclipse.ui/src/main/java/org/argeo/eclipse/ui/jcr/JcrPreferenceStore.java b/org.argeo.eclipse.ui/src/main/java/org/argeo/eclipse/ui/jcr/JcrPreferenceStore.java
new file mode 100644
index 000000000..c9777cefd
--- /dev/null
+++ b/org.argeo.eclipse.ui/src/main/java/org/argeo/eclipse/ui/jcr/JcrPreferenceStore.java
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2007-2012 Argeo GmbH
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.argeo.eclipse.ui.jcr;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.Properties;
+
+import javax.jcr.Node;
+import javax.jcr.Property;
+import javax.jcr.PropertyIterator;
+import javax.jcr.RepositoryException;
+import javax.jcr.Session;
+import javax.jcr.version.VersionManager;
+
+import org.apache.commons.io.IOUtils;
+import org.argeo.ArgeoException;
+import org.argeo.jcr.ArgeoNames;
+import org.argeo.jcr.ArgeoTypes;
+import org.argeo.jcr.JcrUtils;
+import org.argeo.jcr.UserJcrUtils;
+import org.eclipse.jface.preference.PreferenceStore;
+import org.eclipse.ui.preferences.ScopedPreferenceStore;
+import org.osgi.framework.BundleContext;
+
+/**
+ * Persist preferences as key/value pairs under ~/argeo:preferences.<br>
+ * TODO: better integrate JCR and Eclipse:<br>
+ * - typing<br>
+ * - use eclipse preferences<br>
+ * - better integrate with {@link ScopedPreferenceStore} provided by RAP
+ */
+public class JcrPreferenceStore extends PreferenceStore implements ArgeoNames {
+	private Session session;
+	private BundleContext bundleContext;
+
+	/** Retrieves the preference node */
+	protected Node getPreferenceNode() {
+		try {
+			if (session.hasPendingChanges())
+				session.save();
+			Node userHome = UserJcrUtils.getUserHome(session);
+			if (userHome == null)
+				throw new ArgeoException("No user home for "
+						+ session.getUserID());
+			Node preferences;
+			if (!userHome.hasNode(ARGEO_PREFERENCES)) {
+				preferences = userHome.addNode(ARGEO_PREFERENCES);
+				preferences.addMixin(ArgeoTypes.ARGEO_PREFERENCE_NODE);
+				session.save();
+			} else
+				preferences = userHome.getNode(ARGEO_PREFERENCES);
+
+			String pluginPreferencesName = bundleContext.getBundle()
+					.getSymbolicName();
+			Node pluginPreferences;
+			if (!preferences.hasNode(pluginPreferencesName)) {
+				VersionManager vm = session.getWorkspace().getVersionManager();
+				vm.checkout(preferences.getPath());
+				pluginPreferences = preferences.addNode(pluginPreferencesName);
+				pluginPreferences.addMixin(ArgeoTypes.ARGEO_PREFERENCE_NODE);
+				session.save();
+				vm.checkin(preferences.getPath());
+			} else
+				pluginPreferences = preferences.getNode(pluginPreferencesName);
+			return pluginPreferences;
+		} catch (RepositoryException e) {
+			e.printStackTrace();
+			JcrUtils.discardQuietly(session);
+			throw new ArgeoException("Cannot retrieve preferences", e);
+		}
+
+	}
+
+	@Override
+	public void load() throws IOException {
+		ByteArrayOutputStream out = null;
+		ByteArrayInputStream in = null;
+		try {
+			Properties props = new Properties();
+			PropertyIterator it = getPreferenceNode().getProperties();
+			while (it.hasNext()) {
+				Property p = it.nextProperty();
+				if (!p.isMultiple() && !p.getDefinition().isProtected()) {
+					props.setProperty(p.getName(), p.getValue().getString());
+				}
+			}
+			out = new ByteArrayOutputStream();
+			props.store(out, "");
+			in = new ByteArrayInputStream(out.toByteArray());
+			load(in);
+		} catch (Exception e) {
+			e.printStackTrace();
+			throw new ArgeoException("Cannot load preferences", e);
+		} finally {
+			IOUtils.closeQuietly(in);
+			IOUtils.closeQuietly(out);
+		}
+	}
+
+	@Override
+	public void save() throws IOException {
+		ByteArrayOutputStream out = null;
+		ByteArrayInputStream in = null;
+		Node pluginPreferences = null;
+		try {
+			out = new ByteArrayOutputStream();
+			save(out, "");
+			in = new ByteArrayInputStream(out.toByteArray());
+			Properties props = new Properties();
+			props.load(in);
+			pluginPreferences = getPreferenceNode();
+			VersionManager vm = pluginPreferences.getSession().getWorkspace()
+					.getVersionManager();
+			vm.checkout(pluginPreferences.getPath());
+			for (Object key : props.keySet()) {
+				String name = key.toString();
+				String value = props.getProperty(name);
+				pluginPreferences.setProperty(name, value);
+			}
+			JcrUtils.updateLastModified(pluginPreferences);
+			pluginPreferences.getSession().save();
+			vm.checkin(pluginPreferences.getPath());
+		} catch (Exception e) {
+			JcrUtils.discardUnderlyingSessionQuietly(pluginPreferences);
+			throw new ArgeoException("Cannot save preferences", e);
+		} finally {
+			IOUtils.closeQuietly(in);
+			IOUtils.closeQuietly(out);
+		}
+	}
+
+	public void init() {
+		try {
+			load();
+		} catch (IOException e) {
+			throw new ArgeoException("Cannot initialize preference store", e);
+		}
+	}
+
+	public void setSession(Session session) {
+		this.session = session;
+	}
+
+	public void setBundleContext(BundleContext bundleContext) {
+		this.bundleContext = bundleContext;
+	}
+
+}