New project conventions

[lgpl/argeo-commons.git] / org.argeo.eclipse.ui.rcp / src / org / argeo / eclipse / ui / specific / ThreadNLS.java

diff --git a/org.argeo.eclipse.ui.rcp/src/org/argeo/eclipse/ui/specific/ThreadNLS.java b/org.argeo.eclipse.ui.rcp/src/org/argeo/eclipse/ui/specific/ThreadNLS.java
new file mode 100644 (file)
index 0000000..c87f6e5
--- /dev/null
+++ b/org.argeo.eclipse.ui.rcp/src/org/argeo/eclipse/ui/specific/ThreadNLS.java
@@ -0,0 +1,89 @@
+/*
+ * 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.specific;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.MissingResourceException;
+import java.util.ResourceBundle;
+
+import org.argeo.util.LocaleUtils;
+import org.eclipse.osgi.util.NLS;
+
+/** NLS attached to a given thread */
+public class ThreadNLS<T extends NLS> extends InheritableThreadLocal<T> {
+       public final static String DEFAULT_BUNDLE_LOCATION = "/properties/plugin";
+
+       private final String bundleLocation;
+
+       private Class<T> type;
+       private Boolean utf8 = false;
+
+       public ThreadNLS(String bundleLocation, Class<T> type, Boolean utf8) {
+               this.bundleLocation = bundleLocation;
+               this.type = type;
+               this.utf8 = utf8;
+       }
+
+       public ThreadNLS(Class<T> type) {
+               this(DEFAULT_BUNDLE_LOCATION, type, false);
+       }
+
+       @Override
+       protected T initialValue() {
+               ResourceBundle bundle = ResourceBundle.getBundle(bundleLocation,
+                               LocaleUtils.threadLocale.get(), type.getClassLoader());
+               T result;
+               try {
+                       NLS.initializeMessages(bundleLocation, type);
+                       Constructor<T> constructor = type.getConstructor();
+                       constructor.setAccessible(true);
+                       result = constructor.newInstance();
+                       final Field[] fieldArray = type.getDeclaredFields();
+                       for (int i = 0; i < fieldArray.length; i++) {
+                               int modifiers = fieldArray[i].getModifiers();
+                               if (String.class.isAssignableFrom(fieldArray[i].getType())
+                                               && Modifier.isPublic(modifiers)
+                                               && !Modifier.isStatic(modifiers)) {
+                                       try {
+                                               String value = bundle
+                                                               .getString(fieldArray[i].getName());
+                                               byte[] bytes = value.getBytes();
+
+                                               String forcedValue;
+                                               if (utf8)
+                                                       forcedValue = new String(bytes, "UTF8");
+                                               else
+                                                       forcedValue = value;
+                                               if (value != null) {
+                                                       fieldArray[i].setAccessible(true);
+                                                       fieldArray[i].set(result, forcedValue);
+                                               }
+                                       } catch (final MissingResourceException mre) {
+                                               fieldArray[i].setAccessible(true);
+                                               fieldArray[i].set(result, "");
+                                               mre.printStackTrace();
+                                       }
+                               }
+                       }
+                       return result;
+               } catch (final Exception ex) {
+                       throw new IllegalStateException(ex.getMessage());
+               }
+       }
+
+}