[client] Add helper classes for i18n.

1 files changed, 50 insertions, 0 deletions

diff --git a/dozentenmodul/src/main/java/org/openslx/dozmod/gui/helper/I18n.java b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/helper/I18n.java
new file mode 100644
index 00000000..fe976b59
--- /dev/null
+++ b/dozentenmodul/src/main/java/org/openslx/dozmod/gui/helper/I18n.java
@@ -0,0 +1,50 @@
+package org.openslx.dozmod.gui.helper;
+
+import org.apache.log4j.Logger;
+
+import java.text.MessageFormat;
+import java.util.ResourceBundle;
+
+/**
+ * Helper enum for loading resource bundle files and getting values from them.
+ */
+public enum I18n {
+    ACTIVITY("activity"),
+    CONFIGURATOR("configurator"),
+    CONTROL("control"),
+    HELPER("helper"),
+    PAGE("page"),
+    PAGE_LAYOUT("page_layout"),
+    WINDOW("window"),
+    WINDOW_LAYOUT("window_layout"),
+    WIZARD("wizard");
+
+    /**
+     * Logger for this class
+     */
+    private final static Logger LOGGER = Logger.getLogger(I18n.class);
+
+    private final ResourceBundle resourceBundle;
+
+    I18n(String bundleFilename) {
+        String baseName = "i18n." + bundleFilename;
+        resourceBundle = ResourceBundle.getBundle(baseName, new UTF8Control());
+    }
+
+    /**
+     * Returns i18n value for a given key and format the output at the appropriate places for (a) given parameter(s).
+     * If no key is found, return the key.
+     * @param key to get value
+     * @param params to get formatted output
+     * @return value represented by key or key on error
+     */
+    public String getString(String key, Object... params) {
+        try {
+            String value = resourceBundle.getString(key);
+            return MessageFormat.format(value, params);
+        } catch (Exception e) {
+            LOGGER.error("Could not find a value for the given key: " + key);
+            return key;
+        }
+    }
+}
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