1 files changed, 117 insertions, 0 deletions
diff --git a/common/src/at/gv/egovernment/moa/util/Messages.java b/common/src/at/gv/egovernment/moa/util/Messages.java
new file mode 100644
index 000000000..a0139ae93
--- /dev/null
+++ b/common/src/at/gv/egovernment/moa/util/Messages.java
@@ -0,0 +1,117 @@
+package at.gv.egovernment.moa.util;
+
+import java.text.MessageFormat;
+import java.util.Locale;
+import java.util.MissingResourceException;
+import java.util.PropertyResourceBundle;
+
+import at.gv.egovernment.moa.logging.Logger;
+
+/**
+ * Provides access to the system messages resource used for exception handling
+ * and logging messages.
+ * 
+ * Messages must be provided as a resource bundle at the path.
+ * 
+ * @author Patrick Peck
+ * @version $Id$
+ */
+public class Messages {
+  /** Error message indicating that no messages are avaiable. */
+  private static final String ERROR_MESSAGES_UNAVAILABLE =
+    "Fehler in der Server-Konfiguration. "
+      + "Die Fehlertexte konnten nicht geladen werden.";
+  /** Error message indicating that the message is not available. */
+  private static final String ERROR_NO_MESSAGE =
+    "Keine Fehlermeldung für Fehler-Nr.={0}";
+
+  /** The names of the resources containing the messages. */
+  private String[] resourceNames;
+  /** The corresponding <code>Locale</code>s of the resources. */
+  private Locale[] locales;
+  /** The <code>ResourceBundle</code>s containing the messages. */
+  private ResourceBundleChain messages;
+
+  /**
+   * Create a new <code>Message</code> object containing the messages
+   * in the given resources.
+   * 
+   * @param resourceNames The names of the resources containing the messages.
+   * @param locales The corresponding locales.
+   */
+  public Messages(String[] resourceNames, Locale[] locales) {
+    this.resourceNames = resourceNames;
+    this.locales = locales;
+    this.messages = null;
+  }
+
+  /**
+   * Get the message corresponding to a given message ID.
+   *
+   * @param messageId The ID of the message.
+   * @param parameters The parameters to fill in into the message arguments.
+   * @return The formatted message. 
+   */
+  public String getMessage(String messageId, Object[] parameters) {
+    // initialize messages
+    if (messages == null) {
+      initMessages();
+    }
+
+    // create the message
+    if (messages == null) {
+      return ERROR_MESSAGES_UNAVAILABLE;
+    } else {
+      try {
+        String rawMessage = messages.getString(messageId);
+        return MessageFormat.format(rawMessage, parameters);
+      } catch (MissingResourceException e2) {
+        // couldn't find any message -> set to default error message 
+        return MessageFormat.format(
+          ERROR_NO_MESSAGE,
+          new Object[] { messageId });
+      }
+    }
+  }
+
+  /**
+   * Return the names of the resources containing the messages.
+   * 
+   * @return String[] The names of the resource bundles containing the messages.
+   */
+  private String[] getResourceNames() {
+    return resourceNames;
+  }
+
+  /**
+   * Return the <code>Locale</code>s of the resources containing the messages.
+   * 
+   * @return Locale[] The <code>Locale</code>s of the resource bundles
+   * containing the messages.
+   */
+  private Locale[] getLocales() {
+    return locales;
+  }
+
+  /**
+   * Initialize the <code>messages</code> <code>ResourceBundle</code> containing
+   * the MOA error messages.
+   */
+  private void initMessages() {
+    messages = new ResourceBundleChain();
+    int i;
+
+    // initialize the message resources
+    for (i = 0; i < resourceNames.length; i++) {
+      try {
+        messages.addResourceBundle(
+          PropertyResourceBundle.getBundle(
+            getResourceNames()[i],
+            getLocales()[i]));
+      } catch (MissingResourceException e) {
+        Logger.error(ERROR_MESSAGES_UNAVAILABLE, e);
+      }
+    }
+  }
+
+}