update of javajs package; adds org.apache.harmony, org.xml.sax.helpers

[jalview.git] / src / org / apache / harmony / luni / util / MsgHelp.java

diff --git a/src/org/apache/harmony/luni/util/MsgHelp.java b/src/org/apache/harmony/luni/util/MsgHelp.java
new file mode 100644 (file)
index 0000000..592d8b3
--- /dev/null
+++ b/src/org/apache/harmony/luni/util/MsgHelp.java
@@ -0,0 +1,124 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You 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.apache.harmony.luni.util;
+
+/**
+ * This class contains helper methods for loading resource bundles and
+ * formatting external message strings.
+ * 
+ */
+
+public final class MsgHelp {
+
+       /**
+        * Generates a formatted text string given a source string containing
+        * "argument markers" of the form "{argNum}" where each argNum must be in
+        * the range 0..9. The result is generated by inserting the toString of each
+        * argument into the position indicated in the string.
+        * <p>
+        * To insert the "{" character into the output, use a single backslash
+        * character to escape it (i.e. "\{"). The "}" character does not need to be
+        * escaped.
+        * 
+        * @param format
+        *            String the format to use when printing.
+        * @param args
+        *            Object[] the arguments to use.
+        * @return String the formatted message.
+        */
+       public static String format(String format, Object[] args) {
+               StringBuilder answer = new StringBuilder(format.length()
+                               + (args.length * 20));
+               String[] argStrings = new String[args.length];
+               for (int i = 0; i < args.length; ++i) {
+                       if (args[i] == null)
+                               argStrings[i] = "<null>";
+                       else
+                               argStrings[i] = args[i].toString();
+               }
+               int lastI = 0;
+               for (int i = format.indexOf('{', 0); i >= 0; i = format.indexOf('{',
+                               lastI)) {
+                       if (i != 0 && format.charAt(i - 1) == '\\') {
+                               // It's escaped, just print and loop.
+                               if (i != 1)
+                                       answer.append(format.substring(lastI, i - 1));
+                               answer.append('{');
+                               lastI = i + 1;
+                       } else {
+                               // It's a format character.
+                               if (i > format.length() - 3) {
+                                       // Bad format, just print and loop.
+                                       answer.append(format.substring(lastI, format.length()));
+                                       lastI = format.length();
+                               } else {
+//                                     int argnum = (byte) Character.digit(format.charAt(i + 1),
+//                                                     10);
+                                       int argnum = (byte) (format.charAt(i + 1) - '0');
+                                       if (argnum < 0 || format.charAt(i + 2) != '}') {
+                                               // Bad format, just print and loop.
+                                               answer.append(format.substring(lastI, i + 1));
+                                               lastI = i + 1;
+                                       } else {
+                                               // Got a good one!
+                                               answer.append(format.substring(lastI, i));
+                                               if (argnum >= argStrings.length)
+                                                       answer.append("<missing argument>");
+                                               else
+                                                       answer.append(argStrings[argnum]);
+                                               lastI = i + 3;
+                                       }
+                               }
+                       }
+               }
+               if (lastI < format.length())
+                       answer.append(format.substring(lastI, format.length()));
+               return answer.toString();
+       }
+
+//     /**
+//      * Changes the locale of the messages.
+//      * 
+//      * @param locale
+//      *            Locale the locale to change to.
+//      */
+//     static public ResourceBundle setLocale(final Locale locale,
+//                     final String resource) {
+//             /*
+//             try {
+//                     final ClassLoader loader = VM.bootCallerClassLoader();
+//                     return (ResourceBundle) AccessController
+//                                     .doPrivileged(new PrivilegedAction<Object>() {
+//                                             public Object run() {
+//                                                     return ResourceBundle.getBundle(resource, locale,
+//                                                                     loader != null ? loader : ClassLoader.getSystemClassLoader());
+//                                             }
+//                                     });
+//             } catch (MissingResourceException e) {
+//             }
+//             */
+//             /**
+//              * @j2sNative
+//              * 
+//              * Class.forName("java.util.ResourceBundle");
+//              */
+//             {}
+//             return ResourceBundle.getBundle(resource);
+//             //return null;
+//     }
+}