[Mulgara-svn] r1547 - trunk/src/jar/util/java/org/mulgara/util

[pag at mulgara.org]

Author: pag
Date: 2009-02-25 10:51:53 -0800 (Wed, 25 Feb 2009)
New Revision: 1547

Modified:
   trunk/src/jar/util/java/org/mulgara/util/StringUtil.java
Log:
Added a method to unescape Java strings

Modified: trunk/src/jar/util/java/org/mulgara/util/StringUtil.java
===================================================================
--- trunk/src/jar/util/java/org/mulgara/util/StringUtil.java	2009-02-25 18:51:04 UTC (rev 1546)
+++ trunk/src/jar/util/java/org/mulgara/util/StringUtil.java	2009-02-25 18:51:53 UTC (rev 1547)
@@ -687,7 +687,45 @@
   }
 
 
+  /** Map of escape characters to their character codes */
+  private static Map<Character,String> map = new HashMap<Character,String>();
+  static {
+    map.put('t', "\t");
+    map.put('t', "\t");
+    map.put('b', "\b");
+    map.put('n', "\n");
+    map.put('r', "\r");
+    map.put('f', "\f");
+    map.put('\\', "\\");
+    map.put('"', "\"");
+    map.put('\'', "'");
+  }
+
+
   /**
+   * Search for escape characters in a string, and replace them with the request values.
+   * @param s The string to search.
+   * @return A new string with all escape characters replaced with the originals.
+   */
+  static final public String unescapeJavaString(String s) {
+    StringBuilder sb = new StringBuilder();
+    int last = 0;
+    int pos = 0;
+    while ((pos = s.indexOf('\\', pos)) >= 0) {
+      sb.append(s.substring(last, pos));
+      if (++pos == s.length()) break;
+      char c = s.charAt(pos);
+      String m = map.get(c);
+      if (m != null) sb.append(m);
+      else sb.append(c);
+      last = ++pos;
+    }
+    sb.append(s.substring(last));
+    return sb.toString();
+  }
+
+
+  /**
    * Returns a stack trace of a Throwable as a string, rather than the
    * default behaviour of sending it to stderr.
    *