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+/* FormatUtil.java -- Encoding and decoding format utility methods
+   Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package gnu.java.security.util;
+
+import gnu.java.security.Registry;
+
+/**
+ * Encoding and decoding format utility methods.
+ */
+public class FormatUtil
+{
+  /** Trivial constructor to enforce Singleton pattern. */
+  private FormatUtil()
+  {
+    super();
+  }
+
+  /**
+   * Returns the fully qualified name of the designated encoding ID.
+   * 
+   * @param formatID the unique identifier of the encoding format.
+   * @return the fully qualified name of the designated format. Returns
+   *         <code>null</code> if no such encoding format is known.
+   */
+  public static final String getEncodingName(int formatID)
+  {
+    String result = null;
+    switch (formatID)
+      {
+      case Registry.RAW_ENCODING_ID:
+        result = Registry.RAW_ENCODING;
+        break;
+      case Registry.X509_ENCODING_ID:
+        result = Registry.X509_ENCODING;
+        break;
+      case Registry.PKCS8_ENCODING_ID:
+        result = Registry.PKCS8_ENCODING;
+        break;
+      case Registry.ASN1_ENCODING_ID:
+        result = Registry.ASN1_ENCODING;
+        break;
+      }
+
+    return result;
+  }
+
+  /**
+   * Returns the short name of the designated encoding ID. This is used by the
+   * JCE Adapters.
+   * 
+   * @param formatID the unique identifier of the encoding format.
+   * @return the short name of the designated format. Returns <code>null</code>
+   *         if no such encoding format is known.
+   */
+  public static final String getEncodingShortName(int formatID)
+  {
+    String result = null;
+    switch (formatID)
+      {
+      case Registry.RAW_ENCODING_ID:
+        result = Registry.RAW_ENCODING_SHORT_NAME;
+        break;
+      case Registry.X509_ENCODING_ID:
+        result = Registry.X509_ENCODING_SORT_NAME;
+        break;
+      case Registry.PKCS8_ENCODING_ID:
+        result = Registry.PKCS8_ENCODING_SHORT_NAME;
+        break;
+      case Registry.ASN1_ENCODING_ID:
+        result = Registry.ASN1_ENCODING_SHORT_NAME;
+        break;
+      }
+
+    return result;
+  }
+
+  /**
+   * Returns the identifier of the encoding format given its short name.
+   * 
+   * @param name the case-insensitive canonical short name of an encoding
+   *          format.
+   * @return the identifier of the designated encoding format, or <code>0</code>
+   *         if the name does not correspond to any known format.
+   */
+  public static final int getFormatID(String name)
+  {
+    if (name == null)
+      return 0;
+
+    name = name.trim();
+    if (name.length() == 0)
+      return 0;
+
+    int result = 0;
+    if (name.equalsIgnoreCase(Registry.RAW_ENCODING_SHORT_NAME))
+      result = Registry.RAW_ENCODING_ID;
+    else if (name.equalsIgnoreCase(Registry.X509_ENCODING_SORT_NAME))
+      result = Registry.X509_ENCODING_ID;
+    else if (name.equalsIgnoreCase(Registry.PKCS8_ENCODING_SHORT_NAME))
+      result = Registry.PKCS8_ENCODING_ID;
+    
+    return result;
+  }
+}