aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.4.3/libjava/classpath/gnu/java/security/prng/PRNGFactory.java
diff options
context:
space:
mode:
Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/java/security/prng/PRNGFactory.java')
-rw-r--r--gcc-4.4.3/libjava/classpath/gnu/java/security/prng/PRNGFactory.java92
1 files changed, 92 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/security/prng/PRNGFactory.java b/gcc-4.4.3/libjava/classpath/gnu/java/security/prng/PRNGFactory.java
new file mode 100644
index 000000000..ae15d053b
--- /dev/null
+++ b/gcc-4.4.3/libjava/classpath/gnu/java/security/prng/PRNGFactory.java
@@ -0,0 +1,92 @@
+/* PRNGFactory.java --
+ Copyright (C) 2001, 2002, 2003, 2006 Free Software Foundation, Inc.
+
+This file is a 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 of the License, 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; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, 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.prng;
+
+import gnu.java.security.Registry;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * A Factory to instantiate pseudo random number generators.
+ */
+public class PRNGFactory
+ implements Registry
+{
+ /** Trivial constructor to enforce <i>Singleton</i> pattern. */
+ protected PRNGFactory()
+ {
+ }
+
+ /**
+ * Returns an instance of a padding algorithm given its name.
+ *
+ * @param prng the case-insensitive name of the PRNG.
+ * @return an instance of the pseudo-random number generator.
+ * @exception InternalError if the implementation does not pass its self-
+ * test.
+ */
+ public static final IRandom getInstance(String prng)
+ {
+ if (prng == null)
+ return null;
+
+ prng = prng.trim();
+ IRandom result = null;
+ if (prng.equalsIgnoreCase(MD_PRNG))
+ result = new MDGenerator();
+
+ return result;
+ }
+
+ /**
+ * Returns a {@link Set} of names of padding algorithms supported by this
+ * <i>Factory</i>.
+ *
+ * @return a {@link Set} of pseudo-random number generator algorithm names
+ * (Strings).
+ */
+ public static final Set getNames()
+ {
+ HashSet hs = new HashSet();
+ hs.add(MD_PRNG);
+ return Collections.unmodifiableSet(hs);
+ }
+}