[libbluray-devel] Deep copy implementation

[hpi1]

libbluray | branch: master | hpi1 <hpi1 at anonymous.org> | Sun Mar 17 10:12:02 2013 +0200| [8b03feb53f6117d581ab831781ff01f6dda6b7f5] | committer: hpi1

Deep copy implementation
(with xlet classloader to resolve classes)

> http://git.videolan.org/gitweb.cgi/libbluray.git/?a=commit;h=8b03feb53f6117d581ab831781ff01f6dda6b7f5
---

 src/libbluray/bdj/java/org/videolan/Copy.java |   72 +++++++++++++++++++++++++
 1 file changed, 72 insertions(+)

diff --git a/src/libbluray/bdj/java/org/videolan/Copy.java b/src/libbluray/bdj/java/org/videolan/Copy.java
new file mode 100644
index 0000000..ea48ae0
--- /dev/null
+++ b/src/libbluray/bdj/java/org/videolan/Copy.java
@@ -0,0 +1,72 @@
+/*
+ * This file is part of libbluray
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+package org.videolan;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.io.ObjectStreamClass;
+import java.io.Serializable;
+
+public class Copy {
+
+    public static Serializable deepCopy(ClassLoader cl, Serializable obj) throws IOException, ClassNotFoundException {
+        ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        ObjectOutputStream oos = new ObjectOutputStream(bos);
+        try {
+            oos.writeObject(obj);
+        } catch (Exception e) {
+            System.err.println("deepCopy write failed: " + e);
+        } finally {
+            oos.close();
+        }
+
+        ClObjectInputStream ios = new ClObjectInputStream(cl, new ByteArrayInputStream(bos.toByteArray()));
+        return (Serializable)ios.readObject();
+    }
+
+    /* ObjectInputStream with xlet class loader */
+    private static class ClObjectInputStream extends ObjectInputStream {
+        private ClassLoader classLoader = null;
+
+        public ClObjectInputStream(ClassLoader cl, InputStream in) throws IOException {
+            super(in);
+            classLoader = cl;
+        }
+
+        protected Class resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException {
+            try {
+                return Class.forName(desc.getName(), false, classLoader);
+            } catch (ClassNotFoundException e) {
+                Class cl = super.resolveClass(desc);
+                if (cl != null) {
+                    return cl;
+                }
+                System.err.println("deepCopy: failed to resolve class " + desc.getName());
+                throw e;
+            } catch (Throwable t) {
+                System.err.println("deepCopy: failed to resolve class " + desc.getName() + ": " + t);
+                return null;
+            }
+        }
+    }
+}
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