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git-svn-id: http://anonsvn.jboss.org/repos/javassist/trunk@6 30ef5769-5b8d-40dd-aea6-55b5d6557bb3

1 files changed, 38 insertions, 0 deletions

diff --git a/sample/duplicate/DuplicatedObject.java b/sample/duplicate/DuplicatedObject.java
new file mode 100644
index 00000000..5995abcc
--- /dev/null
+++ b/sample/duplicate/DuplicatedObject.java
@@ -0,0 +1,38 @@
+package sample.duplicate;

+

+import javassist.reflect.*;

+

+public class DuplicatedObject extends Metaobject {

+    private DuplicatedObject backup;

+

+    // if a base-level object is created, this metaobject creates

+    // a copy of the base-level object.

+

+    public DuplicatedObject(Object self, Object[] args) {

+	super(self, args);

+	ClassMetaobject clazz = getClassMetaobject();

+	if (clazz.isInstance(args[0]))

+	    backup = null;	// self is a backup object.

+	else {

+	    Object[] args2 = new Object[1];

+	    args2[0] = self;

+	    try {

+		Metalevel m = (Metalevel)clazz.newInstance(args2);

+		backup = (DuplicatedObject)m._getMetaobject();

+	    }

+	    catch (CannotCreateException e) {

+		backup = null;

+	    }

+	}

+    }

+

+    public Object trapMethodcall(int identifier, Object[] args) 

+	throws Throwable

+    {

+	Object obj = super.trapMethodcall(identifier, args);

+	if (backup != null)

+	    backup.trapMethodcall(identifier, args);

+

+	return obj;

+    }

+}