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From jcar...@apache.org
Subject svn commit: r321167 - in /jakarta/commons/sandbox/proxy/trunk/src: java/org/apache/commons/proxy/provider/CloningProvider.java test/org/apache/commons/proxy/provider/TestCloningProvider.java
Date Fri, 14 Oct 2005 18:28:47 GMT
Author: jcarman
Date: Fri Oct 14 11:28:42 2005
New Revision: 321167

URL: http://svn.apache.org/viewcvs?rev=321167&view=rev
Log:
Added support for a cloning provider.

Added:
    jakarta/commons/sandbox/proxy/trunk/src/java/org/apache/commons/proxy/provider/CloningProvider.java
  (with props)
    jakarta/commons/sandbox/proxy/trunk/src/test/org/apache/commons/proxy/provider/TestCloningProvider.java
  (with props)

Added: jakarta/commons/sandbox/proxy/trunk/src/java/org/apache/commons/proxy/provider/CloningProvider.java
URL: http://svn.apache.org/viewcvs/jakarta/commons/sandbox/proxy/trunk/src/java/org/apache/commons/proxy/provider/CloningProvider.java?rev=321167&view=auto
==============================================================================
--- jakarta/commons/sandbox/proxy/trunk/src/java/org/apache/commons/proxy/provider/CloningProvider.java
(added)
+++ jakarta/commons/sandbox/proxy/trunk/src/java/org/apache/commons/proxy/provider/CloningProvider.java
Fri Oct 14 11:28:42 2005
@@ -0,0 +1,74 @@
+/* $Id$
+ *
+ * Copyright 2005 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.proxy.provider;
+
+import org.apache.commons.proxy.ObjectProvider;
+import org.apache.commons.proxy.ProxyUtils;
+import org.apache.commons.proxy.exception.ObjectProviderException;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.InvocationTargetException;
+
+/**
+ * Merely calls <code>clone()</code> (reflectively) on the given {@link Cloneable}
object.
+ *
+ * @author James Carman
+ * @version 1.0
+ */
+public class CloningProvider implements ObjectProvider
+{
+    private final Cloneable cloneable;
+    private Method cloneMethod;
+
+    public CloningProvider( Cloneable cloneable )
+    {
+        this.cloneable = cloneable;
+    }
+
+    private synchronized Method getCloneMethod()
+    {
+        if( cloneMethod == null )
+        {
+            try
+            {
+                cloneMethod = cloneable.getClass().getMethod( "clone", ProxyUtils.EMPTY_ARGUMENT_TYPES
);
+            }
+            catch( NoSuchMethodException e )
+            {
+                throw new ObjectProviderException( "Class " + cloneable.getClass().getName()
+ " does not have a public clone() method." );
+            }
+        }
+        return cloneMethod;
+    }
+
+    public Object getObject()
+    {
+        try
+        {
+            return getCloneMethod().invoke( cloneable, ProxyUtils.EMPTY_ARGUMENTS );
+        }
+        catch( IllegalAccessException e )
+        {
+            throw new ObjectProviderException( "Class " + cloneable.getClass().getName()
+ " does not have a public clone() method.", e );
+        }
+        catch( InvocationTargetException e )
+        {
+            throw new ObjectProviderException( "Attempt to clone object of type " + cloneable.getClass().getName()
+ " threw an exception.", e );
+        }
+    }
+
+}

Propchange: jakarta/commons/sandbox/proxy/trunk/src/java/org/apache/commons/proxy/provider/CloningProvider.java
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    svn:eol-style = native

Propchange: jakarta/commons/sandbox/proxy/trunk/src/java/org/apache/commons/proxy/provider/CloningProvider.java
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    svn:keywords = Id

Added: jakarta/commons/sandbox/proxy/trunk/src/test/org/apache/commons/proxy/provider/TestCloningProvider.java
URL: http://svn.apache.org/viewcvs/jakarta/commons/sandbox/proxy/trunk/src/test/org/apache/commons/proxy/provider/TestCloningProvider.java?rev=321167&view=auto
==============================================================================
--- jakarta/commons/sandbox/proxy/trunk/src/test/org/apache/commons/proxy/provider/TestCloningProvider.java
(added)
+++ jakarta/commons/sandbox/proxy/trunk/src/test/org/apache/commons/proxy/provider/TestCloningProvider.java
Fri Oct 14 11:28:42 2005
@@ -0,0 +1,72 @@
+/* $Id$
+ *
+ * Copyright 2005 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.proxy.provider;
+
+import junit.framework.TestCase;
+import org.apache.commons.proxy.exception.ObjectProviderException;
+
+import java.util.Date;
+
+public class TestCloningProvider extends TestCase
+{
+    public void testValidCloneable()
+    {
+        final Date now = new Date();
+        final CloningProvider provider = new CloningProvider( now );
+        final Date clone = ( Date ) provider.getObject();
+        assertEquals( now, clone );
+        assertNotSame( now, clone );
+    }
+
+    public void testWithInvalidCloneable()
+    {
+        final CloningProvider provider = new CloningProvider( new InvalidCloneable() );
+        try
+        {
+            provider.getObject();
+            fail();
+        }
+        catch( ObjectProviderException e )
+        {
+        }
+    }
+
+    public void testWithExceptionThrown()
+    {
+        final CloningProvider provider = new CloningProvider( new ExceptionCloneable() );
+        try
+        {
+            provider.getObject();
+            fail();
+        }
+        catch( ObjectProviderException e )
+        {
+        }
+    }
+
+    public static class InvalidCloneable implements Cloneable
+    {
+    }
+
+    public static class ExceptionCloneable implements Cloneable
+    {
+        public Object clone()
+        {
+            throw new RuntimeException( "No clone for you!" );
+        }
+    }
+}
\ No newline at end of file

Propchange: jakarta/commons/sandbox/proxy/trunk/src/test/org/apache/commons/proxy/provider/TestCloningProvider.java
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    svn:eol-style = native

Propchange: jakarta/commons/sandbox/proxy/trunk/src/test/org/apache/commons/proxy/provider/TestCloningProvider.java
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    svn:keywords = Id



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