Package org.objenesis.strategy

Source Code of org.objenesis.strategy.SerializingInstantiatorStrategy

/**
* Copyright 2006-2013 the original author or authors.
*
* 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.objenesis.strategy;

import static org.objenesis.strategy.PlatformDescription.*;

import java.io.NotSerializableException;
import java.io.Serializable;

import org.objenesis.ObjenesisException;
import org.objenesis.instantiator.ObjectInstantiator;
import org.objenesis.instantiator.android.AndroidSerializationInstantiator;
import org.objenesis.instantiator.basic.ObjectStreamClassInstantiator;
import org.objenesis.instantiator.gcj.GCJSerializationInstantiator;
import org.objenesis.instantiator.perc.PercSerializationInstantiator;

/**
* Guess the best serializing instantiator for a given class. The returned instantiator will
* instantiate classes like the genuine java serialization framework (the constructor of the first
* not serializable class will be called). Currently, the selection doesn't depend on the class. It
* relies on the
* <ul>
* <li>JVM version</li>
* <li>JVM vendor</li>
* <li>JVM vendor version</li>
* </ul>
* However, instantiators are stateful and so dedicated to their class.
*
* @author Henri Tremblay
* @see ObjectInstantiator
*/
public class SerializingInstantiatorStrategy extends BaseInstantiatorStrategy {

   /**
    * Return an {@link ObjectInstantiator} allowing to create instance following the java
    * serialization framework specifications.
    *
    * @param type Class to instantiate
    * @return The ObjectInstantiator for the class
    */
   public <T> ObjectInstantiator<T> newInstantiatorOf(Class<T> type) {
      if(!Serializable.class.isAssignableFrom(type)) {
         throw new ObjenesisException(new NotSerializableException(type+" not serializable"));
      }
      if(JVM_NAME.startsWith(SUN) || PlatformDescription.isThisJVM(OPENJDK)) {
         return new ObjectStreamClassInstantiator<T>(type);
      }
      else if(JVM_NAME.startsWith(DALVIK)) {
         return new AndroidSerializationInstantiator<T>(type);
      }
      else if(JVM_NAME.startsWith(GNU)) {
         return new GCJSerializationInstantiator<T>(type);
      }
      else if(JVM_NAME.startsWith(PERC)) {
         return new PercSerializationInstantiator<T>(type);
      }
     
      return new ObjectStreamClassInstantiator<T>(type);
   }

}
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