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package mnemosyne.core; |
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import mnemosyne.aop.AopSystem; |
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import org.apache.commons.logging.Log; |
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import org.apache.commons.logging.LogFactory; |
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import java.lang.reflect.Field; |
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import java.util.HashSet; |
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import java.util.Set; |
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public class EnhancerImpl implements Enhancer |
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{ |
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private static final Log log = LogFactory.getLog(EnhancerImpl.class); |
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private AopSystem aopSystem; |
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private PersistentObjectFactory persistentObjectFactory; |
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public EnhancerImpl(PersistentObjectFactory persistentObjectFactory, AopSystem aopSystem) |
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{ |
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this.aopSystem = aopSystem; |
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this.persistentObjectFactory = persistentObjectFactory; |
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} |
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public Set enhance(Object obj) |
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{ |
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log.debug("Enhancing object of type " + obj.getClass().getName()); |
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Set addedObjects = new HashSet(); |
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Persistable persistable = (Persistable) obj; |
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if (!persistable.isPersistent()) |
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{ |
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makePersistent(persistable); |
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addedObjects.add(persistable.getPersistentObject()); |
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} |
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enhance(obj, addedObjects); |
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return addedObjects; |
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} |
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private void enhance(Object obj, Set addedObjects) |
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{ |
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enhance(obj, obj.getClass(), addedObjects); |
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} |
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private void enhance(Object obj, Class clazz, Set addedObjects) |
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{ |
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Field[] fields = clazz.getDeclaredFields(); |
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enhance(fields, obj, addedObjects); |
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Class superClass = clazz.getSuperclass(); |
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if (superClass != null && superClass != Object.class && superClass != NonAopPersistable.class) |
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{ |
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enhance(obj, superClass, addedObjects); |
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} |
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Class[] interfaces = clazz.getInterfaces(); |
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for (int i = 0; i < class="keyword">interfaces.length; i++) |
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{ |
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enhance(obj, interfaces[i], addedObjects); |
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} |
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} |
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private void enhance(Field[] fields, Object obj, Set addedObjects) |
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{ |
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for (int i = 0; i < fields.length; i++) |
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{ |
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Field field = fields[i]; |
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if (!field.getType().isPrimitive() && !aopSystem.isAopIntroducedField(field)) |
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{ |
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enhance(field, obj, addedObjects); |
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} |
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} |
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} |
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private void enhance(Field field, Object targetObject, Set addedObjects) |
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{ |
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try |
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{ |
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field.setAccessible(true); |
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Object obj = field.get(targetObject); |
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if (obj != null) |
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{ |
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if (!(obj instanceof Persistable)) |
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{ |
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throw new NotPersistableException("Object of type " + obj.getClass().getName() + " is not persistable"); |
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} |
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Persistable persistable = (Persistable) obj; |
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PersistentObject persistentObject = persistable.getPersistentObject(); |
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if (persistentObject == null) |
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{ |
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if (log.isTraceEnabled()) |
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{ |
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log.trace("Making field " + targetObject.getClass().getName() + "." + field.getName() + " persistent"); |
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} |
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persistentObject = makePersistent(persistable); |
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addedObjects.add(persistentObject); |
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enhance(obj, addedObjects); |
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} |
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} |
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} |
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catch (IllegalAccessException e) |
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{ |
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throw new NotPersistableException("Security permissions do not permit objects of this type (" + field.getType().getName() + ") to be persisted (must have ReflectPermission(\"suppressAccessChecks\") permission)", e); |
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} |
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} |
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private PersistentObject makePersistent(Persistable obj) |
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{ |
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PersistentObject persistentObject; |
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persistentObject = persistentObjectFactory.createPersistentObject(); |
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persistentObject.initializeAsNewObject(obj); |
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obj.setPersistentObject(persistentObject); |
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return persistentObject; |
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} |
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} |