lite.beans.MethodPersistenceDelegate Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of litebeans Show documentation
Libraries for Elasticsearch
The newest version!
/* 
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 lite.beans;

import java.lang.reflect.Method;

/**
 * Persistence delegate for {@link java.lang.reflect.Method} class.
 */
class MethodPersistenceDelegate extends PersistenceDelegate {
    @Override
    protected Expression instantiate(Object oldInstance, Encoder out) {
        // should not be null or have a type other than Method
        assert oldInstance instanceof Method : oldInstance;
        Method oldMethod = (Method) oldInstance;
        Class declClass = oldMethod.getDeclaringClass();
        return new Expression(oldMethod, declClass, "getMethod", //$NON-NLS-1$
                new Object[] { oldMethod.getName(), oldMethod.getParameterTypes() });
    }

    @Override
    protected void initialize(Class type, Object oldInstance, Object newInstance, Encoder out) {
        // check for consistency
        assert oldInstance instanceof Method : oldInstance;
        assert newInstance instanceof Method : newInstance;
        assert newInstance.equals(oldInstance);
    }

    @Override
    protected boolean mutatesTo(Object oldInstance, Object newInstance) {
        assert oldInstance instanceof Method : oldInstance;
        if (!(newInstance instanceof Method)) {
            // if null or not a Method
            return false;
        }
        return oldInstance.equals(newInstance);
    }
}