com.sangupta.jerry.hibernate.interceptors.UserTimeStampedModelInterceptor.java Source code

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Here is the source code for com.sangupta.jerry.hibernate.interceptors.UserTimeStampedModelInterceptor.java

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/**
 *
 * jerry - Common Java Functionality
 * Copyright (c) 2012, Sandeep Gupta
 * 
 * http://www.sangupta/projects/jerry
 * 
 * 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 com.sangupta.jerry.hibernate.interceptors;

import java.io.Serializable;
import java.util.Date;

import org.hibernate.EmptyInterceptor;
import org.hibernate.type.Type;

import com.sangupta.jerry.domain.UserTimeStampedModel;
import com.sangupta.jerry.security.SecurityContext;

/**
 * A hibernate-interceptor that intercepts calls to the Hibernate framework
 * and populate the last updated user fields as defined in the 
 * @author sangupta
 *
 */
public class UserTimeStampedModelInterceptor extends EmptyInterceptor {

    /**
     * Generated via Eclipse
     */
    private static final long serialVersionUID = -613609435007727874L;

    /**
     * Interceptor method called on every save operation to set the last udpated
     * user and timestamp on entities that implement the {@link UserTimeStampedModel} contract.
     * 
     * @param entity
     * @param id
     * @param state
     * @param propertyNames
     * @param types
     * @return
     */
    @Override
    public boolean onSave(Object entity, Serializable id, Object[] state, String[] propertyNames, Type[] types) {
        if (entity instanceof UserTimeStampedModel) {
            UserTimeStampedModel pmo = (UserTimeStampedModel) entity;
            pmo.setLastUpdatedTime(new Date());
            pmo.setLastUpdatedUser(SecurityContext.getPrincipal().getName());
        }

        return super.onSave(entity, id, state, propertyNames, types);
    }

    /**
     * Interceptor method called on every update operation to set the last udpated
     * user and timestamp on entities that implement the {@link UserTimeStampedModel} contract.
     * 
     * @param entity
     * @param id
     * @param currentState
     * @param previousState
     * @param propertyNames
     * @param types
     * @return
     */
    @Override
    public boolean onFlushDirty(Object entity, Serializable id, Object[] currentState, Object[] previousState,
            String[] propertyNames, Type[] types) {
        if (entity instanceof UserTimeStampedModel) {
            UserTimeStampedModel pmo = (UserTimeStampedModel) entity;
            pmo.setLastUpdatedTime(new Date());
            pmo.setLastUpdatedUser(SecurityContext.getPrincipal().getName());
        }

        return super.onFlushDirty(entity, id, currentState, previousState, propertyNames, types);
    }

}