genericmanagerimpl.java

对XML和DB的CURD的基本操作.使用的两个比较常用的组合设计模式：MVC模式+DAO模式。

package com.mycompany.myapp.service.impl;

import java.io.Serializable;
import java.util.List;

import com.mycompany.myapp.dao.GenericDao;
import com.mycompany.myapp.service.GenericManager;

/**
 * This class serves as the Base class for all other Managers - namely to hold
 * common CRUD methods that they might all use. You should only need to extend
 * this class when your require custom CRUD logic.
 *
 * @param <T> a type variable
 * @param <PK> the primary key for that type
 */
public class GenericManagerImpl<T, PK extends Serializable> implements GenericManager<T, PK> {
    /**
     * GenericDao instance, set by constructor of this class
     */
    protected GenericDao<T, PK> genericDao;

   /* *//**
     * Public constructor for creating a new GenericManagerImpl.
     * @param genericDao the GenericDao to use for persistence
     */
    public GenericManagerImpl(final GenericDao<T, PK> genericDao) {
        this.genericDao = genericDao;
    }

    public void setGenericDao(GenericDao<T, PK> genericDao) {
        this.genericDao = genericDao;
    }

    /**
     * {@inheritDoc}
     */
    public List<T> getAll() {
        return genericDao.getAll();
    }
    
    /**
     * {@inheritDoc}
     */
    public T get(PK id) {
        return genericDao.get(id);
    }

    /**
     * {@inheritDoc}
     */
    public T insert(T object) {
        return genericDao.insert(object);
    }
    
    /**
     * {@inheritDoc}
     */
    public T update(T object) {
    	return genericDao.update(object);
    }

    /**
     * {@inheritDoc}
     */
    public void remove(PK id) {
        genericDao.remove(id);
    }
}