categoryserviceimpl.java

库存管理系统：这是在Eclipse环境下开发的

package cn.hxex.library.service.impl;

import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.dao.DataIntegrityViolationException;

import cn.hxex.library.dao.CategoryDao;
import cn.hxex.library.exception.LibraryException;
import cn.hxex.library.model.Category;
import cn.hxex.library.service.CategoryService;

/**
 * CategoryService的实现类
 * 
 * @author galaxy
 *
 */
public class CategoryServiceImpl implements CategoryService
{
	//	the logger for this class
	private Log logger = LogFactory.getLog(this.getClass());
	
	private CategoryDao categoryDao;

	/**
	 * @return Returns the categoryDao.
	 */
	public CategoryDao getCategoryDao()
	{
		return categoryDao;
	}

	/**
	 * @param categoryDao The categoryDao to set.
	 */
	public void setCategoryDao(CategoryDao categoryDao)
	{
		this.categoryDao = categoryDao;
	}


	public Category saveCategory(Category category)
		throws LibraryException
	{
		try
		{
			Category c = this.getCategoryDao().saveCategory( category );
			return c;
		}
		catch( DataIntegrityViolationException de )
		{
			throw LibraryException.getDuplicateCategoryNameException();
		}
		catch( Exception e )
		{
			String msg = "Could not save category " + e.toString();
			this.logger.error(msg, e);
			
			throw new LibraryException(msg, e);
		}
	}

	public List getAllCategorys()
	{
		return this.categoryDao.getAllCategorys();
	}

	public void deleteCategory( String categoryId ) throws LibraryException
	{
		Category category = getCategory( categoryId );
		if( !category.getProducts().isEmpty() )
		{
			throw LibraryException.getCategoryExistProductException();
		}
		
		this.categoryDao.deleteCategory( category );
	}

	public Category getCategory( String categoryId )
			throws LibraryException
	{
		Category category = this.categoryDao.getCategory( categoryId );
		if( category==null )
		{
			throw LibraryException.getCategoryNotExistException();
		}
		return category;
	}

	public Category updateCategory(Category category) throws LibraryException
	{
		try
		{
			Category c = this.getCategoryDao().updateCategory( category );
			return c;
		}
		catch( DataIntegrityViolationException de )
		{
			throw LibraryException.getDuplicateCategoryNameException();
		}
		catch( Exception e )
		{
			String msg = "Could not save category " + e.toString();
			this.logger.error(msg, e);
			
			throw new LibraryException(msg, e);
		}
	}
}