productserviceimpl.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 cn.hxex.library.dao.ProductDao;
import cn.hxex.library.exception.LibraryException;
import cn.hxex.library.model.Category;
import cn.hxex.library.model.Product;
import cn.hxex.library.service.ProductService;

public class ProductServiceImpl implements ProductService
{

	private ProductDao productDao;
	
	
	/**
	 * @return Returns the productDao.
	 */
	public ProductDao getProductDao()
	{
		return productDao;
	}

	/**
	 * @param productDao The productDao to set.
	 */
	public void setProductDao(ProductDao productDao)
	{
		this.productDao = productDao;
	}

	public Product saveProduct(Product product) throws LibraryException
	{
		List list = this.productDao.getProducts( product.getName(), product.getCategory().getId() );
		if( !list.isEmpty() )
		{
			throw LibraryException.getDuplicateProductNameException();
		}
		return this.productDao.saveProduct( product );
	}

	public Product updateProduct(Product product) throws LibraryException
	{
		List list = this.productDao.getProducts( product.getName(), product.getCategory().getId() );
		if( list.size()>1 || (list.size()==1 && !((Product)list.get( 0 ) ).getId().equals( product.getId() ) ) )
		{
			throw LibraryException.getDuplicateProductNameException();
		}
		Product p = getProduct( product.getId() );
		p.setName( product.getName() );
		p.setDescription( product.getDescription() );
		p.setCategory( product.getCategory() );
		return this.productDao.updateProduct( p );
	}

	public Product deleteProduct(String productId) throws LibraryException
	{
		Product product = getProduct( productId );
		Category category = product.getCategory();
		category.getProducts().remove( product );
		this.getProductDao().deleteProduct( product );
		return product;
	}

	public Product getProduct(String productId) throws LibraryException
	{
		Product product = this.productDao.getProduct( productId );
		if( product==null )
		{
			throw LibraryException.getProductNotExistException();
		}
		return product;
	}

}