productbean.java

一个ssh结构组成 的BS开发

package cn.hxex.library.view.bean;

import java.util.ArrayList;
import java.util.List;

import cn.hxex.library.exception.LibraryException;
import cn.hxex.library.model.Category;
import cn.hxex.library.model.Product;
import cn.hxex.library.view.util.FacesUtils;
import cn.hxex.library.view.util.ViewUtils;

public class ProductBean extends BaseBean
{

	private String id;
	private String name;
	private String description;
	private String categoryId;

	private List productBeans = new ArrayList();

	public String getCategoryId()
	{
		return categoryId;
	}

	public void setCategoryId(String categoryId)
	{
		this.categoryId = categoryId;
	}

	public String getDescription()
	{
		return description;
	}

	/**
	 * @param description
	 *            The description to set.
	 */
	public void setDescription(String description)
	{
		this.description = description;
	}

	/**
	 * @return Returns the id.
	 */
	public String getId()
	{
		return id;
	}

	/**
	 * @param id
	 *            The id to set.
	 */
	public void setId(String id)
	{
		this.id = id;
	}

	/**
	 * @return Returns the name.
	 */
	public String getName()
	{
		return name;
	}

	/**
	 * @param name
	 *            The name to set.
	 */
	public void setName(String name)
	{
		this.name = name;
	}

	/**
	 * @return Returns the productBeans.
	 */
	public List getProductBeans()
	{
		return productBeans;
	}

	/**
	 * @param productBeans
	 *            The productBeans to set.
	 */
	public void setProductBeans(List productBeans)
	{
		this.productBeans = productBeans;
	}

	protected void init()
	{
		try
		{
			queryProducts();
		}
		catch( LibraryException ex )
		{
			
		}
	}

	/**
	 * Backing bean action to create a new product.
	 * 
	 * @return the navigation result
	 */
	public String createAction()
	{
		this.logger.info("Product createAction is invoked!");

		try
		{
			Product product = convertToProduct();
			Category category = this.getServiceLocator().getCategoryService()
					.getCategory(this.categoryId);
			product.setCategory(category);

			this.getServiceLocator().getProductService().saveProduct(product);

			// remove the productBean inside the cache
			this.logger.info("remove ProductBean from cache");
			FacesUtils.resetManagedBean(BeanNames.PRODUCT_BEAN);

			String params[] = { this.name };
			FacesUtils.addInfoMessageById("productBean_create_product_success",
					params);

			return NavigationResults.SUCCESS;
		}
		catch (LibraryException e)
		{
			FacesUtils.addErrorMessageById(e.getMessage());
			return NavigationResults.RETRY;
		}
	}

	public String editAction()
	{
		if (this.id != null)
		{
			try
			{
				Product product = this.getServiceLocator().getProductService()
						.getProduct(this.id);
				converToProductBean(this, product);
				return NavigationResults.PRODUCT_EDIT;
			}
			catch (LibraryException ex)
			{
				FacesUtils.addErrorMessageById(ex.getMessage());
			}
		}
		return NavigationResults.PRODUCT_LIST;
	}

	public String updateAction()
	{
		try
		{
			Product product = convertToProduct();

			Category category = this.getServiceLocator().getCategoryService()
					.getCategory(this.categoryId);
			product.setCategory(category);

			this.getServiceLocator().getProductService().updateProduct(product);

			String params[] = { this.name };
			FacesUtils.addInfoMessageById("productBean_update_product_success",
					params);

			queryProducts();
			return NavigationResults.PRODUCT_LIST;
		}
		catch (LibraryException e)
		{
			FacesUtils.addErrorMessageById(e.getMessage());
			return NavigationResults.RETRY;
		}
	}

	public String deleteAction()
	{
		this.logger.info("Product deleteAction is invoked!");

		try
		{
			this.getServiceLocator().getProductService().deleteProduct(this.id);

			FacesUtils.addInfoMessageById("productBean_delete_product_success");

			queryProducts();
		}
		catch (LibraryException ex)
		{
			FacesUtils.addErrorMessageById(ex.getMessage());
		}

		return NavigationResults.PRODUCT_LIST;
	}

	/**
	 * Backing bean action to search productBeans by category.
	 * 
	 * @return the navigation result
	 */
	public String listByCategoryAction()
	{
		this.logger.info("Product listByCategoryAction is invoked!");

		return NavigationResults.PRODUCT_LIST;
	}

	private Product convertToProduct()
	{
		Product product = new Product();
		product.setId(this.id);
		product.setName(this.name);
		product.setDescription(this.description);

		return product;
	}

	public static ProductBean converToProductBean(ProductBean productBean,
			Product product)
	{
		productBean.setId(product.getId());
		productBean.setName(product.getName());
		productBean.setDescription(product.getDescription());
		productBean.setCategoryId(product.getCategory().getId());
		return productBean;
	}

	private void queryProducts() throws LibraryException
	{
		if( this.categoryId==null )
			return;
		
		Category category = this.getServiceLocator().getCategoryService().getCategory(categoryId);
		
		this.setProductBeans( ViewUtils.convertToList( category.getProducts() ) );
	}
}