categoryhelper.java

一个免费wap站

package com.eline.wap.resource.client;

import java.util.List;

import com.eline.wap.common.model.Page;
import com.eline.wap.resource.dao.CategoryDAO;
import com.eline.wap.resource.dao.ResourceDAOFactory;
import com.eline.wap.resource.exceptions.ResourceDAOSysException;
import com.eline.wap.resource.exceptions.ResourceException;
import com.eline.wap.resource.model.Category;
import com.eline.wap.resource.model.CategoryCondition;

public class CategoryHelper {
	
	private CategoryDAO dao = null;
	
	public Category getCategory(int categoryId) throws ResourceException {
		try {
			if (dao == null)
				dao = ResourceDAOFactory.getCategoryDAO();
			return dao.getCategory(categoryId);
		} catch (ResourceDAOSysException e) {
			throw new ResourceException(e.getMessage());
		}
	}

	public Page searchCategories(CategoryCondition condition, int start, int count) throws ResourceException {
		try {
			if (dao == null)
				dao = ResourceDAOFactory.getCategoryDAO();
			return dao.searchCategories(condition, start, count);
		} catch (ResourceDAOSysException e) {
			throw new ResourceException(e.getMessage());
		}
	}
	
	public void createCategory(Category item) throws ResourceException {
		try {
			if (dao == null)
				dao = ResourceDAOFactory.getCategoryDAO();
			dao.createCategory(item);
		} catch (ResourceDAOSysException e) {
			throw new ResourceException(e.getMessage());
		}
	}
	
	public void updateCategory(Category item) throws ResourceException {
		try {
			if (dao == null)
				dao = ResourceDAOFactory.getCategoryDAO();
			dao.updateCategory(item);
		} catch (ResourceDAOSysException e) {
			throw new ResourceException(e.getMessage());
		}
	}

	public void deleteCategory(int categoryId) throws ResourceException {
		try {
			if (dao == null)
				dao = ResourceDAOFactory.getCategoryDAO();
			dao.deleteCategory(categoryId);
		} catch (ResourceDAOSysException e) {
			throw new ResourceException(e.getMessage());
		}
	}
	
	/*public void buildCategoryXmlTree(int type) throws ResourceException {
		try {
			// 获取所有的指定类型的类目(按parentId排序)
			if (dao == null)
				dao = ResourceDAOFactory.getCategoryDAO();
			List list = dao.getCategoriesForXmlTree(type);

			// 建立xml文档
			DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
			Document doc = builder.newDocument();

			Element categories = doc.createElement("categories");
			doc.appendChild(categories);

			// 建立根目录
			Element rootCategory = doc.createElement("category");
			rootCategory.setAttribute("id", "0");
			rootCategory.setAttribute("title", "书籍目录");
			rootCategory.setAttribute("type", ""+0);
			categories.appendChild(rootCategory);

			// 将List中记录转换成xml节点
			for (int i = 0; i < list.size(); i++) {
				Category item = (Category) list.get(i);
				Element parent = null;
				// 获取父节点
				NodeList nodes = categories.getElementsByTagName("category");
				for (int j = 0; j < nodes.getLength(); j ++) {
					Element e1 = (Element) nodes.item(j);
					if (e1.getAttribute("id") != null && e1.getAttribute("id").equals("" + item.getParentId())) {
						parent = e1;
					}
				}
				if (parent == null)	// sorry, we have to ignore this node. because can't found their parent node.
					continue;
				Element category = doc.createElement("category");
				category.setAttribute("id", ""+item.getIndexId());
				category.setAttribute("title", item.getDisplayTitle());
				category.setAttribute("type", ""+item.getCategoryAttribute());
				parent.appendChild(category);
			}
			String xmlBodyOut = XMLUtils.toXmlString(doc.getDocumentElement());
			System.out.println("buildCategoryXmlTree: xmlBody=" + xmlBodyOut);

		} catch (Exception e) {
			e.printStackTrace();
			throw new ResourceException(e.getMessage());
		}
	}*/
	
	public List getCategoriesForXmlTree(int type) throws ResourceException {
		try {
			if (dao == null)
				dao = ResourceDAOFactory.getCategoryDAO();
			return dao.getCategoriesForXmlTree(type);

		} catch (ResourceDAOSysException e) {
			throw new ResourceException(e.getMessage());
		}
	}
	/*
	public String buildCategoryXmlTree(int type) throws ResourceException {
		try {
			// 获取所有的指定类型的类目(按parentId排序)
			if (dao == null)
				dao = ResourceDAOFactory.getCategoryDAO();
			List list = dao.getCategoriesForXmlTree(type);

			// 建立xml文档
			DocumentBuilder builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
			Document doc = builder.newDocument();

			Element frameTable = doc.createElement("table");
			frameTable.setAttribute("cellspacing", "0");
			frameTable.setAttribute("cellpadding", "0");
			frameTable.setAttribute("border", "0");
			frameTable.setAttribute("width", "300");
			doc.appendChild(frameTable);

			// 建立根目录
			Category rootItem = new Category();
			rootItem.setIndexId(0);
			rootItem.setName("根节点");
			rootItem.setType(Category.TYPE_BOOK);
			frameTable.appendChild(newTreeElement(doc, rootItem));
			System.out.println("STEP 1:"+XMLUtils.toXmlString(frameTable));

			// 将List中记录转换成xml节点
			for (int i = 0; i < list.size(); i++) {
				Category item = (Category) list.get(i);
				Element parent = null;

				// 获取父节点
				NodeList nodes = frameTable.getElementsByTagName("td");
				for (int j = 0; j < nodes.getLength(); j ++) {
					Element e1 = (Element) nodes.item(j);
					if (e1.getAttribute("id") != null && e1.getAttribute("id").equals("t_" + item.getParentId())) {
						parent = e1;
					}
				}
				
				if (parent == null)	// sorry, we have to ignore this node. because can't found their parent node.
					continue;
				parent.appendChild(newTreeElement(doc, item));
			}
			String xmlBodyOut = XMLUtils.toXmlString(doc.getDocumentElement());
			System.out.println("buildCategoryXmlTree: xmlBody=" + xmlBodyOut);

			return xmlBodyOut;

		} catch (Exception e) {
			e.printStackTrace();
			throw new ResourceException(e.getMessage());
		}
	}

	public Element newTreeElement(Document doc, Category item) throws Exception {
		// 框架表
		Element table = doc.createElement("table");
		table.setAttribute("cellspacing", "0");
		table.setAttribute("cellpadding", "0");
		table.setAttribute("border", "0");
		table.setAttribute("width", "100%");
		
		// 第一个tr: 按钮
		Element tr1 = doc.createElement("tr");
		table.appendChild(tr1);
		Element td1 = doc.createElement("td");
		td1.setAttribute("onclick", "javascript:treeViewItem_onclick(" + item.getIndexId() + ")");
		tr1.appendChild(td1);
		Text t1 = doc.createTextNode(item.getDisplayTitle());
		td1.appendChild(t1);
		System.out.println("OK");

		// 第二个tr: 子菜单
		Element tr2 = doc.createElement("tr");
		table.appendChild(tr2);
		Element td2 = doc.createElement("td");
		td2.setAttribute("id", "t_" + item.getIndexId());
		td2.setAttribute("style", "display: none");
		tr2.appendChild(td2);
		
		return table;
	}*/
}