From 5f30a827fc84af1e54f0716a49995e98a044ebd6 Mon Sep 17 00:00:00 2001
From: Stefan Suhren <suhren.stefan@fh-swf.de>
Date: Sun, 13 Dec 2015 22:07:46 +0100
Subject: Add editing capabilities

---
 src/beans/CategoryManager.java | 205 ++++++++++++++++++++++++++++-------------
 src/beans/ProductManager.java  | 174 +++++++++++++++++++++++++---------
 2 files changed, 272 insertions(+), 107 deletions(-)

(limited to 'src')

diff --git a/src/beans/CategoryManager.java b/src/beans/CategoryManager.java
index 005b399..cfa8bba 100644
--- a/src/beans/CategoryManager.java
+++ b/src/beans/CategoryManager.java
@@ -24,66 +24,147 @@ import jpa.EntityManagerFactorySingleton;
 
 @ManagedBean(name = "CategoryManager")
 @SessionScoped
-public class CategoryManager
-{
-   private Category current;
-
-   public Category getCurrent()
-   {
-      return current;
-   }
-
-   public void setCurrent(Category current)
-   {
-      this.current = current;
-   }
-
-   public Collection getCategories()
-   {
-      EntityManager manager = EntityManagerFactorySingleton.getInstance()
-            .getEntityManagerFactory().createEntityManager();
-
-      Collection categories = manager.createQuery("SELECT c FROM Category c ")
-            .getResultList();
-      manager.close();
-
-      return categories;
-   }
-
-   public void select(javax.faces.event.ActionEvent actionEvent)
-   {
-      FacesContext facesContext = FacesContext.getCurrentInstance();
-      Map params = facesContext.getExternalContext().getRequestParameterMap();
-      Integer selectedId = Integer.valueOf((String) params.get("selectedId"));
-      // System.out.println(selectedId);
-
-      EntityManager manager = EntityManagerFactorySingleton.getInstance()
-            .getEntityManagerFactory().createEntityManager();
-
-      EntityTransaction tx = manager.getTransaction();
-      tx.begin();
-      try
-      {
-         current = manager.find(Category.class, selectedId);
-         // System.out.println(current.getName());
-         tx.commit();
-      }
-      catch (Exception ex)
-      {
-         ex.printStackTrace(System.err);
-         tx.rollback();
-      }
-
-      FacesContext context = FacesContext.getCurrentInstance();
-      try
-      {
-         context.getExternalContext().redirect("products.jsf");
-      }
-      catch (IOException e)
-      {
-         e.printStackTrace();
-      }
-      context.responseComplete();
-      manager.close();
-   }
+public class CategoryManager {
+	private Category current;
+
+	public Category getCurrent() {
+		return current;
+	}
+
+	public void setCurrent(Category current) {
+		this.current = current;
+	}
+
+	public Collection getCategories() {
+		EntityManager manager = EntityManagerFactorySingleton.getInstance().getEntityManagerFactory()
+				.createEntityManager();
+
+		Collection categories = manager.createQuery("SELECT c FROM Category c ").getResultList();
+		manager.close();
+
+		return categories;
+	}
+
+	public void select(javax.faces.event.ActionEvent actionEvent) {
+		FacesContext facesContext = FacesContext.getCurrentInstance();
+		Map params = facesContext.getExternalContext().getRequestParameterMap();
+		Integer selectedId = Integer.valueOf((String) params.get("selectedId"));
+		// System.out.println(selectedId);
+
+		EntityManager manager = EntityManagerFactorySingleton.getInstance().getEntityManagerFactory()
+				.createEntityManager();
+
+		EntityTransaction tx = manager.getTransaction();
+		tx.begin();
+		try {
+			current = manager.find(Category.class, selectedId);
+			// System.out.println(current.getName());
+			tx.commit();
+		} catch (Exception ex) {
+			ex.printStackTrace(System.err);
+			tx.rollback();
+		}
+
+		FacesContext context = FacesContext.getCurrentInstance();
+		try {
+			context.getExternalContext().redirect("products.jsf");
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		context.responseComplete();
+		manager.close();
+	}
+
+	public void edit(javax.faces.event.ActionEvent actionEvent) {
+		FacesContext context = FacesContext.getCurrentInstance();
+		Map<String, String> params = context.getExternalContext().getRequestParameterMap();
+		Integer selectedId = Integer.valueOf((String) params.get("selectedId"));
+		// System.out.println(selectedId);
+
+		EntityManager manager = EntityManagerFactorySingleton.getInstance().getEntityManagerFactory()
+				.createEntityManager();
+
+		EntityTransaction tx = manager.getTransaction();
+		tx.begin();
+		try {
+			current = manager.find(Category.class, selectedId);
+			// System.out.println(current.getName());
+			tx.commit();
+		} catch (Exception ex) {
+			ex.printStackTrace(System.err);
+			tx.rollback();
+		}
+
+		try {
+			context.getExternalContext().redirect("category.jsf");
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		context.responseComplete();
+	}
+
+	public void deleteCurrentCategory(javax.faces.event.ActionEvent actionEvent) {
+		FacesContext context = FacesContext.getCurrentInstance();
+
+		EntityManager manager = EntityManagerFactorySingleton.getInstance().getEntityManagerFactory()
+				.createEntityManager();
+		EntityTransaction tx = manager.getTransaction();
+		tx.begin();
+		try {
+			current = manager.find(Category.class, current.getId());
+			manager.remove(current);
+			current = null;
+
+			tx.commit();
+		} catch (Exception ex) {
+			ex.printStackTrace(System.err);
+			if (tx.isActive())
+				tx.rollback();
+		}
+
+		try {
+			context.getExternalContext().redirect("categories.jsf");
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		context.responseComplete();
+	}
+
+	public void createCategory() {
+		current = new Category();
+
+		FacesContext context = FacesContext.getCurrentInstance();
+
+		try {
+			context.getExternalContext().redirect("category.jsf");
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		context.responseComplete();
+	}
+
+	public void saveCategory() {
+		EntityManager manager = EntityManagerFactorySingleton.getInstance().getEntityManagerFactory()
+				.createEntityManager();
+
+		EntityTransaction tx = manager.getTransaction();
+		try {
+			tx.begin();
+			current = manager.merge(current);
+
+			tx.commit();
+		} catch (Exception ex) {
+			ex.printStackTrace(System.err);
+			tx.rollback();
+		}
+
+		FacesContext context = FacesContext.getCurrentInstance();
+
+		try {
+			context.getExternalContext().redirect("categories.jsf");
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		context.responseComplete();
+	}
 }
diff --git a/src/beans/ProductManager.java b/src/beans/ProductManager.java
index 4910fff..b9e5bfb 100644
--- a/src/beans/ProductManager.java
+++ b/src/beans/ProductManager.java
@@ -17,56 +17,140 @@ import javax.faces.bean.SessionScoped;
 import javax.faces.context.FacesContext;
 import javax.persistence.EntityManager;
 import javax.persistence.EntityTransaction;
+import javax.servlet.http.HttpSession;
 
+import jpa.Category;
 import jpa.EntityManagerFactorySingleton;
 import jpa.Product;
 
 @ManagedBean(name = "ProductManager")
 @SessionScoped
-public class ProductManager
-{
-   private Product current;
-
-   public Product getCurrent()
-   {
-      return current;
-   }
-
-   public void select(javax.faces.event.ActionEvent actionEvent)
-   {
-      FacesContext facesContext = FacesContext.getCurrentInstance();
-      Map params = facesContext.getExternalContext().getRequestParameterMap();
-      int selectedId = Integer.valueOf((String) params.get("selectedId"), 10);
-      // System.out.println(selectedId);
-
-      EntityManager manager = EntityManagerFactorySingleton.getInstance()
-            .getEntityManagerFactory().createEntityManager();
-
-      EntityTransaction tx = manager.getTransaction();
-      tx.begin();
-      try
-      {
-         current = manager.find(Product.class, selectedId);
-
-         tx.commit();
-      }
-      catch (Exception ex)
-      {
-         ex.printStackTrace(System.err);
-         tx.rollback();
-      }
-
-      FacesContext context = FacesContext.getCurrentInstance();
-      try
-      {
-         context.getExternalContext().redirect("product.jsf");
-      }
-      catch (IOException e)
-      {
-         e.printStackTrace();
-      }
-      context.responseComplete();
-      manager.close();
-   }
+public class ProductManager {
+	private Product current;
 
+	public Product getCurrent() {
+		return current;
+	}
+
+	public void select(javax.faces.event.ActionEvent actionEvent) {
+		FacesContext context = FacesContext.getCurrentInstance();
+		Map params = context.getExternalContext().getRequestParameterMap();
+		int selectedId = Integer.valueOf((String) params.get("selectedId"), 10);
+		// System.out.println(selectedId);
+
+		EntityManager manager = EntityManagerFactorySingleton.getInstance().getEntityManagerFactory()
+				.createEntityManager();
+
+		EntityTransaction tx = manager.getTransaction();
+		tx.begin();
+		try {
+			current = manager.find(Product.class, selectedId);
+
+			tx.commit();
+		} catch (Exception ex) {
+			ex.printStackTrace(System.err);
+			tx.rollback();
+		}
+
+		try {
+			context.getExternalContext().redirect("product.jsf");
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		context.responseComplete();
+		manager.close();
+	}
+
+	public void saveCurrentProduct() {
+		FacesContext context = FacesContext.getCurrentInstance();
+
+		EntityManager manager = EntityManagerFactorySingleton.getInstance().getEntityManagerFactory()
+				.createEntityManager();
+
+		EntityTransaction tx = manager.getTransaction();
+		HttpSession session = (HttpSession) FacesContext.getCurrentInstance().getExternalContext().getSession(false);
+		CategoryManager cm = (CategoryManager) session.getAttribute("CategoryManager");
+		try {
+			tx.begin();
+
+			current = manager.merge(current);
+			cm.setCurrent(manager.find(Category.class, cm.getCurrent().getId()));
+
+			Category cat = manager.find(Category.class, cm.getCurrent().getId());
+			cat.getProducts().add(current);
+
+			manager.merge(cat);
+			cm.setCurrent(manager.find(Category.class, cm.getCurrent().getId()));
+
+			tx.commit();
+		} catch (Exception ex) {
+			ex.printStackTrace(System.err);
+			if (tx.isActive()) {
+				tx.rollback();
+			}
+		}
+
+		try {
+			context.getExternalContext().redirect("products.jsf");
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		context.responseComplete();
+		manager.close();
+	}
+
+	public void newProduct() {
+		current = new Product();
+
+		FacesContext context = FacesContext.getCurrentInstance();
+
+		try {
+			context.getExternalContext().redirect("product.jsf");
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		context.responseComplete();
+	}
+
+	public void deleteProduct(javax.faces.event.ActionEvent actionEvent) {
+
+		FacesContext context = FacesContext.getCurrentInstance();
+		Map params = context.getExternalContext().getRequestParameterMap();
+		int selectedId = Integer.valueOf((String) params.get("selectedId"), 10);
+		// System.out.println(selectedId);
+
+		EntityManager manager = EntityManagerFactorySingleton.getInstance().getEntityManagerFactory()
+				.createEntityManager();
+		HttpSession session = (HttpSession) FacesContext.getCurrentInstance().getExternalContext().getSession(false);
+		CategoryManager cm = (CategoryManager) session.getAttribute("CategoryManager");
+
+		EntityTransaction tx = manager.getTransaction();
+		tx.begin();
+		try {
+			current = manager.find(Product.class, selectedId);
+			Category ca = manager.find(Category.class, cm.getCurrent().getId());
+
+			ca.getProducts().remove(current);
+			manager.merge(ca);
+
+			if (current.getCategories().isEmpty()) {
+				manager.remove(current);
+				current = null;
+			}
+
+			cm.setCurrent(manager.find(Category.class, cm.getCurrent().getId()));
+			tx.commit();
+		} catch (Exception ex) {
+			ex.printStackTrace(System.err);
+			tx.rollback();
+		}
+
+		try {
+			context.getExternalContext().redirect("products.jsf");
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		context.responseComplete();
+		manager.close();
+	}
 }
-- 
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