|
1 package org.demo;
2 import java.util.Collection  ;
3 import javax.annotation.Resource;
4 import javax.faces.application.FacesMessage;
5 import javax.faces.context.FacesContext;
6 import javax.persistence.EntityManager;
7 import javax.persistence.EntityManagerFactory;
8 import javax.persistence.PersistenceUnit;
9 import javax.persistence.Query;
10 import javax.transaction.UserTransaction ;
11
12 public class DiscountCodeController {
13
14 private DiscountCode discountCode;
15
16 @Resource
17 private UserTransaction utx;
18
19 @PersistenceUnit(unitName = "SjsasJSFTestPU")
20 private EntityManagerFactory emf;
21
22 private EntityManager getEntityManager() {
23 return emf.createEntityManager();
24 }
25
26 private int batchSize = 20;
27
28 private int firstItem = 0;
29
30 public String createSetup() {
31 this.discountCode = new DiscountCode();
32 return "discountCode_create";
33 }
34
35 public String create() {
36 EntityManager em = getEntityManager();
37 try {
38 utx.begin();
39 em.persist(discountCode);
40 utx.commit();
41 addSuccessMessage("DiscountCode was successfully created.");
42 } catch (Exception ex) {
43 try {
44 addErrorMessage(ex.getLocalizedMessage());
45 utx.rollback();
46 } catch (Exception e) {
47 addErrorMessage(e.getLocalizedMessage());
48 }
49 }
50 em.close();
51 return "discountCode_list";
52 }
53
54 public String detailSetup() {
55 setDiscountCodeFromRequestParam();
56 return "discountCode_detail";
57 }
58
59 public String editSetup() {
60 setDiscountCodeFromRequestParam();
61 return "discountCode_edit";
62 }
63
64 public String edit() {
65 EntityManager em = getEntityManager();
66 try {
67 utx.begin();
68 discountCode = em.merge(discountCode);
69 utx.commit();
70 addSuccessMessage("DiscountCode was successfully updated.");
71 } catch (Exception ex) {
72 try {
73 addErrorMessage(ex.getLocalizedMessage());
74 utx.rollback();
75 } catch (Exception e) {
76 addErrorMessage(e.getLocalizedMessage());
77 }
78 }
79 em.close();
80 return "discountCode_list";
81 }
82
83 public String destroy() {
84 EntityManager em = getEntityManager();
85 try {
86 utx.begin();
87 DiscountCode discountCode = getDiscountCodeFromRequestParam();
88 discountCode = em.merge(discountCode);
89 em.remove(discountCode);
90 utx.commit();
91 addSuccessMessage("DiscountCode was successfully deleted.");
92 } catch (Exception ex) {
93 try {
94 addErrorMessage(ex.getLocalizedMessage());
95 utx.rollback();
96 } catch (Exception e) {
97 addErrorMessage(e.getLocalizedMessage());
98 }
99 }
100 em.close();
101 return "discountCode_list";
102 }
103
104 public DiscountCode getDiscountCodeFromRequestParam() {
105 EntityManager em = getEntityManager();
106 String param = FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("discountCode");
107 String id = param;
108 DiscountCode o = em.find(DiscountCode.class, id);
109 em.close();
110 return o;
111 }
112
113 public void setDiscountCodeFromRequestParam() {
114 DiscountCode discountCode = getDiscountCodeFromRequestParam();
115 setDiscountCode(discountCode);
116 }
117
118 public Collection getDiscountCodes() {
119 EntityManager em = getEntityManager();
120 Query q = em.createQuery("select object(o) from DiscountCode as o");
121 q.setMaxResults(batchSize);
122 q.setFirstResult(firstItem);
123 Collection c = q.getResultList();
124 em.close();
125 return c;
126 }
127
128 public DiscountCode getDiscountCode() {
129 return discountCode;
130 }
131
132 public void setDiscountCode(DiscountCode discountCode) {
133 this.discountCode = discountCode;
134 }
135
136 public static void addErrorMessage(String msg) {
137 FacesMessage facesMsg = new FacesMessage(FacesMessage.SEVERITY_ERROR, msg, msg);
138 FacesContext fc = FacesContext.getCurrentInstance();
139 fc.addMessage(null, facesMsg);
140 }
141
142 public static void addSuccessMessage(String msg) {
143 FacesMessage facesMsg = new FacesMessage(FacesMessage.SEVERITY_INFO, msg, msg);
144 FacesContext fc = FacesContext.getCurrentInstance();
145 fc.addMessage("successInfo", facesMsg);
146 }
147
148 public DiscountCode findDiscountCode(String id) {
149 EntityManager em = getEntityManager();
150 DiscountCode o = (DiscountCode) em.find(DiscountCode.class, id);
151 em.close();
152 return o;
153 }
154
155 public int getItemCount() {
156 EntityManager em = getEntityManager();
157 int count = ((Long ) em.createQuery("select count(o) from DiscountCode as o").getSingleResult()).intValue();em.close();
158 return count;
159 }
160
161 public int getFirstItem() {
162 return firstItem;
163 }
164
165 public int getLastItem() {
166 int size = getItemCount();
167 return firstItem + batchSize > size ? size : firstItem + batchSize;
168 }
169
170 public int getBatchSize() {
171 return batchSize;
172 }
173
174 public String next() {
175 if (firstItem + batchSize < getItemCount()) {
176 firstItem += batchSize;
177 }
178 return "discountCode_list";
179 }
180
181 public String prev() {
182 firstItem -= batchSize;
183 if (firstItem < 0) {
184 firstItem = 0;
185 }
186 return "discountCode_list";
187 }
188 }
189 |
Popular Tags |
Java API By Example, From Geeks To Geeks.