SwingMetawidget，值未绑定到 JComboBox
SwingMetawidget, value not getting bound to JComboBox
我正在使用 SwingMetawidget。我的数据结构有一个 Person class，其中一个属性是 Title，它也是一个 class，具有从 Person 到 Title。
我正在尝试在 MetaWidget 中获得一个 JComboBox ，其值为 Title 绑定。我正在获取通过查找指定的值列表，但在编辑模式下未选择检查 object 中的值。在只读模式下，显示正确的值（我设置了一个从标题到 String 的转换器）。
我的代码如下。我错过了什么？
显示标题的只读模式：
编辑模式，但未选择值"Mr"：
编辑模式，显示所有查找值：
主要 Class:
public class MetaWidgetFrame extends JFrame {
private JPanel contentPane;
private SwingMetawidget metawidget = new SwingMetawidget();
private JPanel contentPanel;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
MetaWidgetFrame frame = new MetaWidgetFrame();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public MetaWidgetFrame() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 473, 281);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
contentPanel = new JPanel();
contentPane.add(contentPanel, BorderLayout.CENTER);
JPanel controlsPanel = new JPanel();
contentPanel.setLayout(new BorderLayout(0, 0));
contentPane.add(controlsPanel, BorderLayout.SOUTH);
JButton btnSave = new JButton("Save");
btnSave.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
savePerson();
}
});
controlsPanel.add(btnSave);
// Set up the objects
Person person = new Person();
person.setUserID(new Integer(1));
person.setFirstName("Raman");
person.setLastName("C V");
Title title = new Title();
title.setTitleId(new Integer(1));
title.setName("Mr");
// Configure Inspectors
CompositeInspectorConfig inspectorConfig = new CompositeInspectorConfig().setInspectors(
new JpaInspector()
, new PropertyTypeInspector()
,new MetawidgetAnnotationInspector()
);
BeansBindingProcessorConfig bbpc = new BeansBindingProcessorConfig();
// Set up the converter from Title to String
bbpc.setConverter(Title.class, String.class, new Converter<Title,String>() {
@Override
public String convertForward(Title title) {
return title.getName();
}
@Override
public Title convertReverse(String title) {
if ( title == null || "".equals( title ) ) {
return null;
}
Title titleObj = new Title(title,null,null,1,1);
return titleObj;
}
});
BeansBindingProcessor bbp = new BeansBindingProcessor(bbpc);
metawidget.setInspector( new CompositeInspector( inspectorConfig ) );
metawidget.addWidgetProcessor(new ReflectionBindingProcessor());
metawidget.addWidgetProcessor(bbp);
GridBagLayoutConfig gbc = new GridBagLayoutConfig();
gbc.setLabelAlignment(SwingConstants.RIGHT);
gbc.setRequiredText("");
gbc.setRequiredAlignment(SwingConstants.RIGHT);
gbc.setLabelSuffix(": ");
GridBagLayout gbl = new GridBagLayout(gbc);
metawidget.setMetawidgetLayout(gbl);
metawidget.setToInspect(person);
contentPanel.add(metawidget, BorderLayout.CENTER);
JXLabel hintLabel = new JXLabel("New label");
contentPanel.add(hintLabel, BorderLayout.NORTH);
JGoodiesValidatorProcessorIMPL jgProcessor = new JGoodiesValidatorProcessorIMPL().setHintLabel(hintLabel);
metawidget.addWidgetProcessor(jgProcessor);
//add a component to show validation messages
JComponent validationResultsComponent = jgProcessor.getValidationResultsComponent();
JPanel errorsPanel = new JPanel(new BorderLayout(0, 0));
contentPanel.add(errorsPanel, BorderLayout.SOUTH);
errorsPanel.add(validationResultsComponent,BorderLayout.CENTER);
pack();
}
public void savePerson() {
JGoodiesValidatorProcessorIMPL validationProcessor = metawidget.getWidgetProcessor(JGoodiesValidatorProcessorIMPL.class);
ValidationResult result = validationProcessor.showValidationErrors().getValidationResults();
if (!result.hasErrors()) {
metawidget.getWidgetProcessor(BeansBindingProcessor.class).save(metawidget );
Person personSaved = metawidget.getToInspect();
System.out.println("" + personSaved);
}
pack();
}
public JPanel getContentPanel() {
return contentPanel;
}
}
人 Class:
@Entity
@Table(name = "person", catalog = "mydb")
public class Person {
private Integer userID;
private Title title;
private String firstName;
private String lastName;
public Person() {
}
@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "userID", unique = true, nullable = false)
public Integer getUserID() {
return userID;
}
@UiLookup (value={"Mr","Ms","Miss","Mrs"})
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "titleID", nullable = false)
public Title getTitle() {
return this.title;
}
@Column(name = "firstName", nullable = false, length = 10)
public String getFirstName() {
return firstName;
}
@UiSection ("Others")
@Column(name = "lastName", nullable = false, length = 45)
public String getLastName() {
return lastName;
}
public void setUserID(Integer userID) {
this.userID = userID;
}
public void setTitle(Title title) {
this.title = title;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
@Override
public String toString() {
return "Person: "
+ "\n userID = " + userID
+ "\n title = " + title
+ "\n titleID = " + title.getTitleId()
+ "\n firstName = " + firstName
+ "\n lastName = " + lastName;
}
}
标题Class:
@Entity
@Table(name = "title", catalog = "emisdb")
public class Title implements java.io.Serializable {
private Integer titleId;
private String name;
private Date createdDate;
private Date modifiedDate;
private int createdBy;
private int modifiedBy;
private Set<User> users = new HashSet<User>(0);
public Title() {
}
@Override
public String toString() {
return name;
}
public Title(String name, Date createdDate, Date modifiedDate, int createdBy, int modifiedBy) {
this.name = name;
this.createdDate = createdDate;
this.modifiedDate = modifiedDate;
this.createdBy = createdBy;
this.modifiedBy = modifiedBy;
}
public Title(String name, Date createdDate, Date modifiedDate, int createdBy, int modifiedBy, Set<User> users) {
this.name = name;
this.createdDate = createdDate;
this.modifiedDate = modifiedDate;
this.createdBy = createdBy;
this.modifiedBy = modifiedBy;
this.users = users;
}
@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "titleID", unique = true, nullable = false)
public Integer getTitleId() {
return this.titleId;
}
public void setTitleId(Integer titleId) {
this.titleId = titleId;
}
@Column(name = "name", nullable = false, length = 4)
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
@UiHidden
@Temporal(TemporalType.TIMESTAMP)
@Column(name = "createdDate", nullable = false, length = 19)
public Date getCreatedDate() {
return this.createdDate;
}
public void setCreatedDate(Date createdDate) {
this.createdDate = createdDate;
}
@UiHidden
@Temporal(TemporalType.TIMESTAMP)
@Column(name = "modifiedDate", nullable = false, length = 19)
public Date getModifiedDate() {
return this.modifiedDate;
}
public void setModifiedDate(Date modifiedDate) {
this.modifiedDate = modifiedDate;
}
@UiHidden
@Column(name = "createdBy", nullable = false)
public int getCreatedBy() {
return this.createdBy;
}
public void setCreatedBy(int createdBy) {
this.createdBy = createdBy;
}
@UiHidden
@Column(name = "modifiedBy", nullable = false)
public int getModifiedBy() {
return this.modifiedBy;
}
public void setModifiedBy(int modifiedBy) {
this.modifiedBy = modifiedBy;
}
@UiHidden
@OneToMany(fetch = FetchType.LAZY, mappedBy = "title")
public Set<User> getUsers() {
return this.users;
}
public void setUsers(Set<User> users) {
this.users = users;
}
}
感谢您对 Metawidget 的关注！
您的代码存在许多一般性问题，从微不足道到概念上的重要问题。 None 其中本身就是 Metawidget 问题。我会尝试将它们分解：
小问题
在 MetaWidgetFrame 中你创建了 person = new Person() 和 title = new Title() 但你忘记了 person.setTitle( title ).
概念上重要 1
根据您的代码，如果您尝试：
Title title1 = new Title();
title1.setTitleId(new Integer(1));
title1.setName("Mr");
Title title2 = new Title();
title2.setTitleId(new Integer(1));
title2.setName("Mr");
System.out.println( title1 == title1 ); // will return true
System.out.println( title1.equals( title2 )); // will return false
您可以看到两个具有相同字段的 Title object 不会使用 object 等价（equals 方法）进行匹配。 BeansBinding 和大多数 Java 技术依赖于 object 等价性。所以你需要重写 equals 和 Title 的 hashCode 方法。
概念上重要 2
在您的 Converter 中，您试图通过简单地执行以下操作将字符串 ('Mr') 转换为 Title object：
titleObj = new Title(title,null,null,1,1);
这会将 name 设置为 title，但其他字段未初始化 (null) 或初始化为任意值 (1)。特别是 id 未初始化。根据您如何实现 equals 和 hashCode 方法（见上文），这意味着它们永远不会匹配从数据库返回的记录。
结论
我修复了所有这 3 个问题，并且代码按预期工作。但是，您的具体实施会有所不同。特别是您可能需要在 Converter 中进行数据库查找。或者，理想情况下，每个 session 执行一次数据库查找并缓存标题列表 objects.
顺便说一句，Title 上的 OneToMany 可能是 over-normalized（即会导致大量数据库连接）。您最好将 Title 作为字符串存储在每个 Person 中。您仍然可以使用 Title object，以便您可以配置数据库中可能的标题列表。
我正在使用 SwingMetawidget。我的数据结构有一个 Person class，其中一个属性是 Title，它也是一个 class，具有从 Person 到 Title。
我正在尝试在 MetaWidget 中获得一个 JComboBox ，其值为 Title 绑定。我正在获取通过查找指定的值列表，但在编辑模式下未选择检查 object 中的值。在只读模式下，显示正确的值（我设置了一个从标题到 String 的转换器）。
我的代码如下。我错过了什么？
显示标题的只读模式：
编辑模式，但未选择值"Mr"：
编辑模式，显示所有查找值：
主要 Class:
public class MetaWidgetFrame extends JFrame {
private JPanel contentPane;
private SwingMetawidget metawidget = new SwingMetawidget();
private JPanel contentPanel;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
MetaWidgetFrame frame = new MetaWidgetFrame();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public MetaWidgetFrame() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 473, 281);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
contentPane.setLayout(new BorderLayout(0, 0));
setContentPane(contentPane);
contentPanel = new JPanel();
contentPane.add(contentPanel, BorderLayout.CENTER);
JPanel controlsPanel = new JPanel();
contentPanel.setLayout(new BorderLayout(0, 0));
contentPane.add(controlsPanel, BorderLayout.SOUTH);
JButton btnSave = new JButton("Save");
btnSave.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
savePerson();
}
});
controlsPanel.add(btnSave);
// Set up the objects
Person person = new Person();
person.setUserID(new Integer(1));
person.setFirstName("Raman");
person.setLastName("C V");
Title title = new Title();
title.setTitleId(new Integer(1));
title.setName("Mr");
// Configure Inspectors
CompositeInspectorConfig inspectorConfig = new CompositeInspectorConfig().setInspectors(
new JpaInspector()
, new PropertyTypeInspector()
,new MetawidgetAnnotationInspector()
);
BeansBindingProcessorConfig bbpc = new BeansBindingProcessorConfig();
// Set up the converter from Title to String
bbpc.setConverter(Title.class, String.class, new Converter<Title,String>() {
@Override
public String convertForward(Title title) {
return title.getName();
}
@Override
public Title convertReverse(String title) {
if ( title == null || "".equals( title ) ) {
return null;
}
Title titleObj = new Title(title,null,null,1,1);
return titleObj;
}
});
BeansBindingProcessor bbp = new BeansBindingProcessor(bbpc);
metawidget.setInspector( new CompositeInspector( inspectorConfig ) );
metawidget.addWidgetProcessor(new ReflectionBindingProcessor());
metawidget.addWidgetProcessor(bbp);
GridBagLayoutConfig gbc = new GridBagLayoutConfig();
gbc.setLabelAlignment(SwingConstants.RIGHT);
gbc.setRequiredText("");
gbc.setRequiredAlignment(SwingConstants.RIGHT);
gbc.setLabelSuffix(": ");
GridBagLayout gbl = new GridBagLayout(gbc);
metawidget.setMetawidgetLayout(gbl);
metawidget.setToInspect(person);
contentPanel.add(metawidget, BorderLayout.CENTER);
JXLabel hintLabel = new JXLabel("New label");
contentPanel.add(hintLabel, BorderLayout.NORTH);
JGoodiesValidatorProcessorIMPL jgProcessor = new JGoodiesValidatorProcessorIMPL().setHintLabel(hintLabel);
metawidget.addWidgetProcessor(jgProcessor);
//add a component to show validation messages
JComponent validationResultsComponent = jgProcessor.getValidationResultsComponent();
JPanel errorsPanel = new JPanel(new BorderLayout(0, 0));
contentPanel.add(errorsPanel, BorderLayout.SOUTH);
errorsPanel.add(validationResultsComponent,BorderLayout.CENTER);
pack();
}
public void savePerson() {
JGoodiesValidatorProcessorIMPL validationProcessor = metawidget.getWidgetProcessor(JGoodiesValidatorProcessorIMPL.class);
ValidationResult result = validationProcessor.showValidationErrors().getValidationResults();
if (!result.hasErrors()) {
metawidget.getWidgetProcessor(BeansBindingProcessor.class).save(metawidget );
Person personSaved = metawidget.getToInspect();
System.out.println("" + personSaved);
}
pack();
}
public JPanel getContentPanel() {
return contentPanel;
}
}
人 Class:
@Entity
@Table(name = "person", catalog = "mydb")
public class Person {
private Integer userID;
private Title title;
private String firstName;
private String lastName;
public Person() {
}
@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "userID", unique = true, nullable = false)
public Integer getUserID() {
return userID;
}
@UiLookup (value={"Mr","Ms","Miss","Mrs"})
@ManyToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "titleID", nullable = false)
public Title getTitle() {
return this.title;
}
@Column(name = "firstName", nullable = false, length = 10)
public String getFirstName() {
return firstName;
}
@UiSection ("Others")
@Column(name = "lastName", nullable = false, length = 45)
public String getLastName() {
return lastName;
}
public void setUserID(Integer userID) {
this.userID = userID;
}
public void setTitle(Title title) {
this.title = title;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
@Override
public String toString() {
return "Person: "
+ "\n userID = " + userID
+ "\n title = " + title
+ "\n titleID = " + title.getTitleId()
+ "\n firstName = " + firstName
+ "\n lastName = " + lastName;
}
}
标题Class:
@Entity
@Table(name = "title", catalog = "emisdb")
public class Title implements java.io.Serializable {
private Integer titleId;
private String name;
private Date createdDate;
private Date modifiedDate;
private int createdBy;
private int modifiedBy;
private Set<User> users = new HashSet<User>(0);
public Title() {
}
@Override
public String toString() {
return name;
}
public Title(String name, Date createdDate, Date modifiedDate, int createdBy, int modifiedBy) {
this.name = name;
this.createdDate = createdDate;
this.modifiedDate = modifiedDate;
this.createdBy = createdBy;
this.modifiedBy = modifiedBy;
}
public Title(String name, Date createdDate, Date modifiedDate, int createdBy, int modifiedBy, Set<User> users) {
this.name = name;
this.createdDate = createdDate;
this.modifiedDate = modifiedDate;
this.createdBy = createdBy;
this.modifiedBy = modifiedBy;
this.users = users;
}
@Id
@GeneratedValue(strategy = IDENTITY)
@Column(name = "titleID", unique = true, nullable = false)
public Integer getTitleId() {
return this.titleId;
}
public void setTitleId(Integer titleId) {
this.titleId = titleId;
}
@Column(name = "name", nullable = false, length = 4)
public String getName() {
return this.name;
}
public void setName(String name) {
this.name = name;
}
@UiHidden
@Temporal(TemporalType.TIMESTAMP)
@Column(name = "createdDate", nullable = false, length = 19)
public Date getCreatedDate() {
return this.createdDate;
}
public void setCreatedDate(Date createdDate) {
this.createdDate = createdDate;
}
@UiHidden
@Temporal(TemporalType.TIMESTAMP)
@Column(name = "modifiedDate", nullable = false, length = 19)
public Date getModifiedDate() {
return this.modifiedDate;
}
public void setModifiedDate(Date modifiedDate) {
this.modifiedDate = modifiedDate;
}
@UiHidden
@Column(name = "createdBy", nullable = false)
public int getCreatedBy() {
return this.createdBy;
}
public void setCreatedBy(int createdBy) {
this.createdBy = createdBy;
}
@UiHidden
@Column(name = "modifiedBy", nullable = false)
public int getModifiedBy() {
return this.modifiedBy;
}
public void setModifiedBy(int modifiedBy) {
this.modifiedBy = modifiedBy;
}
@UiHidden
@OneToMany(fetch = FetchType.LAZY, mappedBy = "title")
public Set<User> getUsers() {
return this.users;
}
public void setUsers(Set<User> users) {
this.users = users;
}
}
感谢您对 Metawidget 的关注！
您的代码存在许多一般性问题，从微不足道到概念上的重要问题。 None 其中本身就是 Metawidget 问题。我会尝试将它们分解：
小问题
在 MetaWidgetFrame 中你创建了 person = new Person() 和 title = new Title() 但你忘记了 person.setTitle( title ).
概念上重要 1
根据您的代码，如果您尝试：
Title title1 = new Title();
title1.setTitleId(new Integer(1));
title1.setName("Mr");
Title title2 = new Title();
title2.setTitleId(new Integer(1));
title2.setName("Mr");
System.out.println( title1 == title1 ); // will return true
System.out.println( title1.equals( title2 )); // will return false
您可以看到两个具有相同字段的 Title object 不会使用 object 等价（equals 方法）进行匹配。 BeansBinding 和大多数 Java 技术依赖于 object 等价性。所以你需要重写 equals 和 Title 的 hashCode 方法。
概念上重要 2
在您的 Converter 中，您试图通过简单地执行以下操作将字符串 ('Mr') 转换为 Title object：
titleObj = new Title(title,null,null,1,1);
这会将 name 设置为 title，但其他字段未初始化 (null) 或初始化为任意值 (1)。特别是 id 未初始化。根据您如何实现 equals 和 hashCode 方法（见上文），这意味着它们永远不会匹配从数据库返回的记录。
结论
我修复了所有这 3 个问题，并且代码按预期工作。但是，您的具体实施会有所不同。特别是您可能需要在 Converter 中进行数据库查找。或者，理想情况下，每个 session 执行一次数据库查找并缓存标题列表 objects.
顺便说一句，Title 上的 OneToMany 可能是 over-normalized（即会导致大量数据库连接）。您最好将 Title 作为字符串存储在每个 Person 中。您仍然可以使用 Title object，以便您可以配置数据库中可能的标题列表。