我正在使用viewPart的saveState方法保存我的视图状态。以下是我在viewPart中保存数据的代码。
package view;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.TableEditor;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Combo;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.swt.widgets.TableItem;
import org.eclipse.swt.widgets.Text;
import org.eclipse.ui.IMemento;
import org.eclipse.ui.IViewSite;
import org.eclipse.ui.PartInitException;
import org.eclipse.ui.part.ViewPart;
import tutogef.model.Connection;
import tutogef.model.Node;
import tutogef.model.Service;
import tutogef.xml.ThreatTypeXMLToObject;
public class Theartview extends ViewPart implements Serializable {
private static final long serialVersionUID = -3033215443267698138L;
public static String ID = "TutoGEF.theartview_id";
public static String ID1 = "TutoGEF.theartview_id1";
private Table table;
private String Theart_Name;
private String Category_Name;
private String Status_Name;
private String Priority_Name;
private String Descrption_Name;
private String Justification_Name;
private static Node sourceNode;
private static Node targetNode;
private static String connectionType;
private String shortDescription;
private String category;
private String description;
private ThreatTypeXMLToObject threattypexmltoobject;
private Connection conn;
private Text text_1, text_2, text_3, text_4;
private ArrayList<String> list1 = new ArrayList<>();
private HashMap<Integer, String> list2 = new HashMap<>();
// HashMap<Integer, String> list3 = new HashMap<>();
private static Integer a = 0;
private IMemento memento;
// String Key = "Key";
// String Key1 = "Key1";
// String Key2 = "Key2";
// String Key3 = "Key3";
// String Key4 = "Key4";
// String Key5 = "Key5";
// String Key6 = "Key6";
String[] keyValues = { "KeyValue1", "KeyValue2", "KeyValue3", "KeyValue4",
"KeyValue5", "KeyValue6" };
@SuppressWarnings("static-access")
public void getDataOfConnection(Node sourceNode, Node targetNode,
String connectionType1) {
this.sourceNode = sourceNode;
this.targetNode = targetNode;
this.connectionType = connectionType1;
}
public Theartview() {
}
@Override
public void createPartControl(Composite parent) {
parent.setLayout(new GridLayout(10, false));
table = new Table(parent, SWT.BORDER | SWT.FULL_SELECTION);
table.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true, 10, 1));
table.setHeaderVisible(true);
table.setLinesVisible(true);
String[] titles = { "Theart Name", "Category", "Satus", "Priority",
"Description", "Justification" };
for (int i = 0; i < titles.length; i++) {
TableColumn column = new TableColumn(table, SWT.NONE);
column.setWidth(150);
column.setText(titles[i]);
}
if (memento != null) {
System.out.println("Entering Restore State");
restoreState(memento);
}
memento = null;
}
void restoreState(IMemento memento) {
System.out.println("Restore State Entered");
IMemento[] mems = memento.getChildren(ID1);
System.out.println(mems);
for (int q = 0; q < mems.length; q+=3) {
System.out.println("Enter: -----------------------------");
IMemento mem = mems[q];
System.out.println(mems.length);
System.out.println(q);
System.out.println(mem);
TableItem item = new TableItem(table, SWT.NONE);
// for Theart_Name
TableEditor editor = new TableEditor(table);
Text text = new Text(table, SWT.NONE);
editor.grabHorizontal = true;
editor.setEditor(text, item, 0);
text.setText(mem.getString(keyValues[q]));
Theart_Name = text.getText().toString().trim();
// For Category_Name
editor = new TableEditor(table);
text = new Text(table, SWT.NONE);
editor.grabHorizontal = true;
editor.setEditor(text, item, 1);
text.setText(mem.getString(keyValues[q + 1]));
Category_Name = text.getText().toString().trim();
// For Status_Name
editor = new TableEditor(table);
final Combo Status_Combo = new Combo(table, SWT.READ_ONLY);
Status_Combo.add("Mitigated");
Status_Combo.add("Not Applicable");
Status_Combo.add("Not Started");
Status_Combo.add("Needs Investigation");
editor.grabHorizontal = true;
editor.setEditor(Status_Combo, item, 2);
Status_Combo.addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
System.out.println(Status_Combo.getText());
Status_Name = Status_Combo.getText();
}
public void widgetDefaultSelected(SelectionEvent e) {
System.out.println(Status_Combo.getText());
Status_Name = Status_Combo.getText();
}
});
// For Priority_Name
editor = new TableEditor(table);
final Combo priority_Combo = new Combo(table, SWT.NONE);
priority_Combo.add("High");
priority_Combo.add("Medium");
priority_Combo.add("Low");
editor.grabHorizontal = true;
editor.setEditor(priority_Combo, item, 3);
priority_Combo.addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
System.out.println(priority_Combo.getText());
Priority_Name = priority_Combo.getText();
}
public void widgetDefaultSelected(SelectionEvent e) {
System.out.println(priority_Combo.getText());
Priority_Name = priority_Combo.getText();
}
});
// For Descrption_Name
editor = new TableEditor(table);
text = new Text(table, SWT.NONE);
editor.grabHorizontal = true;
editor.setEditor(text, item, 4);
text.setText(mem.getString(keyValues[q + 2]));
Descrption_Name = text.getText().toString().trim();
// For justification
editor = new TableEditor(table);
text = new Text(table, SWT.MULTI | SWT.BORDER | SWT.WRAP
| SWT.V_SCROLL);
editor.grabHorizontal = true;
editor.setEditor(text, item, 5);
Justification_Name = text.getText().toString().trim();
}
}
@SuppressWarnings("static-access")
public void fillTableRoWData() {
if (Connection.Number_Of_Connection != 0) {
// item = new TableItem(table, SWT.NONE);
if (Service.class.isInstance(sourceNode)) {
String id = "S1";
shortDescription = threattypexmltoobject.shortdescription(id,
sourceNode.getName(), targetNode.getName(), null);
category = "Spoofing";
description = threattypexmltoobject.longdescription(id,
sourceNode.getName(), targetNode.getName(), null);
fillRows(shortDescription, category, description);
}
if (Service.class.isInstance(sourceNode)
&& (connectionType == Connection.CONNECTION_DESIGN)) {
String id = "T1";
System.out.println(conn.getConnectionDesign());
shortDescription = threattypexmltoobject.shortdescription(id,
sourceNode.getName(), targetNode.getName(),
conn.getConnectionDesign());
category = "Tampering";
description = threattypexmltoobject.longdescription(id,
sourceNode.getName(), targetNode.getName(),
conn.getConnectionDesign());
fillRows(shortDescription, category, description);
}
}
System.out.println("Hash Map" + list2);
System.out.println("List : []" + list1);
}
@Override
public void setFocus() {
}
private void fillRows(String shortdesc, String categ, String descp) {
TableItem item = new TableItem(table, SWT.NONE);
// for Threat_Name
TableEditor editor = new TableEditor(table);
text_1 = new Text(table, SWT.NONE);
editor.grabHorizontal = true;
editor.setEditor(text_1, item, 0);
text_1.setText(shortdesc);
text_1.addModifyListener(new ModifyListener() {
@Override
public void modifyText(ModifyEvent e) {
System.out.println("Modify Text");
Text text = (Text) e.widget;
System.out.println(text.getText());
}
});
Theart_Name = text_1.getText().toString().trim();
list1.add(Theart_Name);
list2.put(a, Theart_Name);
// For Category_Name
editor = new TableEditor(table);
text_2 = new Text(table, SWT.NONE);
editor.grabHorizontal = true;
editor.setEditor(text_2, item, 1);
text_2.setText(categ);
Category_Name = text_2.getText().toString().trim();
list1.add(Category_Name);
list2.put(++a, Category_Name);
// For Status_Name
editor = new TableEditor(table);
final Combo Status_Combo = new Combo(table, SWT.READ_ONLY);
Status_Combo.add("Mitigated");
Status_Combo.add("Not Applicable");
Status_Combo.add("Not Started");
Status_Combo.add("Needs Investigation");
editor.grabHorizontal = true;
editor.setEditor(Status_Combo, item, 2);
Status_Combo.addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
System.out.println(Status_Combo.getText());
Status_Name = Status_Combo.getText();
list1.add(Status_Name);
list2.put(++a, Status_Name);
}
public void widgetDefaultSelected(SelectionEvent e) {
System.out.println(Status_Combo.getText());
Status_Name = Status_Combo.getText();
}
});
// For Priority_Name
editor = new TableEditor(table);
final Combo priority_Combo = new Combo(table, SWT.NONE);
priority_Combo.add("High");
priority_Combo.add("Medium");
priority_Combo.add("Low");
editor.grabHorizontal = true;
editor.setEditor(priority_Combo, item, 3);
priority_Combo.addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
System.out.println(priority_Combo.getText());
Priority_Name = priority_Combo.getText();
list1.add(Priority_Name);
list2.put(++a, Priority_Name);
}
public void widgetDefaultSelected(SelectionEvent e) {
System.out.println(priority_Combo.getText());
Priority_Name = priority_Combo.getText();
}
});
// For Descrption_Name
editor = new TableEditor(table);
text_3 = new Text(table, SWT.NONE);
editor.grabHorizontal = true;
editor.setEditor(text_3, item, 4);
text_3.setText(descp);
Descrption_Name = text_3.getText().toString().trim();
list1.add(Descrption_Name);
list2.put(++a, Descrption_Name);
// For justification
editor = new TableEditor(table);
text_4 = new Text(table, SWT.MULTI | SWT.BORDER | SWT.WRAP
| SWT.V_SCROLL);
editor.grabHorizontal = true;
editor.setEditor(text_4, item, 5);
Justification_Name = text_4.getText().toString().trim();
list1.add(Justification_Name);
list2.put(++a, Justification_Name);
}
@Override
public void saveState(IMemento memento) {
super.saveState(memento);
System.out.println("Save State Called");
IMemento mem = memento.createChild(ID1);
for (int i = 0; i < 6; i++) {
mem.putString(keyValues[i], list2.get(i));
System.out.println("Hash Map Values: [" + i + "] " + list2.get(i));
System.out.println(mem);
}
}
@Override
public void init(IViewSite site, IMemento memento) throws PartInitException {
super.init(site, memento);
this.memento = memento;
System.out.println("Intialize the view");
}
}
出现以下问题
1）第一次初始化memento时，代码可以正常工作。但是，当我再次打开viewPart而不更改任何数据时，就会发生错误。
2）我所有的值都存储在哈希图中。还原数据时，我只会得到前三个值，其余的值则不会出现。如果我使用数字，那么所有数据都会正确显示。有什么解决办法吗？
3）在我的fillTableRoWData（）方法中，当两个条件都执行时，我所有的侦听器仅处于第二个条件。如何在两个if条件之间移动侦听器。
最佳答案
使用org.eclipse.ui.elementFactories扩展点并实现采用createElement对象的IElementFactory接口的IMemento方法。
如果要创建视图Saveable，则使viewpart实现ISaveablePart