Examples of org.eclipse.ui.IMemento

org.eclipse.ui.IMemento
Interface to a memento used for saving the important state of an object in a form that can be persisted in the file system.
Mementos were designed with the following requirements in mind:
1. Certain objects need to be saved and restored across platform sessions.
2. When an object is restored, an appropriate class for an object might not be available. It must be possible to skip an object in this case.
3. When an object is restored, the appropriate class for the object may be different from the one when the object was originally saved. If so, the new class should still be able to read the old form of the data.
Mementos meet these requirements by providing support for storing a mapping of arbitrary string keys to primitive values, and by allowing mementos to have other mementos as children (arranged into a tree). A robust external storage format based on XML is used.
The key for an attribute may be any alpha numeric value. However, the value of TAG_ID is reserved for internal use.
This interface is not intended to be implemented or extended by clients.
@see IPersistableElement @see IElementFactory

        }
        return list;
    }


    public IMemento createChild( String type, String id ) {
        IMemento found = findChild(type, id);
        if (found == null) {
            found = createChild(type);
            found.putString(TAG_ID, id);
        }
        return found;
    }

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        return found;
    }


    public IMemento findChild( String type, String id ) {
        IMemento[] children = getChildren(type);
        IMemento found = null;
        for( IMemento memento : children ) {
            if( id==null){
                if(memento.getID()==null){
                    found = memento;
                    break;

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            boolean isValid = true;
            //check the required keys
            IConfigurationElement[] requiredKeys = element.getChildren(ATT_REQKEY);
            for (IConfigurationElement key : requiredKeys) {
                String expectedKey = key.getAttribute(ATT_KEY);
                IMemento value = fixerMemento.getChild(expectedKey);
                String value2 = fixerMemento.getString(expectedKey);
                Integer value3 = fixerMemento.getInteger(expectedKey);
                if (value == null && value2 == null && value3 == null) { //failure!
                    isValid = false;
                    break;

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                Browser browser = (Browser)control;
                if(!browser.isDisposed()) {
                    CTabItem item = this.tabMap.get(browser);
                    String listener = this.listenerMap.get(browser);
                    if(item != null && !item.isDisposed() ) {
                        IMemento child = memento.createChild(BROWSER_TYPE);
                        child.putString(BROWSER_NAME, item.getText());
                        child.putString(BROWSER_URL, browser.getUrl());
                        child.putString(BROWSER_LISTENER, listener);
                    }
                }
            }
        }
    }

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    private void assertMementoEquals( UdigMemento memento, UdigMemento readIn, boolean textValNotNull ) {
        assertEquals(2, readIn.getChildren(TYPE).length);
        assertEquals(1, readIn.getChildren(null).length);
        assertEquals(0, readIn.getChildren("boog").length);
        
        IMemento childNoId = readIn.findChild(TYPE, null);
        IMemento childID = readIn.findChild(TYPE, ID1);
        IMemento childNullType = readIn.findChild(null,null);
        
        assertNotNull(childNoId);
        assertNotNull(childID);
        assertNotNull(childNullType);

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   */
  public void save() throws IOException {
    XMLMemento memento = XMLMemento.createWriteRoot(Messages.IssuesListPersister_xmlRootElement);
    for (IIssue issue : this.list) {
      try {
        IMemento child = memento.createChild(MEMENTO_CHILD_TYPE, issue
            .getId());


        child.putString(GROUP_ID, issue.getGroupId());
        child.putString(EXTENSION_ID, issue.getExtensionID());
        child.putString(DESCRIPTION, issue.getDescription());
        child.putString(PRIORITY, issue.getPriority().name());
        child.putString(RESOLUTION, issue.getResolution().name());


        // persist bounds
        ReferencedEnvelope bounds = issue.getBounds();
        child.putString(MIN_X, Double.toString(bounds.getMinX()));
        child.putString(MAX_X, Double.toString(bounds.getMaxX()));
        child.putString(MIN_Y, Double.toString(bounds.getMinY()));
        child.putString(MAX_Y, Double.toString(bounds.getMaxY()));
        child.putString(CRS, bounds.getCoordinateReferenceSystem()
            .toWKT());


        issue.getViewMemento(child.createChild(MEMENTO_VIEW_DATA));
        issue.save(child.createChild(MEMENTO_ISSUE_DATA));
      } catch (Throwable e) {
        IssuesActivator.log("error when daving issue", e); //$NON-NLS-1$
      }
    }
    FileWriter fileWriter = new FileWriter(getLocalIssuesFile());

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          IIssue issue = IssuesListUtil.createIssue(issueMemento
              .getString(EXTENSION_ID));
          if (issue == null) {
            continue;
          }
          IMemento dataMemento = issueMemento
              .getChild(MEMENTO_ISSUE_DATA);
          IMemento viewMemento = issueMemento
              .getChild(MEMENTO_VIEW_DATA);
          String issueId = issueMemento.getID();
          String groupId = issueMemento.getString(GROUP_ID);


          double minX = Double.parseDouble(issueMemento

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                StructuredSelection structuredSelection = (StructuredSelection) paletteTable.getSelection();
                BrewerPalette pal = (BrewerPalette) structuredSelection.getFirstElement();
                if (pal == null) {
                    // get it from the last memento used
                    StyleBlackboard bb = getSelectedLayer().getStyleBlackboard();
                    IMemento memento = (IMemento) bb.get(DialogSettingsStyleContent.EXTENSION_ID);
                    String paletteName = memento.getString(PALETTE_KEY);
                    pal = getBrewer().getPalette(paletteName);
                }
                String paletteName = pal.getName();
                Combo combo = getCombo(COMBO_CLASSES);
                int numClasses = new Integer(combo.getText()).intValue();

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        return ovrIcon.createImage();
    }


    public void gotFocus() {
        StyleBlackboard bb = getSelectedLayer().getStyleBlackboard();
        IMemento memento = (IMemento) bb
                .get(DialogSettingsStyleContent.EXTENSION_ID);
        if (memento != null) {
            setComboSelectionInt(memento, COMBO_OPACITY, OPACITY_KEY);
            setComboSelectionString(memento, COMBO_ATTRIBUTES, ATTRIBUTE_KEY);
            setComboSelectionInt(memento, COMBO_CLASSES, CLASSES_KEY);

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      }
  };
    
    public boolean performApply() {
      StyleBlackboard bb = getSelectedLayer().getStyleBlackboard();
      IMemento memento = (IMemento) bb.get(DialogSettingsStyleContent.EXTENSION_ID);
      if(memento == null ){
        memento = XMLMemento.createWriteRoot("ThemeingData");
      }


      putIntFromCombo(memento, OPACITY_KEY, COMBO_OPACITY);
      putStringFromCombo(memento, ATTRIBUTE_KEY, COMBO_ATTRIBUTES);
      putIntFromCombo(memento, CLASSES_KEY, COMBO_CLASSES);
      putStringFromCombo(memento, BREAK_KEY, COMBO_BREAKTYPE);
      putStringFromCombo(memento, NORMALIZE_KEY, COMBO_NORMALIZE);
      memento.putInteger(ELSE_KEY, getCombo(COMBO_ELSE).getSelectionIndex());
        putStringFromCombo(memento, PALETTE_CATEGORY_KEY, COMBO_PALETTES);


        putButton(memento, BUTTON_COLORBLIND, COLOR_BLIND_KEY);
        putButton(memento, BUTTON_CRT, CRT_KEY);
        putButton(memento, BUTTON_PROJECTOR, PROJECTOR_KEY);

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