Java Policy类代码示例

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
	ISelection selection = HandlerUtil.getCurrentSelectionChecked(event);
	if(selection.isEmpty())
		return null;
	Collection<IProject> projects = SelectionUtils.getProjects(selection);
	if(!projects.isEmpty()){
		try {
			CodeScannerView view = (CodeScannerView) PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().showView(CodeScannerView.ID);
			if(view != null){
				view.scan(projects);
			}
		} catch (PartInitException e) {
		   Policy.logException(e);
		}
	}
	return null;
	
}
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
private boolean warnAddingTraits(
        Shell shell, TreeNode tgt, Set<String> addingTraits) {
    final String title = "Adding traits";
    final S msg = new S();
    msg.addf("The source entry has more traits than the target one. ");
    msg.addf("To proceed, the following traits:%n");

    List<String> traitList = new ArrayList<>(addingTraits);
    traitList.sort(Policy.getComparator());

    for(String tr: addingTraits) {
        msg.addf("%s%n", tr);
    }
    
    msg.addf("%nwill be added to the target%n");
    msg.addf("%s .%n", tgt.path());

    msg.addf("%nDo you want to do so?");
    return MessageDialog.openConfirm(shell, title, msg.toString());
}
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
/**
 * Create the area for extra error support information.
 * 
 * @param parent
 */
private void createSupportArea(Composite parent) {

	ErrorSupportProvider provider = Policy.getErrorSupportProvider();

	if (provider == null)
		return;

	Composite supportArea = new Composite(parent, SWT.NONE);
	provider.createSupportArea(supportArea, status);

	GridData supportData = new GridData(SWT.FILL, SWT.FILL, true, true);
	supportData.verticalSpan = 3;
	supportArea.setLayoutData(supportData);
	if (supportArea.getLayout() == null){
		GridLayout layout = new GridLayout();
		layout.marginWidth = 0;
		layout.marginHeight = 0;
		supportArea.setLayout(layout); // Give it a default layout if one isn't set
	}


}
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
/**
 * Closes this window.
 * 
 * @return <code>true</code> if the window is (or was already) closed, and
 *         <code>false</code> if it is still open
 */
private boolean hardClose() {
	// inform wizards
	for (int i = 0; i < createdWizards.size(); i++) {
		IWizard createdWizard = (IWizard) createdWizards.get(i);
		try {
			createdWizard.dispose();
		} catch (Exception e) {
			Status status = new Status(IStatus.ERROR, Policy.JFACE, IStatus.ERROR, e.getMessage(), e);
			Policy.getLog().log(status);
		}
		// Remove this dialog as a parent from the managed wizard.
		// Note that we do this after calling dispose as the wizard or
		// its pages may need access to the container during
		// dispose code
		createdWizard.setContainer(null);
	}
	// see https://bugs.eclipse.org/bugs/show_bug.cgi?id=202534
	// disposing the wizards could cause the image currently set in
	// this dialog to be disposed.  A subsequent repaint event during
	// close would then fail.  To prevent this case, we null out the image.
	setTitleImage(null);
	return super.close();
}
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
/**
 * <p>
 * Ascends all of the parents of the scheme until no more parents are found.
 * </p>
 * <p>
 * This method completes in <code>O(n)</code>, where <code>n</code> is the
 * height of the context tree.
 * </p>
 * 
 * @param schemeId
 *            The id of the scheme for which the parents should be found;
 *            may be <code>null</code>.
 * @return The array of scheme ids (<code>String</code>) starting with
 *         <code>schemeId</code> and then ascending through its ancestors.
 */
private final String[] getSchemeIds(String schemeId) {
	final List strings = new ArrayList();
	while (schemeId != null) {
		strings.add(schemeId);
		try {
			schemeId = getScheme(schemeId).getParentId();
		} catch (final NotDefinedException e) {
			Policy.getLog().log(
					new Status(IStatus.ERROR, Policy.JFACE, IStatus.OK,
							"Failed ascending scheme parents", //$NON-NLS-1$
							e));
			return new String[0];
		}
	}

	return (String[]) strings.toArray(new String[strings.size()]);
}
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
/**
 * Closes this window.
 * 
 * @return <code>true</code> if the window is (or was already) closed, and
 *         <code>false</code> if it is still open
 */
private boolean hardClose() {
	// inform wizards
	for (int i = 0; i < createdWizards.size(); i++) {
		IWizard createdWizard = (IWizard) createdWizards.get(i);
		try {
			createdWizard.dispose();
		} catch (Exception e) {
			Status status = new Status(IStatus.ERROR, Policy.JFACE,
					IStatus.ERROR, e.getMessage(), e);
			Policy.getLog().log(status);
		}
		// Remove this dialog as a parent from the managed wizard.
		// Note that we do this after calling dispose as the wizard or
		// its pages may need access to the container during
		// dispose code
		createdWizard.setContainer(null);
	}
	// see https://bugs.eclipse.org/bugs/show_bug.cgi?id=202534
	// disposing the wizards could cause the image currently set in
	// this dialog to be disposed. A subsequent repaint event during
	// close would then fail. To prevent this case, we null out the image.
	setTitleImage(null);
	return super.close();
}
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
/**
  * The <code>Wizard</code> implementation of this <code>IWizard</code>
  * method disposes all the pages controls using
  * <code>DialogPage.dispose</code>. Subclasses should extend this method
  * if the wizard instance maintains addition SWT resource that need to be
  * disposed.
  */
 public void dispose() {
     // notify pages
     for (int i = 0; i < pages.size(); i++) {
try {
          ((IWizardPage) pages.get(i)).dispose();
} catch (Exception e) {
	Status status = new Status(IStatus.ERROR, Policy.JFACE, IStatus.ERROR, e.getMessage(), e);
	Policy.getLog().log(status);
}
     }
     // dispose of image
     if (defaultImage != null) {
         JFaceResources.getResources().destroyImage(defaultImageDescriptor);
         defaultImage = null;
     }
 }
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
/**
 * Asserts that the given array of elements is itself non- <code>null</code>
 * and contains no <code>null</code> elements.
 * 
 * @param elements
 *            the array to check
 */
protected void assertElementsNotNull(Object[] elements) {
	Assert.isNotNull(elements);
	for (int i = 0, n = elements.length; i < n; ++i) {
		Assert.isNotNull(elements[i]);
	}

	if (InternalPolicy.DEBUG_LOG_EQUAL_VIEWER_ELEMENTS
			&& elements.length > 1) {
		CustomHashtable elementSet = newHashtable(elements.length * 2);
		for (int i = 0; i < elements.length; i++) {
			Object element = elements[i];
			Object old = elementSet.put(element, element);
			if (old != null) {
				String message = "Sibling elements in viewer must not be equal:\n  " //$NON-NLS-1$
						+ old + ",\n  " + element; //$NON-NLS-1$
				Policy.getLog().log(
						new Status(IStatus.WARNING, Policy.JFACE, message,
								new RuntimeException()));
				return;
			}
		}
	}
}
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
/**
 * Asserts that the given array of elements is itself non- <code>null</code>
 * and contains no <code>null</code> elements.
 * 
 * @param parent
 *            the parent element
 * @param elements
 *            the array to check
 * 
 * @see #assertElementsNotNull(Object[])
 */
private void assertElementsNotNull(Object parent, Object[] elements) {
	Assert.isNotNull(elements);
	for (int i = 0, n = elements.length; i < n; ++i) {
		Assert.isNotNull(elements[i]);
	}

	if (InternalPolicy.DEBUG_LOG_EQUAL_VIEWER_ELEMENTS
			&& elements.length > 1) {
		CustomHashtable elementSet = newHashtable(elements.length * 2);
		for (int i = 0; i < elements.length; i++) {
			Object element = elements[i];
			Object old = elementSet.put(element, element);
			if (old != null) {
				String message = "Sibling elements in viewer must not be equal:\n  " //$NON-NLS-1$
						+ old
						+ ",\n  " + element + ",\n  parent: " + parent; //$NON-NLS-1$ //$NON-NLS-2$
				Policy.getLog().log(
						new Status(IStatus.WARNING, Policy.JFACE, message,
								new RuntimeException()));
				return;
			}
		}
	}
}
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
public void labelProviderChanged(LabelProviderChangedEvent event) {
 	Control control = getControl();
 	if (control == null || control.isDisposed()) {
if (logWhenDisposed) {
	String message = "Ignored labelProviderChanged notification because control is diposed." + //$NON-NLS-1$
			" This indicates a potential memory leak."; //$NON-NLS-1$
	if (!InternalPolicy.DEBUG_LOG_LABEL_PROVIDER_NOTIFICATIONS_WHEN_DISPOSED) {
		// stop logging after the first
		logWhenDisposed = false;
		message += " This is only logged once per viewer instance," + //$NON-NLS-1$
				" but similar calls will still be ignored."; //$NON-NLS-1$
	}
	Policy.getLog().log(
			new Status(IStatus.WARNING, Policy.JFACE, message,
					new RuntimeException()));
}
 		return;
 	}
 	ContentViewer.this.handleLabelProviderChanged(event);
 }
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
/**
 * Save the values specified in the pages.
 * <p>
 * The default implementation of this framework method saves all pages of
 * type <code>PreferencePage</code> (if their store needs saving and is a
 * <code>PreferenceStore</code>).
 * </p>
 * <p>
 * Subclasses may override.
 * </p>
 */
protected void handleSave() {
	Iterator nodes = preferenceManager.getElements(PreferenceManager.PRE_ORDER).iterator();
	while (nodes.hasNext()) {
		IPreferenceNode node = (IPreferenceNode) nodes.next();
		IPreferencePage page = node.getPage();
		if (page instanceof PreferencePage) {
			// Save now in case tbe workbench does not shutdown cleanly
			IPreferenceStore store = ((PreferencePage) page).getPreferenceStore();
			if (store != null && store.needsSaving()
					&& store instanceof IPersistentPreferenceStore) {
				try {
					((IPersistentPreferenceStore) store).save();
				} catch (IOException e) {
					String message =JFaceResources.format(
                               "PreferenceDialog.saveErrorMessage", new Object[] { page.getTitle(), e.getMessage() }); //$NON-NLS-1$
		            Policy.getStatusHandler().show(
		                    new Status(IStatus.ERROR, Policy.JFACE, message, e),
		                    JFaceResources.getString("PreferenceDialog.saveErrorTitle")); //$NON-NLS-1$
									
				}
			}
		}
	}
}
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
/**
 * The <code>Wizard</code> implementation of this <code>IWizard</code>
 * method disposes all the pages controls using
 * <code>DialogPage.dispose</code>. Subclasses should extend this method if
 * the wizard instance maintains addition SWT resource that need to be
 * disposed.
 */
@Override
public void dispose() {
	super.dispose();
	// notify pages
	for (int i = 0; i < pages.size(); i++) {
		try {
			pages.get(i).dispose();
		} catch (Exception e) {
			Status status = new Status(IStatus.ERROR, Policy.JFACE, IStatus.ERROR, e.getMessage(), e);
			Policy.getLog().log(status);
		}
	}
}
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
private void loadSavedResults() {

		String fileName = getScanResultFileLocation();
		try {
			ScanResult result = RulesJSONProcessor.INSTANCE.fetchResults(fileName);
			results.clear();
			if (result.getRuleResults() != null) {
				for (RuleScanResult ruleResult : result.getRuleResults()) {
					results.put(ruleResult.getRule(),
							ruleResult.getDescriptors());
				}
			}

			tagsViewer.setInput(results.keySet().toArray());
			tagsViewer
					.setSelection(results.isEmpty() ? StructuredSelection.EMPTY
							: new StructuredSelection(results.keySet()
									.iterator().next()));

			loadLbl.setText(Messages.bind(
					Messages.CodeScannerView_SCANRESULTS_TIME,
					DateFormat.getDateTimeInstance().format(
							result.getSearchDate())));

		} catch (FileNotFoundException e) {
			Policy.logException(e);
		}

	}
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
/**
  * The control item implementation of this <code>IContributionItem</code>
  * method calls the <code>createControl</code> framework method to
  * create a control under the given parent, and then creates
  * a new tool item to hold it.
  * Subclasses must implement <code>createControl</code> rather than
  * overriding this method.
  */
public final void fill(ToolBar parent, int index) {
	Control control = createControl(parent);
	if (control == null) {
		Policy.logException(new IllegalStateException("createControl(Composite) of " + getClass() //$NON-NLS-1$
				+ " returned null, cannot fill toolbar")); //$NON-NLS-1$
	} else {
		ToolItem ti = new ToolItem(parent, SWT.SEPARATOR, index);
		ti.setControl(control);
		ti.setWidth(computeWidth(control));
		mainControl = ti;
	}
}
 

import org.eclipse.jface.util.Policy; //导入依赖的package包/类
/**
 * The <code>Wizard</code> implementation of this <code>IWizard</code> method disposes all the pages controls using
 * <code>DialogPage.dispose</code>. Subclasses should extend this method if the wizard instance maintains addition SWT
 * resource that need to be disposed.
 */
public void dispose() {

	// notify pages
	for (int i = 0; i < wizardPages.size(); i++) {
		try {
			((IWizardPage) wizardPages.get(i)).dispose();
		} catch (Exception e) {
			Status status = new Status(IStatus.ERROR, Policy.JFACE, IStatus.ERROR, e.getMessage(), e);
			Policy.getLog().log(status);
		}
	}
	super.dispose();
}