Examples with IEvaluationContext org.eclipse.core.expressions.IEvaluationContext used on opensource projects

Example 16 with IEvaluationContext

use of org.eclipse.core.expressions.IEvaluationContext in project eclipse.platform.runtime by eclipse.

the class ExpressionTests method testAdaptExpressionWithNull.

/**
 * Bug 484325
 */
public void testAdaptExpressionWithNull() throws Exception {
    // it's surprisingly difficult to craft an EvaluationContext that
    // provides
    // a defaultVariable == null
    IEvaluationContext testContext = new EvaluationContext(null, new Adaptee());
    testContext.addVariable("nullCarrier", Arrays.asList((Object) null, (Object) null, (Object) null));
    WithExpression withExpression = new WithExpression("nullCarrier");
    IterateExpression iterateExpression = new IterateExpression("and");
    iterateExpression.add(new AdaptExpression("org.eclipse.core.internal.expressions.tests.NotExisting"));
    withExpression.add(iterateExpression);
    EvaluationResult result = withExpression.evaluate(testContext);
    assertTrue(result == EvaluationResult.FALSE);
}

Example 17 with IEvaluationContext

use of org.eclipse.core.expressions.IEvaluationContext in project eclipse.platform.runtime by eclipse.

the class ExpressionTests method testIterateExpressionWithAdapterManager.

public void testIterateExpressionWithAdapterManager() throws Exception {
    final List<Object> result = new ArrayList<>();
    Expression myExpression = new Expression() {

        @Override
        public EvaluationResult evaluate(IEvaluationContext context) throws CoreException {
            result.add(context.getDefaultVariable());
            return EvaluationResult.FALSE;
        }
    };
    // $NON-NLS-1$
    IterateExpression exp = new IterateExpression("or");
    exp.add(myExpression);
    final List<String> input = new ArrayList<>();
    // $NON-NLS-1$
    input.add("one");
    // $NON-NLS-1$
    input.add("two");
    CollectionWrapper wrapper = new CollectionWrapper();
    wrapper.collection = input;
    EvaluationContext context = new EvaluationContext(null, wrapper);
    assertTrue(EvaluationResult.FALSE == exp.evaluate(context));
    assertTrue(result.equals(input));
}

Example 18 with IEvaluationContext

use of org.eclipse.core.expressions.IEvaluationContext in project polymap4-core by Polymap4.

the class CommonWizardDescriptor method isEnabledFor.

/**
 * Determine if this content extension is enabled for the given selection.
 * The content extension is enabled for the selection if and only if it is
 * enabled for each element in the selection.
 *
 * @param aStructuredSelection
 *            The selection from the viewer
 * @return True if and only if the extension is enabled for each element in
 *         the selection.
 */
public boolean isEnabledFor(IStructuredSelection aStructuredSelection) {
    if (enablement == null) {
        return false;
    }
    IEvaluationContext context = null;
    IEvaluationContext parentContext = NavigatorPlugin.getApplicationContext();
    Iterator elements = aStructuredSelection.iterator();
    while (elements.hasNext()) {
        context = new EvaluationContext(parentContext, elements.next());
        context.setAllowPluginActivation(true);
        if (NavigatorPlugin.safeEvaluate(enablement, context) == EvaluationResult.FALSE) {
            return false;
        }
    }
    return true;
}

Example 19 with IEvaluationContext

use of org.eclipse.core.expressions.IEvaluationContext in project polymap4-core by Polymap4.

the class NavigatorPlugin method getEmptyEvalContext.

/**
 * @return an evaluation context
 */
public static IEvaluationContext getEmptyEvalContext() {
    IEvaluationContext c = new EvaluationContext(getApplicationContext(), Collections.EMPTY_LIST);
    c.setAllowPluginActivation(true);
    return c;
}

Example 20 with IEvaluationContext

use of org.eclipse.core.expressions.IEvaluationContext in project netxms by netxms.

the class ToggleAlarmFilterHandler method execute.

/* (non-Javadoc)
    * @see org.eclipse.core.commands.AbstractHandler#execute(org.eclipse.core.commands.ExecutionEvent)
    */
@Override
public Object execute(ExecutionEvent event) throws ExecutionException {
    Object object = event.getApplicationContext();
    if (object instanceof IEvaluationContext) {
        // $NON-NLS-1$
        Object tab = ((IEvaluationContext) object).getVariable("org.netxms.ui.eclipse.objectview.ActiveTab");
        if ((tab != null) && (tab instanceof AlarmTab)) {
            ICommandService service = (ICommandService) PlatformUI.getWorkbench().getService(ICommandService.class);
            // $NON-NLS-1$
            Command command = service.getCommand("org.netxms.ui.eclipse.alarmviewer.commands.show_filter_alarm_list");
            // $NON-NLS-1$
            State state = command.getState("org.netxms.ui.eclipse.alarmviewer.commands.show_filter_alarm_list.state");
            boolean isChecked = !(Boolean) state.getValue();
            state.setValue(isChecked);
            ((AlarmTab) tab).setFilterEnabled(isChecked);
            service.refreshElements(event.getCommand().getId(), null);
        }
    }
    return null;
}