| /******************************************************************************* |
| * Copyright (c) 2007 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| ******************************************************************************/ |
| |
| package org.eclipse.ui.internal.expressions; |
| |
| import org.eclipse.core.expressions.EvaluationResult; |
| import org.eclipse.core.expressions.Expression; |
| import org.eclipse.core.expressions.IEvaluationContext; |
| |
| /** |
| * An expression that simply returns <code>true</code> at all times. A shared |
| * instance of this expression is provided. |
| * |
| * @since 3.3 |
| * |
| */ |
| public final class AlwaysEnabledExpression extends Expression { |
| |
| public static final AlwaysEnabledExpression INSTANCE = new AlwaysEnabledExpression(); |
| |
| |
| /** |
| * Not to be instantiated |
| */ |
| private AlwaysEnabledExpression() { |
| } |
| |
| /* |
| * (non-Javadoc) |
| * |
| * @see org.eclipse.core.expressions.Expression#evaluate(org.eclipse.core.expressions.IEvaluationContext) |
| */ |
| public EvaluationResult evaluate(IEvaluationContext context) { |
| return EvaluationResult.TRUE; |
| } |
| } |
