| /******************************************************************************* |
| * Copyright (c) 2009 Cloudsmith Inc. 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: |
| * Cloudsmith Inc. - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.equinox.internal.p2.ql; |
| |
| /** |
| * An expression that yields <code>true</code> when its operand does not. |
| */ |
| public final class Not extends Unary { |
| public static final String OPERATOR = "!"; //$NON-NLS-1$ |
| |
| public Not(Expression operand) { |
| super(operand); |
| } |
| |
| public Object evaluate(ExpressionContext context, VariableScope scope) { |
| return Boolean.valueOf(operand.evaluate(context, scope) != Boolean.TRUE); |
| } |
| |
| String getOperator() { |
| return OPERATOR; |
| } |
| |
| int getPriority() { |
| return ExpressionParser.PRIORITY_NOT; |
| } |
| } |
