| /******************************************************************************* |
| * 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 picks an keyed parameter from the expression context. |
| */ |
| public final class KeyedParameter extends Parameter { |
| final String key; |
| |
| public KeyedParameter(String key) { |
| this.key = key; |
| } |
| |
| public Object evaluate(ExpressionContext context, VariableScope scope) { |
| return context.getParameter(key); |
| } |
| |
| public void toString(StringBuffer bld) { |
| bld.append('$'); |
| bld.append(key); |
| } |
| } |
