| /******************************************************************************* |
| * 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; |
| |
| import org.eclipse.equinox.p2.ql.IExpression; |
| import org.eclipse.equinox.p2.ql.IEvaluationContext; |
| |
| public final class MultiVariableContext implements IEvaluationContext { |
| private final IEvaluationContext parentContext; |
| |
| private final Object[] values; |
| |
| public MultiVariableContext(IEvaluationContext parentContext, IExpression[] variables) { |
| this.parentContext = parentContext; |
| values = new Object[variables.length * 2]; |
| for (int idx = 0, ndx = 0; ndx < variables.length; ++ndx, idx += 2) |
| values[idx] = variables[ndx]; |
| } |
| |
| public Object getParameter(int position) { |
| return parentContext.getParameter(position); |
| } |
| |
| public Object getParameter(String key) { |
| return parentContext.getParameter(key); |
| } |
| |
| public Object getValue(IExpression variable) { |
| for (int idx = 0; idx < values.length; ++idx) |
| if (values[idx++] == variable) |
| return values[idx]; |
| return parentContext.getValue(variable); |
| } |
| |
| public void setValue(IExpression variable, Object value) { |
| for (int idx = 0; idx < values.length; ++idx) |
| if (values[idx++] == variable) { |
| values[idx] = value; |
| return; |
| } |
| parentContext.setValue(variable, value); |
| } |
| } |