| /******************************************************************************* |
| * Copyright (c) 2009, 2014 Xored Software 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: |
| * Xored Software Inc - initial API and implementation and/or initial documentation |
| *******************************************************************************/ |
| package org.eclipse.rcptt.ecl.internal.commands; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.rcptt.ecl.core.BoxedValue; |
| import org.eclipse.rcptt.ecl.core.Command; |
| import org.eclipse.rcptt.ecl.core.CoreFactory; |
| import org.eclipse.rcptt.ecl.core.If; |
| import org.eclipse.rcptt.ecl.core.Let; |
| import org.eclipse.rcptt.ecl.runtime.BoxedValues; |
| import org.eclipse.rcptt.ecl.runtime.ICommandService; |
| import org.eclipse.rcptt.ecl.runtime.IProcess; |
| import org.eclipse.rcptt.ecl.runtime.ISession; |
| |
| public class IfService implements ICommandService { |
| |
| public IStatus service(Command command, IProcess context) |
| throws InterruptedException, CoreException { |
| if (!(command instanceof If)) { |
| return Status.CANCEL_STATUS; |
| } |
| |
| If iff = (If) command; |
| ISession session = context.getSession(); |
| boolean condition = false; |
| if(iff.getCondition() instanceof BoxedValue) { |
| condition = BoxedValues.toBoolean((BoxedValue) iff.getCondition()); |
| } |
| Command branch = condition ? iff.getThen() : iff.getElse(); |
| if (branch == null) { |
| return Status.OK_STATUS; // nothing to do |
| } |
| return session.execute(wrapBody(branch), context.getInput(), context.getOutput()) |
| .waitFor(); |
| } |
| |
| private static Command wrapBody(Command body) { |
| Let let = CoreFactory.eINSTANCE.createLet(); |
| let.setBody(body); |
| return let; |
| } |
| |
| } |