| /******************************************************************************* |
| * Copyright (c) 2013, 2018 Willink Transformations and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v2.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v20.html |
| * |
| * Contributors: |
| * E.D.Willink - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.ocl.examples.xtext.tests; |
| |
| import java.util.ArrayList; |
| import java.util.Enumeration; |
| import java.util.List; |
| |
| import org.apache.log4j.Appender; |
| import org.apache.log4j.ConsoleAppender; |
| import org.apache.log4j.Level; |
| import org.apache.log4j.Logger; |
| import org.apache.log4j.SimpleLayout; |
| import org.apache.log4j.spi.LoggingEvent; |
| import org.eclipse.jdt.annotation.NonNull; |
| import org.eclipse.jdt.annotation.Nullable; |
| |
| /** |
| * A TestCaseLogger gathers any console output for review at the end of a test. |
| */ |
| public final class TestCaseLogger extends ConsoleAppender |
| { |
| public static final @NonNull TestCaseLogger INSTANCE = new TestCaseLogger(); |
| |
| private static Logger rootLogger = Logger.getRootLogger(); |
| |
| private boolean installed = false; |
| private @NonNull StringBuilder s = new StringBuilder(); |
| |
| private TestCaseLogger() { |
| super(new SimpleLayout(), SYSTEM_OUT); |
| setName("TestCaseLogger"); |
| } |
| |
| @Override |
| public void append(LoggingEvent event) { |
| if (event.getLevel().isGreaterOrEqual(Level.INFO)) { |
| String renderedMessage = event.getRenderedMessage(); |
| s.append(renderedMessage); |
| } |
| // super.append(event); |
| } |
| |
| public void clear() { |
| s.setLength(0); |
| } |
| |
| public String get() { |
| return s.toString(); |
| } |
| |
| public @Nullable Iterable<Appender> install() { |
| List<Appender> removedAppenders = null; |
| if (!installed) { |
| Enumeration<?> allAppenders = rootLogger.getAllAppenders(); |
| while (allAppenders.hasMoreElements()) { |
| Object element = allAppenders.nextElement(); |
| if (element instanceof Appender) { |
| Appender appender = (Appender)element; |
| if (removedAppenders == null) { |
| removedAppenders = new ArrayList<Appender>(); |
| } |
| removedAppenders.add(appender); |
| } |
| } |
| if (removedAppenders != null) { |
| for (Appender appender : removedAppenders) { |
| rootLogger.removeAppender(appender); |
| } |
| } |
| rootLogger.addAppender(this); |
| installed = true; |
| } |
| clear(); |
| return removedAppenders; |
| } |
| |
| public void uninstall(@Nullable Iterable<Appender> removedAppenders) { |
| rootLogger.removeAppender(this); |
| if (removedAppenders != null) { |
| for (Appender appender : removedAppenders) { |
| rootLogger.addAppender(appender); |
| } |
| } |
| installed = false; |
| } |
| } |