001/**
002 * Copyright (C) 2006-2022 Talend Inc. - www.talend.com
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.talend.sdk.component.junit.environment;
017
018import static java.util.stream.Collectors.toList;
019
020import java.lang.reflect.AnnotatedElement;
021import java.lang.reflect.InvocationTargetException;
022import java.util.Collection;
023import java.util.Optional;
024import java.util.stream.Stream;
025
026import org.junit.platform.commons.util.AnnotationUtils;
027
028public class EnvironmentsConfigurationParser {
029
030    private final Collection<EnvironmentProvider> environments;
031
032    private final boolean parallel;
033
034    public EnvironmentsConfigurationParser(final Class<?> clazz) { // backward compatibility
035        this((AnnotatedElement) clazz);
036    }
037
038    public EnvironmentsConfigurationParser(final AnnotatedElement context) {
039        final Optional<Environments> config = AnnotationUtils.findAnnotation(context, Environments.class);
040        environments = Stream
041                .concat(config.map(Environments::value).map(Stream::of).orElseGet(Stream::empty),
042                        AnnotationUtils
043                                .findAnnotation(context, Environment.class)
044                                .map(Stream::of)
045                                .orElseGet(Stream::empty))
046                .distinct()
047                .map(e -> {
048                    try {
049                        return e.value().getConstructor().newInstance();
050                    } catch (final InstantiationException | IllegalAccessException | NoSuchMethodException ex) {
051                        throw new IllegalStateException(ex);
052                    } catch (final InvocationTargetException ex) {
053                        throw new IllegalStateException(ex.getTargetException());
054                    }
055                })
056                .map(DecoratingEnvironmentProvider::new)
057                .collect(toList());
058        parallel = config.map(Environments::parallel).orElse(false);
059    }
060
061    public Stream<EnvironmentProvider> stream() {
062        final Stream<EnvironmentProvider> stream = environments.stream();
063        if (parallel) {
064            return stream.parallel();
065        }
066        return stream;
067    }
068}