001/**
002 * Copyright (C) 2006-2025 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.tools.validator;
017
018import java.io.File;
019import java.util.Arrays;
020import java.util.List;
021import java.util.stream.Stream;
022
023import org.apache.xbean.finder.AnnotationFinder;
024import org.talend.sdk.component.api.exception.ComponentException;
025import org.talend.sdk.component.tools.ComponentValidator.Configuration;
026import org.talend.sdk.component.tools.validator.Validators.ValidatorHelper;
027
028import lombok.extern.slf4j.Slf4j;
029
030@Slf4j
031public class ExceptionValidator implements Validator {
032
033    private final Validators.ValidatorHelper helper;
034
035    private final Configuration configuration;
036
037    public ExceptionValidator(final ValidatorHelper helper, final Configuration configuration) {
038        this.helper = helper;
039        this.configuration = configuration;
040    }
041
042    @Override
043    public Stream<String> validate(final AnnotationFinder finder, final List<Class<?>> components) {
044        final ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
045        final Stream<String> errorsException = helper
046                .componentClassFiles()
047                .flatMap(f -> streamClassesInDirectory(classLoader, null, f))
048                .filter(ComponentException.class::isAssignableFrom)
049                .map(e -> e.getName()
050                        + " inherits from ComponentException, this will lead to ClassNotFound errors in some environments. Use instead ComponentException directly!");
051        if (configuration.isFailOnValidateExceptions()) {
052            return errorsException;
053        } else {
054            errorsException.forEach(e -> log.error(e));
055        }
056
057        return Stream.empty();
058    }
059
060    private Stream<Class> streamClassesInDirectory(final ClassLoader loader, final String pckg, final File classFile) {
061        if (classFile.isDirectory()) {
062            return Arrays
063                    .stream(classFile.listFiles())
064                    .flatMap(f -> streamClassesInDirectory(loader, nextPackage(pckg, classFile.getName()), f));
065        }
066
067        if (classFile.getName().endsWith(".class")) {
068            final String className = classFile.getName().substring(0, classFile.getName().lastIndexOf("."));
069            final String completeName = pckg + className;
070            try {
071                return Stream.of(loader.loadClass(completeName));
072            } catch (final Exception e) {
073                log.error("Could not load class : " + completeName + "=>" + e.getMessage());
074            }
075        }
076
077        return Stream.empty();
078    }
079
080    private String nextPackage(final String current, final String next) {
081        return current == null ? "" : current + next + ".";
082    }
083}