org.sonar.runner.api.Utils.java Source code

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Here is the source code for org.sonar.runner.api.Utils.java

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/*
 * SonarQube Runner - API
 * Copyright (C) 2011-2016 SonarSource SA
 * mailto:contact AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonar.runner.api;

import java.io.Closeable;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.file.FileVisitResult;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;
import java.util.Arrays;
import java.util.Iterator;
import java.util.Properties;

import javax.annotation.Nullable;

class Utils {
    private Utils() {
        // only util static methods
    }

    /**
     * Similar to org.apache.commons.lang.StringUtils#join()
     */
    static String join(String[] array, String delimiter) {
        StringBuilder sb = new StringBuilder();
        Iterator<String> it = Arrays.asList(array).iterator();
        while (it.hasNext()) {
            sb.append(it.next());
            if (!it.hasNext()) {
                break;
            }
            sb.append(delimiter);
        }
        return sb.toString();
    }

    static boolean taskRequiresProject(Properties props) {
        Object task = props.get(RunnerProperties.TASK);
        return task == null || ScanProperties.SCAN_TASK.equals(task);
    }

    static void writeProperties(File outputFile, Properties p) {
        try (OutputStream output = new FileOutputStream(outputFile)) {
            p.store(output, "Generated by sonar-runner");
        } catch (Exception e) {
            throw new IllegalStateException("Fail to export sonar-runner properties", e);
        }
    }

    static void deleteQuietly(File f) {
        try {
            Files.walkFileTree(f.toPath(), new DeleteQuietlyFileVisitor());
        } catch (IOException e) {
            // ignore
        }
    }

    private static class DeleteQuietlyFileVisitor extends SimpleFileVisitor<Path> {
        @Override
        public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) {
            try {
                Files.delete(file);
            } catch (IOException e) {
                // ignore
            }
            return FileVisitResult.CONTINUE;
        }

        @Override
        public FileVisitResult visitFileFailed(Path file, IOException exc) {
            try {
                Files.delete(file);
            } catch (IOException e) {
                // ignore
            }
            return FileVisitResult.CONTINUE;
        }

        @Override
        public FileVisitResult postVisitDirectory(Path dir, IOException exc) {
            try {
                Files.delete(dir);
            } catch (IOException e) {
                // ignore
            }
            return FileVisitResult.CONTINUE;
        }
    }

    static void closeQuietly(@Nullable Closeable c) {
        if (c == null) {
            return;
        }

        try {
            c.close();
        } catch (IOException e) {
            // ignore
        }
    }
}