/*
 * Copyright 2017, TeamDev Ltd. All rights reserved.
 *
 * Redistribution and use in source and/or binary forms, with or without
 * modification, must retain the above copyright notice and the following
 * disclaimer.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package io.spine.tools.protodoc;

import org.slf4j.Logger;

import java.io.IOException;
import java.nio.file.FileVisitResult;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;

import static org.slf4j.LoggerFactory.getLogger;

/**
 * A {@code FileVisitor} for formatting files.
 *
 * @author Dmytro Grankin
 */
class FormattingFileVisitor extends SimpleFileVisitor<Path> {

    private final JavadocFormatter formatter;

    FormattingFileVisitor(JavadocFormatter formatter) {
        this.formatter = formatter;
    }

    @Override
    public FileVisitResult visitFile(Path path, BasicFileAttributes attrs) throws IOException {
        log().debug("Performing formatting for the file: {}", path);
        formatter.format(path);
        return FileVisitResult.CONTINUE;
    }

    @Override
    public FileVisitResult visitFileFailed(Path file, IOException exc) throws IOException {
        log().error("Error walking down the file tree for file: {}", file);
        return FileVisitResult.TERMINATE;
    }

    private static Logger log() {
        return LogSingleton.INSTANCE.value;
    }

    private enum LogSingleton {
        INSTANCE;
        @SuppressWarnings("NonSerializableFieldInSerializableClass")
        private final Logger value = getLogger(FormattingFileVisitor.class);
    }
}

/*
 * Copyright 2018, TeamDev Ltd. All rights reserved.
 *
 * Redistribution and use in source and/or binary forms, with or without
 * modification, must retain the above copyright notice and the following
 * disclaimer.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package io.spine.tools.protodoc;

import org.slf4j.Logger;

import java.io.IOException;
import java.nio.file.FileVisitResult;
import java.nio.file.Path;
import java.nio.file.SimpleFileVisitor;
import java.nio.file.attribute.BasicFileAttributes;

import static org.slf4j.LoggerFactory.getLogger;

/**
 * A {@code FileVisitor} for formatting files.
 *
 * @author Dmytro Grankin
 */
class FormattingFileVisitor extends SimpleFileVisitor<Path> {

    private final JavadocFormatter formatter;

    FormattingFileVisitor(JavadocFormatter formatter) {
        super();
        this.formatter = formatter;
    }

    @Override
    public FileVisitResult visitFile(Path path, BasicFileAttributes attrs) throws IOException {
        log().debug("Performing formatting for the file: {}", path);
        formatter.format(path);
        return FileVisitResult.CONTINUE;
    }

    @Override
    public FileVisitResult visitFileFailed(Path file, IOException exc) {
        log().error("Error walking down the file tree for file: {}", file);
        return FileVisitResult.TERMINATE;
    }

    private static Logger log() {
        return LogSingleton.INSTANCE.value;
    }

    private enum LogSingleton {
        INSTANCE;
        @SuppressWarnings("NonSerializableFieldInSerializableClass")
        private final Logger value = getLogger(FormattingFileVisitor.class);
    }
}

Call `super`, remove not thrown exception decl.