com.flysystem.core.adapter.local.FileCommands.java Source code

Introduction

Here is the source code for com.flysystem.core.adapter.local.FileCommands.java

Source

/*
 * Copyright (c) 2013-2015 Frank de Jonge
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is furnished
 * to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.flysystem.core.adapter.local;

import com.flysystem.core.exception.FileExistsException;
import com.flysystem.core.exception.FileNotFoundException;
import com.flysystem.core.exception.FlysystemGenericException;
import com.google.common.io.Files;
import org.apache.commons.io.FileUtils;

import java.io.File;
import java.io.IOException;

/**
 * @author Zeger Hoogeboom
 */
public class FileCommands {
    /**
     * Interface to manipulate something from a source to target file.
     */
    public interface ManipulateFileCommand {
        void execute(File source, File target) throws FlysystemGenericException;
    }

    public static class CopyFileCommand implements ManipulateFileCommand {
        public void execute(File source, File target) {
            try {
                FileUtils.copyFile(source, target);
            } catch (IOException e) {
                throw new FlysystemGenericException(e);
            }
        }
    }

    public static class MoveFileCommand implements ManipulateFileCommand {
        public void execute(File source, File target) {
            try {
                Files.move(source, target);
            } catch (IOException e) {
                throw new FlysystemGenericException(e);
            }
        }
    }

    /**
     *
     * @param local The local filesystem to check existence of files against.
     * @param source Must exists. Throws FileNotFoundException otherwise.
     * @param target Must not exist. Throws FileExistsException otherwise.
     * @param command The command to be executed.
     */
    public static void manipulate(Local local, File source, File target, ManipulateFileCommand command) {
        validateIsFileAndExists(source);
        if (target.exists())
            throw new FileExistsException(target.getPath());
        local.ensureDirectory(target);
        command.execute(source, target);
    }

    private static void validateIsFileAndExists(File file) throws FileNotFoundException {
        if (!file.exists() || !file.isFile())
            throw new FileNotFoundException(file.getPath());
    }
}