Java Path Delete nio deleteFilesIfExist(Path... files)

Description

Deletes all given Paths, if they exist.

License

Apache License

Parameter

Parameter	Description
files	files to delete

Declaration

public static void deleteFilesIfExist(Path... files) throws IOException 

Method Source Code

//package com.java2s;
/*//  w  w w .  j  a v a 2s .  c  om
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.IOException;

import java.nio.file.Files;
import java.nio.file.Path;

import java.util.Arrays;
import java.util.Collection;

public class Main {
    /**
     * Deletes all given <tt>Path</tt>s, if they exist.  Some of the
     * <tt>File</tt>s may be null; they are
     * ignored.  After everything is deleted, the method either
     * throws the first exception it hit while deleting, or
     * completes normally if there were no exceptions.
     * 
     * @param files files to delete
     */
    public static void deleteFilesIfExist(Path... files) throws IOException {
        deleteFilesIfExist(Arrays.asList(files));
    }

    /**
     * Deletes all given <tt>Path</tt>s, if they exist.  Some of the
     * <tt>File</tt>s may be null; they are
     * ignored.  After everything is deleted, the method either
     * throws the first exception it hit while deleting, or
     * completes normally if there were no exceptions.
     * 
     * @param files files to delete
     */
    public static void deleteFilesIfExist(Collection<? extends Path> files) throws IOException {
        Throwable th = null;

        for (Path file : files) {
            try {
                if (file != null) {
                    Files.deleteIfExists(file);
                }
            } catch (Throwable t) {
                addSuppressed(th, t);
                if (th == null) {
                    th = t;
                }
            }
        }

        reThrow(th);
    }

    /** adds a Throwable to the list of suppressed Exceptions of the first Throwable
     * @param exception this exception should get the suppressed one added
     * @param suppressed the suppressed exception
     */
    private static void addSuppressed(Throwable exception, Throwable suppressed) {
        if (exception != null && suppressed != null) {
            exception.addSuppressed(suppressed);
        }
    }

    /**
     * Simple utility method that takes a previously caught
     * {@code Throwable} and rethrows either {@code
     * IOException} or an unchecked exception.  If the
     * argument is null then this method does nothing.
     */
    public static void reThrow(Throwable th) throws IOException {
        if (th != null) {
            if (th instanceof IOException) {
                throw (IOException) th;
            }
            reThrowUnchecked(th);
        }
    }

    /**
     * Simple utility method that takes a previously caught
     * {@code Throwable} and rethrows it as an unchecked exception.
     * If the argument is null then this method does nothing.
     */
    public static void reThrowUnchecked(Throwable th) {
        if (th != null) {
            if (th instanceof RuntimeException) {
                throw (RuntimeException) th;
            }
            if (th instanceof Error) {
                throw (Error) th;
            }
            throw new RuntimeException(th);
        }
    }
}

Related

1. deleteFile(Path path)
2. deleteFile(Path path)
3. deleteFile(Path path)
4. deleteFile(String filePath)
5. deleteFile(String path)
6. deleteFilesIgnoringExceptions(final Path... files)
7. deleteFilesRecursively(Path path, final PathMatcher pathMatcher)
8. deleteIfExists(Path thePath)
9. deleteIfExists(Path value)