Java Canonical Path Create getCanonicalFileOrNull(@Nullable final File aFile)

Description

Get the canonical file of the passed file, if the file is not null.

License

Apache License

Parameter

Parameter	Description
aFile	The file to get the canonical path from. May be <code>null</code>.

Return

null if the passed file is null.

Declaration

@Nullable
public static File getCanonicalFileOrNull(@Nullable final File aFile) 

Method Source Code

//package com.java2s;
/**//from ww w. ja v  a  2 s  . c o m
 * Copyright (C) 2014-2015 Philip Helger (www.helger.com)
 * philip[at]helger[dot]com
 *
 * Licensed 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.File;

import java.io.IOException;

import javax.annotation.Nullable;

public class Main {
    /**
     * Get the canonical file of the passed file, if the file is not
     * <code>null</code>. In case of an {@link IOException}, <code>null</code> is
     * returned.
     *
     * @param aFile
     *        The file to get the canonical path from. May be <code>null</code>.
     * @return <code>null</code> if the passed file is <code>null</code>.
     */
    @Nullable
    public static File getCanonicalFileOrNull(@Nullable final File aFile) {
        try {
            return getCanonicalFile(aFile);
        } catch (final IOException ex) {
            return null;
        }
    }

    /**
     * Get the canonical file of the passed file, if the file is not
     * <code>null</code>.
     *
     * @param aFile
     *        The file to get the canonical path from. May be <code>null</code>.
     * @return <code>null</code> if the passed file is <code>null</code>.
     * @throws IOException
     *         If an I/O error occurs, which is possible because the construction
     *         of the canonical pathname may require filesystem queries
     */
    @Nullable
    public static File getCanonicalFile(@Nullable final File aFile) throws IOException {
        return aFile == null ? null : aFile.getCanonicalFile();
    }
}

Related

1. getCanonicalFile(final File file)
2. getCanonicalFile(final File file)
3. getCanonicalFile(final File file)
4. getCanonicalFileEL(File file)
5. getCanonicalFileName(String filename)
6. getCanonicalFiles2List(List path, String[] allowedExtension)
7. getCanonicalFileURL(File file)
8. getCanonicalLocationFilePath(String location, String file)
9. getCanonicalOrAbsolutePath(File file)