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SDK for Microsoft Azure Storage Clients
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/**
 * Copyright Microsoft Corporation
 * 
 * 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.
 */
/**
 * 
 */
package com.microsoft.azure.storage.file;

import com.microsoft.azure.storage.Constants;

import java.util.EnumSet;

/**
 * Specifies options for NTFS Attributes.
 */
public enum NtfsAttributes {

    /**
     * The file is read-only.
     */
    READ_ONLY,

    /**
     * The file is hidden, and thus is not included in ordinary directory listing.
     */
    HIDDEN,

    /**
     * The file is a system file. That is, the file is part of the operating system
     * or is used exclusively by the operating system.
     */
    SYSTEM,

    /**
     * The file is a standard file that has no special attributes.
     */
    NORMAL,

    /**
     * The file is a directory.
     */
    DIRECTORY,

    /**
     * The file is a candidate for backup or removal.
     */
    ARCHIVE,

    /**
     * The file is temporary. A temporary file contains data that is needed while an
     * application is executing but is not needed after the application is finished.
     * File systems try to keep all the data in memory for quicker access rather than
     * flushing the data back to mass storage. A temporary file should be deleted by
     * the application as soon as it is no longer needed.
     */
    TEMPORARY,

    /**
     * The file is offline. The data of the file is not immediately available.
     */
    OFFLINE,

    /**
     * The file will not be indexed by the operating system's content indexing service.
     */
    NOT_CONTENT_INDEXED,

    /**
     * The file or directory is excluded from the data integrity scan. When this value
     * is applied to a directory, by default, all new files and subdirectories within
     * that directory are excluded from data integrity.
     */
    NO_SCRUB_DATA;

    /**
     * Converts an enum set of {@code NtfsAttributes} to a string.
     *
     * @return A String that represents the NTFS Attributes in the correct format delimited by |
     *         which is described at {@link #toAttributes(String)}.
     */
    public static String toString(EnumSet ntfsAttributes) {
        if (ntfsAttributes == null) {
            return Constants.EMPTY_STRING;
        }

        final StringBuilder builder = new StringBuilder();

        if (ntfsAttributes.contains(NtfsAttributes.READ_ONLY)) {
            builder.append("ReadOnly|");
        }

        if (ntfsAttributes.contains(NtfsAttributes.HIDDEN)) {
            builder.append("Hidden|");
        }

        if (ntfsAttributes.contains(NtfsAttributes.SYSTEM)) {
            builder.append("System|");
        }

        if (ntfsAttributes.contains(NtfsAttributes.NORMAL)) {
            builder.append("None|");
        }

        if (ntfsAttributes.contains(NtfsAttributes.DIRECTORY)) {
            builder.append("Directory|");
        }

        if (ntfsAttributes.contains(NtfsAttributes.ARCHIVE)) {
            builder.append("Archive|");
        }

        if (ntfsAttributes.contains(NtfsAttributes.TEMPORARY)) {
            builder.append("Temporary|");
        }

        if (ntfsAttributes.contains(NtfsAttributes.OFFLINE)) {
            builder.append("Offline|");
        }

        if (ntfsAttributes.contains(NtfsAttributes.NOT_CONTENT_INDEXED)) {
            builder.append("NotContentIndexed|");
        }

        if (ntfsAttributes.contains(NtfsAttributes.NO_SCRUB_DATA)) {
            builder.append("NoScrubData|");
        }

        builder.deleteCharAt(builder.lastIndexOf("|"));

        return builder.toString();
    }

    /**
     * Creates an enum set of {@code NtfsAttributes} from a valid String .
     *
     * @param ntfsAttributes
     *            A String that represents the ntfs attributes. The string must contain one or
     *            more of the following values delimited by a |. Note they are case sensitive.
     *            
     *            ReadOnly
     *            Hidden
     *            System
     *            None
     *            Directory
     *            Archive
     *            Temporary
     *            Offline
     *            NotContentIndexed
     *            NoScrubData
     *            
     */
    public static EnumSet toAttributes(String ntfsAttributes) {
        EnumSet attributes = EnumSet.noneOf(NtfsAttributes.class);
        String[] splitAttributes = ntfsAttributes.split("\\|");

        for(String sa: splitAttributes) {
            if (sa.equals("ReadOnly")) {
                attributes.add(NtfsAttributes.READ_ONLY);
            } else if (sa.equals("Hidden")) {
                attributes.add(NtfsAttributes.HIDDEN);
            } else if (sa.equals("System")) {
                attributes.add(NtfsAttributes.SYSTEM);
            } else if (sa.equals("None")) {
                attributes.add(NtfsAttributes.NORMAL);
            } else if (sa.equals("Directory")) {
                attributes.add(NtfsAttributes.DIRECTORY);
            } else if (sa.equals("Archive")) {
                attributes.add(NtfsAttributes.ARCHIVE);
            } else if (sa.equals("Temporary")) {
                attributes.add(NtfsAttributes.TEMPORARY);
            } else if (sa.equals("Offline")) {
                attributes.add(NtfsAttributes.OFFLINE);
            } else if (sa.equals("NotContentIndexed")) {
                attributes.add(NtfsAttributes.NOT_CONTENT_INDEXED);
            } else if (sa.equals("NoScrubData")) {
                attributes.add(NtfsAttributes.NO_SCRUB_DATA);
            } else {
                throw new IllegalArgumentException("value");
            }
        }

        return attributes;
    }

}