Caldavsync Sources: src/net/fortuna/ical4j/util/CompatibilityHints.java@73bdfa70b04e

     1 /**

     2  * Copyright (c) 2012, Ben Fortuna

     3  * All rights reserved.

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions

     7  * are met:

     8  *

     9  *  o Redistributions of source code must retain the above copyright

    10  * notice, this list of conditions and the following disclaimer.

    11  *

    12  *  o Redistributions in binary form must reproduce the above copyright

    13  * notice, this list of conditions and the following disclaimer in the

    14  * documentation and/or other materials provided with the distribution.

    15  *

    16  *  o Neither the name of Ben Fortuna nor the names of any other contributors

    17  * may be used to endorse or promote products derived from this software

    18  * without specific prior written permission.

    19  *

    20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

    21  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

    22  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

    23  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR

    24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

    25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

    26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF

    28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING

    29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

    30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    31  */

    32 package net.fortuna.ical4j.util;

    34 import java.util.Map;

    36 import edu.emory.mathcs.backport.java.util.concurrent.ConcurrentHashMap;

    38 /**

    39  * $Id$

    40  *

    41  * Created on 9/03/2006

    42  *

    43  * A set of keys used to enable compatibility features.

    44  *

    45  * @author Ben Fortuna

    46  */

    47 public final class CompatibilityHints {

    49     /**

    50      * A system property key to enable relaxed unfolding. Relaxed unfolding is enabled by setting this system property

    51      * to "true".

    52      */

    53     public static final String KEY_RELAXED_UNFOLDING = "ical4j.unfolding.relaxed";

    55     /**

    56      * A system property key to enable relaxed parsing. Relaxed parsing is enabled by setting this system property to

    57      * "true".

    58      */

    59     public static final String KEY_RELAXED_PARSING = "ical4j.parsing.relaxed";

    61     /**

    62      * A system property key to enable relaxed validation. Relaxed validation disables validation of certain conformance

    63      * rules that many iCalendar implementations do not conform to. Relaxed validation is enabled by setting this system

    64      * property to "true".

    65      */

    66     public static final String KEY_RELAXED_VALIDATION = "ical4j.validation.relaxed";

    68     /**

    69      * A system property key used to enable compatibility with Outlook/Exchange-generated iCalendar files. Outlook

    70      * compatibility is enabled by setting this system property to "true".

    71      */

    72     public static final String KEY_OUTLOOK_COMPATIBILITY = "ical4j.compatibility.outlook";

    74     /**

    75      * A system property key used to enable compatibility with Lotus Notes-generated iCalendar files. Notes

    76      * compatibility is enabled by setting this system property to "true".

    77      */

    78     public static final String KEY_NOTES_COMPATIBILITY = "ical4j.compatibility.notes";

    80     /**

    81      * Support for vCard features that are not necessarily compatible with the iCalendar standard.

    82      */

    83     public static final String KEY_VCARD_COMPATIBILITY = "ical4j.compatibility.vcard";

    85     private static final Map HINTS = new ConcurrentHashMap();

    86     // preload known hints from the configurator

    87     static {

    88         setHintEnabled(KEY_RELAXED_UNFOLDING, "true".equals(Configurator.getProperty(KEY_RELAXED_UNFOLDING)));

    89         setHintEnabled(KEY_RELAXED_PARSING, "true".equals(Configurator.getProperty(KEY_RELAXED_PARSING)));

    90         setHintEnabled(KEY_RELAXED_VALIDATION, "true".equals(Configurator.getProperty(KEY_RELAXED_VALIDATION)));

    91         setHintEnabled(KEY_OUTLOOK_COMPATIBILITY, "true".equals(Configurator.getProperty(KEY_OUTLOOK_COMPATIBILITY)));

    92         setHintEnabled(KEY_NOTES_COMPATIBILITY, "true".equals(Configurator.getProperty(KEY_NOTES_COMPATIBILITY)));

    93     }

    95     /**

    96      * Constructor made private to enforce static nature.

    97      */

    98     private CompatibilityHints() {

    99     }

   101     /**

   102      * @param key

   103      *            a compatibility hint key

   104      * @param enabled

   105      *            indicates whether to enable or disable the compatibility hint

   106      */

   107     public static void setHintEnabled(final String key, final boolean enabled) {

   108         HINTS.put(key, Boolean.valueOf(enabled));

   109     }

   111     /**

   112      * @param key

   113      *            a compatibility hint key

   114      */

   115     public static void clearHintEnabled(final String key) {

   116         HINTS.remove(key);

   117     }

   119     /**

   120      * @param key

   121      *            a compatibility hint key

   122      * @return true if the specified compatibility hint is enabled, otherwise false

   123      */

   124     public static boolean isHintEnabled(final String key) {

   125         if (HINTS.get(key) != null) {

   126             return ((Boolean) HINTS.get(key)).booleanValue();

   127         }

   128         return "true".equals(Configurator.getProperty(key));

   129     }

   130 }

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