001    package ezvcard.property;
002    
003    import java.util.ArrayList;
004    import java.util.List;
005    
006    import ezvcard.VCard;
007    import ezvcard.VCardVersion;
008    import ezvcard.Warning;
009    
010    /*
011     Copyright (c) 2013, Michael Angstadt
012     All rights reserved.
013    
014     Redistribution and use in source and binary forms, with or without
015     modification, are permitted provided that the following conditions are met: 
016    
017     1. Redistributions of source code must retain the above copyright notice, this
018     list of conditions and the following disclaimer. 
019     2. Redistributions in binary form must reproduce the above copyright notice,
020     this list of conditions and the following disclaimer in the documentation
021     and/or other materials provided with the distribution. 
022    
023     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
024     ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
025     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
026     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
027     ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
028     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
029     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
030     ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
031     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
032     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
033    
034     The views and conclusions contained in the software and documentation are those
035     of the authors and should not be interpreted as representing official policies, 
036     either expressed or implied, of the FreeBSD Project.
037     */
038    
039    /**
040     * Represents a property whose value is a list of textual values.
041     * @author Michael Angstadt
042     * @param <T> the type of values sorted in the list
043     */
044    public class ListProperty<T> extends VCardProperty {
045            protected List<T> values = new ArrayList<T>();
046    
047            /**
048             * Gest the list of values.
049             * @return the list of values
050             */
051            public List<T> getValues() {
052                    return values;
053            }
054    
055            /**
056             * Adds a value to the list.
057             * @param value the value to add
058             */
059            public void addValue(T value) {
060                    values.add(value);
061            }
062    
063            /**
064             * Removes a value from the list.
065             * @param value the value to remove
066             */
067            public void removeValue(T value) {
068                    values.remove(value);
069            }
070    
071            @Override
072            protected void _validate(List<Warning> warnings, VCardVersion version, VCard vcard) {
073                    if (values.isEmpty()) {
074                            warnings.add(new Warning(8));
075                    }
076            }
077    }