001    package biweekly.property;
002    
003    import java.util.ArrayList;
004    import java.util.List;
005    
006    import biweekly.component.ICalComponent;
007    
008    
009    /*
010     Copyright (c) 2013, Michael Angstadt
011     All rights reserved.
012    
013     Redistribution and use in source and binary forms, with or without
014     modification, are permitted provided that the following conditions are met: 
015    
016     1. Redistributions of source code must retain the above copyright notice, this
017     list of conditions and the following disclaimer. 
018     2. Redistributions in binary form must reproduce the above copyright notice,
019     this list of conditions and the following disclaimer in the documentation
020     and/or other materials provided with the distribution. 
021    
022     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
023     ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
024     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
025     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
026     ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
027     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
028     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
029     ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
030     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
031     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
032     */
033    
034    /**
035     * Represents a property whose value is a list of values.
036     * @author Michael Angstadt
037     * @param <T> the value type
038     */
039    public class ListProperty<T> extends ICalProperty {
040            private final List<T> values;
041    
042            /**
043             * Creates a new list property.
044             */
045            public ListProperty() {
046                    values = new ArrayList<T>();
047            }
048    
049            /**
050             * Creates a new list property.
051             * @param values the values to initialize the property with
052             */
053            public ListProperty(T... values) {
054                    this();
055                    for (T value : values) {
056                            this.values.add(value);
057                    }
058            }
059    
060            /**
061             * Creates a new list property.
062             * @param values the values to initialize the property with
063             */
064            public ListProperty(List<T> values) {
065                    this.values = values;
066            }
067    
068            /**
069             * Adds a value to this property.
070             * @param value the value to add
071             */
072            public void addValue(T value) {
073                    values.add(value);
074            }
075    
076            /**
077             * Gets the values of this property.
078             * @return the values
079             */
080            public List<T> getValues() {
081                    return values;
082            }
083    
084            @Override
085            protected void validate(List<ICalComponent> components, List<String> warnings) {
086                    if (values.isEmpty()) {
087                            warnings.add("No values are defined.");
088                    }
089            }
090    }