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