001 package biweekly.property.marshaller;
002
003 import java.util.List;
004
005 import biweekly.ICalDataType;
006 import biweekly.Warning;
007 import biweekly.io.json.JCalValue;
008 import biweekly.io.xml.XCalElement;
009 import biweekly.parameter.ICalParameters;
010 import biweekly.property.ListProperty;
011
012 /*
013 Copyright (c) 2013, Michael Angstadt
014 All rights reserved.
015
016 Redistribution and use in source and binary forms, with or without
017 modification, are permitted provided that the following conditions are met:
018
019 1. Redistributions of source code must retain the above copyright notice, this
020 list of conditions and the following disclaimer.
021 2. Redistributions in binary form must reproduce the above copyright notice,
022 this list of conditions and the following disclaimer in the documentation
023 and/or other materials provided with the distribution.
024
025 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
026 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
027 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
028 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
029 ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
030 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
031 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
032 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
033 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
034 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
035 */
036
037 /**
038 * Marshals properties that contain a list of values.
039 * @param <T> the property class
040 * @param <V> the value class
041 * @author Michael Angstadt
042 */
043 public abstract class ListPropertyMarshaller<T extends ListProperty<V>, V> extends ICalPropertyMarshaller<T> {
044 public ListPropertyMarshaller(Class<T> clazz, String propertyName) {
045 this(clazz, propertyName, ICalDataType.TEXT);
046 }
047
048 public ListPropertyMarshaller(Class<T> clazz, String propertyName, ICalDataType dataType) {
049 super(clazz, propertyName, dataType);
050 }
051
052 @Override
053 protected String _writeText(final T property) {
054 return list(property.getValues(), new ListCallback<V>() {
055 public String asString(V value) {
056 return writeValue(property, value);
057 }
058 });
059 }
060
061 @Override
062 protected T _parseText(String value, ICalDataType dataType, ICalParameters parameters, List<Warning> warnings) {
063 return parse(list(value), dataType, parameters, warnings);
064 }
065
066 @Override
067 protected void _writeXml(T property, XCalElement element) {
068 for (V value : property.getValues()) {
069 String valueStr = writeValue(property, value);
070 element.append(dataType(property), valueStr);
071 }
072 }
073
074 @Override
075 protected T _parseXml(XCalElement element, ICalParameters parameters, List<Warning> warnings) {
076 List<String> values = element.all(defaultDataType);
077 if (!values.isEmpty()) {
078 return parse(values, defaultDataType, parameters, warnings);
079 }
080
081 throw missingXmlElements(defaultDataType);
082 }
083
084 @Override
085 protected JCalValue _writeJson(T property) {
086 List<V> values = property.getValues();
087 if (!values.isEmpty()) {
088 return JCalValue.multi(property.getValues());
089 }
090
091 return JCalValue.single("");
092 }
093
094 @Override
095 protected T _parseJson(JCalValue value, ICalDataType dataType, ICalParameters parameters, List<Warning> warnings) {
096 return parse(value.asMulti(), dataType, parameters, warnings);
097 }
098
099 private T parse(List<String> valueStrs, ICalDataType dataType, ICalParameters parameters, List<Warning> warnings) {
100 T property = newInstance(dataType, parameters);
101
102 for (String valueStr : valueStrs) {
103 V value = readValue(valueStr, dataType, parameters, warnings);
104 property.addValue(value);
105 }
106
107 return property;
108 }
109
110 protected abstract T newInstance(ICalDataType dataType, ICalParameters parameters);
111
112 protected abstract String writeValue(T property, V value);
113
114 protected abstract V readValue(String value, ICalDataType dataType, ICalParameters parameters, List<Warning> warnings);
115 }