1.1 --- a/src/net/fortuna/ical4j/util/Calendars.java Thu Feb 12 18:02:00 2015 +0100
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,231 +0,0 @@
1.4 -/**
1.5 - * Copyright (c) 2012, Ben Fortuna
1.6 - * All rights reserved.
1.7 - *
1.8 - * Redistribution and use in source and binary forms, with or without
1.9 - * modification, are permitted provided that the following conditions
1.10 - * are met:
1.11 - *
1.12 - * o Redistributions of source code must retain the above copyright
1.13 - * notice, this list of conditions and the following disclaimer.
1.14 - *
1.15 - * o Redistributions in binary form must reproduce the above copyright
1.16 - * notice, this list of conditions and the following disclaimer in the
1.17 - * documentation and/or other materials provided with the distribution.
1.18 - *
1.19 - * o Neither the name of Ben Fortuna nor the names of any other contributors
1.20 - * may be used to endorse or promote products derived from this software
1.21 - * without specific prior written permission.
1.22 - *
1.23 - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
1.24 - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
1.25 - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
1.26 - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
1.27 - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
1.28 - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
1.29 - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
1.30 - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
1.31 - * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
1.32 - * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
1.33 - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.34 - */
1.35 -package net.fortuna.ical4j.util;
1.36 -
1.37 -import java.io.FileInputStream;
1.38 -import java.io.IOException;
1.39 -import java.net.URL;
1.40 -import java.nio.charset.Charset;
1.41 -import java.util.HashMap;
1.42 -import java.util.Iterator;
1.43 -import java.util.Map;
1.44 -
1.45 -import net.fortuna.ical4j.data.CalendarBuilder;
1.46 -import net.fortuna.ical4j.data.ParserException;
1.47 -import net.fortuna.ical4j.model.Calendar;
1.48 -import net.fortuna.ical4j.model.Component;
1.49 -import net.fortuna.ical4j.model.ComponentList;
1.50 -import net.fortuna.ical4j.model.ConstraintViolationException;
1.51 -import net.fortuna.ical4j.model.IndexedComponentList;
1.52 -import net.fortuna.ical4j.model.Parameter;
1.53 -import net.fortuna.ical4j.model.Property;
1.54 -import net.fortuna.ical4j.model.component.VTimeZone;
1.55 -import net.fortuna.ical4j.model.parameter.TzId;
1.56 -import net.fortuna.ical4j.model.property.Method;
1.57 -import net.fortuna.ical4j.model.property.Uid;
1.58 -
1.59 -/**
1.60 - * $Id$
1.61 - *
1.62 - * Created on 10/11/2006
1.63 - *
1.64 - * Utility method for working with {@link Calendar}s.
1.65 - * @author Ben Fortuna
1.66 - */
1.67 -public final class Calendars {
1.68 -
1.69 - /**
1.70 - * Constructor made private to enforce static nature.
1.71 - */
1.72 - private Calendars() {
1.73 - }
1.74 -
1.75 - /**
1.76 - * Loads a calendar from the specified file.
1.77 - * @param filename the name of the file from which to load calendar data
1.78 - * @return returns a new calendar instance initialised from the specified file
1.79 - * @throws IOException occurs when there is an error reading the specified file
1.80 - * @throws ParserException occurs when the data in the specified file is invalid
1.81 - */
1.82 - public static Calendar load(final String filename) throws IOException, ParserException {
1.83 - final FileInputStream fin = new FileInputStream(filename);
1.84 - final CalendarBuilder builder = new CalendarBuilder();
1.85 - return builder.build(fin);
1.86 - }
1.87 -
1.88 - /**
1.89 - * Loads a calendar from the specified URL.
1.90 - * @param url the URL from which to load calendar data
1.91 - * @return returns a new calendar instance initialised from the specified URL
1.92 - * @throws IOException occurs when there is an error reading from the specified URL
1.93 - * @throws ParserException occurs when the data in the specified URL is invalid
1.94 - */
1.95 - public static Calendar load(final URL url) throws IOException, ParserException {
1.96 - final CalendarBuilder builder = new CalendarBuilder();
1.97 - return builder.build(url.openStream());
1.98 - }
1.99 -
1.100 - /**
1.101 - * Merge all properties and components from two specified calendars into one instance.
1.102 - * Note that the merge process is not very sophisticated, and may result in invalid calendar
1.103 - * data (e.g. multiple properties of a type that should only be specified once).
1.104 - * @param c1 the first calendar to merge
1.105 - * @param c2 the second calendar to merge
1.106 - * @return a Calendar instance containing all properties and components from both of the specified calendars
1.107 - */
1.108 - public static Calendar merge(final Calendar c1, final Calendar c2) {
1.109 - final Calendar result = new Calendar();
1.110 - result.getProperties().addAll(c1.getProperties());
1.111 - for (final Iterator i = c2.getProperties().iterator(); i.hasNext();) {
1.112 - final Property p = (Property) i.next();
1.113 - if (!result.getProperties().contains(p)) {
1.114 - result.getProperties().add(p);
1.115 - }
1.116 - }
1.117 - result.getComponents().addAll(c1.getComponents());
1.118 - for (final Iterator i = c2.getComponents().iterator(); i.hasNext();) {
1.119 - final Component c = (Component) i.next();
1.120 - if (!result.getComponents().contains(c)) {
1.121 - result.getComponents().add(c);
1.122 - }
1.123 - }
1.124 - return result;
1.125 - }
1.126 -
1.127 - /**
1.128 - * Wraps a component in a calendar.
1.129 - * @param component the component to wrap with a calendar
1.130 - * @return a calendar containing the specified component
1.131 - */
1.132 - public static Calendar wrap(final Component component) {
1.133 - final ComponentList components = new ComponentList();
1.134 - components.add(component);
1.135 - return new Calendar(components);
1.136 - }
1.137 -
1.138 - /**
1.139 - * Splits a calendar object into distinct calendar objects for unique
1.140 - * identifers (UID).
1.141 - * @param calendar a calendar instance
1.142 - * @return an array of calendar objects
1.143 - */
1.144 - public static Calendar[] split(final Calendar calendar) {
1.145 - // if calendar contains one component or less, or is composed entirely of timezone
1.146 - // definitions, return the original calendar unmodified..
1.147 - if (calendar.getComponents().size() <= 1
1.148 - || calendar.getComponents(Component.VTIMEZONE).size() == calendar.getComponents().size()) {
1.149 - return new Calendar[] {calendar};
1.150 - }
1.151 -
1.152 - final IndexedComponentList timezones = new IndexedComponentList(calendar.getComponents(Component.VTIMEZONE),
1.153 - Property.TZID);
1.154 -
1.155 - final Map calendars = new HashMap();
1.156 - for (final Iterator i = calendar.getComponents().iterator(); i.hasNext();) {
1.157 - final Component c = (Component) i.next();
1.158 - if (c instanceof VTimeZone) {
1.159 - continue;
1.160 - }
1.161 -
1.162 - final Uid uid = (Uid) c.getProperty(Property.UID);
1.163 -
1.164 - Calendar uidCal = (Calendar) calendars.get(uid);
1.165 - if (uidCal == null) {
1.166 - uidCal = new Calendar(calendar.getProperties(), new ComponentList());
1.167 - // remove METHOD property for split calendars..
1.168 - for (final Iterator mp = uidCal.getProperties(Property.METHOD).iterator(); mp.hasNext();) {
1.169 - uidCal.getProperties().remove(mp.next());
1.170 - }
1.171 - calendars.put(uid, uidCal);
1.172 - }
1.173 -
1.174 - for (final Iterator j = c.getProperties().iterator(); j.hasNext();) {
1.175 - final Property p = (Property) j.next();
1.176 - final TzId tzid = (TzId) p.getParameter(Parameter.TZID);
1.177 - if (tzid != null) {
1.178 - final VTimeZone timezone = (VTimeZone) timezones.getComponent(tzid.getValue());
1.179 - if (!uidCal.getComponents().contains(timezone)) {
1.180 - uidCal.getComponents().add(timezone);
1.181 - }
1.182 - }
1.183 - }
1.184 - uidCal.getComponents().add(c);
1.185 - }
1.186 - return (Calendar[]) calendars.values().toArray(new Calendar[calendars.values().size()]);
1.187 - }
1.188 -
1.189 - /**
1.190 - * Returns a unique identifier as specified by components in the provided calendar.
1.191 - * @param calendar a calendar instance
1.192 - * @return the UID property
1.193 - * @throws ConstraintViolationException if zero or more than one unique identifer is found in the specified calendar
1.194 - */
1.195 - public static Uid getUid(final Calendar calendar) throws ConstraintViolationException {
1.196 - Uid uid = null;
1.197 - for (final Iterator i = calendar.getComponents().iterator(); i.hasNext();) {
1.198 - final Component c = (Component) i.next();
1.199 - for (final Iterator j = c.getProperties(Property.UID).iterator(); j.hasNext();) {
1.200 - final Uid foundUid = (Uid) j.next();
1.201 - if (uid != null && !uid.equals(foundUid)) {
1.202 - throw new ConstraintViolationException("More than one UID found in calendar");
1.203 - }
1.204 - uid = foundUid;
1.205 - }
1.206 - }
1.207 - if (uid == null) {
1.208 - throw new ConstraintViolationException("Calendar must specify a single unique identifier (UID)");
1.209 - }
1.210 - return uid;
1.211 - }
1.212 -
1.213 - /**
1.214 - * Returns an appropriate MIME Content-Type for the specified calendar object.
1.215 - * @param calendar a calendar instance
1.216 - * @param charset an optional encoding
1.217 - * @return a content type string
1.218 - */
1.219 - public static String getContentType(Calendar calendar, Charset charset) {
1.220 - final StringBuffer b = new StringBuffer("text/calendar");
1.221 -
1.222 - final Method method = (Method) calendar.getProperty(Property.METHOD);
1.223 - if (method != null) {
1.224 - b.append("; method=");
1.225 - b.append(method.getValue());
1.226 - }
1.227 -
1.228 - if (charset != null) {
1.229 - b.append("; charset=");
1.230 - b.append(charset);
1.231 - }
1.232 - return b.toString();
1.233 - }
1.234 -}
