net.fortuna.ical4j.util
Class Calendars

java.lang.Object
  net.fortuna.ical4j.util.Calendars

public final class Calendars
extends java.lang.Object

$Id: Calendars.java,v 1.17 2011/02/20 03:14:09 fortuna Exp $ Created on 10/11/2006 Utility method for working with Calendars.

Author:

Ben Fortuna

Method Summary

static java.lang.String	getContentType(Calendar calendar, java.nio.charset.Charset charset) Returns an appropriate MIME Content-Type for the specified calendar object.
static Uid	getUid(Calendar calendar) Returns a unique identifier as specified by components in the provided calendar.
static Calendar	load(java.lang.String filename) Loads a calendar from the specified file.
static Calendar	load(java.net.URL url) Loads a calendar from the specified URL.
static Calendar	merge(Calendar c1, Calendar c2) Merge all properties and components from two specified calendars into one instance.
static Calendar[]	split(Calendar calendar) Splits a calendar object into distinct calendar objects for unique identifers (UID).
static Calendar	wrap(Component component) Wraps a component in a calendar.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

load

public static Calendar load(java.lang.String filename)
                     throws java.io.IOException,
                            ParserException

Loads a calendar from the specified file.

Parameters:

filename - the name of the file from which to load calendar data

Returns:

returns a new calendar instance initialised from the specified file

Throws:

java.io.IOException - occurs when there is an error reading the specified file

ParserException - occurs when the data in the specified file is invalid

load

public static Calendar load(java.net.URL url)
                     throws java.io.IOException,
                            ParserException

Loads a calendar from the specified URL.

Parameters:

url - the URL from which to load calendar data

Returns:

returns a new calendar instance initialised from the specified URL

Throws:

java.io.IOException - occurs when there is an error reading from the specified URL

ParserException - occurs when the data in the specified URL is invalid

merge

public static Calendar merge(Calendar c1,
                             Calendar c2)

Merge all properties and components from two specified calendars into one instance. Note that the merge process is not very sophisticated, and may result in invalid calendar data (e.g. multiple properties of a type that should only be specified once).

Parameters:

c1 - the first calendar to merge

c2 - the second calendar to merge

Returns:

a Calendar instance containing all properties and components from both of the specified calendars

wrap

public static Calendar wrap(Component component)

Wraps a component in a calendar.

Parameters:

component - the component to wrap with a calendar

Returns:

a calendar containing the specified component

split

public static Calendar[] split(Calendar calendar)

Splits a calendar object into distinct calendar objects for unique identifers (UID).

Parameters:

calendar - a calendar instance

Returns:

an array of calendar objects

getUid

public static Uid getUid(Calendar calendar)
                  throws ConstraintViolationException

Returns a unique identifier as specified by components in the provided calendar.

Parameters:

calendar - a calendar instance

Returns:

the UID property

Throws:

ConstraintViolationException - if zero or more than one unique identifer is found in the specified calendar

getContentType

public static java.lang.String getContentType(Calendar calendar,
                                              java.nio.charset.Charset charset)

Returns an appropriate MIME Content-Type for the specified calendar object.

Parameters:

calendar - a calendar instance

charset - an optional encoding

Returns:

a content type string