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src/net/fortuna/ical4j/model/IndexedComponentList.java@fb9019fb1bf7 (annotated)

src/net/fortuna/ical4j/model/IndexedComponentList.java

Tue, 10 Feb 2015 18:12:00 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Tue, 10 Feb 2015 18:12:00 +0100

changeset 0

fb9019fb1bf7

permissions

-rw-r--r--

Import initial revisions of existing project AndroidCaldavSyncAdapater,
forked from upstream repository at 27e8a0f8495c92e0780d450bdf0c7cec77a03a55.

michael@0	1	/**
michael@0	2	* Copyright (c) 2012, Ben Fortuna
michael@0	3	* All rights reserved.
michael@0	4	*
michael@0	5	* Redistribution and use in source and binary forms, with or without
michael@0	6	* modification, are permitted provided that the following conditions
michael@0	7	* are met:
michael@0	8	*
michael@0	9	* o Redistributions of source code must retain the above copyright
michael@0	10	* notice, this list of conditions and the following disclaimer.
michael@0	11	*
michael@0	12	* o Redistributions in binary form must reproduce the above copyright
michael@0	13	* notice, this list of conditions and the following disclaimer in the
michael@0	14	* documentation and/or other materials provided with the distribution.
michael@0	15	*
michael@0	16	* o Neither the name of Ben Fortuna nor the names of any other contributors
michael@0	17	* may be used to endorse or promote products derived from this software
michael@0	18	* without specific prior written permission.
michael@0	19	*
michael@0	20	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
michael@0	21	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
michael@0	22	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
michael@0	23	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
michael@0	24	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
michael@0	25	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
michael@0	26	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
michael@0	27	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
michael@0	28	* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
michael@0	29	* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
michael@0	30	* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0	31	*/
michael@0	32	package net.fortuna.ical4j.model;
michael@0	33
michael@0	34	import java.util.Collections;
michael@0	35	import java.util.HashMap;
michael@0	36	import java.util.Iterator;
michael@0	37	import java.util.Map;
michael@0	38
michael@0	39	/**
michael@0	40	* $Id$
michael@0	41	*
michael@0	42	* Created on 4/02/2006
michael@0	43	*
michael@0	44	* Provides indexing of components on a specific property.
michael@0	45	* @author Ben Fortuna
michael@0	46	*/
michael@0	47	public class IndexedComponentList {
michael@0	48
michael@0	49	private static final ComponentList EMPTY_LIST = new ComponentList();
michael@0	50
michael@0	51	private Map index;
michael@0	52
michael@0	53	/**
michael@0	54	* Creates a new instance indexed on properties with the specified name.
michael@0	55	* @param list a list of components
michael@0	56	* @param propertyName the name of the properties to index on
michael@0	57	*/
michael@0	58	public IndexedComponentList(final ComponentList list, final String propertyName) {
michael@0	59	final Map indexedComponents = new HashMap();
michael@0	60	for (final Iterator i = list.iterator(); i.hasNext();) {
michael@0	61	final Component component = (Component) i.next();
michael@0	62	for (final Iterator j = component.getProperties(propertyName).iterator(); j.hasNext();) {
michael@0	63	final Property property = (Property) j.next();
michael@0	64	ComponentList components = (ComponentList) indexedComponents.get(property.getValue());
michael@0	65	if (components == null) {
michael@0	66	components = new ComponentList();
michael@0	67	indexedComponents.put(property.getValue(), components);
michael@0	68	}
michael@0	69	components.add(component);
michael@0	70	}
michael@0	71	}
michael@0	72	this.index = Collections.unmodifiableMap(indexedComponents);
michael@0	73	}
michael@0	74
michael@0	75	/**
michael@0	76	* Returns a list of components containing a property with the
michael@0	77	* specified value.
michael@0	78	* @param propertyValue the value of the property contained in the
michael@0	79	* returned components
michael@0	80	* @return a component list
michael@0	81	*/
michael@0	82	public ComponentList getComponents(final String propertyValue) {
michael@0	83	ComponentList components = (ComponentList) index.get(propertyValue);
michael@0	84	if (components == null) {
michael@0	85	components = EMPTY_LIST;
michael@0	86	}
michael@0	87	return components;
michael@0	88	}
michael@0	89
michael@0	90	/**
michael@0	91	* Returns the first component containing a property with the specified
michael@0	92	* value.
michael@0	93	* @param propertyValue the value of the property identified in the returned
michael@0	94	* component
michael@0	95	* @return a component or null if no component is found containing a property
michael@0	96	* with the specified value
michael@0	97	*/
michael@0	98	public Component getComponent(final String propertyValue) {
michael@0	99	final ComponentList components = getComponents(propertyValue);
michael@0	100	if (!components.isEmpty()) {
michael@0	101	return (Component) components.iterator().next();
michael@0	102	}
michael@0	103	return null;
michael@0	104	}
michael@0	105	}