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A Java library for reading and writing iCalendar (*.ics) files
There is a newer version: 4.0.8
/**
 * Copyright (c) 2012, Ben Fortuna
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  o Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *
 *  o Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 *
 *  o Neither the name of Ben Fortuna nor the names of any other contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package net.fortuna.ical4j.data;

import java.io.IOException;
import java.net.URISyntaxException;

/**
 *  * $Id$ [Nov 5,
 * 2004]
 * 
 *
 * Implementors provide functionality applicable during the parsing of an iCalendar data stream (e.g. building an object
 * model).
 * @author Ben Fortuna
 */
public interface ContentHandler {

    /**
     * Triggers the start of handling a calendar.
     */
    void startCalendar();

    /**
     * Triggers the end of handling a calendar.
     */
    void endCalendar() throws IOException;

    /**
     * Triggers the start of handling a component.
     * @param name a component name
     */
    void startComponent(String name);

    /**
     * Triggers the end of handling a component.
     * @param name a component name
     */
    void endComponent(String name);

    /**
     * Triggers the start of handling a property.
     * @param name a property name
     */
    void startProperty(String name);

    /**
     * Triggers the handling of a property value.
     * @param value a property value
     * @throws URISyntaxException where the property value is not a valid URI for applicable properties
     * @throws IOException where data cannot be read for applicable properties
     */
    void propertyValue(String value) throws URISyntaxException,
            IOException;

    /**
     * Triggers the end of handling a property.
     * @param name a property name
     */
    void endProperty(String name) throws URISyntaxException, IOException;

    /**
     * Triggers the handling of a parameter.
     * @param name a parameter name
     * @param value a parameter value
     * @throws URISyntaxException where the parameter value is not a valid URI for applicable parameters
     */
    void parameter(String name, String value) throws URISyntaxException;
}