/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2002 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Ant", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
 * ITS 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */
package org.apache.ant.common.event;

import java.util.EventObject;

/**
 * A BuildEvent indicates the occurence of a significant event in the build.
 * All build events come from an Frame or an ExecutionManager.
 * There are a number of different types of event and they will generally be
 * associated with some build element from the build model.
 *
 * @author Conor MacNeill
 * @created 15 January 2002
 */
public class BuildEvent extends EventObject {

    /** Build Started Event type */
    public static final int BUILD_STARTED = 1;
    /** Build Finished Event Type */
    public static final int BUILD_FINISHED = 2;
    /** Start of target event type */
    public static final int TARGET_STARTED = 3;
    /** Target finished event type */
    public static final int TARGET_FINISHED = 4;
    /** Start of task event type */
    public static final int TASK_STARTED = 5;
    /** end of task event type */
    public static final int TASK_FINISHED = 6;
    /** message event type */
    public static final int MESSAGE = 7;

    /** The type of this event */
    private int eventType;
    /** The cause of this event if appropriate */
    private Throwable cause = null;
    /** message associated wuth this event */
    private String message = null;
    /** The priority of this message */
    private int messagePriority;

    /**
     * Create a build event.
     *
     * @param eventType the type of the buildEvent.
     * @param source the element with which this event is associated
     */
    public BuildEvent(Object source, int eventType) {
        super(source);
        this.eventType = eventType;
    }

    /**
     * Create a build event with an associated exception.
     *
     * @param eventType the type of the buildEvent.
     * @param cause An exception if associated with the event
     * @param source the object with which this event is associated
     */
    public BuildEvent(Object source, int eventType,
                      Throwable cause) {
        this(source, eventType);
        this.cause = cause;
    }

    /**
     * Create a build event for a message
     *
     * @param source the object with which the event is associated.
     * @param message the message associated with this event
     * @param priority the message priority
     */
    public BuildEvent(Object source, String message,
                      int priority) {
        super(source);
        this.eventType = MESSAGE;
        this.message = message;
        this.messagePriority = priority;
    }

    /**
     * Get the type of this event
     *
     * @return the event type
     */
    public int getEventType() {
        return eventType;
    }

    /**
     * Returns the logging message. This field will only be set for
     * "messageLogged" events.
     *
     * @return the message value
     */
    public String getMessage() {
        return message;
    }

    /**
     * Returns the priority of the logging message. This field will only be
     * set for "messageLogged" events.
     *
     * @return the priority value
     */
    public int getPriority() {
        return messagePriority;
    }

    /**
     * Returns the exception that was thrown, if any. This field will only
     * be set for "taskFinished", "targetFinished", and "buildFinished"
     * events.
     *
     * @return the cause value
     */
    public Throwable getCause() {
        return cause;
    }

}