Quelle ContainerEvent.java Sprache: JAVA

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License.  You may obtain a copy of the License at
*
*      http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.catalina;

import java.util.EventObject;

/**
* General event for notifying listeners of significant changes on a Container.
*
* @author Craig R. McClanahan
*/
public final class ContainerEvent extends EventObject {

    private static final long serialVersionUID = 1L;

    /**
     * The event data associated with this event.
     */
    private final Object data;

    /**
     * The event type this instance represents.
     */
    private final String type;

    /**
     * Construct a new ContainerEvent with the specified parameters.
     *
     * @param container Container on which this event occurred
     * @param type Event type
     * @param data Event data
     */
    public ContainerEvent(Container container, String type, Object data) {
        super(container);
        this.type = type;
        this.data = data;
    }

    /**
     * Return the event data of this event.
     *
     * @return The data, if any, associated with this event.
     */
    public Object getData() {
        return this.data;
    }

    /**
     * Return the Container on which this event occurred.
     *
     * @return The Container on which this event occurred.
     */
    public Container getContainer() {
        return (Container) getSource();
    }

    /**
     * Return the event type of this event.
     *
     * @return The event type of this event. Although this is a String, it is
     *         safe to rely on the value returned by this method remaining
     *         consistent between point releases.
     */
    public String getType() {
        return this.type;
    }

    /**
     * Return a string representation of this event.
     */
    @Override
    public String toString() {
        return "ContainerEvent['" + getContainer() + "','" +
                getType() + "','" + getData() + "']";
    }
}

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