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/*
 * Copyright 2011 the original author or authors.
 *
 * Licensed 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.gradle.launcher.daemon.protocol;

/**
 * The supertype of all objects sent from the daemon server back to the client.
 * 
 * Specific subclass types carry extra context, e.g. whether it was a failure or successful result.
 * 

 * The meaning of the value parameter is specific to each concrete subclass. The validity of {@code null}
 * is also to be defined by each subclass. This implementation does allow null values.
 *
 * The result is the last message sent from the daemon back to the daemon client.
 */
public abstract class Result extends Message {

    private final T value;

    public Result(T value) {
        this.value = value;
    }

    public T getValue() {
        return value;
    }

    @Override
    public String toString() {
        return getClass().getSimpleName() + "[value=" + getValue() + "]";
    }
}