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Java example source code file (CheckedProvider.java)

This example Java source code file (CheckedProvider.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

checkedprovider, exception

The CheckedProvider.java Java example source code

/**
 * Copyright (C) 2007 Google Inc.
 *
 * 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 com.google.inject.throwingproviders;

/**
 * Alternative to the Guice {@link com.google.inject.Provider} that throws
 * a checked Exception. Users may not inject {@code T} directly.
 *
 * <p>This interface must be extended to use application-specific exception types.
 * Such subinterfaces may not define new methods, but may narrow the exception type.
 * <pre>
 * public interface RemoteProvider<T> extends CheckedProvider<T> { 
 *   T get() throws CustomExceptionOne, CustomExceptionTwo;
 * }
 * </pre>
 *
 * <p>When this type is bound using {@link ThrowingProviderBinder}, the value returned
 * or exception thrown by {@link #get} will be scoped. As a consequence, {@link #get}
 * will invoked at most once within each scope.
 * 
 * @since 3.0
 */
public interface CheckedProvider<T> {
  T get() throws Exception;
}

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