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Add CheckedSupplier and CheckedRunnable to core (#22725)

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Introduce CheckedSupplier and CheckedRunnable functional interfaces
into core. These offer a checked version of the Supplier and Runnable
interfaces for use with lambda apis.
This commit is contained in:
Tim Brooks 2017-01-20 19:17:44 -06:00 committed by GitHub
parent 8f6c074691
commit d86f97c428
2 changed files with 60 additions and 0 deletions
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30
core/src/main/java/org/elasticsearch/common/CheckedRunnable.java Normal file
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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.common;
import java.lang.Runnable;
/**
* A {@link Runnable}-like interface which allows throwing checked exceptions.
*/
@FunctionalInterface
public interface CheckedRunnable<E extends Exception> {
void run() throws E;
}

30
core/src/main/java/org/elasticsearch/common/CheckedSupplier.java Normal file
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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.common;
import java.util.function.Supplier;
/**
* A {@link Supplier}-like interface which allows throwing checked exceptions.
*/
@FunctionalInterface
public interface CheckedSupplier<R, E extends Exception> {
R get() throws E;
}