RunnableWrapperClosure.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.ignite.internal.util.lang.gridfunc;

import org.apache.ignite.internal.util.lang.GridAbsClosure;
import org.apache.ignite.internal.util.typedef.internal.S;

/**
 * Closure that wraps given runnable.
 * Note that wrapping closure always returns {@code null}.
 */
public class RunnableWrapperClosure extends GridAbsClosure {
    /** */
    private static final long serialVersionUID = 0L;

    /** */
    private final Runnable r;

    /**
     * @param r Runnable to convert to closure. If {@code null} - no-op closure is returned.
     */
    public RunnableWrapperClosure(Runnable r) {
        this.r = r;
    }

    /** {@inheritDoc} */
    @Override public void apply() {
        if (r != null)
            r.run();
    }

    /** {@inheritDoc} */
    @Override public String toString() {
        return S.toString(RunnableWrapperClosure.class, this);
    }
}