com.github.veithen.maven.jacoco.Lazy Maven / Gradle / Ivy

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/*-
 * #%L
 * jacoco-report-maven-plugin
 * %%
 * Copyright (C) 2018 Andreas Veithen
 * %%
 * 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.
 * #L%
 */
package com.github.veithen.maven.jacoco;

import java.util.function.Supplier;

final class Lazy implements Supplier {
    private Supplier supplier;
    private T value;

    Lazy(Supplier supplier) {
        this.supplier = supplier;
    }

    public synchronized T get() {
        if (supplier != null) {
            value = supplier.get();
            supplier = null;
        }
        return value;
    }
}