.runtime-deploy.3.0.5.source-code.LazyTemplate.txt Maven / Gradle / Ivy
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A Speedment bundle that shades all dependencies into one jar. This is
useful when deploying an application on a server.
/**
*
* Copyright (c) 2006-2017, Speedment, Inc. All Rights Reserved.
*
* 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.speedment.common.lazy.specialized;
{$1}
import com.speedment.common.lazy.Lazy;
import static java.util.Objects.requireNonNull;
import java.util.function.Supplier;
/**
* Specialized Lazy initialization class for {$0} types.
*
* @author Per Minborg
*/
public final class Lazy{$0} implements Lazy<{$2}> {
private volatile {$2} value;
private Lazy{$0}() {
}
@Override
public {$2} getOrCompute(Supplier<{$2}> supplier) {
// With this local variable, we only need to do one volatile read
final {$2} result = value;
return result == null ? maybeCompute(supplier) : result;
}
private synchronized {$2} maybeCompute(Supplier<{$2}> supplier) {
if (value == null) {
value = requireNonNull(supplier.get());
}
return value;
}
public static Lazy{$0} create() {
return new Lazy{$0}();
}
}