Design pattern used in ExecutorCompletionService core java class

The ExecutorCompletionService is wrapper around the Executor class. I can think of many design patterns by looking at the ExecutorCompletionService class source code

public class ExecutorCompletionService<V> implements CompletionService<V>
{
    public ExecutorCompletionService(Executor executor) {
    }
}

• Proxy Design pattern
• Adapter Design pattern
• Decorator Design pattern
• Bridge Design pattern

Can anyone explain in details which design pattern we can categorize this class implementation? Thanks in Advance.