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This is the core library for Active Objects. It is generic and can be embedded in any environment. As such it is generic and won't contain all connection pooling, etc.

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package net.java.ao.util;

import javax.annotation.Nullable;
import java.util.Optional;
import java.util.stream.Stream;

@SuppressWarnings("OptionalUsedAsFieldOrParameterType")
public class StreamUtils {

    public static  Stream ofNullable(@Nullable T t) {
        return ofOptional(Optional.ofNullable(t));
    }

    private static  Stream ofOptional(Optional optional) {
        return optional.map(Stream::of).orElseGet(Stream::empty);

    }
}