Allow to use Supplier from java8 and guava as Randomizer

[Toilal]

Create a new PopulatorBuilder method supporting Supplier instead of Randomizer.

class PopulatorBuilder8 extends PopulatorBuilder {
    public PopulatorBuilder registerRandomizer(final Class type, final Class fieldType, final String fieldName, final Supplier<?> randomizer) {
        return super.registerRandomizer(type, fieldType, fieldName, Java8Adapters.adapt(randomizer)):
    }
}

Same idea for guava Supplier.

It requires #26 to keep support of java version. (jpopulator-java8 and jpopulator-guava modules)

[fmbenhassine]

Indeed, great idea 👍 Thank you Rémi!

Let's plan that for next release 😃

[fmbenhassine]

I was trying to add support for Supplier in the Builder but this would make the library require Java 8 as minimum Java version (while some people are still using Java 6, example in #43 ) .

I was not able to use java source level to 1.8 and target level to 1.6 (because only random-beans-java8 module requires Java 8). So I need to pay attention to not use Java 8 APIs outside this module..

As of today, the library is compiled with Java 8 but the binary is still Java 6 compatible.

[PascalSchumacher]

pull request which adds the feature to use a java8 supplier: #96

[fmbenhassine]

Hi @Toilal

I've added support to use Java 8 suppliers as randomizers.

It would be great to give it a try if possible to see if it corresponds to what you have requested.
Many thanks upfront.

Kind regards
Mahmoud

[Toilal]

I think it's good thanks ! I'll effectively try later.

[fmbenhassine]

Hi Rémi,

No problem, take your time.

This will be released soon in v3.0.0
In case of any issue please file a bug.

Note that support for the standard Java 8 API Supplier has been added. Support for guava API will not be included since it is specific.

Kind regards
Mahmoud