Java support

[raderio]

Is it possible to use this library with Java language? It will increase the popularity if it will possible to use it also in Java and have Kotlin DSL

[KenjiOhtsuka]

@raderio

I guess it is available to use this library with Java, but I have not tried.

[KenjiOhtsuka]

@raderio What kind of support do you expect?

[KenjiOhtsuka]

@raderio Hi, how is it going? If writing migration classes in Java, they will be something like this.

package com.improve_future.harmonica_test.jarmonica.migration;

import com.improve_future.harmonica.core.AbstractMigration;
import com.improve_future.harmonica.core.table.TableBuilder;
import kotlin.Unit;
import kotlin.jvm.functions.Function1;

public class M2020012345678_Migration extends AbstractMigration {
    @Override
    public void up() {
        createTable("test_table", new Function1<TableBuilder, Unit>() {
            @Override
            public Unit invoke(TableBuilder tableBuilder) {
               tableBuilder.integer("integer_column", false, (long) 10, false);
               return Unit.INSTANCE;
            }
        });
    }

    @Override
    public void down() {

    }
}

As a Kotlin feature, Kotlin can coexist in Java projects. So you can write it in Kotlin even if your project is in Java.

References

• https://stackoverflow.com/questions/53123217/call-higher-order-function-of-kotlin-from-java