import org.gradle.jvm.toolchain.JavaInstallationMetadata;

import javax.annotation.Nullable;
import java.io.File;

public class DefaultJavaCompileSpecFactory extends AbstractJavaCompileSpecFactory<DefaultJavaCompileSpec> {
    public DefaultJavaCompileSpecFactory(CompileOptions compileOptions, @Nullable JavaInstallationMetadata toolchain) {
        super(compileOptions, toolchain);
    }

    @Override

            javaToolchain.isCurrentJvm() >> isCurrent
            javaToolchain.languageVersion >> JavaLanguageVersion.of(isCurrent ? "8" : toolchain)
        }

        when:
        DefaultJavaCompileSpecFactory factory = new DefaultJavaCompileSpecFactory(options, javaToolchain)
        def spec = factory.create()

        then:
        spec instanceof DefaultJavaCompileSpec

import org.gradle.api.internal.tasks.compile.CompilerForkUtils;
import org.gradle.api.internal.tasks.compile.DefaultJavaCompileSpec;
import org.gradle.api.internal.tasks.compile.DefaultJavaCompileSpecFactory;
import org.gradle.api.internal.tasks.compile.HasCompileOptions;
import org.gradle.api.internal.tasks.compile.JavaCompileExecutableUtils;
import org.gradle.api.internal.tasks.compile.JavaCompileSpec;