import org.gradle.internal.Factory;

import javax.annotation.Nullable;
import java.util.Date;

public abstract class ExternalResourceMetaDataCompare {
    public static boolean isDefinitelyUnchanged(@Nullable ExternalResourceMetaData local, Factory<ExternalResourceMetaData> remoteFactory) {
        if (local == null) {
            return false;
        }

        String localEtag = local.getEtag();

            val remoteMetaData = externalResourceConnector.getMetaData(externalResourceName, true)

            if (cached != null && ExternalResourceMetaDataCompare.isDefinitelyUnchanged(cached.externalResourceMetaData) { remoteMetaData }) {
                // reset the age of the cached entry to zero

            def create() { remote }
        })
    }

    boolean compare(ExternalResourceMetaData local, Factory<ExternalResourceMetaData> remoteFactory) {
        unchanged = ExternalResourceMetaDataCompare.isDefinitelyUnchanged(local, remoteFactory)
        unchanged
    }

                return null;
            }

            // Is the cached version still current?
            if (cached != null) {
                boolean isUnchanged = ExternalResourceMetaDataCompare.isDefinitelyUnchanged(
                    cached.getExternalResourceMetaData(),
                    () -> remoteMetaData
                );

                if (isUnchanged) {