MyRockerTemplate.java

package conf;

import com.fizzed.rocker.RockerContent;
import com.fizzed.rocker.RockerModel;
import ninja.validation.Validation;

import java.util.Objects;
import java.util.Optional;
import java.util.stream.Collectors;
import java.util.stream.Stream;

/**
 * Created by fk on 04.04.2016.
 */
public abstract class MyRockerTemplate extends com.fizzed.ninja.rocker.NinjaRockerTemplate
{
    public MyRockerTemplate(RockerModel model)
    {
        super(model);
    }

    public String ifTrue(boolean value, String content)
    {
        return value ? content : "";
    }

    public RockerContent ifTrue(boolean value, RockerContent content)
    {
        return value ? content : RockerContent.NONE;
    }

    public boolean hasViolation(Validation validation, String key)
    {
        return Stream.concat(validation.getBeanViolations().stream(), validation.getFieldViolations().stream())
                     .anyMatch(fv -> fv.field.equalsIgnoreCase(key));
    }

    public static String renderViolations(Validation validation, String key)
    {
        return Stream.concat(validation.getBeanViolations().stream(), validation.getFieldViolations().stream())
                     .filter(fv -> fv.field.equalsIgnoreCase(key))
                     .map(fv -> fv.constraintViolation.getMessageKey())
                     .collect(Collectors.joining("<br />"));
    }


    public String toString(Optional<?> object)
    {
        return toString(object.map(Object::toString).orElse(null), "");
    }

    public String toString(Object object)
    {
        return toString(object, "");
    }

    public String toString(Object object, String dflt)
    {
        return Objects.toString(object, dflt);
    }
}