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RePlay is a fork of the Play1 framework, created by Codeborne.

There is a newer version: 2.6.2

package play.data.validation;

import java.util.Collection;
import net.sf.oval.Validator;
import net.sf.oval.configuration.annotation.AbstractAnnotationCheck;
import net.sf.oval.context.OValContext;
import play.db.Model.BinaryField;
import play.exceptions.UnexpectedException;

public class RequiredCheck extends AbstractAnnotationCheck {

  static final String mes = "validation.required";

  @Override
  public boolean isSatisfied(
      Object validatedObject, Object value, OValContext context, Validator validator) {
    if (value == null) {
      return false;
    }
    if (value instanceof String) {
      return !value.toString().trim().isEmpty();
    }
    if (value instanceof Collection) {
      return !((Collection) value).isEmpty();
    }
    if (value instanceof BinaryField) {
      return ((BinaryField) value).exists();
    }
    if (value.getClass().isArray()) {
      try {
        return java.lang.reflect.Array.getLength(value) > 0;
      } catch (Exception e) {
        throw new UnexpectedException(e);
      }
    }
    return true;
  }
}