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  package org.apache.cayenne.modeler.editor.validation;
  
  import org.apache.cayenne.map.ObjAttribute;
  import org.apache.cayenne.modeler.editor.ObjAttributeTableModel;
  import org.apache.cayenne.modeler.editor.wrapper.ObjAttributeWrapper;
  import org.apache.cayenne.project.validation.ConfigurationNodeValidator;
  import org.apache.cayenne.project.validation.ValidationConfig;
  import org.apache.cayenne.validation.ValidationResult;
  
  import java.util.function.Supplier;
  
  public class ObjAttributeWrapperValidator extends ConfigurationNodeValidator<ObjAttributeWrapper> {
  
      /**
       * @param configSupplier the config defining the behavior of this validator.
       * @since 5.0
       */
      public ObjAttributeWrapperValidator(Supplier<ValidationConfig> configSupplier) {
          super(configSupplier);
      }
  
      @Override
      public void validate(ObjAttributeWrapper node, ValidationResult validationResult) {
          validateName(node, validationResult);
      }
  
      private void validateName(ObjAttributeWrapper wrapper, ValidationResult validationResult) {
          if (isAttributeNameOverlapped(wrapper)) {
              addFailure(validationResult, new AttributeValidationFailure(
                      ObjAttributeTableModel.OBJ_ATTRIBUTE,
                      "Duplicate attribute name."));
          }
      }
  
      /**
       * @return true if entity has attribute with the same name.
       */
      private boolean isAttributeNameOverlapped(ObjAttributeWrapper wrapper) {
      	ObjAttribute otherAttribute = wrapper.getEntity().getAttributeMap().get(wrapper.getName());
          return otherAttribute != null && wrapper.getValue() != otherAttribute;
      }
  }
  