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  package org.apache.cayenne.project.validation;
  
  import org.apache.cayenne.configuration.DataChannelDescriptor;
  import org.apache.cayenne.map.DataMap;
  import org.apache.cayenne.map.Embeddable;
  import org.apache.cayenne.util.Util;
  import org.apache.cayenne.validation.ValidationResult;
  
  import java.util.function.Supplier;
  
  class EmbeddableValidator extends ConfigurationNodeValidator<Embeddable> {
  
      /**
       * @param configSupplier the config defining the behavior of this validator.
       * @since 5.0
       */
      public EmbeddableValidator(Supplier<ValidationConfig> configSupplier) {
          super(configSupplier);
      }
  
      @Override
      public void validate(Embeddable node, ValidationResult validationResult) {
          on(node, validationResult)
                  .performIfEnabled(Inspection.EMBEDDABLE_NO_NAME, this::checkForName)
                  .performIfEnabled(Inspection.EMBEDDABLE_NAME_DUPLICATE, this::checkForNameDuplicates);
      }
  
      private void checkForName(Embeddable embeddable, ValidationResult validationResult) {
          String name = embeddable.getClassName();
  
          // Must have name
          if (Util.isEmptyString(name)) {
              addFailure(validationResult, embeddable, "Unnamed Embeddable");
          }
      }
  
      private void checkForNameDuplicates(Embeddable embeddable, ValidationResult validationResult) {
          String name = embeddable.getClassName();
          DataMap map = embeddable.getDataMap();
          if (map == null || Util.isEmptyString(name)) {
              return;
          }
  
          // check for duplicate names in the parent context
          for (Embeddable otherEmb : map.getEmbeddables()) {
              if (otherEmb == embeddable) {
                  continue;
              }
              if (name.equals(otherEmb.getClassName())) {
                  addFailure(validationResult, embeddable, "Duplicate Embeddable class name: %s", name);
                  break;
              }
          }
  
          // check for duplicates in other DataMaps
          DataChannelDescriptor domain = map.getDataChannelDescriptor();
          if (domain == null) {
              return;
          }
          for (DataMap nextMap : domain.getDataMaps()) {
              if (nextMap == map) {
                  continue;
              }
  
              // note that lookup below will return the same embeddable due to the
              // shared namespace if not conflicts exist
              Embeddable conflictingEmbeddable = nextMap.getEmbeddable(name);
              if (conflictingEmbeddable != null && conflictingEmbeddable != embeddable) {
                  addFailure(validationResult, embeddable, "Duplicate Embeddable name in another DataMap: %s", name);
                  break;
              }
          }
      }
  }
  