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  package org.apache.cayenne.dbsync.merge.token.model;
  
  import org.apache.cayenne.dbsync.merge.context.MergerContext;
  import org.apache.cayenne.dbsync.merge.factory.MergerTokenFactory;
  import org.apache.cayenne.dbsync.merge.token.MergerToken;
  import org.apache.cayenne.map.DbAttribute;
  import org.apache.cayenne.map.DbEntity;
  import org.apache.cayenne.map.event.AttributeEvent;
  
  import java.util.Collection;
  import java.util.HashSet;
  import java.util.Set;
  
  public class SetPrimaryKeyToModel extends AbstractToModelToken.Entity {
  
      private Collection<DbAttribute> primaryKeyOriginal;
      private Collection<DbAttribute> primaryKeyNew;
      private String detectedPrimaryKeyName;
      private Set<String> primaryKeyNewAttributeNames = new HashSet<>();
  
      public SetPrimaryKeyToModel(DbEntity entity,
              Collection<DbAttribute> primaryKeyOriginal,
              Collection<DbAttribute> primaryKeyNew, String detectedPrimaryKeyName) {
          super("Set Primary Key", 105, entity);
          
          this.primaryKeyOriginal = primaryKeyOriginal;
          this.primaryKeyNew = primaryKeyNew;
          this.detectedPrimaryKeyName = detectedPrimaryKeyName;
          
          for (DbAttribute attr : primaryKeyNew) {
              primaryKeyNewAttributeNames.add(attr.getName().toUpperCase());
          }
      }
  
      @Override
      public MergerToken createReverse(MergerTokenFactory factory) {
          return factory.createSetPrimaryKeyToDb(
                  getEntity(),
                  primaryKeyNew,
                  primaryKeyOriginal,
                  detectedPrimaryKeyName);
      }
  
      @Override
      public void execute(MergerContext mergerContext) {
          DbEntity e = getEntity();
  
          for (DbAttribute attr : e.getAttributes()) {
  
              boolean wasPrimaryKey = attr.isPrimaryKey();
              boolean willBePrimaryKey = primaryKeyNewAttributeNames.contains(attr
                      .getName()
                      .toUpperCase());
  
              if (wasPrimaryKey != willBePrimaryKey) {
                  attr.setPrimaryKey(willBePrimaryKey);
                  e.dbAttributeChanged(new AttributeEvent(this, attr, e));
                  mergerContext.getDelegate().dbAttributeModified(attr);
              }
          }
      }
  }
  