package liquibase.statement;
   
   import java.util.ArrayList;
   import java.util.Arrays;
   import java.util.Collections;
   import java.util.List;
   
   public class PrimaryKeyConstraint implements ColumnConstraint {
   
      private String constraintName;
  
      // used for PK's index configuration
      private String tablespace;
  
      private List<String> columns = new ArrayList<String>();
  
      public PrimaryKeyConstraint() {
      }
  
      public PrimaryKeyConstraint(String constraintName) {
          this.constraintName = constraintName;
      }
  
      public String getConstraintName() {
          return constraintName;
      }
  
      public String getTablespace() {
          return tablespace;
      }
  
      public void setTablespace(String tablespace) {
          this.tablespace = tablespace;
      }
  
      public List<String> getColumns() {
          return Collections.unmodifiableList(columns);
      }
  
      public PrimaryKeyConstraint addColumns(String... columns) {
          this.columns.addAll(Arrays.asList(columns));
  
          return this;
      }
  }