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  package org.apache.cayenne.dba.derby.sqltree;
  
  import java.sql.Types;
  
  import org.apache.cayenne.access.sqlbuilder.QuotingAppendable;
  import org.apache.cayenne.access.sqlbuilder.sqltree.Node;
  import org.apache.cayenne.access.sqlbuilder.sqltree.ValueNode;
  import org.apache.cayenne.map.DbAttribute;
  
  /**
   * @since 4.2
   */
  public class DerbyValueNode extends ValueNode {
  
      public DerbyValueNode(Object value, boolean isArray, DbAttribute attribute, boolean needBinding) {
          super(value, isArray, attribute, needBinding);
      }
  
      protected void appendStringValue(QuotingAppendable buffer, CharSequence value) {
          if(getAttribute() == null || (getAttribute() != null && getAttribute().getType() == Types.CLOB)) {
              buffer.append(" CAST(? AS VARCHAR(").append(Math.max(1,value.length())).append("))");
          } else {
              buffer.append(" ?");
          }
          addValueBinding(buffer, value);
      }
  
      @Override
      public Node copy() {
          return new DerbyValueNode(getValue(), isArray(), getAttribute(), isNeedBinding());
      }
  }
  