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   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
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   *    https://www.apache.org/licenses/LICENSE-2.0
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  package org.apache.cayenne.exp.parser;
  
  import java.io.IOException;
  import java.util.List;
  
  import org.apache.cayenne.exp.ExpressionException;
  
  /**
   * Common node for likeIgnoreCase and notLikeIgnoreCase
   */
  abstract class IgnoreCaseNode extends PatternMatchNode {
      IgnoreCaseNode(int i, boolean ignoringCase) {
          super(i, ignoringCase);
      }
  
      IgnoreCaseNode(int i, boolean ignoringCase, char escapeChar) {
          super(i, ignoringCase, escapeChar);
      }
  
      @Override
      protected void appendChildrenAsEJBQL(List<Object> parameterAccumulator, Appendable out, String rootId) throws IOException {
          // with like, first expression is always path, second is a literal,
          // which must be uppercased
          out.append("upper(");
          ((SimpleNode) children[0]).appendAsEJBQL(parameterAccumulator, out, rootId);
          out.append(") ");
          out.append(getEJBQLExpressionOperator(0));
          out.append(" ");
  
          Object literal = ((ASTScalar) children[1]).getValue();
          if (!(literal instanceof String)) {
              throw new ExpressionException("Literal value should be a string");
          }
          SimpleNode.encodeScalarAsEJBQL(parameterAccumulator, out, ((String) literal).toUpperCase());
      }
  }
  