Program: 59592
Project: 59592
Buggy source:
public String toJpql(BoolCommonExpression expression){
  if (expression instanceof EqExpression)   return bceToJpql("String_Node_Str",(EqExpression)expression);
  if (expression instanceof NeExpression)   return bceToJpql("String_Node_Str",(NeExpression)expression);
  if (expression instanceof AndExpression) {
    AndExpression e=(AndExpression)expression;
    return String.format("String_Node_Str",toJpql(e.getLHS()),toJpql(e.getRHS()));
  }
  if (expression instanceof OrExpression) {
    OrExpression e=(OrExpression)expression;
    return String.format("String_Node_Str",toJpql(e.getLHS()),toJpql(e.getRHS()));
  }
  if (expression instanceof BooleanLiteral)   return Boolean.toString(((BooleanLiteral)expression).getValue());
  if (expression instanceof GtExpression)   return bceToJpql("String_Node_Str",(GtExpression)expression);
  if (expression instanceof LtExpression)   return bceToJpql("String_Node_Str",(LtExpression)expression);
  if (expression instanceof GeExpression)   return bceToJpql("String_Node_Str",(GeExpression)expression);
  if (expression instanceof LeExpression)   return bceToJpql("String_Node_Str",(LeExpression)expression);
  if (expression instanceof NotExpression) {
    NotExpression e=(NotExpression)expression;
    return String.format("String_Node_Str",toJpql(e.getExpression()));
  }
  if (expression instanceof SubstringOfMethodCallExpression) {
    SubstringOfMethodCallExpression e=(SubstringOfMethodCallExpression)expression;
    String value=(String)toJpql(e.getValue());
    value=value.replace("String_Node_Str","String_Node_Str");
    return String.format("String_Node_Str",toJpql(e.getTarget()),value);
  }
  if (expression instanceof EndsWithMethodCallExpression) {
    EndsWithMethodCallExpression e=(EndsWithMethodCallExpression)expression;
    String value=(String)toJpql(e.getValue());
    value=value.replace("String_Node_Str","String_Node_Str");
    return String.format("String_Node_Str",toJpql(e.getTarget()),value);
  }
  if (expression instanceof StartsWithMethodCallExpression) {
    StartsWithMethodCallExpression e=(StartsWithMethodCallExpression)expression;
    String value=(String)toJpql(e.getValue());
    value=value.replace("String_Node_Str","String_Node_Str");
    return String.format("String_Node_Str",toJpql(e.getTarget()),value);
  }
  if (expression instanceof IsofExpression) {
    IsofExpression e=(IsofExpression)expression;
    String clazz=toJpql(e.getExpression());
    if (clazz == null) {
      clazz=tableAlias;
    }
    return String.format("String_Node_Str",clazz,e.getType());
  }
  if (expression instanceof ParenExpression) {
    ParenExpression e=(ParenExpression)expression;
    return "String_Node_Str" + toJpql((ParenExpression)e.getExpression()) + "String_Node_Str";
  }
  if (expression instanceof BoolParenExpression) {
    BoolParenExpression e=(BoolParenExpression)expression;
    return "String_Node_Str" + toJpql((BoolCommonExpression)e.getExpression()) + "String_Node_Str";
  }
  throw new UnsupportedOperationException("String_Node_Str" + expression);
}

Fixed version (ground truth):
public String toJpql(BoolCommonExpression expression){
  if (expression instanceof EqExpression)   return bceToJpql("String_Node_Str",(EqExpression)expression);
  if (expression instanceof NeExpression)   return bceToJpql("String_Node_Str",(NeExpression)expression);
  if (expression instanceof AndExpression) {
    AndExpression e=(AndExpression)expression;
    return String.format("String_Node_Str",toJpql(e.getLHS()),toJpql(e.getRHS()));
  }
  if (expression instanceof OrExpression) {
    OrExpression e=(OrExpression)expression;
    return String.format("String_Node_Str",toJpql(e.getLHS()),toJpql(e.getRHS()));
  }
  if (expression instanceof BooleanLiteral)   return Boolean.toString(((BooleanLiteral)expression).getValue());
  if (expression instanceof GtExpression)   return bceToJpql("String_Node_Str",(GtExpression)expression);
  if (expression instanceof LtExpression)   return bceToJpql("String_Node_Str",(LtExpression)expression);
  if (expression instanceof GeExpression)   return bceToJpql("String_Node_Str",(GeExpression)expression);
  if (expression instanceof LeExpression)   return bceToJpql("String_Node_Str",(LeExpression)expression);
  if (expression instanceof NotExpression) {
    NotExpression e=(NotExpression)expression;
    if (e.getExpression() instanceof BoolParenExpression) {
      return String.format("String_Node_Str",toJpql(e.getExpression()));
    }
    return String.format("String_Node_Str",toJpql(e.getExpression()));
  }
  if (expression instanceof SubstringOfMethodCallExpression) {
    SubstringOfMethodCallExpression e=(SubstringOfMethodCallExpression)expression;
    String value=(String)toJpql(e.getValue());
    value=value.replace("String_Node_Str","String_Node_Str");
    return String.format("String_Node_Str",toJpql(e.getTarget()),value);
  }
  if (expression instanceof EndsWithMethodCallExpression) {
    EndsWithMethodCallExpression e=(EndsWithMethodCallExpression)expression;
    String value=(String)toJpql(e.getValue());
    value=value.replace("String_Node_Str","String_Node_Str");
    return String.format("String_Node_Str",toJpql(e.getTarget()),value);
  }
  if (expression instanceof StartsWithMethodCallExpression) {
    StartsWithMethodCallExpression e=(StartsWithMethodCallExpression)expression;
    String value=(String)toJpql(e.getValue());
    value=value.replace("String_Node_Str","String_Node_Str");
    return String.format("String_Node_Str",toJpql(e.getTarget()),value);
  }
  if (expression instanceof IsofExpression) {
    IsofExpression e=(IsofExpression)expression;
    String clazz=toJpql(e.getExpression());
    if (clazz == null) {
      clazz=tableAlias;
    }
    return String.format("String_Node_Str",clazz,e.getType());
  }
  if (expression instanceof ParenExpression) {
    ParenExpression e=(ParenExpression)expression;
    return "String_Node_Str" + toJpql((ParenExpression)e.getExpression()) + "String_Node_Str";
  }
  if (expression instanceof BoolParenExpression) {
    BoolParenExpression e=(BoolParenExpression)expression;
    return "String_Node_Str" + toJpql((BoolCommonExpression)e.getExpression()) + "String_Node_Str";
  }
  throw new UnsupportedOperationException("String_Node_Str" + expression);
}