protected void checkIdentifierFormat()

in client/src/main/java/org/apache/qpid/client/message/JMSHeaderAdapter.java [407:474]
32 lines of code
16 McCabe index (conditional complexity)

    protected void checkIdentifierFormat(CharSequence propertyName)
    {
//        JMS requirements 3.5.1 Property Names
//        Identifiers:
//        - An identifier is an unlimited-length character sequence that must begin
//          with a Java identifier start character; all following characters must be Java
//          identifier part characters. An identifier start character is any character for
//          which the method Character.isJavaIdentifierStart returns true. This includes
//          '_' and '$'. An identifier part character is any character for which the
//          method Character.isJavaIdentifierPart returns true.
//        - Identifiers cannot be the names NULL, TRUE, or FALSE.
//          Identifiers cannot be NOT, AND, OR, BETWEEN, LIKE, IN, IS, or
//          ESCAPE.
//          Identifiers are either header field references or property references. The
//          type of a property value in a message selector corresponds to the type
//          used to set the property. If a property that does not exist in a message is
//          referenced, its value is NULL. The semantics of evaluating NULL values
//          in a selector are described in Section 3.8.1.2, Null Values.
//          The conversions that apply to the get methods for properties do not
//          apply when a property is used in a message selector expression. For
//          example, suppose you set a property as a string value, as in the
//          following:
//              myMessage.setStringProperty("NumberOfOrders", "2")
//          The following expression in a message selector would evaluate to false,
//          because a string cannot be used in an arithmetic expression:
//          "NumberOfOrders > 1"
//          Identifiers are case sensitive.
//          Message header field references are restricted to JMSDeliveryMode,
//          JMSPriority, JMSMessageID, JMSTimestamp, JMSCorrelationID, and
//          JMSType. JMSMessageID, JMSCorrelationID, and JMSType values may be
//          null and if so are treated as a NULL value.

        if (STRICT_JMS)
        {
            // JMS start character
            if (!(Character.isJavaIdentifierStart(propertyName.charAt(0))))
            {
                throw new IllegalArgumentException("Identifier '" + propertyName + "' does not start with a valid JMS identifier start character");
            }

            // JMS part character
            int length = propertyName.length();
            for (int c = 1; c < length; c++)
            {
                if (!(Character.isJavaIdentifierPart(propertyName.charAt(c))))
                {
                    throw new IllegalArgumentException("Identifier '" + propertyName + "' contains an invalid JMS identifier character");
                }
            }

            // JMS invalid names
            if ((propertyName.equals("NULL")
                 || propertyName.equals("TRUE")
                 || propertyName.equals("FALSE")
                 || propertyName.equals("NOT")
                 || propertyName.equals("AND")
                 || propertyName.equals("OR")
                 || propertyName.equals("BETWEEN")
                 || propertyName.equals("LIKE")
                 || propertyName.equals("IN")
                 || propertyName.equals("IS")
                 || propertyName.equals("ESCAPE")))
            {
                throw new IllegalArgumentException("Identifier '" + propertyName + "' is not allowed in JMS");
            }
        }

    }