public boolean isValidSyntax()

in ldap/model/src/main/java/org/apache/directory/api/ldap/model/schema/syntaxCheckers/DseTypeSyntaxChecker.java [134:273]
105 lines of code
27 McCabe index (conditional complexity)

    public boolean isValidSyntax( Object value )
    {
        String strValue;

        if ( value == null )
        {
            if ( LOG.isDebugEnabled() )
            {
                LOG.debug( I18n.err( I18n.ERR_13210_SYNTAX_INVALID, "null" ) );
            }
            
            return false;
        }

        if ( value instanceof String )
        {
            strValue = ( String ) value;
        }
        else if ( value instanceof byte[] )
        {
            strValue = Strings.utf8ToString( ( byte[] ) value );
        }
        else
        {
            strValue = value.toString();
        }

        // We must have at least '(cp)', '(xr)' or '(ca)'
        if ( strValue.length() < 4 )
        {
            if ( LOG.isDebugEnabled() )
            {
                LOG.debug( I18n.err( I18n.ERR_13210_SYNTAX_INVALID, value ) );
            }
            
            return false;
        }

        // Check the opening and closing parenthesis
        if ( ( strValue.charAt( 0 ) != '(' )
            || ( strValue.charAt( strValue.length() - 1 ) != ')' ) )
        {
            if ( LOG.isDebugEnabled() )
            {
                LOG.debug( I18n.err( I18n.ERR_13210_SYNTAX_INVALID, value ) );
            }
            
            return false;
        }

        Set<String> keywords = new HashSet<>();
        int len = strValue.length() - 1;
        boolean needKeyword = true;

        // 
        for ( int i = 1; i < len; /* */)
        {
            // Skip spaces
            while ( ( i < len ) && ( strValue.charAt( i ) == ' ' ) )
            {
                i++;
            }

            int pos = i;

            // Search for a keyword
            while ( ( i < len ) && Chars.isAlphaASCII( strValue, pos ) )
            {
                pos++;
            }

            if ( pos == i )
            {
                // No keyword : error
                if ( LOG.isDebugEnabled() )
                {
                    LOG.debug( I18n.err( I18n.ERR_13210_SYNTAX_INVALID, value ) );
                }
                
                return false;
            }

            String keyword = strValue.substring( i, pos );
            i = pos;

            if ( !DSE_BITS.contains( keyword ) )
            {
                // Unknown keyword
                if ( LOG.isDebugEnabled() )
                {
                    LOG.debug( I18n.err( I18n.ERR_13210_SYNTAX_INVALID, value ) );
                }
                
                return false;
            }

            // Check that the keyword has not been met
            if ( keywords.contains( keyword ) )
            {
                if ( LOG.isDebugEnabled() )
                {
                    LOG.debug( I18n.err( I18n.ERR_13210_SYNTAX_INVALID, value ) );
                }
                
                return false;
            }

            keywords.add( keyword );
            needKeyword = false;

            // Skip spaces
            while ( ( i < len ) && ( strValue.charAt( i ) == ' ' ) )
            {
                i++;
            }

            // Do we have another keyword ?
            if ( ( i < len ) && ( strValue.charAt( i ) == '$' ) )
            {
                // yes
                i++;
                needKeyword = true;
            }
        }

        // We are done
        if ( LOG.isDebugEnabled() )
        {
            if ( needKeyword )
            {
                LOG.debug( I18n.err( I18n.ERR_13210_SYNTAX_INVALID, value ) );
            }
            else
            {
                LOG.debug( I18n.msg( I18n.MSG_13701_SYNTAX_VALID, value ) );
            }
        }

        return !needKeyword;
    }