public synchronized Object init()

in velocity-engine-core/src/main/java/org/apache/velocity/runtime/parser/node/ASTDirective.java [101:228]
93 lines of code
18 McCabe index (conditional complexity)

    public synchronized Object init(InternalContextAdapter context, Object data)
    throws TemplateInitException
    {
        Token t;

        /* method is synchronized to avoid concurrent directive initialization **/

        if (!isInitialized)
        {
            super.init( context, data );

            /*
             * handle '$' and '#' chars prefix
             */
            t = getFirstToken();
            int pos = -1;
            while (t != null && (pos = t.image.lastIndexOf(rsvc.getParserConfiguration().getHashChar())) == -1)
            {
                t = t.next;
            }
            if (t != null && pos > 0)
            {
                morePrefix = t.image.substring(0, pos);
            }

            /*
             *  only do things that are not context dependent
             */

            if (parser.isDirective( directiveName ))
            {
                isDirective = true;

                try
                {
                    directive = parser.getDirective( directiveName )
                        .getClass().newInstance();
                }
                catch (InstantiationException | IllegalAccessException e)
                {
                    throw new VelocityException(
                            "Couldn't initialize directive of class " +
                            parser.getDirective(directiveName).getClass().getName(),
                            e, rsvc.getLogContext().getStackTrace());
                }

                t = getFirstToken();
                if (t.kind == StandardParserConstants.WHITESPACE) t = t.next;
                directive.setLocation(t.beginLine, t.beginColumn, getTemplate());
                directive.init(rsvc, context, this);
            }
            else if( directiveName.startsWith(String.valueOf(rsvc.getParserConfiguration().getAtChar())) )
            {
                if( this.jjtGetNumChildren() > 0 )
                {
                    // block macro call (normal macro call but has AST body)
                    directiveName = directiveName.substring(1);

                    directive = new BlockMacro();
                    directive.setLocation(getLine(), getColumn(), getTemplate());

                    try
                    {
                        ((BlockMacro)directive).init( rsvc, directiveName, context, this );
                    }
                    catch (TemplateInitException die)
                    {
                        throw new TemplateInitException(die.getMessage(),
                            (ParseException) die.getCause(),
                            rsvc.getLogContext().getStackTrace(),
                            die.getTemplateName(),
                            die.getColumnNumber() + getColumn(),
                            die.getLineNumber() + getLine());
                    }
                    isDirective = true;
                }
                else
                {
                    // this is a fake block macro call without a body. e.g. #@foo
                    // just render as it is
                    isDirective = false;
                }
            }
            else
            {
                /*
                  Create a new RuntimeMacro
                 */
                directive = new RuntimeMacro();
                directive.setLocation(getLine(), getColumn(), getTemplate());

                /*
                  Initialize it
                 */
                try
                {
                    ((RuntimeMacro)directive).init( rsvc, directiveName, context, this );
                }

                /*
                  correct the line/column number if an exception is caught
                 */
                catch (TemplateInitException die)
                {
                    throw new TemplateInitException(die.getMessage(),
                            (ParseException) die.getCause(),
                            rsvc.getLogContext().getStackTrace(),
                            die.getTemplateName(),
                            die.getColumnNumber() + getColumn(),
                            die.getLineNumber() + getLine());
                }
                isDirective = true;

            }

            isInitialized = true;

            saveTokenImages();
            cleanupParserAndTokens();
        }

        if (morePrefix.length() == 0 && rsvc.getSpaceGobbling() == SpaceGobbling.STRUCTURED && isInitialized && isDirective && directive.getType() == Directive.BLOCK)
        {
            NodeUtils.fixIndentation(this, prefix);
        }

        return data;
    }