private void addExpressionBinding()

in tapestry-framework/src/org/apache/tapestry/BaseComponentTemplateLoader.java [404:466]
52 lines of code
5 McCabe index (conditional complexity)

    private void addExpressionBinding(
            IComponent component,
            IComponentSpecification spec,
            String name,
            String expression,
            ILocation location)
    {

        // If matches a formal parameter name, allow it to be set
        // unless there's already a binding.

        boolean isFormal = (spec.getParameter(name) != null);

        if (isFormal)
        {
            if (component.getBinding(name) != null)
                throw new ApplicationRuntimeException(
                        Tapestry.format(
                                "BaseComponent.dupe-template-expression",
                                name,
                                component.getExtendedId(),
                                _loadComponent.getExtendedId()),
                        component,
                        location,
                        null);
        }
        else
        {
            if (!spec.getAllowInformalParameters())
                throw new ApplicationRuntimeException(
                        Tapestry.format(
                                "BaseComponent.template-expression-for-informal-parameter",
                                name,
                                component.getExtendedId(),
                                _loadComponent.getExtendedId()),
                        component,
                        location,
                        null);

            // If the name is reserved (matches a formal parameter
            // or reserved name, caselessly), then skip it.

            if (spec.isReservedParameterName(name))
                throw new ApplicationRuntimeException(
                        Tapestry.format(
                                "BaseComponent.template-expression-for-reserved-parameter",
                                name,
                                component.getExtendedId(),
                                _loadComponent.getExtendedId()),
                        component,
                        location,
                        null);
        }

        IBinding binding =
                new ExpressionBinding(
                        _pageSource.getResourceResolver(),
                        _loadComponent,
                        expression,
                        location);

        component.setBinding(name, binding);
    }