public void apply()

in impl/src/main/java/org/apache/myfaces/view/facelets/tag/ui/LegacyIncludeHandler.java [101:251]
130 lines of code
21 McCabe index (conditional complexity)

    public void apply(FaceletContext ctx, UIComponent parent) throws IOException, FacesException, FaceletException,
            ELException
    {
        AbstractFaceletContext actx = (AbstractFaceletContext) ctx;
        FaceletCompositionContext fcc = FaceletCompositionContext.getCurrentInstance(ctx);
        String path;
        boolean markInitialState = false;
        if (!src.isLiteral())
        {
            String uniqueId = actx.generateUniqueFaceletTagId(fcc.startComponentUniqueIdSection(), tagId);

            String restoredPath = (String) ComponentSupport.restoreInitialTagState(ctx, fcc, parent, uniqueId);
            if (restoredPath != null)
            {
                // If is not restore view phase, the path value should be
                // evaluated and if is not equals, trigger markInitialState stuff.
                if (!PhaseId.RESTORE_VIEW.equals(ctx.getFacesContext().getCurrentPhaseId()))
                {
                    path = this.src.getValue(ctx);
                    if (StringUtils.isBlank(path))
                    {
                        return;
                    }
                    if (!path.equals(restoredPath))
                    {
                        markInitialState = true;
                    }
                }
                else
                {
                    path = restoredPath;
                }
            }
            else
            {
                //No state restored, calculate path
                path = this.src.getValue(ctx);
            }
            ComponentSupport.saveInitialTagState(ctx, fcc, parent, uniqueId, path);
        }
        else
        {
            path = this.src.getValue(ctx);
        }
        try
        {
            if (StringUtils.isBlank(path))
            {
                return;
            }
            VariableMapper orig = ctx.getVariableMapper();
            ctx.setVariableMapper(new VariableMapperWrapper(orig));
            try
            {
                //Only ui:param could be inside ui:include.

                URL url = null;
                boolean oldMarkInitialState = false;
                Boolean isBuildingInitialState = null;
                // if we are in ProjectStage Development and the path equals "jakarta.faces.error.xhtml"
                // we should include the default error page
                if (ctx.getFacesContext().isProjectStage(ProjectStage.Development) 
                        && ERROR_PAGE_INCLUDE_PATH.equals(path))
                {
                    url = ClassUtils.getResource(ERROR_FACELET);
                }
                if (markInitialState)
                {
                    //set markInitialState flag
                    oldMarkInitialState = fcc.isMarkInitialState();
                    fcc.setMarkInitialState(true);
                    isBuildingInitialState = (Boolean) ctx.getFacesContext().getAttributes().put(
                            StateManager.IS_BUILDING_INITIAL_STATE, Boolean.TRUE);
                }
                try
                {
                    if (_params != null)
                    {
                        // ui:include defines a new TemplateContext, but ui:param EL expressions
                        // defined inside should be built before the new context is setup, to
                        // apply then after. The final effect is EL expressions will be resolved
                        // correctly when nested ui:params with the same name or based on other
                        // ui:params are used.
                        
                        String[] names = new String[_params.length];
                        ValueExpression[] values = new ValueExpression[_params.length];
                        
                        for (int i = 0; i < _params.length; i++)
                        {
                            names[i] = _params[i].getName(ctx);
                            values[i] = _params[i].getValue(ctx);
                        }

                        for (int i = 0; i < _params.length; i++)
                        {
                            _params[i].apply(ctx, parent, names[i], values[i]);
                        }
                    }

                    if (url == null)
                    {
                        ctx.includeFacelet(parent, path);
                    }
                    else
                    {
                        ctx.includeFacelet(parent, url);
                    }
                }
                finally
                {
                    if (markInitialState)
                    {
                        //unset markInitialState flag
                        if (isBuildingInitialState == null)
                        {
                            ctx.getFacesContext().getAttributes().remove(
                                    StateManager.IS_BUILDING_INITIAL_STATE);
                        }
                        else
                        {
                            ctx.getFacesContext().getAttributes().put(
                                    StateManager.IS_BUILDING_INITIAL_STATE, isBuildingInitialState);
                        }
                        fcc.setMarkInitialState(oldMarkInitialState);
                    }
                }
            }
            finally
            {
                ctx.setVariableMapper(orig);
            }
        }
        finally
        {
            if (!src.isLiteral())
            {
                fcc.endComponentUniqueIdSection();
                
                if (fcc.isUsingPSSOnThisView() && fcc.isRefreshTransientBuildOnPSS() &&
                    !fcc.isRefreshingTransientBuild())
                {
                    //Mark the parent component to be saved and restored fully.
                    ComponentSupport.markComponentToRestoreFully(ctx.getFacesContext(), parent);
                }
                if (fcc.isDynamicComponentSection())
                {
                    ComponentSupport.markComponentToRefreshDynamically(ctx.getFacesContext(), parent);
                }
            }
        }
    }