![]() To run any of the pure JSF 2 examples, open a console or shell and navigate to the directory (e.g. The main example is Auction - a version of the original ICEfaces 1.8 Auction Monitor application ported to run on ICEfaces 2 but modified to use only JSF standard components and Ajax Push. The Desktop Showcase provides demonstrations for the key features available in the ICEfaces ACE and ICECORE components. As such, they require fewer library dependencies. These applications use only standard JSF 2 components enhanced with the core ICEfaces framework. The examples under /icefaces/samples/core do not use the ICEfaces Component Suite. The reason is that the Ant builds can leave files or artifacts that can interfere with the Maven builds and lead to errors or incorrectly built. It allows to have in memory only a limited number of records and to meet any potential "back and forth" of the user.If you've built the entire source tree using Ant or you've built any of the samples using Ant and you want to start using Maven instead, you should do an 'ant clean' in the sample directory before attempting to use Maven to build them. Made the changes to component-showcase as described by Yip. Surely the third implementation is the best solution from all points of view. Tested content of zip file with ICEfaces 1.6.2 and also with trunk (rev 15202), does not work. Surely the second solution is the most potentially weak as in the worst case will keep in memory all the dataset. This duplication applies to java renderers, components codes, javascripts and css files as well. They are copied line by line, only difference is the change of package names from prime to ice. Public void setNumResults(int numResults)Īll implementations give the opportunity to retrieve records in a lazy way. We have looked in detail of all IceFaces Ace Components and more than 90 of IceFaces components are like Panel. Int firstIndexOfPreviusPage = firstIndexOfCurrentPage - (bufferSize / 3) Int firstIndexOfCurrentPage = pageSize * (currentPage - 1) * the index of the previous page's first element * Calculates the index of the previous page's first element These tutorials are designed for the older version of ICEfaces 1.8, and therefore have been deprecated and archived here for reference. * clears the map except the first element that MUST be kept Click on the box below to toggle button select / deselect functionality. LoadedData.put((startRow + j), (T) results.get(j)) The component is a simple UI button control for toggling boolean input values (ie.List results = dataAdapter.getBufferedData(startRow, numElementToFind) NumElementToFind = totalResultsNumber - startRow This.totalResultsNumber = totalResultsNumber Public LazyLoadingList(IDataProvider dataProvider, int pageSize, int totalResultsNumber) * totalResultsNumber, the total number of rows as result of the database count query. * pageSize, the number of rows to be showed in a table page ![]() * dataProvider, the object that will perform the query * class LazyLoadingList extends AbstractList * If pageSize is equals to totalResultsNumber, the dataTable will be non paginated: the first query will retrieve all the dataset. * This list loads and stores only the first page and the current page. This parameter 'is usually the result of a count query. Note that the constructor of the list accepts as incoming parameter totalResultsNumber, that is the total number of results to show in the table. When the user navigates in the following pages, they will be retrieved by method get() and saved in a different list. This list keeps in memory a list of objects corresponding to the first page. ![]() They will be initialized in the page backingBean and used in this way in the. Let's see three possible implementations to implement the lazy loading of the list. The solution is to manage the list of results in a lazy way: the list itself will retrieve the records to show in the current page and only when there will be a real need.īesides this, we need also to manage the total page number: the paginator in fact invokes the method size() of the list supplied to the table calculates the number of pages. The main weakness of this component lies in the difficulty to handle large data sets: ice:dataTable component need to receive a list containing all rows that will gradually showed.Īs long as we are in the order of some hundreds of records, there is no problem to provide the entire results list to the component but if they begin to be thousands, keep in memory such a quantity of objects can be an issue. This component, together with ice:dataPaginator makes it possible to paginate the entire data set of a table, showing only N rows per page. ![]() IceFaces provides numerous components to facilitate the development of web applications.Īmong these, one of the most 'useful' is definitely ice:dataTable.
0 Comments
Leave a Reply. |