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Grid / sortable additionnal column

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	Grid / sortable additionnal column by Francois Malet :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Hello, I use Tapestry 5.1.0.5 My goal is to add a column to a grid and to make it sortable. Of course, this column is not part of the grid datasource (otherwise I wouldn't need to add it). I have written a page based on example provided here: http://wiki.apache.org/tapestry/Tapestry5GridComponent Everything seems to be ok (up and down arrows are displaid), but when I try to sort on this additionnal column, I get a nullpointer exception. (but when I try to sort on other columns it still works). So, I guess I've done something unporperly, but I don't manage to find what. Do u have any idea? Here is the error : java.lang.NullPointerException org.apache.tapestry5.internal.grid.CollectionGridDataSource$2.compare(CollectionGridDataSource.java:78) org.apache.tapestry5.internal.grid.CollectionGridDataSource$3.compare(CollectionGridDataSource.java:91) java.util.Arrays.mergeSort(Arrays.java:1284) Here is my class page : public class UploadsIndex { @Inject private UploadManager uploadManager; /** The model. / @Retain private BeanModel beanModel; /* The bean model source. / @Inject private BeanModelSource beanModelSource; /* The resources. */ @Inject private Messages messages; void pageLoaded() { beanModel=beanModelSource.createEditModel(Upload.class, messages); PropertyModel dModel= beanModel.add("download",null); dModel.sortable(true); } public BeanModel getBeanModel() { return beanModel; } public List<Upload> getAllUploads() { return uploadManager.findAll(); } @Property private Upload upload; } And here is the tml page : ... <body> <h1>All Uploads</h1> <t:grid t:id="grid" t:source="allUploads" row="upload" exclude="uploadId" t:model="beanModel" > <t:parameter name="downloadCell"> <t:actionlink t:id="downloadUpload" context="upload.uploadId">${upload.name}</t:actionlink> </t:parameter> </t:grid> </body> ... Thanks For your help! Kind Regards Emmanuel
	Re: Grid / sortable additionnal column by Thiago H. de Paula Figueiredo :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message On Wed, Jul 1, 2009 at 8:39 AM, Francois Malet<francois_malet@...> wrote: > Hello, Hi! > PropertyModel dModel= beanModel.add("download",null); The problem is here: Grid doesn't know how to get the download property (column) value to sort it, as you passed a null PropertyConduit to the add() method. You need to implement a PropertyConduit for and pass it to the add() method. If Upload implements sortable, you don't need to dModel.sortable(true);. Here's one example for a PropertyConduit related to the manager property (which is of type User) of the Project class: public class ProjectManagerPropertyConduit implements PropertyConduit { public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { return null; } /** * @see org.apache.tapestry5.PropertyConduit#get(java.lang.Object) */ public Object get(Object instance) { Project project = (Project) instance; return project.getManager(); } @SuppressWarnings("unchecked") public Class getPropertyType() { return User.class; } public void set(Object instance, Object value) { Project project = (Project) instance; project.setManager((User) value); } } -- Thiago --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@...
	Re: Grid / sortable additionnal column by Francois Malet :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Perfect! Here is my PropertyConduit implementation public class DownloadPropertyConduit implements PropertyConduit { public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { return null; } /** * @see org.apache.tapestry5.PropertyConduit#get(java.lang.Object) / public Object get(Object instance) { Upload upload = (Upload) instance; return upload.getName(); } @SuppressWarnings("unchecked") public Class getPropertyType() { return String.class; } public void set(Object instance, Object value) { Upload upload = (Upload) instance; upload.setName((String) value); } } --- En date de : Mer 1.7.09, Thiago H. de Paula Figueiredo <thiagohp@...> a écrit : De: Thiago H. de Paula Figueiredo <thiagohp@...> Objet: Re: Grid / sortable additionnal column À: "Tapestry users" <users@...> Date: Mercredi 1 Juillet 2009, 12h46 On Wed, Jul 1, 2009 at 8:39 AM, Francois Malet<francois_malet@...> wrote: > Hello, Hi! > PropertyModel dModel= beanModel.add("download",null); The problem is here: Grid doesn't know how to get the download property (column) value to sort it, as you passed a null PropertyConduit to the add() method. You need to implement a PropertyConduit for and pass it to the add() method. If Upload implements sortable, you don't need to dModel.sortable(true);. Here's one example for a PropertyConduit related to the manager property (which is of type User) of the Project class: public class ProjectManagerPropertyConduit implements PropertyConduit { public <T extends Annotation> T getAnnotation(Class<T> annotationClass) { return null; } /* * @see org.apache.tapestry5.PropertyConduit#get(java.lang.Object) */ public Object get(Object instance) { Project project = (Project) instance; return project.getManager(); } @SuppressWarnings("unchecked") public Class getPropertyType() { return User.class; } public void set(Object instance, Object value) { Project project = (Project) instance; project.setManager((User) value); } } -- Thiago --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscribe@... For additional commands, e-mail: users-help@...