[jboss-user] [JBoss Seam] - Re: Here is a Richfaces Ajax Datascroler and Seam Example
Here is a more recent version of the code. This time I have the query return a
List of maps for an HQL query.
I just override get id and it works. Try this more recent version. Are you
using Seam 2.0.x?
I have not seen too much interest in my method. If people like the technique
employed, I can post an example when I get some time.
|
| import java.io.IOException;
| import java.io.Serializable;
| import java.util.ArrayList;
| import java.util.HashMap;
| import java.util.List;
| import java.util.Map;
|
| import javax.faces.context.FacesContext;
|
| import org.ajax4jsf.model.DataVisitor;
| import org.ajax4jsf.model.ExtendedDataModel;
| import org.ajax4jsf.model.Range;
| import org.ajax4jsf.model.SequenceRange;
| import org.jboss.seam.annotations.Logger;
| import org.jboss.seam.log.Log;
|
| import com.xxx.ui.Idable;
|
| public abstract class BaseExtendedDataModel
extends ExtendedDataModel implements BaseExtendedDataModelDAO{
|
| private @Logger Log log;
|
| int rowNum=-1;
|
| public int getRowNum()
| {
| return ++rowNum;
| }
|
| public List listRow;
|
| private ID currentId;
| private Map wrappedData = new HashMap();
| private List wrappedKeys;
| private Long rowCount; // better to buffer row count locally
|
| public abstract Long getCount();
| public abstract List getList(Integer firstRow, Integer maxResults);
| public abstract T findById(ID id);
|
| public ID getId(T row)
| {
| Idable idable = (Idable) row;
| ID id = (ID) idable.getId();
| return id;
| }
|
| public void wrap(FacesContext context, DataVisitor visitor, Range
range, Object argument, List list) throws IOException
| {
| wrappedKeys = new ArrayList();
| wrappedData = new HashMap();
| for (T row : list)
| {
| ID id = getId(row);
| wrappedKeys.add(id);
| wrappedData.put(id, row);
| visitor.process(context, id, argument);
| }
| }
|
| public boolean hasById(ID id)
| {
| for (T row : listRow)
| {
| ID rowId = getId(row);
| if (rowId.equals(id))
| {
| return true;
| }
| }
| return false;
| }
|
| @Override
| public void walk(FacesContext context, DataVisitor visitor, Range
range, Object argument) throws IOException
| {
| int firstRow = ((SequenceRange) range).getFirstRow();
| int maxResults = ((SequenceRange) range).getRows();
| log.info("("+firstRow +", "+ maxResults+")");
| wrap(context, visitor, range, argument, getList(firstRow,
maxResults));
| }
|
| /*
| * This method normally called by Visitor before request Data Row.
| */
| @Override
| public void setRowKey(Object key)
| {
| this.currentId = (ID) key;
| }
|
| @Override
| public int getRowCount()
| {
| if(rowCount == null)
| return (rowCount = this.getCount()).intValue();
| else
| return rowCount.intValue();
| }
|
| @Override
| public boolean isRowAvailable()
| {
| if (currentId == null) {
| return false;
| } else {
| return hasById(currentId);
| }
| }
|
| /**
| * This is main way to obtain data row. It is intensively used by
framework.
| * We strongly recommend use of local cache in that method.
| */
| @Override
| public Object getRowData() {
| if (currentId == null) {
| return null;
| } else {
| T ret = wrappedData.get(currentId);
| if (ret == null) {
| ret = this.findById(currentId);
| wrappedData.put(currentId, ret);
| return ret;
| } else {
| return ret;
| }
| }
| }
|
|
| // Unused rudiment from old JSF staff.
| @Override public int getRowIndex() { throw new
UnsupportedOperationException(); }
| @Override public void setRowIndex(int rowIndex) { throw new
UnsupportedOperationException(); }
| @Override public Object getWrappedData() { throw new
UnsupportedOperationException(); }
| @Override public void setWrappedData(Objec
[jboss-user] [JBoss Seam] - Re: Here is a Richfaces Ajax Datascroler and Seam Example
I tried to run your code but i am getting NotSupportedException because setRowIndex is called. Is that expected?. Any idea? Thanks, V. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4125583#4125583 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4125583 ___ jboss-user mailing list jboss-user@lists.jboss.org https://lists.jboss.org/mailman/listinfo/jboss-user
[jboss-user] [JBoss Seam] - Re: Here is a Richfaces Ajax Datascroler and Seam Example
@supernovasoftware.com Thanks for offering your help :-) As far as I understand the code, I would need a separate seam component (representing the DataModel and extending BaseExtendedDataModel) for each query of which result I want to page through the results. I will give it a try if I have time and keep you updated. Regards, Alexander View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4115899#4115899 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4115899 ___ jboss-user mailing list jboss-user@lists.jboss.org https://lists.jboss.org/mailman/listinfo/jboss-user
[jboss-user] [JBoss Seam] - Re: Here is a Richfaces Ajax Datascroler and Seam Example
Yes. You should be able to just override the methods with your custom queries. Please let me know how it goes as I want to improve on this, but do not have the time currently to spend. If you have problems I will try to help. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4113454#4113454 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4113454 ___ jboss-user mailing list jboss-user@lists.jboss.org https://lists.jboss.org/mailman/listinfo/jboss-user
[jboss-user] [JBoss Seam] - Re: Here is a Richfaces Ajax Datascroler and Seam Example
Hi, thanks you for the code.. lazy loading with Richfaces datatable is really helpul for me. But I am not using DAO's to access my Entities. I am using the normal EntityManager.createQuery(..) method. I would have to make 2 queries one for getCount and one for getList (and a third for getId), correct? Regards, Alexander View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4113176#4113176 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4113176 ___ jboss-user mailing list jboss-user@lists.jboss.org https://lists.jboss.org/mailman/listinfo/jboss-user
[jboss-user] [JBoss Seam] - Re: Here is a Richfaces Ajax Datascroler and Seam Example
If your object does not implement Idable you can override the methods shown below. These are the only methods that depend on this. I will need to do this in some cases where I am returning a list of maps instead a list of entities. | public void wrap(FacesContext context, DataVisitor visitor, Range range, Object argument, List list) throws IOException; | public boolean hasById(ID id); | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4113005#4113005 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4113005 ___ jboss-user mailing list jboss-user@lists.jboss.org https://lists.jboss.org/mailman/listinfo/jboss-user
