thanks juergen
--- Juergen Saar <[EMAIL PROTECTED]> wrote:
> Here a simple JRDataSource template:
>
> /*
> * Created on 12.05.2006
> */
> package org.jsaar.report;
>
> import java.util.Iterator;
> import java.util.List;
>
> import org.apache.commons.jxpath.JXPathContext;
> import org.objectstyle.cayenne.DataObject;
>
> import net.sf.jasperreports.engine.JRDataSource;
> import net.sf.jasperreports.engine.JRException;
> import net.sf.jasperreports.engine.JRField;
>
> public class JsDataSource extends Object implements JRDataSource {
> private List data = null;
> private Iterator iterator = null;
> private DataObject dataObject = null;
>
> /**
> * Constructor with List usually from SelectQuery
> *
> * @param businessObjects
> */
> public JsDataSource(List businessObjects) {
> super();
> setData(businessObjects);
> }
>
> /**
> * setter for List
> *
> * @param list
> */
> public void setData(List list) {
> data = list;
> iterator = data.iterator();
> }
>
> /* (non-Javadoc)
> * @see net.sf.jasperreports.engine.JRDataSource#getFieldValue(
> net.sf.jasperreports.engine.JRField)
> */
> public Object getFieldValue(JRField field) throws JRException {
> String name = field.getName();
> JXPathContext context = JXPathContext.newContext(dataObject);
> Object obj = context.getValue(name);
> return (obj == null) ? null : obj.toString();
> }
>
> /* (non-Javadoc)
> * @see net.sf.jasperreports.engine.JRDataSource#next()
> */
> public boolean next() throws JRException {
> boolean result = iterator.hasNext();
> if (result) {
> dataObject = (DataObject) iterator.next();
> }
> return result;
> }
>
> }
>
>
> 2006/5/12, Alan Baltazar <[EMAIL PROTECTED]>:
> >
> >
> > DataRows seem to be the only solution i could think of to wrap the
> > JRDataSource
> > implementation, which is required by jasperreports to read the datasource
> > data.
> > JRDataSource is a wrapper hashmap for reading the rows from a datasource.
> > i don't know
> > much about dataobjects to implement this .... if you do, please let me
> > know how.
> >
> > --- Juergen Saar <[EMAIL PROTECTED]> wrote:
> >
> > > Why do you work on DataRows ... DataObjects are much more like
> > > BusinessObjects.
> > >
> > > If you work on DataObjects and there are some getters for
> > > transient informations coming from business-logic
> > > it can help a lot.
> > >
> > > Just one more hint:
> > > reading content of DataObjects with jxpath is really cool.
> > >
> >
>
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