如何以编程方式为BIRT报告设置数据源？ [英] How to set a datasource for a BIRT report programmatically?

问题描述

我有一个连接到我们的测试数据库的BIRT报告。在生产环境中，我想提供一个由容器通过jndi提供的数据源。

I have a BIRT report which connects to our test database. In the productive environment I would like to supply a datasource which is provided by the container through jndi.

如何以编程方式为给定报告设置数据源？

How would I set the datasource programmatically for the given report?

    ...
    IReportRunnable design = birtEngine.openReportDesign ( new File ( properties.getProperty ( "reportPath" ), report + ".rptdesign" ).getAbsolutePath () );
    IRunAndRenderTask task = birtEngine.createRunAndRenderTask ( design );

    PDFRenderOption options = new PDFRenderOption ();
    options.setOutputFormat ( PDFRenderOption.OUTPUT_FORMAT_PDF );
    options.setOutputStream ( out );
    task.setRenderOption ( options );
    for ( Entry<String, Object> entry : parameters.entrySet () )
    {
        task.setParameterValue ( entry.getKey (), entry.getValue () );
    }

    task.run ();
    task.close ();
    ...

我想我必须修改设计但另一方面任务有一个方法 setDataSource 但看起来有点像我将不得不提供一些xml dom元素。

I guess I would have to modify the design but on the other hand task has a method setDataSource but that looks a bit like I would have to supply some xml dom elements.

推荐答案

查看以下代码，您可以在运行时提供数据源方面获得一些帮助。

Look at following code you may get some help in providing data source at runtime.

根据我的要求，它可以正常工作。

For my requirements it works fine.

我从某个网站得到这个不记得。

I got this from some site do not remember.

import java.io.IOException;
import java.util.ArrayList; 

import org.eclipse.birt.core.framework.Platform;
import org.eclipse.birt.report.model.api.CellHandle;
import org.eclipse.birt.report.model.api.DataItemHandle;
import org.eclipse.birt.report.model.api.DesignConfig; 
import org.eclipse.birt.report.model.api.ElementFactory;
import org.eclipse.birt.report.model.api.IDesignEngine;
import org.eclipse.birt.report.model.api.IDesignEngineFactory;
import org.eclipse.birt.report.model.api.LabelHandle;
import org.eclipse.birt.report.model.api.OdaDataSetHandle;
import org.eclipse.birt.report.model.api.OdaDataSourceHandle;
import org.eclipse.birt.report.model.api.PropertyHandle;
import org.eclipse.birt.report.model.api.ReportDesignHandle;
import org.eclipse.birt.report.model.api.RowHandle;
import org.eclipse.birt.report.model.api.SessionHandle;
import org.eclipse.birt.report.model.api.StructureFactory;
import org.eclipse.birt.report.model.api.TableHandle;
import org.eclipse.birt.report.model.api.activity.SemanticException;
import org.eclipse.birt.report.model.api.elements.structures.ComputedColumn;

import com.ibm.icu.util.ULocale;

/**
 * Dynamic Table BIRT Design Engine API (DEAPI) demo.
 */

public class DECreateDynamicTable
{
    ReportDesignHandle designHandle = null;
    ElementFactory designFactory = null;
    StructureFactory structFactory = null;  

    public static void main( String[] args )
    {
        try
        {
            DECreateDynamicTable de = new DECreateDynamicTable();
            ArrayList al = new ArrayList();
            al.add("USERNAME");
            al.add("COUNTRY");
            de.buildReport(al, "From GTM_REPORT_APP_USER" );
        }
        catch ( IOException e )
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        catch ( SemanticException e )
        {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    void buildDataSource( ) throws SemanticException
    {

        OdaDataSourceHandle dsHandle = designFactory.newOdaDataSource(
                "Data Source", "org.eclipse.birt.report.data.oda.jdbc" );
        dsHandle.setProperty( "odaDriverClass",
                "oracle.jdbc.driver.OracleDriver" );
        dsHandle.setProperty( "odaURL", "jdbc:oracle:thin:@xeon:1521:ora9i" );
        dsHandle.setProperty( "odaUser", "AIMS_GTMNE" );
        dsHandle.setProperty( "odaPassword", "AIMS_GTMNE" );

        designHandle.getDataSources( ).add( dsHandle );

    }

    void buildDataSet(ArrayList cols, String fromClause ) throws SemanticException
    {

        OdaDataSetHandle dsHandle = designFactory.newOdaDataSet( "ds",
                "org.eclipse.birt.report.data.oda.jdbc.JdbcSelectDataSet" );
        dsHandle.setDataSource( "Data Source" );
        String qry = "Select ";
        for( int i=0; i < cols.size(); i++){
            qry += " " + cols.get(i);
            if( i != (cols.size() -1) ){
                qry += ",";
            }

        }
        qry += " " + fromClause;

        dsHandle.setQueryText( qry );

        designHandle.getDataSets( ).add( dsHandle );



    }
    void buildReport(ArrayList cols, String fromClause ) throws IOException, SemanticException
    {


        //Configure the Engine and start the Platform
        DesignConfig config = new DesignConfig( );

        config.setProperty("BIRT_HOME", "D:/Softwares/Frame Works - APIs-Tools/birt-runtime-2_6_1/birt-runtime-2_6_1/ReportEngine");

        IDesignEngine engine = null;
        try{


            Platform.startup( config );
            IDesignEngineFactory factory = (IDesignEngineFactory) Platform.createFactoryObject( IDesignEngineFactory.EXTENSION_DESIGN_ENGINE_FACTORY );
            engine = factory.createDesignEngine( config );

        }catch( Exception ex){
            ex.printStackTrace();
        }       


        SessionHandle session = engine.newSessionHandle( ULocale.ENGLISH ) ;



        try{
            //open a design or a template

            designHandle = session.openDesign("D:/tempBirtReport/test.rptdesign");

            designFactory = designHandle.getElementFactory( );

            buildDataSource();
            buildDataSet(cols, fromClause);

            TableHandle table = designFactory.newTableItem( "table", cols.size() );
            table.setWidth( "100%" );
            table.setDataSet( designHandle.findDataSet( "ds" ) );


            PropertyHandle computedSet = table.getColumnBindings( ); 
            ComputedColumn  cs1 = null;

            for( int i=0; i < cols.size(); i++){
                cs1 = StructureFactory.createComputedColumn();
                cs1.setName((String)cols.get(i));
                cs1.setExpression("dataSetRow[\"" + (String)cols.get(i) + "\"]");
                computedSet.addItem(cs1);
            }


            // table header
            RowHandle tableheader = (RowHandle) table.getHeader( ).get( 0 );


            for( int i=0; i < cols.size(); i++){
                LabelHandle label1 = designFactory.newLabel( (String)cols.get(i) ); 
                label1.setText((String)cols.get(i));
                CellHandle cell = (CellHandle) tableheader.getCells( ).get( i );
                cell.getContent( ).add( label1 );
            }                           

            // table detail
            RowHandle tabledetail = (RowHandle) table.getDetail( ).get( 0 );
            for( int i=0; i < cols.size(); i++){
                CellHandle cell = (CellHandle) tabledetail.getCells( ).get( i );
                DataItemHandle data = designFactory.newDataItem( "data_"+(String)cols.get(i) );
                data.setResultSetColumn( (String)cols.get(i));
                cell.getContent( ).add( data );
            }

            designHandle.getBody( ).add( table );

            // Save the design and close it. 

            designHandle.saveAs( "D:/tempBirtReport/test.rptdesign" ); //$NON-NLS-1$
            designHandle.close( );
            System.out.println("Finished");
        }catch (Exception e){
            e.printStackTrace();
        }       

    }
 }

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