biz.webgate.dominoext.poi.component.kernel.csv.EmbeddedDataSourceExportProcessor.java Source code

Introduction

Here is the source code for biz.webgate.dominoext.poi.component.kernel.csv.EmbeddedDataSourceExportProcessor.java

Source

/*
 *  Copyright WebGate Consulting AG, 2013
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at:
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 
 * implied. See the License for the specific language governing 
 * permissions and limitations under the License.
 */
package biz.webgate.dominoext.poi.component.kernel.csv;

import java.util.List;

import javax.faces.context.FacesContext;

import org.apache.commons.csv.CSVPrinter;

import biz.webgate.dominoext.poi.utils.exceptions.POIException;
import biz.webgate.dominoext.poi.component.containers.UICSV;
import biz.webgate.dominoext.poi.component.data.csv.CSVColumn;
import biz.webgate.dominoext.poi.component.sources.IExportSource;

public class EmbeddedDataSourceExportProcessor implements IDataSourceProcessor {

    private static EmbeddedDataSourceExportProcessor m_Processor;

    private EmbeddedDataSourceExportProcessor() {

    }

    public static EmbeddedDataSourceExportProcessor getInstance() {
        if (m_Processor == null) {
            m_Processor = new EmbeddedDataSourceExportProcessor();
        }
        return m_Processor;
    }

    public void process(List<CSVColumn> lstColumns, UICSV csvDef, CSVPrinter csvPrinter, FacesContext context)
            throws POIException {
        try {
            IExportSource is = csvDef.getDataSource();
            int nAccess = is.accessSource();
            if (nAccess < 1) {
                throw new POIException("Error accessing Source: " + is.getClass() + " Error: " + nAccess);
            }
            int nCount = 0;
            while (is.accessNextRow() == 1) {
                nCount++;
                for (CSVColumn cl : lstColumns) {
                    Object objCurrent = is.getValue(cl, csvDef.getVar(), csvDef.getIndex(), nCount, context);
                    csvPrinter.print(objCurrent);
                }
                csvPrinter.println();
            }
            is.closeSource();
        } catch (Exception e) {
            throw new POIException("Error in processExportRow", e);
        }

    }

}