testcharttitleformatrecord.java

介绍java核心技术的pio编程方法以及基本概念

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package org.apache.poi.hssf.record;

import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.util.ArrayList;

import org.apache.poi.hssf.eventusermodel.HSSFEventFactory;
import org.apache.poi.hssf.eventusermodel.HSSFListener;
import org.apache.poi.hssf.eventusermodel.HSSFRequest;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;

import junit.framework.TestCase;

public class TestChartTitleFormatRecord extends TestCase
{
    private String _test_file_path;
    private static final String _test_file_path_property = "HSSF.testdata.path";

    public TestChartTitleFormatRecord()
    {
        super();
        _test_file_path = System.getProperty( _test_file_path_property ) +
        	File.separator + "WithFormattedGraphTitle.xls";
    }

    public void testRecord() throws Exception {
    	POIFSFileSystem fs = new POIFSFileSystem(
    			new FileInputStream(_test_file_path)
    	);
    	
    	// Check we can open the file via usermodel
    	HSSFWorkbook hssf = new HSSFWorkbook(fs);
    	
    	// Now process it through eventusermodel, and
    	//  look out for the title records
    	ChartTitleFormatRecordGrabber grabber =
    		new ChartTitleFormatRecordGrabber();
    	InputStream din = fs.createDocumentInputStream("Workbook");
        HSSFRequest req = new HSSFRequest();
        req.addListenerForAllRecords(grabber);
        HSSFEventFactory factory = new HSSFEventFactory();
        factory.processEvents(req, din);
        din.close();
        
        // Should've found one
        assertEquals(1, grabber.chartTitleFormatRecords.size());
        // And it should be of something interesting
        ChartTitleFormatRecord r =
        	(ChartTitleFormatRecord)grabber.chartTitleFormatRecords.get(0);
        assertEquals(3, r.getFormatCount());
    }
    
    public static class ChartTitleFormatRecordGrabber implements HSSFListener {
    	private ArrayList chartTitleFormatRecords = new ArrayList();

		public void processRecord(Record record) {
			if(record instanceof ChartTitleFormatRecord) {
				chartTitleFormatRecords.add(
						record
				);
			}
		}
    	
    }
}