Bug 153514 [Regression]Can't Drill-Through to reportdesign which is in the current path
Description: Can't Drill-Through to reportdesign which is in the current path Step to reproduce: 1. new a report named "target.rptdesign" and add label 2. new another report named "Drillthrough.rptdesign" and also add a label in it 3. Choose the lable in second report and edit its Hyperlink: Drill through target.rptdesign 4. preview it by any form Excepted result: Target.rptdesign can be drill-throughed Actual result: Display "The design file /D:/Eclipses/eclipse200608110630/plugins/org.eclipse.birt.report.viewer_2.1.0.v20060811-0630/birt/documents/4F9E34353BCD20DC7687037D6B8B7A25/Acceptance/Target.rptdesign can not be found. " But if Drill-Through with absolute path is ok.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/ReportDocumentReader.java
return offset.longValue( );
		}
		return -1;
	}
	private void loadReportletStream( )
	{
		reportletsIndexById = new HashMap( );
		reportletsIndexByBookmark = new HashMap( );
		loadReportletStream( reportletsIndexById, REPORTLET_ID_INDEX_STREAM );
		loadReportletStream( reportletsIndexByBookmark,
				REPORTLET_BOOKMARK_INDEX_STREAM );
	}
	private void loadReportletStream( Map index, String streamName )
	{
		RAInputStream in = null;
		try
		{
			in = archive.getStream( streamName );
			DataInputStream di = new DataInputStream( in );
			long count = IOUtil.readLong( di );
			for ( long i = 0; i < count; i++ )
			{
				String key = IOUtil.readString( di );
				long offset = IOUtil.readLong( di );
				index.put( key, new Long( offset ) );
			}
			in.close( );
		}
		catch ( Exception ex )
		{