Bug 140705 Insert group does not work properly when cache preference is set
When cache preference is set, insert group does not work properly. Steps to reproduce problem: In Birt report designer: New a report design, data source, data set; Insert a table, drag several columns into table; Set cache preference for data set: check checkbox "Cache dataset data for report view"; Select "Cache and use first [] rows"; Enter '100' as row count. PREVIEW report; Insert group, Preview report again ---> problem happens: only header line will show up. All details are missing. Sample report is also attached.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/executor/DataSourceAndDataSet.java
if ( this.cacheCount != cacheCount2 )
			return false;
		return true;
	}
	/**
	 * Only for non-collection object
	 * 
	 * @param ob1
	 * @param ob2
	 * @return
	 */
	private boolean isEqualObject( Object ob1, Object ob2 )
	{
		if ( ob1 == ob2 )
			return true;
		else if ( ob1 == null || ob2 == null )
			return false;
		return ob1.equals( ob2 );
	}
	/**
	 * @param str1
	 * @param str2
	 * @return
	 */
	private boolean isEqualString( String str1, String str2 )
	{
		return isEqualObject( str1, str2 );
	}
	/**
	 * @param map1