Bug 124610 Add a filter on a boolean computed column will cause error.
Description: Add a filter on a boolean computed column will cause error. Steps to reproduce: 1. New a BIRT sample data source and a dataset from table "orders" 2. Create a computed column with name="yes/no", type = any(no boolean for choose), value= if(row[1]%2==0){ true; }else{ false; } 3. Drag the dataset from Data Explorer to Layout 4. Select the table, click Filters tab in Property Editor. 5. Click Add button. 6. Select yes/no as Expression, Is True as Operator. 7. Save and preview. Expected result: Filter works. Actual result: Error0 : data.engine.ConvertToDataTypeError ( 1 time(s) ) detail : org.eclipse.birt.data.engine.core.DataException: can not be converted to class java.lang.Boolean.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/script/ScriptEvalUtil.java
{
			min = resultOp2;
			max = resultOp1;
		}
		return compare( resultObject, min ) >= 0
				&& compare( resultObject, max ) <= 0;
	}
	
	/**
	 * @param obj
	 * @param bln
	 * @return true if obj equals to bln, false otherwise
	 */
	private static boolean isTrueOrFalse( Object obj, Boolean bln )
	{
		if ( obj == null )
			return false;
		try
		{
			return DataTypeUtil.toBoolean( obj ).equals( bln );
		}
		catch ( BirtException e )
		{
			return false;
		}
	}
	
	private static Pattern s_JSReExprPattern;