Bug 207250 Check blank value for datetime type parameter from url.[0002][0705]
Description: Check blank value for datetime type parameter from url. Build number:2.3.0.v20071023 Steps to reproduce: 1. New a datetime parameter mydt,listbox, tick off isRequired. 2. Preview in external browser and add "&dt=" in url, press enter. Expected result: Error message to indicate blank value isn't allowed for this parameter. Actual result: No error message and blank value is accepted. I tried to new a jsp and use <birt:paramDef> to pass the blank value and the blank value is accepted,too. Error log:n/a
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/DataUtil.java
* @return
	 */
	public static boolean contain( List values, String value, boolean ifDelete )
	{
		if ( values == null )
			return false;
		for ( Iterator it = values.iterator( ); it.hasNext( ); )
		{
			Object obj = it.next( );
			if ( obj == null )
			{
				if ( value == null )
				{
					if ( ifDelete )
						values.remove( obj );
					return true;
				}
				continue;
			}
			if ( obj instanceof String && ( (String) obj ).equals( value ) )
			{
				if ( ifDelete )
					values.remove( obj );
				return true;
			}
		}
		return false;
	}
}