Bug 153378 [Regression]Label text won't show up when the text key is not found
Steps to reproduce: 1.Add a label, set text to "aaa" 2.Add a resource file "a" to the report, add a text key "k1" which is not in the a.properties to the label 3.Preview in Web Viewer Expected result: Label display "aaa" when the text key is not found Actual result: Nothing in preview
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/util/ParameterValidationUtil.java
{
		if ( value == null )
			return null;
		if ( value instanceof Date )
		{
			DateFormatter formatter = new DateFormatter( DEFAULT_LOCALE );
			formatter.applyPattern( DEFAULT_DATETIME_FORMAT );
			return formatter.format( (Date) value );
		}
		else if ( value instanceof Float || value instanceof Double )
		{
			NumberFormatter formatter = new NumberFormatter( DEFAULT_LOCALE );
			return formatter.format( ( (Number) value ).doubleValue( ) );
		}
		else if ( value instanceof BigDecimal )
		{
			NumberFormatter formatter = new NumberFormatter( DEFAULT_LOCALE );
			return formatter.format( ( (BigDecimal) value ).doubleValue( ) );
		}
		else if ( value instanceof Integer || value instanceof Long )
		{
			NumberFormatter formatter = new NumberFormatter( DEFAULT_LOCALE );
			return formatter.format( ( (Number) value ).longValue( ) );
		}
		else if ( value instanceof Boolean )
		{
			if ( ( (Boolean) value ).booleanValue( ) )
			{
				return getMessage( DEFAULT_LOCALE,
						BooleanPropertyType.BOOLEAN_TRUE_RESOURCE_KEY );