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
.equalsIgnoreCase( dataType ) )
				return doValidateDateTimeByPattern( format, value, locale );
			else if ( DesignChoiceConstants.PARAM_TYPE_FLOAT
					.equalsIgnoreCase( dataType ) )
			{
				Number number = doValidateNumberByPattern( dataType, format,
						value, locale );
				if ( number == null )
					return null;
				return new Double( number.doubleValue( ) );
			}
			else if ( DesignChoiceConstants.PARAM_TYPE_DECIMAL
					.equalsIgnoreCase( dataType ) )
			{
				Number number = doValidateNumberByPattern( dataType, format,
						value, locale );
				if ( number == null )
					return null;
				return new BigDecimal( number.doubleValue( ) );
			}
			else if ( DesignChoiceConstants.PARAM_TYPE_INTEGER
					.equalsIgnoreCase( dataType ) )
			{
				Number number = doValidateNumberByPattern( dataType, format,
						value, locale );
				if ( number == null )
					return null;
				return new Integer( number.intValue( ) );
			}
			else if ( DesignChoiceConstants.PARAM_TYPE_STRING