Bug 151381 [Smoke]The parameter didn't display in the web viewer
Description: Preview a parameter in the web viewer, it can't be previewed. Step to reproduce: 1. new a report and a parameter 2. drag it to the layout 3. preview it in the web viewer Actual result: the parameter is not displayed
core/org.eclipse.birt.core/src/org/eclipse/birt/core/data/DataTypeUtil.java
return DataType.INTEGER_TYPE;
		else if ( Double.class.isAssignableFrom( clazz ) )
			return DataType.DOUBLE_TYPE;
		else if ( String.class.isAssignableFrom( clazz ) )
			return DataType.STRING_TYPE;
		else if ( BigDecimal.class.isAssignableFrom( clazz ) )
			return DataType.DECIMAL_TYPE;
		else if ( Date.class.isAssignableFrom( clazz ) )
			return DataType.DATE_TYPE;
		else if ( byte[].class.isAssignableFrom( clazz ) )
			return DataType.BINARY_TYPE;
		else if ( Clob.class.isAssignableFrom( clazz )
				|| clazz.getName( )
						.equals( "org.eclipse.datatools.connectivity.oda.IClob" ) )
			return DataType.STRING_TYPE;
		else if ( Blob.class.isAssignableFrom( clazz )
				|| clazz.getName( )
						.equals( "org.eclipse.datatools.connectivity.oda.IBlob" ) )
			return DataType.BINARY_TYPE;
		
		return DataType.UNKNOWN_TYPE;
	}
	/**
	 * Converts an ODA data type code to its 
	 * corresponding Data Engine API data type constant
	 * defined in DataType.
	 * @param odaDataTypeCode   an ODA data type code
	 * @throws BirtException if the specified ODA data type code
	 *                      is not a supported type
	 */