### User defined data source

The properties of a user defined data source are:

Property Name | Description
--- | ---
Class Name | Specifies the full name (including package name) of the class represented by the UDS. The class you entered should actually exist and can be found by JReport Designer, which means the class should be in the class path of the system environment. Data type: String
Description | Specifies the description of the UDS. Data type: String
Maximum Duration | Specifies the maximum elapsed time allowed to fetch data from the data source when the UDS runs, measured in seconds. If the value is set to zero or is blank, it means the time will be unlimited. For usage about the property, see Limiting the query run time and number of records. Data type: Integer
Maximum Rows | Specifies the maximum number of rows that will be fetched from the data source when the UDS runs. If the value is set to zero or is blank, it means the number will be unlimited. For usage about the property, see Limiting the query run time and number of records. Data type: Integer
Name | Specifies the name of the UDS. Data type: String
Parameter | Specifies the value of the UDS's parameter. Data type: String
Specify Metadata | Specifies whether or not to apply the column properties specified by users. Data type: Boolean

A UDS contains several columns, the properties of which are shown in the following topic:

- UDS column