org.apache.torque.generator.outlet.java

## Class OutletUtils

- java.lang.Object
- - org.apache.torque.generator.outlet.java.OutletUtils

-     public final class OutletUtils
      extends Object

  Utility methods to retrieve information out of the source model or the configuration. The methods provide adequate logging and error handling.

- - ### Method Summary

    All Methods Static Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `static String` | `getFromDifferentPlaces(String presetValue, String optionName, String variableName, String sourceElementName, String sourceElementAttribute, ControllerState controllerState, Class<?> clazz, String expectedFieldNames)` Retrieve a value from either a preset value, an option, a variable, or a source element attribute.
    `static String` | `getOption(String optionName, ControllerState controllerState, Class<?> clazz)` Reads an option with a given name.
    `static String` | `getSourceElementAttribute(String elementName, String attributeName, ControllerState controllerState, Class<?> clazz)` Retrieves the value of a source element attribute.

    - ### Methods inherited from class java.lang.Object

      `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- - ### Method Detail

    - #### getSourceElementAttribute

          public static String getSourceElementAttribute(String elementName,
                                                         String attributeName,
                                                         ControllerState controllerState,
                                                         Class<?> clazz)
                                                  throws GeneratorException

      Retrieves the value of a source element attribute. The source element must be found and the attribute must be set, otherwise an exception is thrown.
      Parameters:
        `elementName` - The name of the source element relative to the current source element; a dot (.) denotes the current element.
        `attributeName` - The name of the attribute of the element.
        `controllerState` - The controller state.
        `clazz` - the class in which the attribute should be retrieved; used only for logging.
      Returns:
        the value of the specified attribute, not null.
      Throws:
        `GeneratorException` - if the source element cannot be found or the specified attribute is not set.

    - #### getOption

          public static String getOption(String optionName,
                                         ControllerState controllerState,
                                         Class<?> clazz)
                                  throws GeneratorException

      Reads an option with a given name. The option must be set to a value different from null.
      Parameters:
        `optionName` - the name of the option to read, not null.
        `controllerState` - the current state of the controller, not null.
        `clazz` - the class from which this method is called, not null. Only used for logging purposes.
      Returns:
        the value of the option.
      Throws:
        `GeneratorException` - if the option is not set or set to null.

    - #### getFromDifferentPlaces

          public static String getFromDifferentPlaces(String presetValue,
                                                      String optionName,
                                                      String variableName,
                                                      String sourceElementName,
                                                      String sourceElementAttribute,
                                                      ControllerState controllerState,
                                                      Class<?> clazz,
                                                      String expectedFieldNames)
                                               throws GeneratorException

      Retrieve a value from either a preset value, an option, a variable, or a source element attribute. Exactly one of these must be set to a value different from zero.
      Parameters:
        `presetValue` - the plain result, or null if the preset value should not be used.
        `optionName` - the name of the option to access, or null if no option value should be returned.
        `variableName` - the name of the variable to access, or null if no variable should be accessed.
        `sourceElementName` - the name of the source element relative to the current element which attribute should be read. Null if no source attribute value should be used.
        `sourceElementAttribute` - the name of the attribute of the above source element.
        `controllerState` - the current state of the controller, not null.
        `clazz` - the class from which this method is called, not null. Used only for logging purposes.
        `expectedFieldNames` - the field names in which the information is expected; for logging purposes only.
      Returns:
        the desired value, not null.
      Throws:
        `GeneratorException` - if the value is not set or more than one possibility to get the value exists.

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