Package 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

Modifier and Type	Method	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.