org.camunda.bpm.engine.impl.bpmn.helper

Class ClassDelegate

java.lang.Object

org.camunda.bpm.engine.impl.bpmn.behavior.FlowNodeActivityBehavior

org.camunda.bpm.engine.impl.bpmn.behavior.AbstractBpmnActivityBehavior

org.camunda.bpm.engine.impl.bpmn.helper.ClassDelegate

All Implemented Interfaces:

ExecutionListener, TaskListener, ActivityBehavior, SignallableActivityBehavior

public class ClassDelegate
extends AbstractBpmnActivityBehavior
implements TaskListener, ExecutionListener

Helper class for bpmn constructs that allow class delegation. This class will lazily instantiate the referenced classes when needed at runtime.

Author:

Joram Barrez, Falko Menge

Field Summary

Fields

Modifier and Type	Field and Description
protected String	className
protected List<FieldDeclaration>	fieldDeclarations

Fields inherited from class org.camunda.bpm.engine.impl.bpmn.behavior.AbstractBpmnActivityBehavior

multiInstanceActivityBehavior

Fields inherited from class org.camunda.bpm.engine.impl.bpmn.behavior.FlowNodeActivityBehavior

bpmnActivityBehavior

Fields inherited from interface org.camunda.bpm.engine.delegate.TaskListener

EVENTNAME_ASSIGNMENT, EVENTNAME_COMPLETE, EVENTNAME_CREATE, EVENTNAME_DELETE

Fields inherited from interface org.camunda.bpm.engine.delegate.ExecutionListener

EVENTNAME_END, EVENTNAME_START, EVENTNAME_TAKE

Constructor Summary

Constructors

Constructor and Description
ClassDelegate(Class<?> clazz, List<FieldDeclaration> fieldDeclarations)
ClassDelegate(String className, List<FieldDeclaration> fieldDeclarations)

Method Summary

Methods

Modifier and Type	Method and Description
static void	applyFieldDeclaration(FieldDeclaration declaration, Object target)
static void	applyFieldDeclaration(List<FieldDeclaration> fieldDeclarations, Object target)
protected ActivityBehavior	determineBehaviour(ActivityBehavior delegateInstance, ActivityExecution execution)
void	execute(ActivityExecution execution) Default behaviour: just leave the activity with no extra functionality.
static boolean	fieldTypeCompatible(FieldDeclaration declaration, Field field)
protected ActivityBehavior	getActivityBehaviorInstance(ActivityExecution execution)
String	getClassName() returns the class name this ClassDelegate is configured to.
protected ExecutionListener	getExecutionListenerInstance()
protected TaskListener	getTaskListenerInstance()
static Object	instantiateDelegate(Class<?> clazz, List<FieldDeclaration> fieldDeclarations)
static Object	instantiateDelegate(String className, List<FieldDeclaration> fieldDeclarations)
void	notify(DelegateExecution execution)
void	notify(DelegateTask delegateTask)
void	signal(ActivityExecution execution, String signalName, Object signalData)

Methods inherited from class org.camunda.bpm.engine.impl.bpmn.behavior.AbstractBpmnActivityBehavior

createCompensateEventSubscription, getMultiInstanceActivityBehavior, hasCompensationHandler, hasLoopCharacteristics, hasMultiInstanceCharacteristics, leave, setMultiInstanceActivityBehavior, signalCompensationDone

Methods inherited from class org.camunda.bpm.engine.impl.bpmn.behavior.FlowNodeActivityBehavior

leaveIgnoreConditions

Methods inherited from class java.lang.Object

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

Field Detail

className

protected String className

fieldDeclarations

protected List<FieldDeclaration> fieldDeclarations

Constructor Detail

ClassDelegate

public ClassDelegate(String className,
             List<FieldDeclaration> fieldDeclarations)

ClassDelegate

public ClassDelegate(Class<?> clazz,
             List<FieldDeclaration> fieldDeclarations)

Method Detail

notify

public void notify(DelegateExecution execution)
            throws Exception

Specified by:

notify in interface ExecutionListener

Throws:

Exception

getExecutionListenerInstance

protected ExecutionListener getExecutionListenerInstance()

notify

public void notify(DelegateTask delegateTask)

Specified by:

notify in interface TaskListener

getTaskListenerInstance

protected TaskListener getTaskListenerInstance()

execute

public void execute(ActivityExecution execution)
             throws Exception

Description copied from class: FlowNodeActivityBehavior

Default behaviour: just leave the activity with no extra functionality.

Specified by:

execute in interface ActivityBehavior

Overrides:

execute in class FlowNodeActivityBehavior

Throws:

Exception

signal

public void signal(ActivityExecution execution,
          String signalName,
          Object signalData)
            throws Exception

Specified by:

signal in interface SignallableActivityBehavior

Overrides:

signal in class AbstractBpmnActivityBehavior

Throws:

Exception

getActivityBehaviorInstance

protected ActivityBehavior getActivityBehaviorInstance(ActivityExecution execution)

determineBehaviour

protected ActivityBehavior determineBehaviour(ActivityBehavior delegateInstance,
                                  ActivityExecution execution)

instantiateDelegate

public static Object instantiateDelegate(Class<?> clazz,
                         List<FieldDeclaration> fieldDeclarations)

instantiateDelegate

public static Object instantiateDelegate(String className,
                         List<FieldDeclaration> fieldDeclarations)

applyFieldDeclaration

public static void applyFieldDeclaration(List<FieldDeclaration> fieldDeclarations,
                         Object target)

applyFieldDeclaration

public static void applyFieldDeclaration(FieldDeclaration declaration,
                         Object target)

fieldTypeCompatible

public static boolean fieldTypeCompatible(FieldDeclaration declaration,
                          Field field)

getClassName

public String getClassName()

returns the class name this ClassDelegate is configured to. Comes in handy if you want to check which delegates you already have e.g. in a list of listeners