install4j API

com.install4j.api.formcomponents
Class AbstractFormComponent

java.lang.Object
  extended by com.install4j.api.beans.AbstractBean
      extended by com.install4j.api.formcomponents.AbstractFormComponent
All Implemented Interfaces:
Bean, FormComponent

public abstract class AbstractFormComponent
extends AbstractBean
implements FormComponent

Abstract base class for form components. All methods that have a reasonable default answer are overridden in the class. This class saves the context and the form environment that are set by the framework and provides getters for them. In addition the "enabled" and "visible" properties are handled by invoking the corsponding setters on all components in the ComponentTuple of the form component.

Author:
ej-technologies GmbH

Constructor Summary
AbstractFormComponent()
           
 
Method Summary
 boolean checkCompleted()
          This method is called by the framework when the user advances to the next screen in GUI or console mode.
 javax.swing.JComponent createLeftComponent()
          Create the leading component to the left of the center component.
 javax.swing.JComponent createRightComponent()
          Create the trailing component to the right of the center component.
 void formActivated()
          This method is called by the framework just after the containing screen has been activated.
 void formDeactivated()
          This method is called by the framework just after the containing screen has been deactivated.
 void formWillActivate()
          This method is called by the framework just before the containing screen will be activated.
 java.lang.Object getConfigurationObject()
          If the getConfigurationObjectClass method returns null, this method is not called, otherwise a non-null value of the type returned by getConfigurationObjectClass has to be returned by this method.
 java.lang.Class getConfigurationObjectClass()
          A form component can expose a well-known configuration object that is passed as a parameter to the "Initialization script" property of every form component.
 Context getContext()
          Returns the Context that the framework has associated with this form component in setContext.
 FormEnvironment getFormEnvironment()
          Returns the FormEnvironment that the framework has associated with this form component in setFormEnvironment.
protected  java.lang.Object getInitValue(java.lang.Object defaultValue, java.lang.String variableName, java.lang.Class valueClass)
          Helper method to get an init value.
 boolean handleConsole(Console console)
          Handle the console mode.
 boolean handleUnattended()
          Handle the unattended mode.
 void initalize()
          This method is called by the framework when the initial state of the component should be evaluated.
 boolean isEnabled()
          Returns whether the form component is enabled or not.
 boolean isVisible()
          Returns whether the form component is visible or not.
 void migrateIds(java.util.Map oldItToNewId)
          This method is only called at design time when a user pastes form components or a screen with form components from the clipboard.
 void setContext(Context context)
          This method is called by the framework to set the Context just after the form component has been constructed.
 void setEnabled(boolean enabled)
          Sets whether the form component is enabled or not.
 void setFormEnvironment(FormEnvironment formEnvironment)
          At runtime, this method is called twice by the framework.
 void setVisible(boolean visible)
          Sets whether the form component is visible or not.
 
Methods inherited from class com.install4j.api.beans.AbstractBean
replaceVariables, replaceVariables, replaceVariables, replaceVariables
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface com.install4j.api.formcomponents.FormComponent
createCenterComponent, isFillCenterHorizontal
 

Constructor Detail

AbstractFormComponent

public AbstractFormComponent()
Method Detail

setContext

public void setContext(Context context)
Description copied from interface: FormComponent
This method is called by the framework to set the Context just after the form component has been constructed. This is either an InstallerContext or an UninstallerContext, depending on the whether the form screen is part of an installer or uninstaller.

Specified by:
setContext in interface FormComponent
Parameters:
context - the context.

getContext

public Context getContext()
Returns the Context that the framework has associated with this form component in setContext.

Returns:
the installer context.

setFormEnvironment

public void setFormEnvironment(FormEnvironment formEnvironment)
Description copied from interface: FormComponent
At runtime, this method is called twice by the framework. Once, to set the FormEnvironment just after the screen has been constructed. The getFormComponents() method will return an empty array for that instance. Second, after all form components have been instantiated, a new FormEnvironment is set whose getFormComponents() method returns all form components in the form.

At design time, this method is called repeatedly and the result of a call to getFormComponents() may be different over time.

Specified by:
setFormEnvironment in interface FormComponent
Parameters:
formEnvironment - the FormEnvironment
See Also:
FormEnvironment.getFormComponents()

getFormEnvironment

public FormEnvironment getFormEnvironment()
Returns the FormEnvironment that the framework has associated with this form component in setFormEnvironment.

Returns:
the installer context.

isEnabled

public boolean isEnabled()
Description copied from interface: FormComponent
Returns whether the form component is enabled or not. This must reflect the value set with setEnabled.

AbstractFormComponent provides a default implementation for both isEnabled and setEnabled.

Specified by:
isEnabled in interface FormComponent
Returns:
true or false.
See Also:
FormComponent.setEnabled(boolean)

setEnabled

public void setEnabled(boolean enabled)
Description copied from interface: FormComponent
Sets whether the form component is enabled or not. This method is primarily intended for use in the "Initialization script" property in the install4j GUI.

It can also be used for the case where another form component wants to control the state of this form component. For example the "Check box" form component holds a list of coupled form components that are enabled and disabled with calls to this method.

AbstractFormComponent provides a default implementation that calls setEnabled on all components in the ComponentTuple, saves the "enabled" flag and returns it in the isEnabled method.

Specified by:
setEnabled in interface FormComponent
Parameters:
enabled - whether to enable this form component or not
See Also:
AbstractFormComponent, ComponentTuple, FormComponent.isEnabled()

setVisible

public void setVisible(boolean visible)
Description copied from interface: FormComponent
Sets whether the form component is visible or not. This method is primarily intended "Initialization script" property in the install4j GUI.

It can also be used for the case where another form component wants to control the state of this form component.

AbstractFormComponent provides a default implementation that calls setVisible on all components in the ComponentTuple, saves the "visible" flag and returns it in the isVisible method.

Specified by:
setVisible in interface FormComponent
Parameters:
visible - whether this form component should be visible or not
See Also:
AbstractFormComponent, ComponentTuple, FormComponent.isVisible()

isVisible

public boolean isVisible()
Description copied from interface: FormComponent
Returns whether the form component is visible or not. This must reflect the value set with setVisible.

AbstractFormComponent provides a default implementation for both isVisible and setVisible.

Specified by:
isVisible in interface FormComponent
Returns:
true or false.
See Also:
FormComponent.setVisible(boolean)

migrateIds

public void migrateIds(java.util.Map oldItToNewId)
Description copied from interface: FormComponent
This method is only called at design time when a user pastes form components or a screen with form components from the clipboard. When form components are pasted, their IDs as returned by FormEnvironment.getId change. Form components that keep a list of IDs of other form components should migrate those IDs in this method.

Specified by:
migrateIds in interface FormComponent
Parameters:
oldItToNewId - a map that maps the old IDs to the new IDs. An ID is of type java.lang.String.
See Also:
FormEnvironment.getId(FormComponent), FormEnvironment.getFormComponentById(String)

createLeftComponent

public javax.swing.JComponent createLeftComponent()
Description copied from interface: FormComponent
Create the leading component to the left of the center component. This component will not grow beyond its preferred horizontal size.

In console or unattended mode, this method is never called.

Specified by:
createLeftComponent in interface FormComponent
Returns:
the leading component or null if no leading component should be created.

createRightComponent

public javax.swing.JComponent createRightComponent()
Description copied from interface: FormComponent
Create the trailing component to the right of the center component. This component will not grow beyond its preferred horizontal size.

In console or unattended mode, this method is never called.

Specified by:
createRightComponent in interface FormComponent
Returns:
the trailing component or null if no trailing component should be created.

getConfigurationObject

public java.lang.Object getConfigurationObject()
Description copied from interface: FormComponent
If the getConfigurationObjectClass method returns null, this method is not called, otherwise a non-null value of the type returned by getConfigurationObjectClass has to be returned by this method.

In console or unattended mode, this method is never called.

Specified by:
getConfigurationObject in interface FormComponent
Returns:
the configuration object or null if getConfigurationObjectClass returns null as well.
See Also:
FormComponent.getConfigurationObjectClass()

getConfigurationObjectClass

public java.lang.Class getConfigurationObjectClass()
Description copied from interface: FormComponent
A form component can expose a well-known configuration object that is passed as a parameter to the "Initialization script" property of every form component. Typically, you expose the main component contained in this form component, such as a JCheckBox or a JTextField. If you return a non-null value in the method, the getConfigurationObject method must return an object of that class.

In console or unattended mode, this method is never called.

Specified by:
getConfigurationObjectClass in interface FormComponent
Returns:
the class of the configuration object or null if no configuration object should be exposed.
See Also:
FormComponent.getConfigurationObject()

checkCompleted

public boolean checkCompleted()
Description copied from interface: FormComponent
This method is called by the framework when the user advances to the next screen in GUI or console mode. If your form component expects user-input, this is the place to save it to an installer variable. You can veto the screen change by returning false in this method.

Specified by:
checkCompleted in interface FormComponent
Returns:
whether to allow advancing to the next screen or not.
See Also:
Context.setVariable(String, Object)

initalize

public void initalize()
Description copied from interface: FormComponent
This method is called by the framework when the initial state of the component should be evaluated. This happens when the user first enters the screen that contains the form component. Whether repeated entries to this screen will cause this method to be called depends on the value of the "Reset initialization on previous" property that can be configured in the install4j GUI.

Initialization often involves replacing variables in user-configured property values.

Specified by:
initalize in interface FormComponent
See Also:
AbstractBean.replaceVariables(String)

formWillActivate

public void formWillActivate()
Description copied from interface: FormComponent
This method is called by the framework just before the containing screen will be activated.

Specified by:
formWillActivate in interface FormComponent
See Also:
Screen.willActivate()

formActivated

public void formActivated()
Description copied from interface: FormComponent
This method is called by the framework just after the containing screen has been activated.

Specified by:
formActivated in interface FormComponent
See Also:
Screen.activated()

formDeactivated

public void formDeactivated()
Description copied from interface: FormComponent
This method is called by the framework just after the containing screen has been deactivated.

Specified by:
formDeactivated in interface FormComponent
See Also:
Screen.deactivated()

handleConsole

public boolean handleConsole(Console console)
                      throws UserCanceledException
Description copied from interface: FormComponent
Handle the console mode. This method is called when the form component is processed in console mode. You can use the Console object to interact with the user and replicate the GUI functionality on the terminal.

Note: Screens with form panels have to call FormEnvironment.handleConsole in their handleConsole method, otherwise this method will not be invoked. All pre-defined screens in install4j comply with this requirement.

Specified by:
handleConsole in interface FormComponent
Parameters:
console - the Console object
Returns:
whether the installer or uninstaller can proceed with the next form component or whether the process should be cancelled.
Throws:
UserCanceledException - if the user cancels a question or notice. These exceptions are thrown by methods in the Console object.
See Also:
Screen.handleConsole(com.install4j.api.screens.Console), FormEnvironment.handleConsole(com.install4j.api.screens.Console)

handleUnattended

public boolean handleUnattended()
Description copied from interface: FormComponent
Handle the unattended mode. This method is called when the form component is processed in unattended mode. There is no way to interact with the user. This method might be necessary to mirror some behavior from the GUI mode, such as setting an installer variable.

Specified by:
handleUnattended in interface FormComponent
Returns:
whether the installer or uninstaller can proceed with the next form component or whether the process should be cancelled.

getInitValue

protected java.lang.Object getInitValue(java.lang.Object defaultValue,
                                        java.lang.String variableName,
                                        java.lang.Class valueClass)
Helper method to get an init value. If the variable is defined and of class valueClass, the variable value is used. Otherwise the default value is used.

Parameters:
defaultValue - the default value. Can be null.
variableName - the installer variable name the value will be assigned to later on
valueClass - the desired class of the variable content
Returns:
the init value to be used

install4j API