root / branches / v2_0_0_prep / frameworks / _fwAndami / src / org / gvsig / andami / actioninfo / ActionInfo.java @ 38621
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package org.gvsig.andami.actioninfo; |
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import java.awt.event.ActionListener; |
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import java.util.Collection; |
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import javax.swing.Action; |
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import javax.swing.ImageIcon; |
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import javax.swing.KeyStroke; |
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import org.gvsig.andami.PluginServices; |
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import org.gvsig.andami.plugins.IExtension; |
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/**
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* Esta entidad representa a una accion dentro de gvSIG, que podra ser usada
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* por menus, botones de la toolbar, menus contextuales, o desde cualquier
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* otro elemento de gvSIG que precise invocar a una accion.
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*
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* La accion esta compuesta por una definicion de cual es su etiqueta, su
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* icono, teclas aceleradoras, su tip, o su posicion respecto a otras acciones,
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* junto con una extension (IExtension) que aporta el codigo de la accion.
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*
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* Una accion responde principalmente a cuatro operaciones:
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*
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* - isActive, que nos indica si la accion esta activa, es decir, si
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* debera presentarse al usuario o no. Si una extension no esta activa,
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* los metodos isVisible y isEnabled retornaran siempre false, sin invocar
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* al codigo de la extension asociada a la accion.
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*
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* - isVisible, que nos indica si la accion debera presentarse o no en el
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* interface de usuario. De forma general podemos asumir que cuando se
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* invoque a este metodo se delegara en el metodo isVisible de la extension
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* asociada a la accion.
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*
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* - isEnabled, que nos indica si la accion debera estar habilitada o no en
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* el interface de usuario. De forma general podemos asumir que cuando se
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* invoque a este metodo se delegara en el metodo isEnabled de la extension
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* asociada a la accion.
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*
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* - execute, que provocara que se ejecute el codigo asociado a la accion.
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* De forma general podemos asumir que cuando se invoque a estos metodo se
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* delegara en el metodo execute de la extension asociada a esta accion, pasandole
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* el "command" de la accion como parametro.
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*
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* Ademas de la definicion de la accion, esta tambien puede disponer de una coleccion
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* de acciones hacia las que puede ser redirigida. Esto es, en un momento dado
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* nos puede interesar que cuando sea invocada la accion "A", en lugar de ejecutarse
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* las operaciones de esta, se ejecuten las operaciones de otra accion "B". Esto nos
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* permite atrapar la ejecucion de una accion independientemente de desde donde se este
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* invocando. Cuando una accion tenga asignadas otras acciones a las que redirigir
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* su ejecucion, solo se redigira a una de ellas, la primera en la coleccion de acciones a
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* redirigir que responda "true" a su metodo isEnabled, y en caso de que no responda true
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* ninguna se ejecutara el codigo de la accion original. El orden de la coleccion de
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* acciones a las que redirigir de una accion sera el orden inverso en el que se han
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* ido registrandose las redirecciones. Asi primero se intentara con la ultima redireccion
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* asignada, luego con la anterior, y asi sucesivamente se recorreran todas las redireccion
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* hasta que una responda "true" a su isEnabled, ejecutandose entonces el codigo de esta.
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*
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*
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* @author jjdelcerro
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*
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*/
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public interface ActionInfo extends Action, ActionListener{ |
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/**
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* returns the plugin of the extension asociated to the action.
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*
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* @return pluginServices asiciated to the action.
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*/
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public PluginServices getPlugin();
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/**
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* returns the extension asociated to the action. The action
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* delegates the methods isEnabled, isVisible and execute in this
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* extension when these are invoked.
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*
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* @return IExtension asociated to the action
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*/
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public IExtension getExtension();
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/**
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* Return the plugin name of the plugin asociated to the action.
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* This is a utility method checkins null values. is equivalent to:
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*
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* action.getPlugin().getPluginName()
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*
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*
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* @return plugin name
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* @see #getPlugin()
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*/
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public String getPluginName(); |
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/**
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* Returns the extension name of the extension asociated to this action.
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* This a utility method that check null values. Is equivalent to:
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*
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* action.getExtension().getClass().getName()
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*
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* @return extension name.
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* @see #getExtension()
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*/
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public String getExtensionName(); |
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/**
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* Returns the name of the action. This name is usaed to retrieve the
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* action thwros the manager.
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*
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* @return action name
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*/
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public String getName(); |
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/**
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* Return a label asociated to the action. This label can be used
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* in buttons, o menus.
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*
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* @return label of action
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*/
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public String getLabel(); |
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/**
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* Returns the command used for invoking the execute method of
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* the extension asociated to this action.
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*
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* @return command of action
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*/
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public String getCommand(); |
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/**
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* Return an icon asociated to the action. This icon can be used
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* in buttons, o menus.
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*
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* @return ImageIcon asociated tho the action
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*/
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public ImageIcon getIcon(); |
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/**
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* Returns the name of icon asociated to the action. This name is
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* used to retrive the icon from the current icon theme of the application.
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*
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* @return icon name.
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*/
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public String getIconName(); |
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/**
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* returns a representation human readable of the accelerator to be used
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* associated to the action.
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*
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* @return String representing the accelerator
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*/
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public String getAccelerator(); |
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/**
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* returns the KeyStroke which represents the accelerator of this
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* action.
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*
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* @return keystroke asociated to this action
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* @see #getAccelerator()
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*/
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public KeyStroke getKeyStroke(); |
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/**
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* Return a string that represents a tip asociated whit the action,
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* usually used as tooltip in buttons or menus.
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*
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* @return the tip of the action
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*/
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public String getTooltip(); |
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/**
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* Return the position absolute of the action referred to all actions.
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*
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* @return the position of the action
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*/
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public long getPosition(); |
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/**
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* retrurn if the action can be visible in the user interface or not.
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* This method call the isVisible of the extension asociated to the action,
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* unless the action is inactive.
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* If has a ExclusiveUIExtension set, then this is invoqued instead of the
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* the isVisible of the extension.
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*
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* @return if the action if visible for the user.
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*/
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public boolean isVisible(); |
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/**
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* retrurn if the action is enables.
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* This method call the isEnabled of the extension asociated to the action,
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* unless the action is inactive.
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* This method is used to determine whether it is possible to redirect
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* to this action or not.
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* If has a ExclusiveUIExtension set, then this is invoqued instead of the
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* the isEnabled of the extension.
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*
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* @return if the action if visible for the user.
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*/
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public boolean isEnabled(); |
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/**
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* Execute the code asociated to the action.
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* This method call the execute method of the asociated exetnsion using the
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* command of action as argument.
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* If the action is redirected try to call to the redirected actions.
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*
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*/
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public void execute(); |
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/**
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* Execute the code asociated to the action.
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* Pass the args to the execute of the asociated extension.
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*
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* @see #execute()
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*/
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public void execute(Object[] args); |
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/**
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* Execute the code asociated to the action.
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* Pass the args to the execute of the asociated extension.
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*
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* @see #execute()
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*/
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public void execute(Object arg); |
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/**
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* Return true is the action is active. When an action is active the methods
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* isEnable and isVisible call the methods of the extension asociated to this.
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* When is inactive always return false.
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*
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* @return if the action is active
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*/
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public boolean isActive(); |
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/**
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* Set the active state of an ActionInfo.
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* When the active state is set to false, isEnabled, and isVisible
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* returns false.
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*
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* @param active
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*/
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public void setActive(boolean active); |
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/**
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*
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* An action can redirect the execution of the execute, isVisible and isEnabled methods
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* to other action. Using this method is can be query and set this redirections.
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* The redirect will be established only if the method isEnabled of target action
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* returns true. Otherwise execute methods of initial action.
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*
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* @return the redirections established for this action
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*/
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public Collection<ActionInfo> getRedirections(); |
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} |