IlvPlugin (Rogue Wave JViews 9.1 API)

java.lang.Object
- ilog.views.appframe.plugin.IlvPlugin

```
public class IlvPlugin
extends Object
```
A plug-in is a set of libraries and resource files that are dynamically loaded and added to an application to extend its features. There is no limitation on a plug-in for extending the application features. All that is specified when creating an application can be done from within a plug-in.
For example, a plug-in can specify new types of document that the application can open or can override the settings of the application. A plug-in can also override the processing of the actions of the application by adding new action handlers with its associated plug-in installer.
Plug-in properties
Properties of a plug-in are defined with the attributes of the root <plugin> element in the plugin.xml of the plug-in. Plug-in properties are:
- name: Defined with the name attribute. It is accessible with the getName() method.
- version: Defined with the version attribute or the name of the directory that contains the plug-in. It is accessible with the getVersion() and getPluginVersion() methods.
  The value of the version attribute must have the following format:
```
<Major version>[.<Minor version>[.<Service version>[.<Qualifier version>]]]
```
  As an example, valid versions can be:
  - 1
  - 1.0
  - 2.5.6
  - 2.8.2.build_1568
  - 4.5.1.25497
  If the version attribute is not defined, the version is determined from the name of the directory that contains the plug-in. In this case, the name of the directory must be constructed as follows:
```
<ID of the plug-in>_<Major version component>.<Minor version component>.<Service version component>.<qualifier version component>
```
  Here is a list of valid directory names that include the specification of a version:
  - modeling_1
  - modeling_1.0
  - modeling_1.1.0
  - modeling_1.1.0.build_546
  If neither the version attribute is specified nor the directory name includes a version specification, the plug-in is set the version 1.0.0
- providerName: Defined with the provider-name attribute. It is accessible with the getProviderName() method.
- ID: Defined with the id attribute. It is accessible with the getID() method.
- description: Defined with the description attribute. It is accessible with the getDescription() method.
- installMode: Defined with the installMode attribute. It is accessible with the getInstallMode() method.
- Class of the plug-in installer: Defined with the pluginInstallerJavaClass attribute. If this attribute is specified, a IlvPluginInstaller is automatically instantiated with the specified class and is accessible with the method getInstaller().
Plug-in resource files
When plug-ins are installed, settings and resource property files specific to the plug-in are added to the application. Files are referred to in the plugin.xml file of the plug-in with file names that are relative to the root path of the library Jar file of the plug-in that contains them.
Settings files are declared in the XML elements selected with the /plugin/settings/file XPath expression. The relative file name of the settings file is provided with the name attribute of those selected elements.
Resource property files are declared in the XML elements selected with the /plugin/resources/resource XPath expression. The relative filename of the resource property file is provided with the name attribute of those selected elements.
Plug-in libraries
Classes and resource files specific to a plug-in are contained in library Jar files that are added to the class loader of the host application when the plug-in is installed. Libraries are declared in the plugin.xml file of the plug-in in the settings elements selected with the /plugin/runtime/library XPath expression. The filename is defined in the name attribute of those settings elements and is relative to the directory that contains the plug-in.
You can find documentation and examples of using plug-ins in the Rogue Wave JViews Application Framework User's Manual, in the chapter on Plug-ins.
See Also:

IlvPluginManager

Method Summary

All Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method and Description
`IlvApplication`	`getApplication()` Returns the application of the plug-in.
`ClassLoader`	`getClassLoader()` The class loader associated with this plugin.
`ClassLoader[]`	`getClassLoaders()` Deprecated. Only one class loader is created for each plugin. This class loader takes into account all the libraries of the plugin as well as all the plugin that are required by this plugin. This method returns an array of one class loader that contains the class loader given with the method `getClassLoader()`.
`IlvPlugin`	`getDependentPlugin(int index)` Returns the plug-in at the specified storage `index` in the list of installed plug-ins that depend on this plug-in.
`int`	`getDependentPluginCount()` Returns the number of installed plug-ins that depend on this plug-in.
`String`	`getDescription()` Returns the description of the plug-in.
`File`	`getDirectory()` Returns the file directory where this plug-in is defined.
`String`	`getID()` Returns the ID of this plug-in.
`IlvPluginInstaller`	`getInstaller()` Returns the installer of the plug-in.
`String`	`getInstallMode()` Returns the installation mode of this plug-in as defined in the `plugin.xml` file of this plug-in.
`String`	`getName()` Returns the name of the plug-in.
`String`	`getNameKey()` Returns the resource key of the name of the plug-in.
`IlvPlugin`	`getParentPlugin()` Returns the plug-in that owns the plug-in.
`IlvPlugin`	`getPlugin(int index)` Returns the child plug-in stored at the specified `index`.
`IlvPlugin`	`getPlugin(String id)` Returns the child plug-in of this plug-in with the specified ID.
`int`	`getPluginCount()` Returns the number of child plug-ins owned by this plug-in.
`IlvPluginManager`	`getPluginManager()` Returns the plugin manager that contains this plugin.
`IlvPlugin[]`	`getPlugins()` Returns the child plug-ins of this plug-in.
`IlvPluginVersion`	`getPluginVersion()` Returns the `IlvPluginVersion` of this plug-in.
`String`	`getPropertyFile(int index)` Returns the property file at the specified storage `index`.
`int`	`getPropertyFileCount()` Returns the number of property files declared in the `plugin.xml` file of this plug-in.
`String`	`getProviderName()` Returns the name of the provider of this plug-in.
`ResourceBundle`	`getResourceBundle()` Returns the resource bundle that contains all the internationalization resources declared in the `plugin.xml` file of this plug-in.
`IlvSettingsElement`	`getSettingsElement()` Returns the `<plugin>` root settings element that defines the plug-in in its associated `plugin.xml` file.
`IlvSettingsManager`	`getSettingsManager()` Returns the settings manager that manages the settings of this plug-in.
`URL`	`getURL()` Returns the URL of the file directory where this plug-in is defined.
`IlvURLResolver`	`getURLResolver()` Returns the URL resolver that resolves URLs for resources defined in this plug-in.
`String`	`getVersion()` Returns the version of this plug-in as a string.
`boolean`	`isInstalled()` Determines whether the plug-in is installed.
`void`	`setApplication(IlvApplication application)` Sets the application of the plug-in.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - getProviderName
```
public String getProviderName()
```
    Returns the name of the provider of this plug-in.
  - getVersion
```
public String getVersion()
```
    Returns the version of this plug-in as a string.
    
    See Also:
    
    getPluginVersion()
  - getPluginVersion
```
public IlvPluginVersion getPluginVersion()
```
    Returns the IlvPluginVersion of this plug-in.
    
    See Also:
    
    getVersion()
  - getID
```
public String getID()
```
    Returns the ID of this plug-in. If no ID has been specified in the plugin.xml definition file, the returned ID the name of the directory that contains the plug-in.
  - setApplication
```
public void setApplication(IlvApplication application)
```
    Sets the application of the plug-in. This method is invoked by the plug-in manager to set the application that this plug-in will be added to. This method should not be overridden by adding initialization code that may impact the host application, since this plug-in may not be installed in the application. Instead, you are recommended to add some initialization code to the plug-in installer associated with this plug-in.
    
    Parameters:
    
    application - The application of the plug-in.
    
    See Also:
    
    getApplication(), IlvPluginInstaller
  - getApplication
```
public IlvApplication getApplication()
```
    Returns the application of the plug-in.
    
    See Also:
    
    setApplication(ilog.views.appframe.IlvApplication)
  - getDirectory
```
public File getDirectory()
```
    Returns the file directory where this plug-in is defined.
  - getURL
```
public URL getURL()
```
    Returns the URL of the file directory where this plug-in is defined. If the plugin is entirely located inside a jar file, it returns the base location inside the jar file.
    
    Since:
    
    JViews 7.5
  - getName
```
public String getName()
```
    Returns the name of the plug-in. This name is set in the plugin.xml file defining the plug-in.
  - getNameKey
```
public String getNameKey()
```
    Returns the resource key of the name of the plug-in. If not null, the name of the plug-in is obtained via getString(getNameKey()).
    
    Since:
    
    JViews 8.7
  - getClassLoaders
```
@Deprecated
public ClassLoader[] getClassLoaders()
```
    Deprecated. Only one class loader is created for each plugin. This class loader takes into account all the libraries of the plugin as well as all the plugin that are required by this plugin.
    This method returns an array of one class loader that contains the class loader given with the method getClassLoader().
    
    Returns the array of class loaders for this plug-in. One class loader is created for each library referenced in the plugin.xml file of the plug-in.
  - getURLResolver
```
public IlvURLResolver getURLResolver()
```
    Returns the URL resolver that resolves URLs for resources defined in this plug-in.
  - getResourceBundle
```
public ResourceBundle getResourceBundle()
```
    Returns the resource bundle that contains all the internationalization resources declared in the plugin.xml file of this plug-in.
    
    Returns:
    
    The resource bundle of the application.
    
    See Also:
    
    getPropertyFileCount(), getPropertyFile(int)
  - getPropertyFileCount
```
public int getPropertyFileCount()
```
    Returns the number of property files declared in the plugin.xml file of this plug-in.
    
    See Also:
    
    getPropertyFile(int)
  - getPropertyFile
```
public String getPropertyFile(int index)
```
    Returns the property file at the specified storage index.
    
    See Also:
    
    getResourceBundle(), getPropertyFileCount()
  - getClassLoader
```
public ClassLoader getClassLoader()
```
    The class loader associated with this plugin.
    This class loader allows to find resources and classes that are in the directory of the plugin or in the libraries declared in the plugin.xml manifest file of the plugin.
    
    Returns:
    
    The class loader of this plugin.
    
    Since:
    
    Java Application Framework 2.0
  - isInstalled
```
public boolean isInstalled()
```
    Determines whether the plug-in is installed.
    
    Returns:
    
    true if the plug-in is installed; false otherwise.
  - getPlugin
```
public IlvPlugin getPlugin(String id)
```
    Returns the child plug-in of this plug-in with the specified ID. Child plug-ins are optional and are defined in the plugin.xml file of this plug-in as child elements of the element selected with plugin/plugins.
    
    Parameters:
    
    id - The ID of the plug-in to return.
    
    Returns:
    
    The child plug-in with the specified ID or null if no child plug-ins are defined with this ID.
    
    See Also:
    
    getPlugin(int), getPlugins()
  - getPlugin
```
public IlvPlugin getPlugin(int index)
```
    Returns the child plug-in stored at the specified index.
    
    See Also:
    
    getPlugin(String), getPlugins()
  - getPlugins
```
public IlvPlugin[] getPlugins()
```
    Returns the child plug-ins of this plug-in. Child plug-ins are optional and are defined in the plugin.xml file of this plug-in as child elements of the element selected with plugin/plugins.
  - getPluginCount
```
public int getPluginCount()
```
    Returns the number of child plug-ins owned by this plug-in.
    
    See Also:
    
    getPlugins()
  - getSettingsManager
```
public IlvSettingsManager getSettingsManager()
```
    Returns the settings manager that manages the settings of this plug-in. Settings of a plug-in are defined in the plugin.xml file of this plug-in with the elements selected with plugin/settings/file XPath expression.
  - getParentPlugin
```
public IlvPlugin getParentPlugin()
```
    Returns the plug-in that owns the plug-in.
    
    Returns:
    
    The parent plug-in.
  - getDependentPluginCount
```
public int getDependentPluginCount()
```
    Returns the number of installed plug-ins that depend on this plug-in. If a plug-in has dependent plug-ins, it cannot be uninstalled.
    A plug-in A depends on another plug-in B if A refers to B in its list of required plug-ins or if A is a child plug-in of B.
    
    Returns:
    
    The number of dependent plug-ins.
    
    See Also:
    
    getDependentPlugin(int)
  - getDependentPlugin
```
public IlvPlugin getDependentPlugin(int index)
```
    Returns the plug-in at the specified storage index in the list of installed plug-ins that depend on this plug-in.
    
    Returns:
    
    The dependent plug-in at the specified index.
    
    See Also:
    
    getDependentPluginCount()
  - getInstallMode
```
public String getInstallMode()
```
    Returns the installation mode of this plug-in as defined in the plugin.xml file of this plug-in. The return value can be one of the following:
    . It is also possible to provide another value for this mode. It is then the responsibility of the plug-in manager to interpret this value with the method IlvPluginManager.isInitiallyInstalled(ilog.views.appframe.plugin.IlvPlugin) to determine whether this plug-in should be installed when the application is being launched.
  - getInstaller
```
public IlvPluginInstaller getInstaller()
```
    Returns the installer of the plug-in. The installer is instantiated from the installer class specified in the plugin.xml file of the plug-in.
    
    Returns:
    
    The installer of the plug-in or null if no plug-in installer is specified in the plugin.xml file of the plug-in.
  - getSettingsElement
```
public IlvSettingsElement getSettingsElement()
```
    Returns the <plugin> root settings element that defines the plug-in in its associated plugin.xml file.
    This settings element can be used for accessing user information that has not been interpreted for the plug-in.
  - getDescription
```
public String getDescription()
```
    Returns the description of the plug-in. The returned string corresponds to the value of the "description" attribute of the root <plugin> element in the plugin.xml file of this plug-in. This string is probably a key of a resource string that should be translated according to the locale.
    
    Returns:
    
    The description of the plug-in.
  - getPluginManager
```
public IlvPluginManager getPluginManager()
```
    Returns the plugin manager that contains this plugin.

Class IlvPlugin

Method Summary

Methods inherited from class java.lang.Object

Method Detail

getProviderName

getVersion

getPluginVersion

getID

setApplication

getApplication

getDirectory

getURL

getName

getNameKey

getClassLoaders

getURLResolver

getResourceBundle

getPropertyFileCount

getPropertyFile

getClassLoader

isInstalled

getPlugin

getPlugin

getPlugins

getPluginCount

getSettingsManager

getParentPlugin

getDependentPluginCount

getDependentPlugin

getInstallMode

getInstaller

getSettingsElement

getDescription

getPluginManager