Package javaa.beans

Class Beans

java.lang.Object
javaa.beans.Beans
public class Beans extends Object
This class Beans provides some methods for manipulting bean controls.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Beans()
    Constructs a Beans instance.

  • Method Summary

    Modifier and Type
    Method
    Description
    static Object
    getInstanceOf(Object bean, Class<?> targetType)
    Obtain an alternative type view of the given bean.
    static Object
    instantiate(ClassLoader loader, String name)
    Obtains an instance of a JavaBean specified the bean name using the specified class loader.
    static Object
    instantiate(ClassLoader cls, String beanName, BeanContext beanContext)
    Obtains an instance of a JavaBean specified the bean name using the specified class loader, and adds the instance into the specified bean context.
    static boolean
    isDesignTime()
    Determine if it's in design-mode.
    static boolean
    isGuiAvailable()
    Returns a boolean indication of whether or not a GUI is available for beans.
    static boolean
    isInstanceOf(Object bean, Class<?> targetType)
    Determine if the the specified bean object can be viewed as the specified type.
    static void
    setDesignTime(boolean isDesignTime)
    Used to indicate whether of not it's in an application construction environment.
    static void
    setGuiAvailable(boolean isGuiAvailable)
    Set whether or not a GUI is available in the bean's current environment.

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Beans

      public Beans()
      Constructs a Beans instance.

  • Method Details

    • instantiate

      public static Object instantiate(ClassLoader loader, String name) throws IOException, ClassNotFoundException
      Obtains an instance of a JavaBean specified the bean name using the specified class loader.

      If the specified class loader is null, the system class loader is used.

      Parameters:
      loader - the specified class loader. It can be null.
      name - the name of the JavaBean
      Returns:
      an isntance of the bean.
      Throws:
      IOException
      ClassNotFoundException

    • instantiate

      public static Object instantiate(ClassLoader cls, String beanName, BeanContext beanContext) throws IOException, ClassNotFoundException
      Obtains an instance of a JavaBean specified the bean name using the specified class loader, and adds the instance into the specified bean context.

      If the specified class loader is null, the system class loader is used.

      Parameters:
      cls - the specified class loader. It can be null.
      beanName - the name of the JavaBean
      beanContext - the beancontext in which the bean instance will be added.
      Returns:
      an instance of the specified JavaBean.
      Throws:
      IOException
      ClassNotFoundException

    • getInstanceOf

      public static Object getInstanceOf(Object bean, Class<?> targetType)
      Obtain an alternative type view of the given bean. The view type is specified by the parameter type.

      If the type view cannot be obtained, the original bean object is returned.

      Parameters:
      bean - the original bean object.
      targetType - the specified view type.
      Returns:
      a type view of the given bean.

    • isInstanceOf

      public static boolean isInstanceOf(Object bean, Class<?> targetType)
      Determine if the the specified bean object can be viewed as the specified type.
      Parameters:
      bean - the specified bean object.
      targetType - the specifed view type.
      Returns:
      true if the specified bean object can be viewed as the specified type; otherwise, return false;

    • setGuiAvailable

      public static void setGuiAvailable(boolean isGuiAvailable) throws SecurityException
      Set whether or not a GUI is available in the bean's current environment.
      Parameters:
      isGuiAvailable - should be true to signify that a GUI is available, false otherwise.
      Throws:
      SecurityException - if the caller does not have the required permission to access or modify system properties.

    • setDesignTime

      public static void setDesignTime(boolean isDesignTime) throws SecurityException
      Used to indicate whether of not it's in an application construction environment.
      Parameters:
      isDesignTime - true to indicate that it's in application construction environment.
      Throws:
      SecurityException

    • isGuiAvailable

      public static boolean isGuiAvailable()
      Returns a boolean indication of whether or not a GUI is available for beans.
      Returns:
      true if a GUI is available, otherwise false.

    • isDesignTime

      public static boolean isDesignTime()
      Determine if it's in design-mode.
      Returns:
      true if it's in an application construction environment.