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## com.jgoodies.binding.beans
Class BeanUtils

    java.lang.Object
      com.jgoodies.binding.beans.BeanUtils

    public final class BeanUtils

extends Object

Consists exclusively of static methods that provide convenience behavior for working with Java Bean properties.

Version:
  $Revision: 1.22 $
Author:
  Karsten Lentzsch
See Also:
  `Introspector`, `BeanInfo`, `PropertyDescriptor`

Method Summary
`static void` | `addPropertyChangeListener(Object bean, Class<?> beanClass, PropertyChangeListener listener)` Adds a property change listener to the given bean.
`static void` | `addPropertyChangeListener(Object bean, Class<?> beanClass, String propertyName, PropertyChangeListener listener)` Adds a named property change listener to the given bean.
`static void` | `addPropertyChangeListener(Object bean, PropertyChangeListener listener)` Adds a property change listener to the given bean.
`static void` | `addPropertyChangeListener(Object bean, String propertyName, PropertyChangeListener listener)` Adds a named property change listener to the given bean.
`static Method` | `getNamedPCLAdder(Class<?> clazz)` Looks up and returns the method that adds a PropertyChangeListener for a specified property name to instances of the given class.
`static Method` | `getNamedPCLRemover(Class<?> clazz)` Looks up and returns the method that removes a PropertyChangeListener for a specified property name from instances of the given class.
`static Method` | `getPCLAdder(Class<?> clazz)` Looks up and returns the method that adds a multicast PropertyChangeListener to instances of the given class.
`static Method` | `getPCLRemover(Class<?> clazz)` Looks up and returns the method that removes a multicast PropertyChangeListener from instances of the given class.
`static void` | `removePropertyChangeListener(Object bean, Class<?> beanClass, PropertyChangeListener listener)` Removes a property change listener from the given bean.
`static void` | `removePropertyChangeListener(Object bean, Class<?> beanClass, String propertyName, PropertyChangeListener listener)` Removes a named property change listener from the given bean.
`static void` | `removePropertyChangeListener(Object bean, PropertyChangeListener listener)` Removes a property change listener from the given bean.
`static void` | `removePropertyChangeListener(Object bean, String propertyName, PropertyChangeListener listener)` Removes a named property change listener from the given bean.
`static boolean` | `supportsBoundProperties(Class<?> clazz)` Checks and answers whether the given class supports bound properties, i.e. it provides a pair of multicast event listener registration methods for `PropertyChangeListener`s: public void addPropertyChangeListener(PropertyChangeListener x); public void removePropertyChangeListener(PropertyChangeListener x);

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

Method Detail

### supportsBoundProperties

    public static boolean supportsBoundProperties(Class<?> clazz)

  Checks and answers whether the given class supports bound properties, i.e. it provides a pair of multicast event listener registration methods for `PropertyChangeListener`s:

       public void addPropertyChangeListener(PropertyChangeListener x);
       public void removePropertyChangeListener(PropertyChangeListener x);

  Parameters:
    `clazz` - the class to test
  Returns:
    true if the class supports bound properties, false otherwise

### getPCLAdder

    public static Method getPCLAdder(Class<?> clazz)

  Looks up and returns the method that adds a multicast PropertyChangeListener to instances of the given class.

  Parameters:
    `clazz` - the class that provides the adder method
  Returns:
    the method that adds multicast PropertyChangeListeners

### getPCLRemover

    public static Method getPCLRemover(Class<?> clazz)

  Looks up and returns the method that removes a multicast PropertyChangeListener from instances of the given class.

  Parameters:
    `clazz` - the class that provides the remover method
  Returns:
    the method that removes multicast PropertyChangeListeners

### getNamedPCLAdder

    public static Method getNamedPCLAdder(Class<?> clazz)

  Looks up and returns the method that adds a PropertyChangeListener for a specified property name to instances of the given class.

  Parameters:
    `clazz` - the class that provides the adder method
  Returns:
    the method that adds the PropertyChangeListeners

### getNamedPCLRemover

    public static Method getNamedPCLRemover(Class<?> clazz)

  Looks up and returns the method that removes a PropertyChangeListener for a specified property name from instances of the given class.

  Parameters:
    `clazz` - the class that provides the remover method
  Returns:
    the method that removes the PropertyChangeListeners

### addPropertyChangeListener

    public static void addPropertyChangeListener(Object bean,
                                                 Class<?> beanClass,
                                                 PropertyChangeListener listener)

  Adds a property change listener to the given bean. First checks whether the bean supports bound properties, i.e. it provides a pair of methods to register multicast property change event listeners; see section 7.4.1 of the Java Beans specification for details.

  `beanClass` can be a type other than `bean.getClass()`, for example if the bean is specified by public interfaces, and implemented by package private class.

  Parameters:
    `bean` - the bean to add the property change listener to
    `beanClass` - the Bean class used to lookup methods from
    `listener` - the listener to add
  Throws:
    `NullPointerException` - if the bean or listener is `null`
    `IllegalArgumentException` - if the bean is not an instance of the bean class
    `PropertyUnboundException` - if the bean does not support bound properties
    `PropertyNotBindableException` - if the property change handler cannot be added successfully
  Since:
    1.1.1

### addPropertyChangeListener

    public static void addPropertyChangeListener(Object bean,
                                                 Class<?> beanClass,
                                                 String propertyName,
                                                 PropertyChangeListener listener)

  Adds a named property change listener to the given bean. The bean must provide the optional support for listening on named properties as described in section 7.4.5 of the Java Bean Specification. The bean class must provide the method:

       public void addPropertyChangeListener(String name, PropertyChangeListener l);

  `beanClass` can be a type other than `bean.getClass()`, for example if the bean is specified by public interfaces, and implemented by package private class.

  Parameters:
    `bean` - the bean to add a property change handler
    `beanClass` - the Bean class used to lookup methods from
    `propertyName` - the name of the property to be observed
    `listener` - the listener to add
  Throws:
    `NullPointerException` - if the bean, propertyName or listener is `null`
    `IllegalArgumentException` - if the bean is not an instance of the bean class
    `PropertyNotBindableException` - if the property change handler cannot be added successfully

### addPropertyChangeListener

    public static void addPropertyChangeListener(Object bean,
                                                 PropertyChangeListener listener)

  Adds a property change listener to the given bean. First checks whether the bean supports bound properties, i.e. it provides a pair of methods to register multicast property change event listeners; see section 7.4.1 of the Java Beans specification for details.

  Parameters:
    `bean` - the bean to add the property change listener to
    `listener` - the listener to add
  Throws:
    `NullPointerException` - if the bean or listener is `null`
    `PropertyUnboundException` - if the bean does not support bound properties
    `PropertyNotBindableException` - if the property change handler cannot be added successfully

### addPropertyChangeListener

    public static void addPropertyChangeListener(Object bean,
                                                 String propertyName,
                                                 PropertyChangeListener listener)

  Adds a named property change listener to the given bean. The bean must provide the optional support for listening on named properties as described in section 7.4.5 of the Java Bean Specification. The bean class must provide the method:

       public void addPropertyChangeListener(String name, PropertyChangeListener l);

  Parameters:
    `bean` - the bean to add a property change handler
    `propertyName` - the name of the property to be observed
    `listener` - the listener to add
  Throws:
    `NullPointerException` - if the bean, propertyName or listener is `null`
    `PropertyNotBindableException` - if the property change handler cannot be added successfully

### removePropertyChangeListener

    public static void removePropertyChangeListener(Object bean,
                                                    Class<?> beanClass,
                                                    PropertyChangeListener listener)

  Removes a property change listener from the given bean.

  `beanClass` can be a type other than `bean.getClass()`, for example if the bean is specified by public interfaces, and implemented by package private class.

  Parameters:
    `bean` - the bean to remove the property change listener from
    `beanClass` - the Java Bean class used to lookup methods from
    `listener` - the listener to remove
  Throws:
    `NullPointerException` - if the bean or listener is `null`
    `IllegalArgumentException` - if the bean is not an instance of the bean class
    `PropertyUnboundException` - if the bean does not support bound properties
    `PropertyNotBindableException` - if the property change handler cannot be removed successfully
  Since:
    1.1.1

### removePropertyChangeListener

    public static void removePropertyChangeListener(Object bean,
                                                    Class<?> beanClass,
                                                    String propertyName,
                                                    PropertyChangeListener listener)

  Removes a named property change listener from the given bean. The bean must provide the optional support for listening on named properties as described in section 7.4.5 of the Java Bean Specification. The bean class must provide the method:

       public void removePropertyChangeHandler(String name, PropertyChangeListener l);

  `beanClass` can be a type other than `bean.getClass()`, for example if the bean is specified by public interfaces, and implemented by package private class.

  Parameters:
    `bean` - the bean to remove the property change listener from
    `beanClass` - the Java Bean class used to lookup methods from
    `propertyName` - the name of the observed property
    `listener` - the listener to remove
  Throws:
    `NullPointerException` - if the bean, propertyName, or listener is `null`
    `IllegalArgumentException` - if the bean is not an instance of the bean class
    `PropertyNotBindableException` - if the property change handler cannot be removed successfully
  Since:
    1.1.1

### removePropertyChangeListener

    public static void removePropertyChangeListener(Object bean,
                                                    PropertyChangeListener listener)

  Removes a property change listener from the given bean.

  Parameters:
    `bean` - the bean to remove the property change listener from
    `listener` - the listener to remove
  Throws:
    `NullPointerException` - if the bean or listener is `null`
    `PropertyUnboundException` - if the bean does not support bound properties
    `PropertyNotBindableException` - if the property change handler cannot be removed successfully

### removePropertyChangeListener

    public static void removePropertyChangeListener(Object bean,
                                                    String propertyName,
                                                    PropertyChangeListener listener)

  Removes a named property change listener from the given bean. The bean must provide the optional support for listening on named properties as described in section 7.4.5 of the Java Bean Specification. The bean class must provide the method:

       public void removePropertyChangeHandler(String name, PropertyChangeListener l);

  `beanClass` can be a type other than `bean.getClass()`, for example if the bean is specified by public interfaces, and implemented by package private class.

  Parameters:
    `bean` - the bean to remove the property change listener from
    `propertyName` - the name of the observed property
    `listener` - the listener to remove
  Throws:
    `NullPointerException` - if the bean, propertyName, or listener is `null`
    `PropertyNotBindableException` - if the property change handler cannot be removed successfully

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