Module java.desktop

Package java.beans.beancontext

Interface BeanContext

All Superinterfaces:

BeanContextChild, Collection, DesignMode, Iterable, Visibility

All Known Subinterfaces:

BeanContextServices

All Known Implementing Classes:

BeanContextServicesSupport, BeanContextSupport

public interface BeanContext
extends BeanContextChild, Collection, DesignMode, Visibility

The BeanContext acts a logical hierarchical container for JavaBeans.

Since:

1.2

See Also:

• Beans
• BeanContextChild
• BeanContextMembershipListener
• PropertyChangeEvent
• DesignMode
• Visibility
• Collection

Field Summary

Fields

Modifier and Type	Field	Description
static final Object	globalHierarchyLock	This global lock is used by both BeanContext and BeanContextServices implementors to serialize changes in a BeanContext hierarchy and any service requests etc.

Fields declared in interface java.beans.DesignMode

PROPERTYNAME

Method Summary

Modifier and Type	Method	Description
void	addBeanContextMembershipListener(BeanContextMembershipListener bcml)	Adds the specified BeanContextMembershipListener to receive BeanContextMembershipEvents from this BeanContext whenever it adds or removes a child Component(s).
URL	getResource(String name, BeanContextChild bcc)	Analagous to java.lang.ClassLoader.getResource(), this method allows a BeanContext implementation to interpose behavior between the child Component and underlying ClassLoader.
InputStream	getResourceAsStream(String name, BeanContextChild bcc)	Analagous to java.lang.ClassLoader.getResourceAsStream(), this method allows a BeanContext implementation to interpose behavior between the child Component and underlying ClassLoader.
Object	instantiateChild(String beanName)	Instantiate the javaBean named as a child of this BeanContext.
void	removeBeanContextMembershipListener(BeanContextMembershipListener bcml)	Removes the specified BeanContextMembershipListener so that it no longer receives BeanContextMembershipEvents when the child Component(s) are added or removed.

Methods declared in interface java.beans.beancontext.BeanContextChild

addPropertyChangeListener, addVetoableChangeListener, getBeanContext, removePropertyChangeListener, removeVetoableChangeListener, setBeanContext

Methods declared in interface java.util.Collection

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, parallelStream, remove, removeAll, removeIf, retainAll, size, spliterator, stream, toArray, toArray, toArray

Methods declared in interface java.beans.DesignMode

isDesignTime, setDesignTime

Methods declared in interface java.lang.Iterable

forEach

Methods declared in interface java.beans.Visibility

avoidingGui, dontUseGui, needsGui, okToUseGui

Field Details

globalHierarchyLock

static final Object globalHierarchyLock

This global lock is used by both BeanContext and BeanContextServices implementors to serialize changes in a BeanContext hierarchy and any service requests etc.

Method Details

instantiateChild

Object instantiateChild(String beanName)
                 throws IOException,
ClassNotFoundException

Instantiate the javaBean named as a child of this BeanContext. The implementation of the JavaBean is derived from the value of the beanName parameter, and is defined by the java.beans.Beans.instantiate() method.

Parameters:

beanName - The name of the JavaBean to instantiate as a child of this BeanContext

Returns:

a javaBean named as a child of this BeanContext

Throws:

IOException - if an IO problem occurs

ClassNotFoundException - if the class identified by the beanName parameter is not found

getResourceAsStream

InputStream getResourceAsStream(String name,
 BeanContextChild bcc)
                         throws IllegalArgumentException

Analagous to java.lang.ClassLoader.getResourceAsStream(), this method allows a BeanContext implementation to interpose behavior between the child Component and underlying ClassLoader.

Parameters:

name - the resource name

bcc - the specified child

Returns:

an InputStream for reading the resource, or null if the resource could not be found.

Throws:

IllegalArgumentException - if the resource is not valid

getResource

URL getResource(String name,
 BeanContextChild bcc)
         throws IllegalArgumentException

Analagous to java.lang.ClassLoader.getResource(), this method allows a BeanContext implementation to interpose behavior between the child Component and underlying ClassLoader.

Parameters:

name - the resource name

bcc - the specified child

Returns:

a URL for the named resource for the specified child

Throws:

IllegalArgumentException - if the resource is not valid

addBeanContextMembershipListener

void addBeanContextMembershipListener(BeanContextMembershipListener bcml)

Adds the specified BeanContextMembershipListener to receive BeanContextMembershipEvents from this BeanContext whenever it adds or removes a child Component(s).

Parameters:

bcml - the BeanContextMembershipListener to be added

removeBeanContextMembershipListener

void removeBeanContextMembershipListener(BeanContextMembershipListener bcml)

Removes the specified BeanContextMembershipListener so that it no longer receives BeanContextMembershipEvents when the child Component(s) are added or removed.

Parameters:

bcml - the BeanContextMembershipListener to be removed