java.beans.beancontext
Interface BeanContext

All Superinterfaces:

BeanContextChild, Collection, DesignMode, 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, java.beans.VetoableChangeEvent, DesignMode, Visibility, Collection

Field Summary

static 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 inherited from interface java.beans.DesignMode

PROPERTYNAME

Method Summary

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 inherited from interface java.beans.beancontext.BeanContextChild

addPropertyChangeListener, addVetoableChangeListener, getBeanContext, removePropertyChangeListener, removeVetoableChangeListener, setBeanContext

Methods inherited from interface java.util.Collection

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, remove, removeAll, retainAll, size, toArray, toArray

Methods inherited from interface java.beans.DesignMode

isDesignTime, setDesignTime

Methods inherited from interface java.beans.Visibility

avoidingGui, dontUseGui, needsGui, okToUseGui

Field Detail

globalHierarchyLock

public 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 Detail

instantiateChild

public 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

Throws:

IOException

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

IOException

ClassNotFoundException

getResourceAsStream

public 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

IllegalArgumentException

getResource

public 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

IllegalArgumentException

addBeanContextMembershipListener

public 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

public 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