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package javax.naming;
This class represents a name-to-object binding found in a context.
A context consists of name-to-object bindings.
The Binding class represents such a binding. It consists
of a name and an object. The Context.listBindings()
method returns an enumeration of Binding.
Use subclassing for naming systems that generate contents of
a binding dynamically.
A Binding instance is not synchronized against concurrent access by multiple
threads. Threads that need to access a Binding concurrently should
synchronize amongst themselves and provide the necessary locking.
Author: Rosanna Lee, Scott Seligman Since: 1.3
/**
* This class represents a name-to-object binding found in a context.
*<p>
* A context consists of name-to-object bindings.
* The Binding class represents such a binding. It consists
* of a name and an object. The <code>Context.listBindings()</code>
* method returns an enumeration of Binding.
*<p>
* Use subclassing for naming systems that generate contents of
* a binding dynamically.
*<p>
* A Binding instance is not synchronized against concurrent access by multiple
* threads. Threads that need to access a Binding concurrently should
* synchronize amongst themselves and provide the necessary locking.
*
* @author Rosanna Lee
* @author Scott Seligman
* @since 1.3
*/
public class Binding extends NameClassPair {
Contains this binding's object. It is initialized by the constructor and can be updated using setObject. See Also: @serial
/**
* Contains this binding's object.
* It is initialized by the constructor and can be updated using
* {@code setObject}.
* @serial
* @see #getObject
* @see #setObject
*/
@SuppressWarnings("serial") // Not statically typed as Serializable
private Object boundObj;
Constructs an instance of a Binding given its name and object.
getClassName() will return the class name of obj (or null if obj is null) unless the class name has been explicitly set using setClassName()
Params: - name – The non-null name of the object. It is relative
to the target context (which is
named by the first parameter of the
listBindings() method) - obj – The possibly null object bound to name.
See Also:
/**
* Constructs an instance of a Binding given its name and object.
*<p>
* {@code getClassName()} will return
* the class name of {@code obj} (or null if {@code obj} is null)
* unless the class name has been explicitly set using {@code setClassName()}
*
* @param name The non-null name of the object. It is relative
* to the <em>target context</em> (which is
* named by the first parameter of the <code>listBindings()</code> method)
* @param obj The possibly null object bound to name.
* @see NameClassPair#setClassName
*/
public Binding(String name, Object obj) {
super(name, null);
this.boundObj = obj;
}
Constructs an instance of a Binding given its name, object, and whether
the name is relative.
getClassName() will return the class name of obj (or null if obj is null) unless the class name has been explicitly set using setClassName()
Params: - name – The non-null string name of the object.
- obj – The possibly null object bound to name.
- isRelative – true if
name is a name relative
to the target context (which is named by
the first parameter of the listBindings() method);
false if name is a URL string.
See Also:
/**
* Constructs an instance of a Binding given its name, object, and whether
* the name is relative.
*<p>
* {@code getClassName()} will return the class name of {@code obj}
* (or null if {@code obj} is null) unless the class name has been
* explicitly set using {@code setClassName()}
*
* @param name The non-null string name of the object.
* @param obj The possibly null object bound to name.
* @param isRelative true if <code>name</code> is a name relative
* to the target context (which is named by
* the first parameter of the <code>listBindings()</code> method);
* false if <code>name</code> is a URL string.
* @see NameClassPair#isRelative
* @see NameClassPair#setRelative
* @see NameClassPair#setClassName
*/
public Binding(String name, Object obj, boolean isRelative) {
super(name, null, isRelative);
this.boundObj = obj;
}
Constructs an instance of a Binding given its name, class name, and object.
Params: - name – The non-null name of the object. It is relative
to the target context (which is
named by the first parameter of the
listBindings() method) - className – The possibly null class name of the object bound to
name. If null, the class name of obj is returned by getClassName(). If obj is also null, getClassName() will return null. - obj – The possibly null object bound to name.
See Also:
/**
* Constructs an instance of a Binding given its name, class name, and object.
*
* @param name The non-null name of the object. It is relative
* to the <em>target context</em> (which is
* named by the first parameter of the <code>listBindings()</code> method)
* @param className The possibly null class name of the object
* bound to {@code name}. If null, the class name of {@code obj} is
* returned by {@code getClassName()}. If {@code obj} is also
* null, {@code getClassName()} will return null.
* @param obj The possibly null object bound to name.
* @see NameClassPair#setClassName
*/
public Binding(String name, String className, Object obj) {
super(name, className);
this.boundObj = obj;
}
Constructs an instance of a Binding given its
name, class name, object, and whether the name is relative.
Params: - name – The non-null string name of the object.
- className – The possibly null class name of the object bound to
name. If null, the class name of obj is returned by getClassName(). If obj is also null, getClassName() will return null. - obj – The possibly null object bound to name.
- isRelative – true if
name is a name relative
to the target context (which is named by
the first parameter of the listBindings() method);
false if name is a URL string.
See Also:
/**
* Constructs an instance of a Binding given its
* name, class name, object, and whether the name is relative.
*
* @param name The non-null string name of the object.
* @param className The possibly null class name of the object
* bound to {@code name}. If null, the class name of {@code obj} is
* returned by {@code getClassName()}. If {@code obj} is also
* null, {@code getClassName()} will return null.
* @param obj The possibly null object bound to name.
* @param isRelative true if <code>name</code> is a name relative
* to the target context (which is named by
* the first parameter of the <code>listBindings()</code> method);
* false if <code>name</code> is a URL string.
* @see NameClassPair#isRelative
* @see NameClassPair#setRelative
* @see NameClassPair#setClassName
*/
public Binding(String name, String className, Object obj, boolean isRelative) {
super(name, className, isRelative);
this.boundObj = obj;
}
Retrieves the class name of the object bound to the name of this binding.
If the class name has been set explicitly, return it.
Otherwise, if this binding contains a non-null object,
that object's class name is used. Otherwise, null is returned.
Returns: A possibly null string containing class name of object bound.
/**
* Retrieves the class name of the object bound to the name of this binding.
* If the class name has been set explicitly, return it.
* Otherwise, if this binding contains a non-null object,
* that object's class name is used. Otherwise, null is returned.
*
* @return A possibly null string containing class name of object bound.
*/
public String getClassName() {
String cname = super.getClassName();
if (cname != null) {
return cname;
}
if (boundObj != null)
return boundObj.getClass().getName();
else
return null;
}
Retrieves the object bound to the name of this binding.
See Also: Returns: The object bound; null if this binding does not contain an object.
/**
* Retrieves the object bound to the name of this binding.
*
* @return The object bound; null if this binding does not contain an object.
* @see #setObject
*/
public Object getObject() {
return boundObj;
}
Sets the object associated with this binding.
Params: - obj – The possibly null object to use.
See Also:
/**
* Sets the object associated with this binding.
* @param obj The possibly null object to use.
* @see #getObject
*/
public void setObject(Object obj) {
boundObj = obj;
}
Generates the string representation of this binding.
The string representation consists of the string representation
of the name/class pair and the string representation of
this binding's object, separated by ':'.
The contents of this string is useful
for debugging and is not meant to be interpreted programmatically.
Returns: The non-null string representation of this binding.
/**
* Generates the string representation of this binding.
* The string representation consists of the string representation
* of the name/class pair and the string representation of
* this binding's object, separated by ':'.
* The contents of this string is useful
* for debugging and is not meant to be interpreted programmatically.
*
* @return The non-null string representation of this binding.
*/
public String toString() {
return super.toString() + ":" + getObject();
}
Use serialVersionUID from JNDI 1.1.1 for interoperability
/**
* Use serialVersionUID from JNDI 1.1.1 for interoperability
*/
private static final long serialVersionUID = 8839217842691845890L;
};