javax.naming.directory
Class BasicAttributes

java.lang.Object
  javax.naming.directory.BasicAttributes

All Implemented Interfaces:

Attributes, Cloneable, Serializable

public class BasicAttributes

extends Object

implements Attributes

This class provides a basic implementation of the Attributes interface.

BasicAttributes is either case-sensitive or case-insensitive (case-ignore). This property is determined at the time the BasicAttributes constructor is called. In a case-insensitive BasicAttributes, the case of its attribute identifiers is ignored when searching for an attribute, or adding attributes. In a case-sensitive BasicAttributes, the case is significant.

When the BasicAttributes class needs to create an Attribute, it uses BasicAttribute. There is no other dependency on BasicAttribute.

Note that updates to BasicAttributes (such as adding or removing an attribute) does not affect the corresponding representation in the directory. Updates to the directory can only be effected using operations in the DirContext interface.

A BasicAttributes instance is not synchronized against concurrent multithreaded access. Multiple threads trying to access and modify a single BasicAttributes instance should lock the object.

Since:

1.3

See Also:

DirContext.getAttributes(javax.naming.Name), DirContext.modifyAttributes(javax.naming.Name, int, javax.naming.directory.Attributes), DirContext.bind(javax.naming.Name, java.lang.Object, javax.naming.directory.Attributes), DirContext.rebind(javax.naming.Name, java.lang.Object, javax.naming.directory.Attributes), DirContext.createSubcontext(javax.naming.Name, javax.naming.directory.Attributes), DirContext.search(javax.naming.Name, javax.naming.directory.Attributes, java.lang.String[]), Serialized Form

Constructor Summary

BasicAttributes()
Constructs a new instance of Attributes.

BasicAttributes(boolean ignoreCase)
Constructs a new instance of Attributes.

BasicAttributes(String attrID, Object val)
Constructs a new instance of Attributes with one attribute.

BasicAttributes(String attrID, Object val, boolean ignoreCase)
Constructs a new instance of Attributes with one attribute.

Method Summary

Object	clone() Makes a copy of the attribute set.
boolean	equals(Object obj) Determines whether this BasicAttributes is equal to another Attributes Two Attributes are equal if they are both instances of Attributes, treat the case of attribute IDs the same way, and contain the same attributes.
Attribute	get(String attrID) Retrieves the attribute with the given attribute id from the attribute set.
NamingEnumeration	getAll() Retrieves an enumeration of the attributes in the attribute set.
NamingEnumeration	getIDs() Retrieves an enumeration of the ids of the attributes in the attribute set.
int	hashCode() Calculates the hash code of this BasicAttributes.
boolean	isCaseIgnored() Determines whether the attribute set ignores the case of attribute identifiers when retrieving or adding attributes.
Attribute	put(Attribute attr) Adds a new attribute to the attribute set.
Attribute	put(String attrID, Object val) Adds a new attribute to the attribute set.
Attribute	remove(String attrID) Removes the attribute with the attribute id 'attrID' from the attribute set.
int	size() Retrieves the number of attributes in the attribute set.
String	toString() Generates the string representation of this attribute set.

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

BasicAttributes

public BasicAttributes()

Constructs a new instance of Attributes. The character case of attribute identifiers is significant when subsequently retrieving or adding attributes.

BasicAttributes

public BasicAttributes(boolean ignoreCase)

Constructs a new instance of Attributes. If ignoreCase is true, the character case of attribute identifiers is ignored; otherwise the case is significant.

Parameters:

ignoreCase - true means this attribute set will ignore the case of its attribute identifiers when retrieving or adding attributes; false means case is respected.

BasicAttributes

public BasicAttributes(String attrID,
                       Object val)

Constructs a new instance of Attributes with one attribute. The attribute specified by attrID and val are added to the newly created attribute. The character case of attribute identifiers is significant when subsequently retrieving or adding attributes.

Parameters:

attrID - non-null The id of the attribute to add.

val - The value of the attribute to add. If null, a null value is added to the attribute.

BasicAttributes

public BasicAttributes(String attrID,
                       Object val,
                       boolean ignoreCase)

Constructs a new instance of Attributes with one attribute. The attribute specified by attrID and val are added to the newly created attribute. If ignoreCase is true, the character case of attribute identifiers is ignored; otherwise the case is significant.

Parameters:

attrID - non-null The id of the attribute to add. If this attribute set ignores the character case of its attribute ids, the case of attrID is ignored.

val - The value of the attribute to add. If null, a null value is added to the attribute.

ignoreCase - true means this attribute set will ignore the case of its attribute identifiers when retrieving or adding attributes; false means case is respected.

Method Detail

clone

public Object clone()

Description copied from interface: Attributes

Makes a copy of the attribute set. The new set contains the same attributes as the original set: the attributes are not themselves cloned. Changes to the copy will not affect the original and vice versa.

Specified by:

clone in interface Attributes

Overrides:

clone in class Object

Returns:

a clone of this instance.

See Also:

Cloneable

isCaseIgnored

public boolean isCaseIgnored()

Description copied from interface: Attributes

Determines whether the attribute set ignores the case of attribute identifiers when retrieving or adding attributes.

Specified by:

isCaseIgnored in interface Attributes

Returns:

true if case is ignored; false otherwise.

size

public int size()

Description copied from interface: Attributes

Retrieves the number of attributes in the attribute set.

Specified by:

size in interface Attributes

Returns:

The nonnegative number of attributes in this attribute set.

get

public Attribute get(String attrID)

Description copied from interface: Attributes

Retrieves the attribute with the given attribute id from the attribute set.

Specified by:

get in interface Attributes

Parameters:

attrID - The non-null id of the attribute to retrieve. If this attribute set ignores the character case of its attribute ids, the case of attrID is ignored.

Returns:

The attribute identified by attrID; null if not found.

See Also:

Attributes.put(java.lang.String, java.lang.Object), Attributes.remove(java.lang.String)

getAll

public NamingEnumeration getAll()

Description copied from interface: Attributes

Retrieves an enumeration of the attributes in the attribute set. The effects of updates to this attribute set on this enumeration are undefined.

Specified by:

getAll in interface Attributes

Returns:

A non-null enumeration of the attributes in this attribute set. Each element of the enumeration is of class Attribute. If attribute set has zero attributes, an empty enumeration is returned.

getIDs

public NamingEnumeration getIDs()

Description copied from interface: Attributes

Retrieves an enumeration of the ids of the attributes in the attribute set. The effects of updates to this attribute set on this enumeration are undefined.

Specified by:

getIDs in interface Attributes

Returns:

A non-null enumeration of the attributes' ids in this attribute set. Each element of the enumeration is of class String. If attribute set has zero attributes, an empty enumeration is returned.

put

public Attribute put(String attrID,
                     Object val)

Description copied from interface: Attributes

Adds a new attribute to the attribute set.

Specified by:

put in interface Attributes

Parameters:

attrID - non-null The id of the attribute to add. If the attribute set ignores the character case of its attribute ids, the case of attrID is ignored.

val - The possibly null value of the attribute to add. If null, the attribute does not have any values.

Returns:

The Attribute with attrID that was previous in this attribute set; null if no such attribute existed.

See Also:

Attributes.remove(java.lang.String)

put

public Attribute put(Attribute attr)

Description copied from interface: Attributes

Adds a new attribute to the attribute set.

Specified by:

put in interface Attributes

Parameters:

attr - The non-null attribute to add. If the attribute set ignores the character case of its attribute ids, the case of attr's identifier is ignored.

Returns:

The Attribute with the same ID as attr that was previous in this attribute set; null if no such attribute existed.

See Also:

Attributes.remove(java.lang.String)

remove

public Attribute remove(String attrID)

Description copied from interface: Attributes

Removes the attribute with the attribute id 'attrID' from the attribute set. If the attribute does not exist, ignore.

Specified by:

remove in interface Attributes

Parameters:

attrID - The non-null id of the attribute to remove. If the attribute set ignores the character case of its attribute ids, the case of attrID is ignored.

Returns:

The Attribute with the same ID as attrID that was previous in the attribute set; null if no such attribute existed.

toString

public String toString()

Generates the string representation of this attribute set. The string consists of each attribute identifier and the contents of each attribute. The contents of this string is useful for debugging and is not meant to be interpreted programmatically.

Overrides:

toString in class Object

Returns:

A non-null string listing the contents of this attribute set.

equals

public boolean equals(Object obj)

Determines whether this BasicAttributes is equal to another Attributes Two Attributes are equal if they are both instances of Attributes, treat the case of attribute IDs the same way, and contain the same attributes. Each Attribute in this BasicAttributes is checked for equality using Object.equals(), which may have be overridden by implementations of Attribute). If a subclass overrides equals(), it should override hashCode() as well so that two Attributes instances that are equal have the same hash code.

Overrides:

equals in class Object

Parameters:

obj - the possibly null object to compare against.

Returns:

true If obj is equal to this BasicAttributes.

See Also:

hashCode()

hashCode

public int hashCode()

Calculates the hash code of this BasicAttributes.

The hash code is computed by adding the hash code of the attributes of this object. If this BasicAttributes ignores case of its attribute IDs, one is added to the hash code. If a subclass overrides hashCode(), it should override equals() as well so that two Attributes instances that are equal have the same hash code.

Overrides:

hashCode in class Object

Returns:

an int representing the hash code of this BasicAttributes instance.

See Also:

equals(java.lang.Object)