BasicAttributes (Java 2 Platform SE 5.0) - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档

Overview

Package

Class

Use

Tree

Deprecated

Index

Help

Java^TM 2 Platform
Standard Ed. 5.0

PREV CLASS NEXT CLASS

FRAMES NO FRAMES

SUMMARY: NESTED | FIELD | CONSTR | METHOD

DETAIL: FIELD | CONSTR | METHOD

javax.naming.directory
Class BasicAttributes

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

All Implemented Interfaces:: Serializable, Cloneable, Attributes

public class BasicAttributes
extends Object
implements Attributes
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()
          Creates and returns a copy of this object.

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<Attribute> getAll()
          Retrieves an enumeration of the attributes in the attribute set.

NamingEnumeration<String> 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 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()` Creates and returns a copy of this object.
`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<Attribute>`	`getAll()` Retrieves an enumeration of the attributes in the attribute set.
`NamingEnumeration<String>`	`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 class: Object

Creates and returns a copy of this object. The precise meaning of "copy" may depend on the class of the object. The general intent is that, for any object x, the expression:

 x.clone() != x

will be true, and that the expression:

 x.clone().getClass() == x.getClass()

will be true, but these are not absolute requirements. While it is typically the case that:

 x.clone().equals(x)

will be true, this is not an absolute requirement.

By convention, the returned object should be obtained by calling super.clone. If a class and all of its superclasses (except Object) obey this convention, it will be the case that x.clone().getClass() == x.getClass().

By convention, the object returned by this method should be independent of this object (which is being cloned). To achieve this independence, it may be necessary to modify one or more fields of the object returned by super.clone before returning it. Typically, this means copying any mutable objects that comprise the internal "deep structure" of the object being cloned and replacing the references to these objects with references to the copies. If a class contains only primitive fields or references to immutable objects, then it is usually the case that no fields in the object returned by super.clone need to be modified.

The method clone for class Object performs a specific cloning operation. First, if the class of this object does not implement the interface Cloneable, then a CloneNotSupportedException is thrown. Note that all arrays are considered to implement the interface Cloneable. Otherwise, this method creates a new instance of the class of this object and initializes all its fields with exactly the contents of the corresponding fields of this object, as if by assignment; the contents of the fields are not themselves cloned. Thus, this method performs a "shallow copy" of this object, not a "deep copy" operation.

The class Object does not itself implement the interface Cloneable, so calling the clone method on an object whose class is Object will result in throwing an exception at run time.

Specified by:: clone in interface Attributes
Overrides:: clone in class Object

Returns:: a clone of this instance.
See Also:: Cloneable