| JavaTM 2 Platform Std. Ed. v1.6.0
javax.naming
Class CompositeName
java.lang.Object
 javax.naming.CompositeName
- All Implemented Interfaces:
- Serializable, Cloneable, Comparable<Object>, Name
public class CompositeName - extends Object
- implements Name
This class represents a composite name -- a sequence of
component names spanning multiple namespaces.
Each component is a string name from the namespace of a
naming system. If the component comes from a hierarchical
namespace, that component can be further parsed into
its atomic parts by using the CompoundName class.
The components of a composite name are numbered. The indexes of a
composite name with N components range from 0 up to, but not including, N.
This range may be written as [0,N).
The most significant component is at index 0.
An empty composite name has no components.
JNDI Composite Name Syntax
JNDI defines a standard string representation for composite names. This
representation is the concatenation of the components of a composite name
from left to right using the component separator (a forward
slash character (/)) to separate each component.
The JNDI syntax defines the following meta characters:
- escape (backward slash \),
- quote characters (single (') and double quotes (")), and
- component separator (forward slash character (/)).
Any occurrence of a leading quote, an escape preceding any meta character,
an escape at the end of a component, or a component separator character
in an unquoted component must be preceded by an escape character when
that component is being composed into a composite name string.
Alternatively, to avoid adding escape characters as described,
the entire component can be quoted using matching single quotes
or matching double quotes. A single quote occurring within a double-quoted
component is not considered a meta character (and need not be escaped),
and vice versa.
When two composite names are compared, the case of the characters
is significant.
A leading component separator (the composite name string begins with
a separator) denotes a leading empty component (a component consisting
of an empty string).
A trailing component separator (the composite name string ends with
a separator) denotes a trailing empty component.
Adjacent component separators denote an empty component.
Composite Name Examples
This table shows examples of some composite names. Each row shows
the string form of a composite name and its corresponding structural form
(CompositeName).
| String Name |
CompositeName |
|
""
|
{} (the empty name == new CompositeName("") == new CompositeName())
|
|
"x"
|
{"x"}
|
|
"x/y"
|
{"x", "y"} |
| "x/" |
{"x", ""} |
| "/x" |
{"", "x"} |
| "/" |
{""} |
| "//" |
{"", ""} |
| "/x/" |
{"", "x", ""} |
| "x//y" |
{"x", "", "y"} |
Composition Examples
Here are some composition examples. The right column shows composing
string composite names while the left column shows composing the
corresponding CompositeNames. Notice that composing the
string forms of two composite names simply involves concatenating
their string forms together.
| String Names |
CompositeNames |
|
"x/y" + "/" = x/y/
|
{"x", "y"} + {""} = {"x", "y", ""}
|
|
"" + "x" = "x"
|
{} + {"x"} = {"x"}
|
|
"/" + "x" = "/x"
|
{""} + {"x"} = {"", "x"}
|
|
"x" + "" + "" = "x"
|
{"x"} + {} + {} = {"x"}
|
Multithreaded Access
A CompositeName instance is not synchronized against concurrent
multithreaded access. Multiple threads trying to access and modify a
CompositeName should lock the object.
- Since:
- 1.3
- See Also:
- Serialized Form
|
Constructor Summary |
|
CompositeName()
Constructs a new empty composite name. |
protected |
CompositeName(Enumeration<String> comps)
Constructs a new composite name instance using the components
specified by 'comps'. |
|
CompositeName(String n)
Constructs a new composite name instance by parsing the string n
using the composite name syntax (left-to-right, slash separated). |
|
Method Summary |
Name |
add(int posn,
String comp)
Adds a single component at a specified position within this
composite name. |
Name |
add(String comp)
Adds a single component to the end of this composite name. |
Name |
addAll(int posn,
Name n)
Adds the components of a composite name -- in order -- at a specified
position within this composite name. |
Name |
addAll(Name suffix)
Adds the components of a composite name -- in order -- to the end of
this composite name. |
Object |
clone()
Generates a copy of this composite name. |
int |
compareTo(Object obj)
Compares this CompositeName with the specified Object for order. |
boolean |
endsWith(Name n)
Determines whether a composite name is a suffix of this composite name. |
boolean |
equals(Object obj)
Determines whether two composite names are equal. |
String |
get(int posn)
Retrieves a component of this composite name. |
Enumeration<String> |
getAll()
Retrieves the components of this composite name as an enumeration
of strings. |
Name |
getPrefix(int posn)
Creates a composite name whose components consist of a prefix of the
components in this composite name. |
Name |
getSuffix(int posn)
Creates a composite name whose components consist of a suffix of the
components in this composite name. |
int |
hashCode()
Computes the hash code of this composite name. |
boolean |
isEmpty()
Determines whether this composite name is empty. |
Object |
remove(int posn)
Deletes a component from this composite name. |
int |
size()
Retrieves the number of components in this composite name. |
boolean |
startsWith(Name n)
Determines whether a composite name is a prefix of this composite name. |
String |
toString()
Generates the string representation of this composite name. |
CompositeName
protected CompositeName(Enumeration<String> comps)
- Constructs a new composite name instance using the components
specified by 'comps'. This protected method is intended to be
to be used by subclasses of CompositeName when they override
methods such as clone(), getPrefix(), getSuffix().
- Parameters:
comps - A non-null enumeration containing the components for the new
composite name. Each element is of class String.
The enumeration will be consumed to extract its
elements.
CompositeName
public CompositeName(String n)
throws InvalidNameException
- Constructs a new composite name instance by parsing the string n
using the composite name syntax (left-to-right, slash separated).
The composite name syntax is described in detail in the class
description.
- Parameters:
n - The non-null string to parse.
- Throws:
InvalidNameException - If n has invalid composite name syntax.
CompositeName
public CompositeName()
- Constructs a new empty composite name. Such a name returns true
when
isEmpty() is invoked on it.
toString
public String toString()
- Generates the string representation of this composite name.
The string representation consists of enumerating in order
each component of the composite name and separating
each component by a forward slash character. Quoting and
escape characters are applied where necessary according to
the JNDI syntax, which is described in the class description.
An empty component is represented by an empty string.
The string representation thus generated can be passed to
the CompositeName constructor to create a new equivalent
composite name.
- Overrides:
toString in class Object
- Returns:
- A non-null string representation of this composite name.
equals
public boolean equals(Object obj)
- Determines whether two composite names are equal.
If obj is null or not a composite name, false is returned.
Two composite names are equal if each component in one is equal
to the corresponding component in the other. This implies
both have the same number of components, and each component's
equals() test against the corresponding component in the other name
returns true.
- Overrides:
equals in class Object
- Parameters:
obj - The possibly null object to compare against.
- Returns:
- true if obj is equal to this composite name, false otherwise.
- See Also:
hashCode()
hashCode
public int hashCode()
- Computes the hash code of this composite name.
The hash code is the sum of the hash codes of individual components
of this composite name.
- Overrides:
hashCode in class Object
- Returns:
- An int representing the hash code of this name.
- See Also:
equals(java.lang.Object)
compareTo
public int compareTo(Object obj)
- Compares this CompositeName with the specified Object for order.
Returns a
negative integer, zero, or a positive integer as this Name is less
than, equal to, or greater than the given Object.
If obj is null or not an instance of CompositeName, ClassCastException
is thrown.
See equals() for what it means for two composite names to be equal.
If two composite names are equal, 0 is returned.
Ordering of composite names follows the lexicographical rules for
string comparison, with the extension that this applies to all
the components in the composite name. The effect is as if all the
components were lined up in their specified ordered and the
lexicographical rules applied over the two line-ups.
If this composite name is "lexicographically" lesser than obj,
a negative number is returned.
If this composite name is "lexicographically" greater than obj,
a positive number is returned.
- Specified by:
compareTo in interface Comparable<Object>- Specified by:
compareTo in interface Name
- Parameters:
obj - The non-null object to compare against.
- Returns:
- a negative integer, zero, or a positive integer as this Name
is less than, equal to, or greater than the given Object.
- Throws:
ClassCastException - if obj is not a CompositeName.- See Also:
Comparable.compareTo(Object)
clone
public Object clone()
- Generates a copy of this composite name.
Changes to the components of this composite name won't
affect the new copy and vice versa.
- Specified by:
clone in interface Name- Overrides:
clone in class Object
- Returns:
- A non-null copy of this composite name.
- See Also:
Cloneable
size
public int size()
- Retrieves the number of components in this composite name.
- Specified by:
size in interface Name
- Returns:
- The nonnegative number of components in this composite name.
isEmpty
public boolean isEmpty()
- Determines whether this composite name is empty. A composite name
is empty if it has zero components.
- Specified by:
isEmpty in interface Name
- Returns:
- true if this composite name is empty, false otherwise.
getAll
public Enumeration<String> getAll()
- Retrieves the components of this composite name as an enumeration
of strings.
The effects of updates to this composite name on this enumeration
is undefined.
- Specified by:
getAll in interface Name
- Returns:
- A non-null enumeration of the components of
this composite name. Each element of the enumeration is of
class String.
get
public String get(int posn)
- Retrieves a component of this composite name.
- Specified by:
get in interface Name
- Parameters:
posn - The 0-based index of the component to retrieve.
Must be in the range [0,size()).
- Returns:
- The non-null component at index posn.
- Throws:
ArrayIndexOutOfBoundsException - if posn is outside the
specified range.
getPrefix
public Name getPrefix(int posn)
- Creates a composite name whose components consist of a prefix of the
components in this composite name. Subsequent changes to
this composite name does not affect the name that is returned.
- Specified by:
getPrefix in interface Name
- Parameters:
posn - The 0-based index of the component at which to stop.
Must be in the range [0,size()].
- Returns:
- A composite name consisting of the components at indexes in
the range [0,posn).
- Throws:
ArrayIndexOutOfBoundsException - If posn is outside the specified range.
getSuffix
public Name getSuffix(int posn)
- Creates a composite name whose components consist of a suffix of the
components in this composite name. Subsequent changes to
this composite name does not affect the name that is returned.
- Specified by:
getSuffix in interface Name
- Parameters:
posn - The 0-based index of the component at which to start.
Must be in the range [0,size()].
- Returns:
- A composite name consisting of the components at indexes in
the range [posn,size()). If posn is equal to
size(), an empty composite name is returned.
- Throws:
ArrayIndexOutOfBoundsException - If posn is outside the specified range.
startsWith
public boolean startsWith(Name n)
- Determines whether a composite name is a prefix of this composite name.
A composite name 'n' is a prefix if it is equal to
getPrefix(n.size())--in other words, this composite name
starts with 'n'. If 'n' is null or not a composite name, false is returned.
- Specified by:
startsWith in interface Name
- Parameters:
n - The possibly null name to check.
- Returns:
- true if n is a CompositeName and
is a prefix of this composite name, false otherwise.
endsWith
public boolean endsWith(Name n)
- Determines whether a composite name is a suffix of this composite name.
A composite name 'n' is a suffix if it it is equal to
getSuffix(size()-n.size())--in other words, this
composite name ends with 'n'.
If n is null or not a composite name, false is returned.
- Specified by:
endsWith in interface Name
- Parameters:
n - The possibly null name to check.
- Returns:
- true if n is a CompositeName and
is a suffix of this composite name, false otherwise.
addAll
public Name addAll(Name suffix)
throws InvalidNameException
- Adds the components of a composite name -- in order -- to the end of
this composite name.
- Specified by:
addAll in interface Name
- Parameters:
suffix - The non-null components to add.
- Returns:
- The updated CompositeName, not a new one. Cannot be null.
- Throws:
InvalidNameException - If suffix is not a composite name.
addAll
public Name addAll(int posn,
Name n)
throws InvalidNameException
- Adds the components of a composite name -- in order -- at a specified
position within this composite name.
Components of this composite name at or after the index of the first
new component are shifted up (away from index 0)
to accommodate the new components.
- Specified by:
addAll in interface Name
- Parameters:
n - The non-null components to add.posn - The index in this name at which to add the new
components. Must be in the range [0,size()].
- Returns:
- The updated CompositeName, not a new one. Cannot be null.
- Throws:
InvalidNameException - If n is not a composite name.
ArrayIndexOutOfBoundsException - If posn is outside the specified range.
add
public Name add(String comp)
throws InvalidNameException
- Adds a single component to the end of this composite name.
- Specified by:
add in interface Name
- Parameters:
comp - The non-null component to add.
- Returns:
- The updated CompositeName, not a new one. Cannot be null.
- Throws:
InvalidNameException - If adding comp at end of the name
would violate the name's syntax.
add
public Name add(int posn,
String comp)
throws InvalidNameException
- Adds a single component at a specified position within this
composite name.
Components of this composite name at or after the index of the new
component are shifted up by one (away from index 0) to accommodate
the new component.
- Specified by:
add in interface Name
- Parameters:
comp - The non-null component to add.posn - The index at which to add the new component.
Must be in the range [0,size()].
- Returns:
- The updated CompositeName, not a new one. Cannot be null.
- Throws:
ArrayIndexOutOfBoundsException - If posn is outside the specified range.
InvalidNameException - If adding comp at the specified position
would violate the name's syntax.
remove
public Object remove(int posn)
throws InvalidNameException
- Deletes a component from this composite name.
The component of this composite name at position 'posn' is removed,
and components at indices greater than 'posn'
are shifted down (towards index 0) by one.
- Specified by:
remove in interface Name
- Parameters:
posn - The index of the component to delete.
Must be in the range [0,size()).
- Returns:
- The component removed (a String).
- Throws:
ArrayIndexOutOfBoundsException - If posn is outside the specified range (includes case where
composite name is empty).
InvalidNameException - If deleting the component
would violate the name's syntax.
Copyright 2003 Sun Microsystems, Inc. All rights reserved
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