Interface Name

public interface Name
extends Cloneable, Serializable, Comparable<Object>

The Name interface represents a generic name -- an ordered sequence of components. It can be a composite name (names that span multiple namespaces), or a compound name (names that are used within individual hierarchical naming systems).

There can be different implementations of Name; for example, composite names, URLs, or namespace-specific compound names.

The components of a name are numbered. The indexes of a 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 name has no components.

None of the methods in this interface accept null as a valid value for a parameter that is a name or a name component. Likewise, methods that return a name or name component never return null.

An instance of a Name may not be synchronized against concurrent multithreaded access if that access is not read-only.

Fields

serialVersionUID

static final long serialVersionUID

The class fingerprint that is set to indicate serialization compatibility with a previous version of the class.

See Also:

Constant Field Values

Methods

clone

Object clone()

Generates a new copy of this name. Subsequent changes to the components of this name will not affect the new copy, and vice versa.

Returns:

a copy of this name

See Also:

Object.clone()

compareTo

int compareTo(Object obj)

Specified by:

compareTo in interface Comparable<Object>

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 name

Throws:

ClassCastException - if obj is not a Name of a type that may be compared with this name

See Also:

Comparable.compareTo(Object)

size

int size()

Returns the number of components in this name.

Returns:

the number of components in this name

isEmpty

boolean isEmpty()

Determines whether this name is empty. An empty name is one with zero components.

Returns:

true if this name is empty, false otherwise

getAll

Enumeration<String> getAll()

Retrieves the components of this name as an enumeration of strings. The effect on the enumeration of updates to this name is undefined. If the name has zero components, an empty (non-null) enumeration is returned.

Returns:

an enumeration of the components of this name, each a string

get

String get(int posn)

Retrieves a component of this name.

Parameters:

posn - the 0-based index of the component to retrieve. Must be in the range [0,size()).

Returns:

the component at index posn

Throws:

ArrayIndexOutOfBoundsException - if posn is outside the specified range

getPrefix

Name getPrefix(int posn)

Creates a name whose components consist of a prefix of the components of this name. Subsequent changes to this name will not affect the name that is returned and vice versa.

Parameters:

posn - the 0-based index of the component at which to stop. Must be in the range [0,size()].

Returns:

a name consisting of the components at indexes in the range [0,posn).

Throws:

ArrayIndexOutOfBoundsException - if posn is outside the specified range

getSuffix

Name getSuffix(int posn)

Creates a name whose components consist of a suffix of the components in this name. Subsequent changes to this name do not affect the name that is returned and vice versa.

Parameters:

posn - the 0-based index of the component at which to start. Must be in the range [0,size()].

Returns:

a name consisting of the components at indexes in the range [posn,size()). If posn is equal to size(), an empty name is returned.

Throws:

ArrayIndexOutOfBoundsException - if posn is outside the specified range

startsWith

boolean startsWith(Name n)

Determines whether this name starts with a specified prefix. A name n is a prefix if it is equal to getPrefix(n.size()).

Parameters:

n - the name to check

Returns:

true if n is a prefix of this name, false otherwise

endsWith

boolean endsWith(Name n)

Determines whether this name ends with a specified suffix. A name n is a suffix if it is equal to getSuffix(size()-n.size()).

Parameters:

n - the name to check

Returns:

true if n is a suffix of this name, false otherwise

addAll

Name addAll(Name suffix)
     throws InvalidNameException

Adds the components of a name -- in order -- to the end of this name.

Parameters:

suffix - the components to add

Returns:

the updated name (not a new one)

Throws:

InvalidNameException - if suffix is not a valid name, or if the addition of the components would violate the syntax rules of this name

addAll

Name addAll(int posn,
            Name n)
     throws InvalidNameException

Adds the components of a name -- in order -- at a specified position within this name. Components of this name at or after the index of the first new component are shifted up (away from 0) to accommodate the new components.

Parameters:

n - the 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 name (not a new one)

Throws:

ArrayIndexOutOfBoundsException - if posn is outside the specified range

InvalidNameException - if n is not a valid name, or if the addition of the components would violate the syntax rules of this name

add

Name add(String comp)
  throws InvalidNameException

Adds a single component to the end of this name.

Parameters:

comp - the component to add

Returns:

the updated name (not a new one)

Throws:

InvalidNameException - if adding comp would violate the syntax rules of this name

add

Name add(int posn,
         String comp)
  throws InvalidNameException

Adds a single component at a specified position within this name. Components of this name at or after the index of the new component are shifted up by one (away from index 0) to accommodate the new component.

Parameters:

comp - the component to add

posn - the index at which to add the new component. Must be in the range [0,size()].

Returns:

the updated name (not a new one)

Throws:

ArrayIndexOutOfBoundsException - if posn is outside the specified range

InvalidNameException - if adding comp would violate the syntax rules of this name

remove

Object remove(int posn)
       throws InvalidNameException

Removes a component from this name. The component of this name at the specified position is removed. Components with indexes greater than this position are shifted down (toward index 0) by one.

Parameters:

posn - the index of the component to remove. Must be in the range [0,size()).

Returns:

the component removed (a String)

Throws:

ArrayIndexOutOfBoundsException - if posn is outside the specified range

InvalidNameException - if deleting the component would violate the syntax rules of the name