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## rice.p2p.glacier
Class FragmentKeySet

    java.lang.Object
      rice.p2p.glacier.FragmentKeySet

All Implemented Interfaces:
  java.io.Serializable, IdSet

    public class FragmentKeySet

extends java.lang.Object
implements IdSet

DESCRIBE THE CLASS

Version:
  $Id: FragmentKeySet.java 4654 2009-01-08 16:33:07Z jeffh $
Author:
  ahae
See Also:
  Serialized Form

Constructor Summary
`` | `FragmentKeySet()` Constructor.
`` | `FragmentKeySet(FragmentKeySet o)` Copy constructor.
`protected` | `FragmentKeySet(java.util.SortedMap s)` Constructor.

Method Summary
`void` | `addId(Id id)` add a member
`void` | `addMember(Id id)` add a member
`Id[]` | `asArray()` return this set as an array
`IdSet` | `build()` Returns a new, empty IdSet of this type
`java.lang.Object` | `clone()` DESCRIBE THE METHOD
`byte[]` | `getHash()` compute a fingerprint of the members in this IdSet
`java.util.Iterator<Id>` | `getIterator()` return an iterator over the elements of this set
`byte[]` | `hash()` return a hash of this set
`boolean` | `isMember(Id id)` test membership
`boolean` | `isMemberId(Id id)` test membership
`FragmentKey` | `maxMember()` return the largest member id
`FragmentKey` | `minMember()` return the smallest member id
`int` | `numElements()` return the number of elements
`void` | `removeId(Id id)` remove a member
`void` | `removeMember(Id id)` remove a member
`FragmentKeySet` | `subSet(FragmentKeyRange range)` return a subset of this set, consisting of the member ids in a given range
`FragmentKeySet` | `subSet(Id from, Id to)` return a subset of this set, consisting of the member ids in a given range
`IdSet` | `subSet(IdRange range)` return a subset of this set, consisting of the member ids in a given range
`java.lang.String` | `toString()` Returns a string representation of the IdSet.

Methods inherited from class java.lang.Object
`equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### FragmentKeySet

    public FragmentKeySet()

  Constructor.

### FragmentKeySet

    public FragmentKeySet(FragmentKeySet o)

  Copy constructor. constructs a shallow copy of the given IdSet o.

  Parameters:
    `o` - the IdSet to copy

### FragmentKeySet

    protected FragmentKeySet(java.util.SortedMap s)

  Constructor. constructs a shallow copy of the given TreeSet s.

  Parameters:
    `s` - the TreeSet based on which we construct a new IdSet

Method Detail

### isMember

    public boolean isMember(Id id)

  test membership

  Parameters:
    `id` - the id to test
  Returns:
    true of id is a member, false otherwise

### getIterator

    public java.util.Iterator<Id> getIterator()

  return an iterator over the elements of this set

  Specified by:
    `getIterator` in interface `IdSet`
  Returns:
    the interator

### getHash

    public byte[] getHash()

  compute a fingerprint of the members in this IdSet

  Returns:
    an Id containing the secure hash of this set

### isMemberId

    public boolean isMemberId(Id id)

  test membership

  Specified by:
    `isMemberId` in interface `IdSet`
  Parameters:
    `id` - the id to test
  Returns:
    true of id is a member, false otherwise

### numElements

    public int numElements()

  return the number of elements

  Specified by:
    `numElements` in interface `IdSet`
  Returns:
    DESCRIBE THE RETURN VALUE

### addMember

    public void addMember(Id id)

  add a member

  Parameters:
    `id` - the id to add

### removeMember

    public void removeMember(Id id)

  remove a member

  Parameters:
    `id` - the id to remove

### minMember

    public FragmentKey minMember()

  return the smallest member id

  Returns:
    the smallest id in the set

### maxMember

    public FragmentKey maxMember()

  return the largest member id

  Returns:
    the largest id in the set

### subSet

    public FragmentKeySet subSet(Id from,
                                 Id to)

  return a subset of this set, consisting of the member ids in a given range

  Parameters:
    `from` - the counterclockwise end of the range (inclusive)
    `to` - the clockwise end of the range (exclusive)
  Returns:
    the subset

### subSet

    public FragmentKeySet subSet(FragmentKeyRange range)

  return a subset of this set, consisting of the member ids in a given range

  Parameters:
    `range` - the range
  Returns:
    the subset

### toString

    public java.lang.String toString()

  Returns a string representation of the IdSet.

  Overrides:
    `toString` in class `java.lang.Object`
  Returns:
    DESCRIBE THE RETURN VALUE

### addId

    public void addId(Id id)

  add a member

  Specified by:
    `addId` in interface `IdSet`
  Parameters:
    `id` - the id to add

### removeId

    public void removeId(Id id)

  remove a member

  Specified by:
    `removeId` in interface `IdSet`
  Parameters:
    `id` - the id to remove

### subSet

    public IdSet subSet(IdRange range)

  return a subset of this set, consisting of the member ids in a given range

  Specified by:
    `subSet` in interface `IdSet`
  Parameters:
    `range` - DESCRIBE THE PARAMETER
  Returns:
    the subset

### hash

    public byte[] hash()

  return a hash of this set

  Specified by:
    `hash` in interface `IdSet`
  Returns:
    the hash of this set

### clone

    public java.lang.Object clone()

  DESCRIBE THE METHOD

  Specified by:
    `clone` in interface `IdSet`
  Overrides:
    `clone` in class `java.lang.Object`
  Returns:
    DESCRIBE THE RETURN VALUE

### build

    public IdSet build()

  Returns a new, empty IdSet of this type

  Specified by:
    `build` in interface `IdSet`
  Returns:
    A new IdSet

### asArray

    public Id[] asArray()

  return this set as an array

  Specified by:
    `asArray` in interface `IdSet`
  Returns:
    the array

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