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## org.biojava.utils.lsid
Class LifeScienceIdentifier

    java.lang.Object
      org.biojava.utils.lsid.LifeScienceIdentifier

All Implemented Interfaces:
  Serializable

    public final class LifeScienceIdentifier

extends Object
implements Serializable

Life Science Identifier (LSID). LSID syntax:

urn:lsid:<authorityId>:<namespaceId>:<objectId>:<revisionId>

The elements of a LSID are as follows:

- authorityId = <authorityId> identifies the organization
- namespaceId = <namespaceId> namespace to scope the identifier value
- objectId = <objectId> identifier of the object within namespace
- revisionId = <revisionId> optional version information

Examples:

     urn:lsid:ebi.ac.uk:SWISS-PROT/accession:P34355:3
     urn:lsid:rcsb.org:PDB:1D4X:22
     urn:lsid:ncbi.nlm.nih.gov:Genbank/accession:NT_001063:2

As described in the memo URN Namespace for Life Science Identifiers
> http://www.i3c.org/workgroups/technical_architecture/resources/lsid/docs/LSIDSyntax9-20-02.htm

TODO:
Should this class support the spec definition of "lexical equivalence" in the equals(Object) method, or by the introduction of a new method `boolean lexicallyEquivalent(LifeScienceIdentifier)`?

From the spec:
For various purposes such as caching and replication, it's often desirable to determine if two LSIDs are the same without resolving them. The general purpose means of doing so is by testing for "lexical equivalence" as defined: LSIDs are lexically equivalent if the AuthorityID, NamespaceID, ObjectID, and RevisionID are all identical (case-insensitive comparison).

Author:
  Michael Heuer
See Also:
  Serialized Form

Method Summary
`boolean` | `equals(Object value)`
`String` | `getAuthorityId()` Return the authority id for this identifier.
`String` | `getNamespaceId()` Return the namespace id for this identifier within the authority.
`String` | `getObjectId()` Return the object id of this identifier.
`String` | `getRevisionId()` Return the revision id of this identifier.
`int` | `hashCode()`
`String` | `toString()`
`static LifeScienceIdentifier` | `valueOf(String lsid)` Create a new LifeScienceIdentifier parsed from the properly formatted string `lsid`.
`static LifeScienceIdentifier` | `valueOf(String authorityId, String namespaceId, String objectId)` Create a new LifeScienceIdentifier from the specified parameters.
`static LifeScienceIdentifier` | `valueOf(String authorityId, String namespaceId, String objectId, String revisionId)` Create a new LifeScienceIdentifier from the specified parameters.

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

Method Detail

### getAuthorityId

    public String getAuthorityId()

  Return the authority id for this identifier.

### getNamespaceId

    public String getNamespaceId()

  Return the namespace id for this identifier within the authority.

### getObjectId

    public String getObjectId()

  Return the object id of this identifier.

### getRevisionId

    public String getRevisionId()

  Return the revision id of this identifier. May return null.

### equals

    public boolean equals(Object value)

  Overrides:
    `equals` in class `Object`

### hashCode

    public int hashCode()

  Overrides:
    `hashCode` in class `Object`

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`

### valueOf

    public static LifeScienceIdentifier valueOf(String lsid)
                                         throws LifeScienceIdentifierParseException

  Create a new LifeScienceIdentifier parsed from the properly formatted string `lsid`.

  Parameters:
    `lsid` - formatted LifeScienceIdentifier string
  Throws:
    `LifeScienceIdentifierParseException` - if `lsid` is not properly formatted

### valueOf

    public static LifeScienceIdentifier valueOf(String authorityId,
                                                String namespaceId,
                                                String objectId,
                                                String revisionId)

  Create a new LifeScienceIdentifier from the specified parameters.

  Parameters:
    `authorityId` - identifies the organization
    `namespaceId` - namespace to scope the identifier value
    `objectId` - identifer of the object within namespace
    `revisionId` - optional version information
  Throws:
    `NullPointerException` - if any of `authorityId`, `namespaceId`, or `objectId` are null

### valueOf

    public static LifeScienceIdentifier valueOf(String authorityId,
                                                String namespaceId,
                                                String objectId)

  Create a new LifeScienceIdentifier from the specified parameters.

  Parameters:
    `authorityId` - identifies the organization
    `namespaceId` - namespace to scope the identifier value
    `objectId` - identifer of the object within namespace
  Throws:
    `NullPointerException` - if any of `authorityId`, `namespaceId`, or `objectId` are null

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