br.com.objectos.git
Class MaybeObjectId

java.lang.Object
  br.com.objectos.git.MaybeObjectId

All Implemented Interfaces:

br.com.objectos.core.object.ToStringObject

Direct Known Subclasses:

ObjectId

public abstract class MaybeObjectId
extends Object
implements br.com.objectos.core.object.ToStringObject

Represents an ObjectId or its absence.

Since:

1

Method Summary

static MaybeObjectId	empty() Returns the instance representing the absence of a hash value.
abstract ObjectId	getObjectId() Returns this reference if it is an instance of ObjectId or throws an exception otherwise.
abstract boolean	isObjectId() Returns true if this object is an instance of ObjectId.
String	toString() Returns the string representation of this id as defined by the ToStringObject.formatToString(StringBuilder, int) method.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface br.com.objectos.core.object.ToStringObject

formatToString

Method Detail

empty

public static MaybeObjectId empty()

Returns the instance representing the absence of a hash value.

Returns:

the instance representing the absence of a hash value

getObjectId

public abstract ObjectId getObjectId()

Returns this reference if it is an instance of ObjectId or throws an exception otherwise.

Returns:

this reference if it is an instance of ObjectId

Throws:

NoSuchElementException - if this object is not an ObjectId

isObjectId

public abstract boolean isObjectId()

Returns true if this object is an instance of ObjectId.

Returns:

true if this object is an instance of ObjectId

toString

public final String toString()

Returns the string representation of this id as defined by the ToStringObject.formatToString(StringBuilder, int) method.

Overrides:

toString in class Object

Returns:

the string representation of this id