Package javax.jdo.identity
Class CharIdentity
- java.lang.Object
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- javax.jdo.identity.SingleFieldIdentity
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- javax.jdo.identity.CharIdentity
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- All Implemented Interfaces:
Externalizable
,Serializable
,Comparable
public class CharIdentity extends SingleFieldIdentity
This class is for identity with a single character field.- Version:
- 2.0
- See Also:
- Serialized Form
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Field Summary
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Fields inherited from class javax.jdo.identity.SingleFieldIdentity
hashCode, keyAsObject
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Constructor Summary
Constructors Constructor Description CharIdentity()
Constructor only for Externalizable.CharIdentity(Class pcClass, char key)
Constructor with class and key.CharIdentity(Class pcClass, Character key)
Constructor with class and key.CharIdentity(Class pcClass, String str)
Constructor with class and key.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
compareTo(Object o)
Determine the ordering of identity objects.protected Object
createKeyAsObject()
Create the key as an Object.boolean
equals(Object obj)
Determine if the other object represents the same object id.char
getKey()
Return the key.void
readExternal(ObjectInput in)
Read this object.String
toString()
Return the String form of the key.void
writeExternal(ObjectOutput out)
Write this object.-
Methods inherited from class javax.jdo.identity.SingleFieldIdentity
assertKeyNotNull, compare, getKeyAsObject, getTargetClass, getTargetClassName, hashClassName, hashCode, setKeyAsObject
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Constructor Detail
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CharIdentity
public CharIdentity(Class pcClass, char key)
Constructor with class and key.- Parameters:
pcClass
- the target classkey
- the key
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CharIdentity
public CharIdentity(Class pcClass, Character key)
Constructor with class and key.- Parameters:
pcClass
- the target classkey
- the key
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CharIdentity
public CharIdentity(Class pcClass, String str)
Constructor with class and key. The String must have exactly one character.- Parameters:
pcClass
- the target classstr
- the key
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CharIdentity
public CharIdentity()
Constructor only for Externalizable.
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Method Detail
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getKey
public char getKey()
Return the key.- Returns:
- the key
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toString
public String toString()
Return the String form of the key.
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equals
public boolean equals(Object obj)
Determine if the other object represents the same object id.- Overrides:
equals
in classSingleFieldIdentity
- Parameters:
obj
- the other object- Returns:
- true if both objects represent the same object id
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compareTo
public int compareTo(Object o)
Determine the ordering of identity objects.- Parameters:
o
- Other identity- Returns:
- The relative ordering between the objects
- Since:
- 2.2
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createKeyAsObject
protected Object createKeyAsObject()
Create the key as an Object.- Overrides:
createKeyAsObject
in classSingleFieldIdentity
- Returns:
- the key as an Object
- Since:
- 2.0
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writeExternal
public void writeExternal(ObjectOutput out) throws IOException
Write this object. Write the superclass first.- Specified by:
writeExternal
in interfaceExternalizable
- Overrides:
writeExternal
in classSingleFieldIdentity
- Parameters:
out
- the output- Throws:
IOException
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readExternal
public void readExternal(ObjectInput in) throws IOException, ClassNotFoundException
Read this object. Read the superclass first.- Specified by:
readExternal
in interfaceExternalizable
- Overrides:
readExternal
in classSingleFieldIdentity
- Parameters:
in
- the input- Throws:
IOException
ClassNotFoundException
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