DuplicateKey

java.lang.Object
- java.lang.Throwable
- - java.lang.Exception
  - - java.io.IOException
    - - com.coyotegulch.jisp.DatabaseException
      - com.coyotegulch.jisp.DuplicateKey

All Implemented Interfaces:

java.io.Serializable
```
public class DuplicateKey
extends DatabaseException
```
A ObjectIndex throws a DuplicateKey when a key being added to the index is identical to a key already stored there. Each concrete index class determines the circumstances under which this exception is thrown. For example, a BTreeIndex will throw DuplicateKey when a call to the insertKey method finds an existing key that matches the insertion key; however, the BTreeIndex.writeKey method does not throw an exception for a duplicate key, instead replacing the record position associated with the extant key.

See Also:

ObjectIndex, BTreeIndex, Serialized Form

Constructor Summary

Constructors
Constructor	Description
`DuplicateKey()`	Constructs a new `DuplicateKey` with null as its error message string.
`DuplicateKey(java.lang.String message)`	Constructs a new `DuplicateKey` with `message` as its error message string.

Method Summary
- Methods inherited from class java.lang.Throwable
  addSuppressed, fillInStackTrace, getCause, getLocalizedMessage, getMessage, getStackTrace, getSuppressed, initCause, printStackTrace, printStackTrace, printStackTrace, setStackTrace, toString
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - DuplicateKey
```
public DuplicateKey()
```
    Constructs a new DuplicateKey with null as its error message string.
  - DuplicateKey
```
public DuplicateKey(java.lang.String message)
```
    Constructs a new DuplicateKey with message as its error message string.
    
    Parameters:
    
    message - Error message string.