com.orientechnologies.orient.core.index

Interface OIndexEngine.Validator<K,V>

Type Parameters:

K - the key type.

V - the value type.

Enclosing interface:

OIndexEngine

public static interface OIndexEngine.Validator<K,V>

Put operation validator.

Field Summary

Fields

Modifier and Type	Field and Description
static Object	IGNORE Indicates that a put request should be silently ignored by the store.

Method Summary

Modifier and Type	Method and Description
Object	validate(K key, V oldValue, V newValue) Validates the put operation for the given key, the old value and the new value.

Field Detail

IGNORE

static final Object IGNORE

Indicates that a put request should be silently ignored by the store.

See Also:

validate(Object, Object, Object)

Method Detail

validate

Object validate(K key,
                V oldValue,
                V newValue)

Validates the put operation for the given key, the old value and the new value. May throw an exception to abort the current put operation with an error.

Parameters:

key - the put operation key.

oldValue - the old value or null if no value is currently stored.

newValue - the new value passed to OIndexEngine.validatedPut(Object, OIdentifiable, Validator).

Returns:

the new value to store, may differ from the passed one, or the special IGNORE value to silently ignore the put operation request being processed.