com.twelvemonkeys.util
Interface DuplicateHandler<T>

public interface DuplicateHandler<T>

DuplicateHandler

Version:

$Id: //depot/branches/personal/haraldk/twelvemonkeys/release-2/twelvemonkeys-core/src/main/java/com/twelvemonkeys/util/DuplicateHandler.java#2 $

Author:

Harald Kuhr

Field Summary

static DuplicateHandler<?>	DUPLICATES_AS_ARRAY Converts duplicats to an Object array.
static DuplicateHandler<String>	DUPLICATES_AS_CSV Converts duplicates to a comma-separated String.
static DuplicateHandler<?>	USE_FIRST_VALUE Will use the first (old) value.
static DuplicateHandler<?>	USE_LAST_VALUE Will use the last (new) value.

Method Summary

T	resolve(T pOld, T pNew) Resolves duplicates according to a certain strategy.

Field Detail

USE_FIRST_VALUE

static final DuplicateHandler<?> USE_FIRST_VALUE

Will use the first (old) value. Any new values will be discarded.

See Also:

CollectionUtil.invert(java.util.Map, java.util.Map, DuplicateHandler)

USE_LAST_VALUE

static final DuplicateHandler<?> USE_LAST_VALUE

Will use the last (new) value. Any old values will be discarded (overwritten).

See Also:

CollectionUtil.invert(java.util.Map, java.util.Map, DuplicateHandler)

DUPLICATES_AS_ARRAY

static final DuplicateHandler<?> DUPLICATES_AS_ARRAY

Converts duplicats to an Object array.

See Also:

CollectionUtil.invert(java.util.Map, java.util.Map, DuplicateHandler)

DUPLICATES_AS_CSV

static final DuplicateHandler<String> DUPLICATES_AS_CSV

Converts duplicates to a comma-separated String. Note that all values should allready be Strings if using this handler.

See Also:

CollectionUtil.invert(java.util.Map, java.util.Map, DuplicateHandler)

Method Detail

resolve

T resolve(T pOld,
          T pNew)

Resolves duplicates according to a certain strategy.

Parameters:

pOld - the old value

pNew - the new value

Returns:

the resolved value.

Throws:

IllegalArgumentException - is the arguments cannot be resolved for some reason.