/*
* ChoiceAuthority.java
*
* Version: $Revision: 3705 $
*
* Date: $Date: 2009-04-11 13:02:24 -0400 (Sat, 11 Apr 2009) $
*
* Copyright (c) 2002-2009, The DSpace Foundation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of the DSpace Foundation nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
package org.dspace.content.authority;
/**
* Plugin interface that supplies an authority control mechanism for
* one metadata field.
*
* @author Larry Stone
* @see ChoiceAuthorityManager, MetadataAuthorityManager
*/
public interface ChoiceAuthority
{
/**
* Get all values from the authority that match the proferred value.
* Note that the offering was entered by the user and may contain
* mixed/incorrect case, whitespace, etc so the plugin should be careful
* to clean up user data before making comparisons.
*
* Value of a "Name" field will be in canonical DSpace person name format,
* which is "Lastname, Firstname(s)", e.g. "Smith, John Q.".
*
* Some authorities with a small set of values may simply return the whole
* set for any sample value, although it's a good idea to set the
* defaultSelected index in the Choices instance to the choice, if any,
* that matches the value.
*
* @param text user's value to match
* @param collection database ID of Collection for context (owner of Item)
* @param start choice at which to start, 0 is first.
* @param limit maximum number of choices to return, 0 for no limit.
* @param locale explicit localization key if available, or null
* @return a Choices object (never null).
*/
public Choices getMatches(String text, int collection, int start, int limit, String locale);
/**
* Get the single "best" match (if any) of a value in the authority
* to the given user value. The "confidence" element of Choices is
* expected to be set to a meaningful value about the circumstances of
* this match.
*
* This call is typically used in non-interactive metadata ingest
* where there is no interactive agent to choose from among options.
*
* @param text user's value to match
* @param collection database ID of Collection for context (owner of Item)
* @param locale explicit localization key if available, or null
* @return a Choices object (never null) with 1 or 0 values.
*/
public Choices getBestMatch(String text, int collection, String locale);
/**
* Get the canonical user-visible "label" (i.e. short descriptive text)
* for a key in the authority. Can be localized given the implicit
* or explicit locale specification.
*
* This may get called many times while populating a Web page so it should
* be implemented as efficiently as possible.
*
* @param key authority key known to this authority.
* @param locale explicit localization key if available, or null
* @return descriptive label - should always return something, never null.
*/
public String getLabel(String key, String locale);
}