| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.openjpa.meta; |
| |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.apache.openjpa.lib.util.Localizer; |
| import org.apache.openjpa.lib.util.StringDistance; |
| |
| /** |
| * Strategies for persistent value updates. |
| * |
| * @author Abe White |
| * @since 0.4.0 |
| */ |
| public class UpdateStrategies { |
| |
| /** |
| * No update strategy. |
| */ |
| public static final int NONE = 0; |
| |
| /** |
| * Ignore updates; field is always considered clean. |
| */ |
| public static final int IGNORE = 1; |
| |
| /** |
| * Throw an exception on attempt to update. |
| */ |
| public static final int RESTRICT = 2; |
| |
| private static final Localizer _loc = Localizer.forPackage |
| (UpdateStrategies.class); |
| |
| /** |
| * Convert the given strategy to a name. |
| */ |
| public static String getName(int strategy) { |
| switch (strategy) { |
| case NONE: |
| return "none"; |
| case IGNORE: |
| return "ignore"; |
| case RESTRICT: |
| return "restrict"; |
| default: |
| throw new IllegalArgumentException(String.valueOf(strategy)); |
| } |
| } |
| |
| /** |
| * Convert the given strategy name to its constant. |
| */ |
| public static int getCode(String val, Object context) { |
| if ("none".equals(val)) |
| return NONE; |
| if ("ignore".equals(val)) |
| return IGNORE; |
| if ("restrict".equals(val)) |
| return RESTRICT; |
| |
| List opts = Arrays.asList(new String[]{ "none", "ignore", "restrict" }); |
| String closest = StringDistance.getClosestLevenshteinDistance(val, |
| opts, .5F); |
| String msg; |
| if (closest != null) |
| msg = _loc.get("bad-update-strategy-hint", new Object[]{ |
| context, val, closest, opts }).getMessage(); |
| else |
| msg = _loc.get("bad-update-strategy", context, val, opts) |
| .getMessage(); |
| throw new IllegalArgumentException(msg); |
| } |
| } |