| /* |
| * 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 org.apache.openjpa.conf.OpenJPAConfiguration; |
| import org.apache.openjpa.lib.util.Localizer; |
| import org.apache.openjpa.lib.util.StringDistance; |
| import org.apache.openjpa.lib.util.collections.TreeBidiMap; |
| import org.apache.openjpa.util.MetaDataException; |
| |
| /** |
| * Strategies for persistent value generation. |
| * |
| * @author Abe White |
| * @since 0.4.0 |
| */ |
| public class ValueStrategies { |
| |
| /** |
| * No value strategy. |
| */ |
| public static final int NONE = 0; |
| |
| /** |
| * "native" value strategy. |
| */ |
| public static final int NATIVE = 1; |
| |
| /** |
| * "sequence" value strategy. |
| */ |
| public static final int SEQUENCE = 2; |
| |
| /** |
| * "autoassigned" value strategy. |
| */ |
| public static final int AUTOASSIGN = 3; |
| |
| /** |
| * "increment" value strategy. |
| */ |
| public static final int INCREMENT = 4; |
| |
| /** |
| * "uuid-string" value strategy. |
| */ |
| public static final int UUID_STRING = 5; |
| |
| /** |
| * "uuid-hex" value strategy. |
| */ |
| public static final int UUID_HEX = 6; |
| |
| /** |
| * "uuid-type4-string" value strategy. |
| */ |
| public static final int UUID_TYPE4_STRING = 7; |
| |
| /** |
| * "uuid-type4-hex" value strategy. |
| */ |
| public static final int UUID_TYPE4_HEX = 8; |
| |
| private static final Localizer _loc = Localizer.forPackage |
| (ValueStrategies.class); |
| |
| // table of names and strategies |
| private static final TreeBidiMap _map = new TreeBidiMap(); |
| |
| static { |
| _map.put("none", NONE); |
| _map.put("native", NATIVE); |
| _map.put("sequence", SEQUENCE); |
| _map.put("autoassign", AUTOASSIGN); |
| _map.put("increment", INCREMENT); |
| _map.put("uuid-string", UUID_STRING); |
| _map.put("uuid-hex", UUID_HEX); |
| _map.put("uuid-type4-string", UUID_TYPE4_STRING); |
| _map.put("uuid-type4-hex", UUID_TYPE4_HEX); |
| } |
| |
| /** |
| * Convert the given strategy to a name. |
| */ |
| public static String getName(int strategy) { |
| Object code = strategy; |
| String name = (String) _map.getKey(code); |
| if (name != null) |
| return name; |
| throw new IllegalArgumentException(code.toString()); |
| } |
| |
| /** |
| * Convert the given strategy name to its constant. |
| */ |
| public static int getCode(String val, Object context) { |
| if (val == null) |
| return NONE; |
| Object code = _map.get(val); |
| if (code != null) |
| return ((Number) code).intValue(); |
| |
| // not a recognized strategy; check for typo |
| String closest = StringDistance.getClosestLevenshteinDistance(val, |
| _map.keySet(), .5F); |
| String msg; |
| if (closest != null) |
| msg = _loc.get("bad-value-strategy-hint", new Object[]{ |
| context, val, closest, _map.keySet() }).getMessage(); |
| else |
| msg = _loc.get("bad-value-strategy", context, val, _map.keySet()) |
| .getMessage(); |
| throw new IllegalArgumentException(msg); |
| } |
| |
| /** |
| * Assert that the given strategy is supported by the current runtime. |
| */ |
| public static void assertSupported(int strategy, MetaDataContext context, |
| String attributeName) { |
| OpenJPAConfiguration conf = context.getRepository().getConfiguration(); |
| boolean supported = true; |
| switch (strategy) { |
| case AUTOASSIGN: |
| supported = conf.supportedOptions().contains |
| (OpenJPAConfiguration.OPTION_VALUE_AUTOASSIGN); |
| break; |
| case INCREMENT: |
| supported = conf.supportedOptions().contains |
| (OpenJPAConfiguration.OPTION_VALUE_INCREMENT); |
| break; |
| case NATIVE: |
| supported = context instanceof ClassMetaData; |
| break; |
| } |
| if (!supported) |
| throw new MetaDataException(_loc.get("unsupported-value-strategy", |
| context, getName(strategy), attributeName)); |
| } |
| } |