| /* |
| * 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.persistence.fields; |
| |
| import java.util.Collections; |
| import java.util.EnumSet; |
| import java.util.Set; |
| |
| import javax.persistence.Entity; |
| import javax.persistence.Id; |
| import javax.persistence.Version; |
| |
| import org.apache.openjpa.persistence.Externalizer; |
| import org.apache.openjpa.persistence.Persistent; |
| |
| @Entity |
| public class EnumSetOwner { |
| |
| @Id |
| private int id; |
| |
| @Version |
| private int version; |
| |
| @Persistent |
| @Externalizer("externalizer") |
| private EnumSetHolder enumSetHolder; |
| |
| public Set<SampleEnum> getEnumSet() { |
| return Collections.unmodifiableSet(enumSetHolder.enumSet); |
| } |
| |
| public void setEnumSet(EnumSet<SampleEnum> enumSet) { |
| enumSetHolder = new EnumSetHolder(enumSet); |
| } |
| |
| public static class EnumSetHolder { |
| |
| private final EnumSet<SampleEnum> enumSet; |
| |
| public EnumSetHolder(String externalizedValue) { |
| // this implementation can only handle the special form created |
| // by the externalizer above |
| if (!"all".equals(externalizedValue)) |
| throw new IllegalStateException(externalizedValue); |
| |
| enumSet = EnumSet.allOf(SampleEnum.class); |
| } |
| |
| private EnumSetHolder(EnumSet<SampleEnum> enumSet) { |
| this.enumSet = enumSet; |
| } |
| |
| public String externalizer() { |
| // this implementation always externalizes to a special |
| // representation of all the values. |
| return "all"; |
| } |
| } |
| } |