/* | |
* 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.EnumSet; | |
import java.util.Collections; | |
import java.util.Set; | |
import javax.persistence.Id; | |
import javax.persistence.Version; | |
import javax.persistence.Entity; | |
import org.apache.openjpa.persistence.Persistent; | |
import org.apache.openjpa.persistence.Externalizer; | |
@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"; | |
} | |
} | |
} |