/*
* Copyright 2010 The Fornax Project Team, including the original
* author or authors.
*
* Licensed 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.sculptor.framework.accessimpl.mongodb;
import java.util.Collections;
import java.util.List;
public class IdMapper implements DataMapper<Object, String> {
private final Class<?> supportedDomainObjectClass;
protected IdMapper(Class<?> domainObjectClass) {
this.supportedDomainObjectClass = domainObjectClass;
}
public static IdMapper getInstance(Class<?> domainObjectClass) {
return new IdMapper(domainObjectClass);
}
public boolean canMapToData(Class<?> domainObjectClass) {
if (domainObjectClass == null) {
return true;
}
return supportedDomainObjectClass.isAssignableFrom(domainObjectClass);
}
public String getDBCollectionName() {
throw new IllegalStateException("Not a DBCollection");
}
public String toData(Object from) {
if (from == null) {
return null;
}
Object id = IdReflectionUtil.internalGetId(from);
if (id == null) {
return null;
} else {
// TODO should it be mongoId
return String.valueOf(id);
}
}
public Object toDomain(String from) {
throw new UnsupportedOperationException(getClass().getSimpleName()
+ " cannot map toDomain, it can only map toData");
}
public List<IndexSpecification> indexes() {
return Collections.emptyList();
}
}