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/**
*
* 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 com.agfa.hap.sdo;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import com.agfa.hap.sdo.implementation.SnapshotImplementation;
import com.agfa.hap.sdo.mapper.PartialDataObjectMapper;
public class DataAccessService {
private final static PartialDataObjectMapper MAPPER = new PartialDataObjectMapper();
public static Snapshot createSnapShot(SnapshotDefinition def, PartialDataObject root) {
return createSnapShot(MAPPER, def, root);
}
public static <T> Snapshot createSnapShot(DataMapper<T> mapper, SnapshotDefinition def, T root) {
List<T> roots = new ArrayList<T>(1);
roots.add(root);
return new SnapshotImplementation(mapper, def, roots);
}
@SuppressWarnings("unchecked")
public static <T> Snapshot createMultiSnapShot(SnapshotDefinition def, Collection<? extends T> root) {
return createMultiSnapShot((DataMapper<T>) MAPPER, def, root);
}
public static <T> Snapshot createMultiSnapShot(DataMapper<T> mapper, SnapshotDefinition def, Collection<? extends T> root) {
return new SnapshotImplementation(mapper, def, root);
}
public static PartialDataObject getRootObject(Snapshot s) {
return getRootObject(MAPPER, s);
}
/**
* @return The first and only root object of the snapshot. This is always a different
* instance than the object that was used to create the snapshot.
* @throws RuntimeException if there are no root objects or if there is more than one root object
*/
public static <T> T getRootObject(DataMapper<T> mapper, Snapshot s) {
List<T> roots = getRootObjects(mapper, s);
if (roots.isEmpty()){
throw new RuntimeException("snapshot is empty");
}
if (roots.size() > 1){
throw new RuntimeException("more than 1 rootobject:" + roots.size());
}
return roots.get(0);
}
public static List<PartialDataObject> getRootObjects(Snapshot s) {
return getRootObjects(MAPPER, s);
}
public static <T> List<T> getRootObjects(DataMapper<T> mapper, Snapshot s) {
return s.extract(mapper);
}
public static <T> Iterator<T> rootObjectsIterator(DataMapper<T> mapper, Snapshot s) {
return getRootObjects(mapper, s).iterator();
}
}
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