package org.jtheque.updates.impl;
/*
* Copyright JTheque (Baptiste Wicht)
*
* 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.
*/
import org.jtheque.utils.annotations.Immutable;
import org.jtheque.utils.collections.CollectionUtils;
import java.util.Collection;
import java.util.NoSuchElementException;
/**
* A core descriptor.
*
* @author Baptiste Wicht
*/
@Immutable
final class CoreDescriptor {
private final Collection<CoreVersion> versions;
private final CoreVersion mostRecent;
/**
* Create a new Core descriptor.
*
* @param versions The versions of the descriptor.
*/
CoreDescriptor(Collection<CoreVersion> versions) {
super();
this.versions = CollectionUtils.protectedCopy(versions);
mostRecent = CollectionUtils.last(versions);
}
/**
* Return all the versions contained in the file.
*
* @return A list containing all the versions of the file.
*/
Collection<CoreVersion> getVersions() {
return versions;
}
/**
* Return the most recent version of the VersionsFile.
*
* @return The most recent version.
*
* @throws NoSuchElementException If the version's file contains no version.
*/
CoreVersion getMostRecentVersion() {
if (versions.isEmpty()) {
throw new NoSuchElementException("The version's file contains no versions. ");
}
return mostRecent;
}
}