com.google.gwt.dev.cfg.ImmutableLibraryGroup Maven / Gradle / Ivy
/*
* Copyright 2014 Google Inc.
*
* 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 com.google.gwt.dev.cfg;
import java.util.List;
/**
* An immutable library group.
*
* Makes a good starter value for libraryGroup variables in that it allows read calling code without
* having to check for a null but will force write calling code to be guarded a condition that
* verifies that values even should be inserted.
*/
public class ImmutableLibraryGroup extends LibraryGroup {
@Override
public LibraryGroup createSubgroup(List libraryNames) {
throw new UnsupportedOperationException("ImmutableLibraryGroup does not support modification.");
}
}