/*
* 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.brooklyn.core.relations;
import java.util.Collections;
import java.util.Set;
import org.apache.brooklyn.api.objs.BrooklynObject;
import org.apache.brooklyn.api.objs.BrooklynObject.RelationSupport;
import org.apache.brooklyn.api.relations.RelationshipType;
import org.apache.brooklyn.core.objs.BrooklynObjectInternal.RelationSupportInternal;
public final class EmptyRelationSupport<SourceType extends BrooklynObject> implements RelationSupportInternal<SourceType> {
final SourceType source;
public EmptyRelationSupport(SourceType source) { this.source = source; }
@Override
public Set<RelationshipType<? super SourceType, ? extends BrooklynObject>> getRelationshipTypes() {
return Collections.emptySet();
}
@Override
public <U extends BrooklynObject> Set<U> getRelations(RelationshipType<? super SourceType, U> relationship) {
return Collections.emptySet();
}
@Override
public <U extends BrooklynObject> void add(RelationshipType<? super SourceType, ? super U> relationship, U target) {
throw new UnsupportedOperationException("Relations not available on "+source);
}
@Override
public <U extends BrooklynObject> void remove(RelationshipType<? super SourceType, ? super U> relationship, U target) {
}
@Override
public RelationSupport<SourceType> getLocalBackingStore() {
throw new UnsupportedOperationException("Relations not available on "+source);
}
}