001/*
002 * Licensed to DuraSpace under one or more contributor license agreements.
003 * See the NOTICE file distributed with this work for additional information
004 * regarding copyright ownership.
005 *
006 * DuraSpace licenses this file to you under the Apache License,
007 * Version 2.0 (the "License"); you may not use this file except in
008 * compliance with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.fcrepo.kernel.modeshape.observer;
019
020import static com.google.common.collect.ImmutableSet.of;
021import static org.fcrepo.kernel.api.FedoraTypes.FEDORA_BINARY;
022import static org.fcrepo.kernel.api.FedoraTypes.FEDORA_CONTAINER;
023import static org.fcrepo.kernel.api.FedoraTypes.FEDORA_RESOURCE;
024import static org.fcrepo.kernel.modeshape.FedoraJcrConstants.ROOT;
025import static org.fcrepo.kernel.modeshape.observer.FedoraEventImpl.getResourceTypes;
026
027import javax.jcr.observation.Event;
028
029import java.util.Set;
030
031/**
032 * {@link EventFilter} that passes only events emitted from nodes with a Fedora
033 * JCR type, or properties attached to them, except in the case of a node
034 * removal. In that case, since we cannot test the node for its types, we assume
035 * that any non-JCR namespaced node is fair game.
036 *
037 * @author ajs6f
038 * @author barmintor
039 * @since Dec 2013
040 * @author eddies
041 * @since Feb 7, 2013
042 * @author escowles
043 * @since Oct 3, 2013
044 */
045public class DefaultFilter implements EventFilter {
046
047    private static final Set<String> fedoraMixins =
048            of(FEDORA_BINARY, FEDORA_CONTAINER, FEDORA_RESOURCE, ROOT);
049
050    @Override
051    public boolean test(final Event event) {
052        return getResourceTypes(event).anyMatch(fedoraMixins::contains);
053    }
054}