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.services.functions;
019
020import javax.jcr.Node;
021import javax.jcr.Property;
022import javax.jcr.Value;
023
024import org.fcrepo.kernel.modeshape.utils.UncheckedFunction;
025
026import java.util.function.Function;
027import java.util.function.Predicate;
028import java.util.stream.Stream;
029
030import static java.util.stream.Stream.of;
031import static javax.jcr.PropertyType.BINARY;
032import static org.fcrepo.kernel.modeshape.FedoraJcrConstants.FROZEN_NODE;
033import static org.modeshape.jcr.api.JcrConstants.JCR_DATA;
034import static org.fcrepo.kernel.modeshape.utils.UncheckedPredicate.uncheck;
035
036/**
037 * @author cabeer
038 * @since 9/25/14
039 */
040public final class JcrPropertyFunctions {
041
042    private JcrPropertyFunctions() {
043    }
044
045    /**
046     * Constructs an {@link java.util.stream.Stream} of {@link javax.jcr.Value}s from any {@link javax.jcr.Property},
047     * multi- or single-valued.
048     */
049    public static Function<Property, Stream<Value>> property2values = UncheckedFunction.uncheck(
050            (final Property p) -> p.isMultiple() ? of(p.getValues()) : of(p.getValue()));
051
052    /**
053     * Check if a JCR property is a binary jcr:data property
054     */
055    public static Predicate<Property> isBinaryContentProperty = uncheck(p -> p.getType() == BINARY &&
056            p.getName().equals(JCR_DATA));
057
058    /**
059     * Predicate for determining whether this {@link javax.jcr.Node} is a frozen node
060     * (a part of the system version history).
061     */
062    public static Predicate<Node> isFrozen = uncheck(n -> n.isNodeType(FROZEN_NODE));
063
064}