001/** 002 * Copyright 2015 DuraSpace, Inc. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.fcrepo.kernel.modeshape.services.functions; 017 018import javax.jcr.Node; 019import javax.jcr.Property; 020import javax.jcr.Value; 021 022import org.fcrepo.kernel.modeshape.utils.UncheckedFunction; 023 024import java.util.Iterator; 025import java.util.function.Function; 026import java.util.function.Predicate; 027 028import static com.google.common.collect.Iterators.forArray; 029import static com.google.common.collect.Iterators.singletonIterator; 030import static javax.jcr.PropertyType.BINARY; 031import static org.fcrepo.kernel.modeshape.FedoraJcrConstants.FROZEN_NODE; 032import static org.modeshape.jcr.api.JcrConstants.JCR_DATA; 033import static org.fcrepo.kernel.modeshape.utils.UncheckedPredicate.uncheck; 034 035/** 036 * @author cabeer 037 * @since 9/25/14 038 */ 039public final class JcrPropertyFunctions { 040 041 private JcrPropertyFunctions() { 042 } 043 044 /** 045 * Constructs an {@link java.util.Iterator} of {@link javax.jcr.Value}s from any {@link javax.jcr.Property}, 046 * multi- or single-valued. 047 */ 048 public static Function<Property, Iterator<Value>> property2values = UncheckedFunction.uncheck( 049 (final Property p) -> p.isMultiple() ? forArray(p.getValues()) : singletonIterator(p.getValue())); 050 051 /** 052 * Check if a JCR property is a binary jcr:data property 053 */ 054 public static Predicate<Property> isBinaryContentProperty = uncheck(p -> p.getType() == BINARY && 055 p.getName().equals(JCR_DATA)); 056 057 /** 058 * Predicate for determining whether this {@link javax.jcr.Node} is a frozen node 059 * (a part of the system version history). 060 */ 061 public static Predicate<Node> isFrozen = uncheck(n -> n.isNodeType(FROZEN_NODE)); 062 063}