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.http.commons.domain.ldp; 019 020import static java.util.Arrays.asList; 021import static java.util.Optional.ofNullable; 022import static org.fcrepo.kernel.api.RdfLexicon.EMBED_CONTAINED; 023import static org.fcrepo.kernel.api.RdfLexicon.INBOUND_REFERENCES; 024import static org.fcrepo.kernel.api.RdfLexicon.LDP_NAMESPACE; 025import static org.fcrepo.kernel.api.RdfLexicon.PREFER_SERVER_MANAGED; 026 027import java.util.List; 028import java.util.Optional; 029 030import org.fcrepo.http.commons.domain.PreferTag; 031 032/** 033 * A subclass of {@link PreferTag} that contemplates the possible preferences for Linked Data Platform requests. 034 * 035 * @author ajs6f 036 */ 037public class LdpPreferTag extends PreferTag { 038 039 private final boolean membership; 040 041 private final boolean containment; 042 043 private final boolean references; 044 045 private final boolean embed; 046 047 private final boolean managedProperties; 048 049 /** 050 * Standard constructor. 051 * 052 * @param preferTag the prefer tag 053 */ 054 public LdpPreferTag(final PreferTag preferTag) { 055 super(preferTag); 056 057 final Optional<String> include = ofNullable(preferTag.getParams().get("include")); 058 final Optional<String> omit = ofNullable(preferTag.getParams().get("omit")); 059 final Optional<String> received = ofNullable(preferTag.getParams().get("received")); 060 061 final List<String> includes = asList(include.orElse(" ").split(" ")); 062 final List<String> omits = asList(omit.orElse(" ").split(" ")); 063 064 final boolean minimal = preferTag.getValue().equals("minimal") || received.orElse("").equals("minimal"); 065 066 final boolean preferMinimalContainer = includes.contains(LDP_NAMESPACE + "PreferMinimalContainer") || minimal; 067 068 membership = (!preferMinimalContainer && !omits.contains(LDP_NAMESPACE + "PreferMembership")) || 069 includes.contains(LDP_NAMESPACE + "PreferMembership"); 070 071 containment = (!preferMinimalContainer && !omits.contains(LDP_NAMESPACE + "PreferContainment") && 072 !omits.contains(PREFER_SERVER_MANAGED.toString())) 073 || includes.contains(LDP_NAMESPACE + "PreferContainment"); 074 075 references = includes.contains(INBOUND_REFERENCES.toString()); 076 077 embed = includes.contains(EMBED_CONTAINED.toString()); 078 079 managedProperties = includes.contains(PREFER_SERVER_MANAGED.toString()) 080 || (!omits.contains(PREFER_SERVER_MANAGED.toString()) && !minimal); 081 } 082 083 /** 084 * @return Whether this prefer tag demands membership triples. 085 */ 086 public boolean prefersMembership() { 087 return membership; 088 } 089 090 /** 091 * @return Whether this prefer tag demands containment triples. 092 */ 093 public boolean prefersContainment() { 094 return containment; 095 } 096 097 /** 098 * @return Whether this prefer tag demands references triples. 099 */ 100 public boolean prefersReferences() { 101 return references; 102 } 103 /** 104 * @return Whether this prefer tag demands embedded triples. 105 */ 106 public boolean prefersEmbed() { 107 return embed; 108 } 109 /** 110 * @return Whether this prefer tag demands server managed properties. 111 */ 112 public boolean prefersServerManaged() { 113 return managedProperties; 114 } 115}