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_CONTAINS; 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.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 includes.contains(LDP_NAMESPACE + "PreferContainment"); 073 074 references = includes.contains(INBOUND_REFERENCES.toString()); 075 076 embed = includes.contains(EMBED_CONTAINS.toString()); 077 078 managedProperties = includes.contains(SERVER_MANAGED.toString()) 079 || (!omits.contains(SERVER_MANAGED.toString()) && !minimal); 080 } 081 082 /** 083 * @return Whether this prefer tag demands membership triples. 084 */ 085 public boolean prefersMembership() { 086 return membership; 087 } 088 089 /** 090 * @return Whether this prefer tag demands containment triples. 091 */ 092 public boolean prefersContainment() { 093 return containment; 094 } 095 096 /** 097 * @return Whether this prefer tag demands references triples. 098 */ 099 public boolean prefersReferences() { 100 return references; 101 } 102 /** 103 * @return Whether this prefer tag demands embedded triples. 104 */ 105 public boolean prefersEmbed() { 106 return embed; 107 } 108 /** 109 * @return Whether this prefer tag demands server managed properties. 110 */ 111 public boolean prefersServerManaged() { 112 return managedProperties; 113 } 114}