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.impl.services; 017 018import org.fcrepo.kernel.models.FedoraBinary; 019import org.fcrepo.kernel.exception.RepositoryRuntimeException; 020import org.fcrepo.kernel.exception.ResourceTypeException; 021import org.fcrepo.kernel.impl.FedoraBinaryImpl; 022import org.fcrepo.kernel.services.BinaryService; 023import org.slf4j.Logger; 024import org.springframework.stereotype.Component; 025 026import javax.jcr.Node; 027import javax.jcr.RepositoryException; 028import javax.jcr.Session; 029 030import static org.fcrepo.kernel.FedoraJcrTypes.FEDORA_BINARY; 031import static org.fcrepo.kernel.FedoraJcrTypes.FEDORA_NON_RDF_SOURCE_DESCRIPTION; 032import static org.fcrepo.kernel.FedoraJcrTypes.FEDORA_RESOURCE; 033import static org.modeshape.jcr.api.JcrConstants.JCR_CONTENT; 034import static org.modeshape.jcr.api.JcrConstants.NT_FILE; 035import static org.modeshape.jcr.api.JcrConstants.NT_RESOURCE; 036import static org.slf4j.LoggerFactory.getLogger; 037 038/** 039 * @author cabeer 040 * @author ajs6f 041 * @since 10/10/14 042 */ 043@Component 044public class BinaryServiceImpl extends AbstractService implements BinaryService { 045 046 private static final Logger LOGGER = getLogger(BinaryServiceImpl.class); 047 048 /** 049 * Retrieve or create a Datastream instance by pid and dsid 050 * 051 * @param path jcr path to the datastream 052 * @return datastream 053 */ 054 @Override 055 public FedoraBinary findOrCreate(final Session session, final String path) { 056 try { 057 final Node dsNode = findOrCreateNode(session, path, NT_FILE); 058 059 if (dsNode.isNew()) { 060 initializeNewDatastreamProperties(dsNode); 061 } 062 063 return cast(dsNode.getNode(JCR_CONTENT)); 064 } catch (final RepositoryException e) { 065 throw new RepositoryRuntimeException(e); 066 } 067 } 068 069 /** 070 * Retrieve a Datastream instance by pid and dsid 071 * 072 * @param path jcr path to the datastream 073 * @return datastream 074 */ 075 @Override 076 public FedoraBinary find(final Session session, final String path) { 077 try { 078 final Node dsNode = findNode(session, path); 079 080 return cast(dsNode.getNode(JCR_CONTENT)); 081 } catch (final RepositoryException e) { 082 throw new RepositoryRuntimeException(e); 083 } 084 } 085 086 private static void initializeNewDatastreamProperties(final Node node) { 087 try { 088 089 if (node.canAddMixin(FEDORA_RESOURCE)) { 090 node.addMixin(FEDORA_RESOURCE); 091 } 092 093 if (node.canAddMixin(FEDORA_NON_RDF_SOURCE_DESCRIPTION)) { 094 node.addMixin(FEDORA_NON_RDF_SOURCE_DESCRIPTION); 095 } 096 097 final Node contentNode = jcrTools.findOrCreateChild(node, JCR_CONTENT, NT_RESOURCE); 098 099 if (contentNode.canAddMixin(FEDORA_BINARY)) { 100 contentNode.addMixin(FEDORA_BINARY); 101 } 102 } catch (final RepositoryException e) { 103 LOGGER.warn("Could not decorate {} with datastream properties: {}", node, e); 104 } 105 106 } 107 /** 108 * Retrieve a Datastream instance by pid and dsid 109 * 110 * @param node datastream node 111 * @return node as datastream 112 */ 113 @Override 114 public FedoraBinary cast(final Node node) { 115 assertIsType(node); 116 return new FedoraBinaryImpl(node); 117 } 118 119 private static void assertIsType(final Node node) { 120 if (!FedoraBinaryImpl.hasMixin(node)) { 121 throw new ResourceTypeException(node + " can not be used as a binary"); 122 } 123 } 124 125 126}