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build graph subjects from UriInfo when working with the http api
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fcrepo-http-api/src/main/java/org/fcrepo/api/rdf/HttpGraphSubjects.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| package org.fcrepo.api.rdf; | ||
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| import static org.fcrepo.utils.FedoraJcrTypes.FCR_CONTENT; | ||
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| import java.net.URI; | ||
| import java.util.Map; | ||
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| import javax.jcr.Node; | ||
| import javax.jcr.RepositoryException; | ||
| import javax.jcr.Session; | ||
| import javax.ws.rs.core.UriBuilder; | ||
| import javax.ws.rs.core.UriInfo; | ||
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| import org.fcrepo.api.FedoraNodes; | ||
| import org.fcrepo.rdf.GraphSubjects; | ||
| import org.fcrepo.utils.FedoraJcrTypes; | ||
| import org.modeshape.jcr.api.JcrConstants; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
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| import com.google.common.collect.ImmutableBiMap; | ||
| import com.hp.hpl.jena.rdf.model.Resource; | ||
| import com.hp.hpl.jena.rdf.model.ResourceFactory; | ||
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| public class HttpGraphSubjects implements GraphSubjects { | ||
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| private static final Logger LOGGER = | ||
| LoggerFactory.getLogger(HttpGraphSubjects.class); | ||
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| private final UriInfo uris; | ||
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| private final UriBuilder nodesBuilder; | ||
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| private final String basePath; | ||
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| private final int pathIx; | ||
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| public HttpGraphSubjects(UriInfo uris) { | ||
| this.uris = uris; | ||
| this.nodesBuilder = uris.getBaseUriBuilder().path(FedoraNodes.class); | ||
| String basePath = nodesBuilder.build("").toString(); | ||
| if (!basePath.endsWith("/")) basePath = basePath + "/"; | ||
| this.basePath = basePath; | ||
| this.pathIx = basePath.length() - 1; | ||
| LOGGER.debug("Resolving graph subjects to a base URI of \"{}\"", basePath); | ||
| } | ||
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| @Override | ||
| public Resource getGraphSubject(Node node) throws RepositoryException { | ||
| URI result = nodesBuilder | ||
| .buildFromMap(getPathMap(node)); | ||
| return ResourceFactory.createResource(result.toString()); | ||
| } | ||
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| @Override | ||
| public Node getNodeFromGraphSubject(Session session, Resource subject) | ||
| throws RepositoryException { | ||
| if (!isFedoraGraphSubject(subject)) { | ||
| return null; | ||
| } | ||
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| final String absPath = subject.getURI().substring(pathIx); | ||
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| if (absPath.endsWith(FCR_CONTENT)) { | ||
| return session.getNode(absPath.replace(FedoraJcrTypes.FCR_CONTENT, JcrConstants.JCR_CONTENT)); | ||
| } else if (session.nodeExists(absPath)) { | ||
| return session.getNode(absPath); | ||
| } else { | ||
| return null; | ||
| } | ||
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| } | ||
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| @Override | ||
| public boolean isFedoraGraphSubject(Resource subject) { | ||
| return subject.isURIResource() && subject.getURI().startsWith(basePath); | ||
| } | ||
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| private static Map<String, String> getPathMap(Node node) | ||
| throws RepositoryException { | ||
| // the path param value doesn't start with a slash | ||
| String path = node.getPath().substring(1); | ||
| if (path.endsWith(JcrConstants.JCR_CONTENT)) { | ||
| path = path.replace(JcrConstants.JCR_CONTENT, FedoraJcrTypes.FCR_CONTENT); | ||
| } | ||
| return ImmutableBiMap.of("path", path); | ||
| } | ||
| } |
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