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An implementation of the Fedora Commons repository kernel,
based on an underlying ModeShape data store:
Provides the basic abstractions at the heart of the Fedora
information architecture and machinery for manipulating them.
/*
* Copyright 2015 DuraSpace, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.fcrepo.kernel.modeshape;
import static com.hp.hpl.jena.update.UpdateAction.execute;
import static com.hp.hpl.jena.update.UpdateFactory.create;
import static java.util.Arrays.asList;
import static java.util.Collections.singleton;
import static java.util.stream.Collectors.joining;
import static java.util.stream.Collectors.toList;
import static java.util.stream.Stream.concat;
import static java.util.stream.Stream.empty;
import static java.util.stream.Stream.of;
import static org.apache.commons.codec.digest.DigestUtils.shaHex;
import static org.fcrepo.kernel.api.RdfLexicon.REPOSITORY_NAMESPACE;
import static org.fcrepo.kernel.api.RdfLexicon.isManagedNamespace;
import static org.fcrepo.kernel.api.RdfLexicon.isManagedPredicate;
import static org.fcrepo.kernel.api.RdfCollectors.toModel;
import static org.fcrepo.kernel.api.RequiredRdfContext.EMBED_RESOURCES;
import static org.fcrepo.kernel.api.RequiredRdfContext.INBOUND_REFERENCES;
import static org.fcrepo.kernel.api.RequiredRdfContext.LDP_CONTAINMENT;
import static org.fcrepo.kernel.api.RequiredRdfContext.LDP_MEMBERSHIP;
import static org.fcrepo.kernel.api.RequiredRdfContext.MINIMAL;
import static org.fcrepo.kernel.api.RequiredRdfContext.PROPERTIES;
import static org.fcrepo.kernel.api.RequiredRdfContext.SERVER_MANAGED;
import static org.fcrepo.kernel.api.RequiredRdfContext.VERSIONS;
import static org.fcrepo.kernel.modeshape.FedoraJcrConstants.JCR_CREATED;
import static org.fcrepo.kernel.modeshape.FedoraJcrConstants.JCR_LASTMODIFIED;
import static org.fcrepo.kernel.modeshape.FedoraJcrConstants.FROZEN_MIXIN_TYPES;
import static org.fcrepo.kernel.modeshape.identifiers.NodeResourceConverter.nodeConverter;
import static org.fcrepo.kernel.modeshape.rdf.JcrRdfTools.getRDFNamespaceForJcrNamespace;
import static org.fcrepo.kernel.modeshape.services.functions.JcrPropertyFunctions.isFrozen;
import static org.fcrepo.kernel.modeshape.services.functions.JcrPropertyFunctions.property2values;
import static org.fcrepo.kernel.modeshape.utils.FedoraTypesUtils.hasInternalNamespace;
import static org.fcrepo.kernel.modeshape.utils.FedoraTypesUtils.isFrozenNode;
import static org.fcrepo.kernel.modeshape.utils.FedoraTypesUtils.isInternalNode;
import static org.fcrepo.kernel.modeshape.utils.NamespaceTools.getNamespaceRegistry;
import static org.fcrepo.kernel.modeshape.utils.StreamUtils.iteratorToStream;
import static org.fcrepo.kernel.modeshape.utils.UncheckedFunction.uncheck;
import static org.modeshape.jcr.api.JcrConstants.JCR_CONTENT;
import static org.slf4j.LoggerFactory.getLogger;
import java.net.URI;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.function.Function;
import java.util.function.Predicate;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import javax.jcr.ItemNotFoundException;
import javax.jcr.Node;
import javax.jcr.PathNotFoundException;
import javax.jcr.Property;
import javax.jcr.RepositoryException;
import javax.jcr.Session;
import javax.jcr.Value;
import javax.jcr.nodetype.NodeType;
import javax.jcr.version.Version;
import javax.jcr.version.VersionHistory;
import javax.jcr.NamespaceRegistry;
import javax.jcr.version.VersionManager;
import com.google.common.base.Converter;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Iterators;
import com.hp.hpl.jena.rdf.model.Resource;
import com.hp.hpl.jena.graph.Triple;
import org.fcrepo.kernel.api.FedoraTypes;
import org.fcrepo.kernel.api.models.NonRdfSourceDescription;
import org.fcrepo.kernel.api.models.FedoraBinary;
import org.fcrepo.kernel.api.models.FedoraResource;
import org.fcrepo.kernel.api.exception.AccessDeniedException;
import org.fcrepo.kernel.api.exception.ConstraintViolationException;
import org.fcrepo.kernel.api.exception.InvalidPrefixException;
import org.fcrepo.kernel.api.exception.MalformedRdfException;
import org.fcrepo.kernel.api.exception.PathNotFoundRuntimeException;
import org.fcrepo.kernel.api.exception.RepositoryRuntimeException;
import org.fcrepo.kernel.api.identifiers.IdentifierConverter;
import org.fcrepo.kernel.modeshape.rdf.converters.PropertyConverter;
import org.fcrepo.kernel.api.TripleCategory;
import org.fcrepo.kernel.api.RdfStream;
import org.fcrepo.kernel.api.rdf.DefaultRdfStream;
import org.fcrepo.kernel.api.utils.GraphDifferencer;
import org.fcrepo.kernel.modeshape.rdf.impl.AclRdfContext;
import org.fcrepo.kernel.modeshape.rdf.impl.ChildrenRdfContext;
import org.fcrepo.kernel.modeshape.rdf.impl.ContentRdfContext;
import org.fcrepo.kernel.modeshape.rdf.impl.HashRdfContext;
import org.fcrepo.kernel.modeshape.rdf.impl.LdpContainerRdfContext;
import org.fcrepo.kernel.modeshape.rdf.impl.LdpIsMemberOfRdfContext;
import org.fcrepo.kernel.modeshape.rdf.impl.LdpRdfContext;
import org.fcrepo.kernel.modeshape.rdf.impl.ParentRdfContext;
import org.fcrepo.kernel.modeshape.rdf.impl.PropertiesRdfContext;
import org.fcrepo.kernel.modeshape.rdf.impl.TypeRdfContext;
import org.fcrepo.kernel.modeshape.rdf.impl.ReferencesRdfContext;
import org.fcrepo.kernel.modeshape.rdf.impl.RootRdfContext;
import org.fcrepo.kernel.modeshape.rdf.impl.SkolemNodeRdfContext;
import org.fcrepo.kernel.modeshape.rdf.impl.VersionsRdfContext;
import org.fcrepo.kernel.modeshape.utils.JcrPropertyStatementListener;
import org.fcrepo.kernel.modeshape.utils.UncheckedPredicate;
import org.fcrepo.kernel.modeshape.utils.iterators.RdfAdder;
import org.fcrepo.kernel.modeshape.utils.iterators.RdfRemover;
import org.modeshape.jcr.api.JcrTools;
import org.slf4j.Logger;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.sparql.modify.request.UpdateData;
import com.hp.hpl.jena.sparql.modify.request.UpdateDeleteWhere;
import com.hp.hpl.jena.sparql.modify.request.UpdateModify;
import com.hp.hpl.jena.update.UpdateRequest;
/**
* Common behaviors across {@link org.fcrepo.kernel.api.models.Container} and
* {@link org.fcrepo.kernel.api.models.NonRdfSourceDescription} types; also used
* when the exact type of an object is irrelevant
*
* @author ajs6f
*/
public class FedoraResourceImpl extends JcrTools implements FedoraTypes, FedoraResource {
private static final Logger LOGGER = getLogger(FedoraResourceImpl.class);
private static final String JCR_CHILD_VERSION_HISTORY = "jcr:childVersionHistory";
private static final String JCR_VERSIONABLE_UUID = "jcr:versionableUuid";
private static final String JCR_FROZEN_UUID = "jcr:frozenUuid";
private static final PropertyConverter propertyConverter = new PropertyConverter();
// A curried type accepting resource, translator, and "minimality", returning triples.
private static interface RdfGenerator extends Function, Function>>> {}
@SuppressWarnings("resource")
private static RdfGenerator getDefaultTriples = resource -> translator -> uncheck(minimal -> {
final Stream> min = of(
new TypeRdfContext(resource, translator),
new PropertiesRdfContext(resource, translator));
if (!minimal) {
final Stream> extra = of(
new HashRdfContext(resource, translator),
new SkolemNodeRdfContext(resource, translator));
return concat(min, extra).reduce(empty(), Stream::concat);
}
return min.reduce(empty(), Stream::concat);
});
private static RdfGenerator getEmbeddedResourceTriples = resource -> translator -> uncheck(minimal ->
resource.getChildren().flatMap(child -> child.getTriples(translator, PROPERTIES)));
private static RdfGenerator getInboundTriples = resource -> translator -> uncheck(_minimal -> {
return new ReferencesRdfContext(resource, translator);
});
private static RdfGenerator getLdpContainsTriples = resource -> translator -> uncheck(_minimal -> {
return new ChildrenRdfContext(resource, translator);
});
private static RdfGenerator getVersioningTriples = resource -> translator -> uncheck(_minimal -> {
return new VersionsRdfContext(resource, translator);
});
@SuppressWarnings("resource")
private static RdfGenerator getServerManagedTriples = resource -> translator -> uncheck(minimal -> {
if (minimal) {
return new LdpRdfContext(resource, translator);
}
final Stream> streams = of(
new LdpRdfContext(resource, translator),
new AclRdfContext(resource, translator),
new RootRdfContext(resource, translator),
new ContentRdfContext(resource, translator),
new ParentRdfContext(resource, translator));
return streams.reduce(empty(), Stream::concat);
});
@SuppressWarnings("resource")
private static RdfGenerator getLdpMembershipTriples = resource -> translator -> uncheck(_minimal -> {
final Stream> streams = of(
new LdpContainerRdfContext(resource, translator),
new LdpIsMemberOfRdfContext(resource, translator));
return streams.reduce(empty(), Stream::concat);
});
private static final Map contextMap =
ImmutableMap.builder()
.put(PROPERTIES, getDefaultTriples)
.put(VERSIONS, getVersioningTriples)
.put(EMBED_RESOURCES, getEmbeddedResourceTriples)
.put(INBOUND_REFERENCES, getInboundTriples)
.put(SERVER_MANAGED, getServerManagedTriples)
.put(LDP_MEMBERSHIP, getLdpMembershipTriples)
.put(LDP_CONTAINMENT, getLdpContainsTriples)
.build();
protected Node node;
/**
* Construct a {@link org.fcrepo.kernel.api.models.FedoraResource} from an existing JCR Node
* @param node an existing JCR node to treat as an fcrepo object
*/
public FedoraResourceImpl(final Node node) {
this.node = node;
}
/* (non-Javadoc)
* @see org.fcrepo.kernel.api.models.FedoraResource#getNode()
*/
@Override
public Node getNode() {
return node;
}
/* (non-Javadoc)
* @see org.fcrepo.kernel.api.models.FedoraResource#getPath()
*/
@Override
public String getPath() {
try {
return node.getPath();
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
/* (non-Javadoc)
* @see org.fcrepo.kernel.api.models.FedoraResource#getChildren(Boolean recursive)
*/
@Override
public Stream getChildren(final Boolean recursive) {
try {
if (recursive) {
return nodeToGoodChildren(node).flatMap(FedoraResourceImpl::getAllChildren);
}
return nodeToGoodChildren(node);
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
/**
* Get the "good" children for a node by skipping all pairtree nodes in the way.
* @param input
* @return
* @throws RepositoryException
*/
@SuppressWarnings("unchecked")
private Stream nodeToGoodChildren(final Node input) throws RepositoryException {
return iteratorToStream(input.getNodes()).filter(nastyChildren.negate())
.flatMap(uncheck((final Node child) -> child.isNodeType(FEDORA_PAIRTREE) ? nodeToGoodChildren(child) :
of(nodeToObjectBinaryConverter.convert(child))));
}
/**
* Get all children recursively, and flatten into a single Stream.
*/
private static Stream getAllChildren(final FedoraResource resource) {
return concat(of(resource), resource.getChildren().flatMap(FedoraResourceImpl::getAllChildren));
}
/**
* Children for whom we will not generate triples.
*/
private static Predicate nastyChildren = isInternalNode
.or(TombstoneImpl::hasMixin)
.or(UncheckedPredicate.uncheck(p -> p.getName().equals(JCR_CONTENT)))
.or(UncheckedPredicate.uncheck(p -> p.getName().equals("#")));
private static final Converter datastreamToBinary
= new Converter() {
@Override
protected FedoraResource doForward(final FedoraResource fedoraResource) {
if (fedoraResource instanceof NonRdfSourceDescription) {
return ((NonRdfSourceDescription) fedoraResource).getDescribedResource();
}
return fedoraResource;
}
@Override
protected FedoraResource doBackward(final FedoraResource fedoraResource) {
if (fedoraResource instanceof FedoraBinary) {
return ((FedoraBinary) fedoraResource).getDescription();
}
return fedoraResource;
}
};
private static final Converter nodeToObjectBinaryConverter
= nodeConverter.andThen(datastreamToBinary);
@Override
public FedoraResource getContainer() {
try {
if (getNode().getDepth() == 0) {
return null;
}
Node container = getNode().getParent();
while (container.getDepth() > 0) {
if (container.isNodeType(FEDORA_PAIRTREE)
|| container.isNodeType(FEDORA_NON_RDF_SOURCE_DESCRIPTION)) {
container = container.getParent();
} else {
return nodeConverter.convert(container);
}
}
return nodeConverter.convert(container);
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
@Override
public FedoraResource getChild(final String relPath) {
try {
return nodeConverter.convert(getNode().getNode(relPath));
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
@Override
public boolean hasProperty(final String relPath) {
try {
return getNode().hasProperty(relPath);
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
@Override
public void delete() {
try {
final Iterator references = node.getReferences();
final Iterator weakReferences = node.getWeakReferences();
final Iterator inboundProperties = Iterators.concat(references, weakReferences);
while (inboundProperties.hasNext()) {
final Property prop = inboundProperties.next();
final List newVals = property2values.apply(prop).filter(
UncheckedPredicate.uncheck(value ->
!node.equals(getSession().getNodeByIdentifier(value.getString()))))
.collect(toList());
if (newVals.size() == 0) {
prop.remove();
} else {
prop.setValue(newVals.toArray(new Value[newVals.size()]));
}
}
final Node parent;
if (getNode().getDepth() > 0) {
parent = getNode().getParent();
} else {
parent = null;
}
final String name = getNode().getName();
node.remove();
if (parent != null) {
createTombstone(parent, name);
}
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
private void createTombstone(final Node parent, final String path) throws RepositoryException {
findOrCreateChild(parent, path, FEDORA_TOMBSTONE);
}
/* (non-Javadoc)
* @see org.fcrepo.kernel.api.models.FedoraResource#getCreatedDate()
*/
@Override
public Date getCreatedDate() {
try {
if (hasProperty(JCR_CREATED)) {
return new Date(getProperty(JCR_CREATED).getDate().getTimeInMillis());
}
} catch (final PathNotFoundException e) {
throw new PathNotFoundRuntimeException(e);
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
LOGGER.debug("Node {} does not have a createdDate", node);
return null;
}
/* (non-Javadoc)
* @see org.fcrepo.kernel.api.models.FedoraResource#getLastModifiedDate()
*/
@Override
public Date getLastModifiedDate() {
try {
if (hasProperty(JCR_LASTMODIFIED)) {
return new Date(getProperty(JCR_LASTMODIFIED).getDate().getTimeInMillis());
}
} catch (final PathNotFoundException e) {
throw new PathNotFoundRuntimeException(e);
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
LOGGER.debug("Could not get last modified date property for node {}", node);
final Date createdDate = getCreatedDate();
if (createdDate != null) {
LOGGER.trace("Using created date for last modified date for node {}", node);
return createdDate;
}
return null;
}
@Override
public boolean hasType(final String type) {
try {
if (isFrozen.test(node) && hasProperty(FROZEN_MIXIN_TYPES)) {
return property2values.apply(getProperty(FROZEN_MIXIN_TYPES)).map(uncheck(Value::getString))
.anyMatch(type::equals);
}
return node.isNodeType(type);
} catch (final PathNotFoundException e) {
throw new PathNotFoundRuntimeException(e);
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
@Override
public List getTypes() {
try {
final List nodeTypes = new ArrayList<>();
final NodeType primaryNodeType = node.getPrimaryNodeType();
nodeTypes.add(primaryNodeType);
nodeTypes.addAll(asList(primaryNodeType.getSupertypes()));
final List mixinTypes = asList(node.getMixinNodeTypes());
nodeTypes.addAll(mixinTypes);
mixinTypes.stream()
.map(NodeType::getSupertypes)
.flatMap(Arrays::stream)
.forEach(nodeTypes::add);
final List types = nodeTypes.stream()
.map(uncheck(NodeType::getName))
.filter(hasInternalNamespace.negate())
.distinct()
.map(nodeTypeNameToURI)
.peek(x -> LOGGER.debug("node has rdf:type {}", x))
.collect(Collectors.toList());
if (isFrozenResource()) {
types.add(URI.create(REPOSITORY_NAMESPACE + "Version"));
}
return types;
} catch (final PathNotFoundException e) {
throw new PathNotFoundRuntimeException(e);
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
private final Function nodeTypeNameToURI = uncheck(name -> {
final String prefix = name.split(":")[0];
final String typeName = name.split(":")[1];
final String namespace = getSession().getWorkspace().getNamespaceRegistry().getURI(prefix);
return URI.create(getRDFNamespaceForJcrNamespace(namespace) + typeName);
});
/* (non-Javadoc)
* @see org.fcrepo.kernel.api.models.FedoraResource#updateProperties
* (org.fcrepo.kernel.api.identifiers.IdentifierConverter, java.lang.String, RdfStream)
*/
@Override
public void updateProperties(final IdentifierConverter idTranslator,
final String sparqlUpdateStatement, final RdfStream originalTriples)
throws MalformedRdfException, AccessDeniedException {
final Model model = originalTriples.collect(toModel());
final UpdateRequest request = create(sparqlUpdateStatement,
idTranslator.reverse().convert(this).toString());
final Collection errors = checkInvalidPredicates(request);
final NamespaceRegistry namespaceRegistry = getNamespaceRegistry(getSession());
request.getPrefixMapping().getNsPrefixMap().forEach(
(k,v) -> {
try {
LOGGER.debug("Prefix mapping is key:{} -> value:{}", k, v);
if (Arrays.asList(namespaceRegistry.getPrefixes()).contains(k)
&& !v.equals(namespaceRegistry.getURI(k))) {
final String namespaceURI = namespaceRegistry.getURI(k);
LOGGER.debug("Prefix has already been defined: {}:{}", k, namespaceURI);
throw new InvalidPrefixException("Prefix already exists as: " + k + " -> " + namespaceURI);
}
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
});
if (!errors.isEmpty()) {
throw new IllegalArgumentException(errors.stream().map(Exception::getMessage).collect(joining(",\n")));
}
final JcrPropertyStatementListener listener = new JcrPropertyStatementListener(
idTranslator, getSession(), idTranslator.reverse().convert(this).asNode());
model.register(listener);
model.setNsPrefixes(request.getPrefixMapping());
execute(request, model);
removeEmptyFragments();
listener.assertNoExceptions();
}
@Override
public RdfStream getTriples(final IdentifierConverter idTranslator,
final TripleCategory context) {
return getTriples(idTranslator, singleton(context));
}
@Override
public RdfStream getTriples(final IdentifierConverter idTranslator,
final Set contexts) {
return new DefaultRdfStream(idTranslator.reverse().convert(this).asNode(), contexts.stream()
.filter(contextMap::containsKey)
.map(x -> contextMap.get(x).apply(this).apply(idTranslator).apply(contexts.contains(MINIMAL)))
.reduce(empty(), Stream::concat));
}
/*
* (non-Javadoc)
* @see org.fcrepo.kernel.api.models.FedoraResource#getBaseVersion()
*/
@Override
public Version getBaseVersion() {
try {
return getVersionManager().getBaseVersion(getPath());
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
/*
* (non-Javadoc)
* @see org.fcrepo.kernel.api.models.FedoraResource#getVersionHistory()
*/
@Override
public VersionHistory getVersionHistory() {
try {
return getVersionManager().getVersionHistory(getPath());
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
/* (non-Javadoc)
* @see org.fcrepo.kernel.api.models.FedoraResource#isNew()
*/
@Override
public Boolean isNew() {
return node.isNew();
}
/* (non-Javadoc)
* @see org.fcrepo.kernel.api.models.FedoraResource#replaceProperties
* (org.fcrepo.kernel.api.identifiers.IdentifierConverter, com.hp.hpl.jena.rdf.model.Model)
*/
@Override
public void replaceProperties(final IdentifierConverter idTranslator,
final Model inputModel, final RdfStream originalTriples) throws MalformedRdfException {
try (final RdfStream replacementStream =
new DefaultRdfStream(idTranslator.reverse().convert(this).asNode())) {
final GraphDifferencer differencer =
new GraphDifferencer(inputModel, originalTriples);
final StringBuilder exceptions = new StringBuilder();
try (final DefaultRdfStream diffStream =
new DefaultRdfStream(replacementStream.topic(), differencer.difference())) {
new RdfRemover(idTranslator, getSession(), diffStream).consume();
} catch (final ConstraintViolationException e) {
throw e;
} catch (final MalformedRdfException e) {
exceptions.append(e.getMessage());
exceptions.append("\n");
}
try (final DefaultRdfStream notCommonStream =
new DefaultRdfStream(replacementStream.topic(), differencer.notCommon())) {
new RdfAdder(idTranslator, getSession(), notCommonStream).consume();
} catch (final ConstraintViolationException e) {
throw e;
} catch (final MalformedRdfException e) {
exceptions.append(e.getMessage());
}
removeEmptyFragments();
if (exceptions.length() > 0) {
throw new MalformedRdfException(exceptions.toString());
}
}
}
private void removeEmptyFragments() {
try {
if (node.hasNode("#")) {
@SuppressWarnings("unchecked")
final Iterator nodes = node.getNode("#").getNodes();
nodes.forEachRemaining(n -> {
try {
@SuppressWarnings("unchecked")
final Iterator properties = n.getProperties();
final boolean hasUserProps = iteratorToStream(properties).map(propertyConverter::convert)
.anyMatch(isManagedPredicate.negate());
final boolean hasUserTypes = Arrays.stream(n.getMixinNodeTypes())
.map(uncheck(NodeType::getName)).filter(hasInternalNamespace.negate())
.map(uncheck(type ->
getSession().getWorkspace().getNamespaceRegistry().getURI(type.split(":")[0])))
.anyMatch(isManagedNamespace.negate());
if (!hasUserProps && !hasUserTypes && !n.getWeakReferences().hasNext() &&
!n.getReferences().hasNext()) {
LOGGER.debug("Removing empty hash URI node: {}", n.getName());
n.remove();
}
} catch (final RepositoryException ex) {
throw new RepositoryRuntimeException("Error removing empty fragments", ex);
}
});
}
} catch (final RepositoryException ex) {
throw new RepositoryRuntimeException("Error removing empty fragments", ex);
}
}
/* (non-Javadoc)
* @see org.fcrepo.kernel.api.models.FedoraResource#getEtagValue()
*/
@Override
public String getEtagValue() {
final Date lastModifiedDate = getLastModifiedDate();
if (lastModifiedDate != null) {
return shaHex(getPath() + lastModifiedDate.getTime());
}
return "";
}
@Override
public void enableVersioning() {
try {
node.addMixin("mix:versionable");
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
@Override
public void disableVersioning() {
try {
node.removeMixin("mix:versionable");
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
@Override
public boolean isVersioned() {
try {
return node.isNodeType("mix:versionable");
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
@Override
public boolean isFrozenResource() {
return isFrozenNode.test(this);
}
@Override
public FedoraResource getVersionedAncestor() {
try {
if (!isFrozenResource()) {
return null;
}
Node versionableFrozenNode = getNode();
FedoraResource unfrozenResource = getUnfrozenResource();
// traverse the frozen tree looking for a node whose unfrozen equivalent is versioned
while (!unfrozenResource.isVersioned()) {
if (versionableFrozenNode.getDepth() == 0) {
return null;
}
// node in the frozen tree
versionableFrozenNode = versionableFrozenNode.getParent();
// unfrozen equivalent
unfrozenResource = new FedoraResourceImpl(versionableFrozenNode).getUnfrozenResource();
}
return new FedoraResourceImpl(versionableFrozenNode);
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
@Override
public FedoraResource getUnfrozenResource() {
if (!isFrozenResource()) {
return this;
}
try {
// Either this resource is frozen
if (hasProperty(JCR_FROZEN_UUID)) {
try {
return new FedoraResourceImpl(getNodeByProperty(getProperty(JCR_FROZEN_UUID)));
} catch (final ItemNotFoundException e) {
// The unfrozen resource has been deleted, return the tombstone.
return new TombstoneImpl(getNode());
}
// ..Or it is a child-version-history on a frozen path
} else if (hasProperty(JCR_CHILD_VERSION_HISTORY)) {
final Node childVersionHistory = getNodeByProperty(getProperty(JCR_CHILD_VERSION_HISTORY));
try {
final Node childNode = getNodeByProperty(childVersionHistory.getProperty(JCR_VERSIONABLE_UUID));
return new FedoraResourceImpl(childNode);
} catch (final ItemNotFoundException e) {
// The unfrozen resource has been deleted, return the tombstone.
return new TombstoneImpl(childVersionHistory);
}
} else {
throw new RepositoryRuntimeException("Resource must be frozen or a child-history!");
}
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
@Override
public Node getNodeVersion(final String label) {
try {
final Node n = getFrozenNode(label);
if (n != null) {
return n;
}
if (isVersioned()) {
final VersionHistory hist = getVersionManager().getVersionHistory(getPath());
if (hist.hasVersionLabel(label)) {
LOGGER.debug("Found version for {} by label {}.", this, label);
return hist.getVersionByLabel(label).getFrozenNode();
}
}
LOGGER.warn("Unknown version {} with label or uuid {}!", this, label);
return null;
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
@Override
public String getVersionLabelOfFrozenResource() {
if (!isFrozenResource()) {
return null;
}
// Version History associated with this resource
final VersionHistory versionHistory = getUnfrozenResource().getVersionHistory();
// Frozen node is required to find associated version label
final Node frozenResource;
try {
// Possibly the frozen node is nested inside of current child-version-history
if (getNode().hasProperty(JCR_CHILD_VERSION_HISTORY)) {
final Node childVersionHistory = getNodeByProperty(getProperty(JCR_CHILD_VERSION_HISTORY));
final Node childNode = getNodeByProperty(childVersionHistory.getProperty(JCR_VERSIONABLE_UUID));
final Version childVersion = getVersionManager().getBaseVersion(childNode.getPath());
frozenResource = childVersion.getFrozenNode();
} else {
frozenResource = getNode();
}
// Loop versions
@SuppressWarnings("unchecked")
final Stream versions = iteratorToStream(versionHistory.getAllVersions());
return versions
.filter(UncheckedPredicate.uncheck(version -> version.getFrozenNode().equals(frozenResource)))
.map(uncheck(versionHistory::getVersionLabels))
.flatMap(Arrays::stream)
.findFirst().orElse(null);
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
private Node getNodeByProperty(final Property property) throws RepositoryException {
return getSession().getNodeByIdentifier(property.getString());
}
protected VersionManager getVersionManager() {
try {
return getSession().getWorkspace().getVersionManager();
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
/**
* Helps ensure that there are no terminating slashes in the predicate.
* A terminating slash means ModeShape has trouble extracting the localName, e.g., for
* http://myurl.org/.
*
* @see FCREPO-1409 for details.
*/
private static Collection checkInvalidPredicates(final UpdateRequest request) {
return request.getOperations().stream()
.flatMap(x -> {
if (x instanceof UpdateModify) {
final UpdateModify y = (UpdateModify)x;
return concat(y.getInsertQuads().stream(), y.getDeleteQuads().stream());
} else if (x instanceof UpdateData) {
return ((UpdateData)x).getQuads().stream();
} else if (x instanceof UpdateDeleteWhere) {
return ((UpdateDeleteWhere)x).getQuads().stream();
} else {
return empty();
}
})
.filter(x -> x.getPredicate().isURI() && x.getPredicate().getURI().endsWith("/"))
.map(x -> new IllegalArgumentException("Invalid predicate ends with '/': " + x.getPredicate().getURI()))
.collect(Collectors.toList());
}
private Node getFrozenNode(final String label) throws RepositoryException {
try {
final Session session = getSession();
final Node frozenNode = session.getNodeByIdentifier(label);
final String baseUUID = getNode().getIdentifier();
/*
* We found a node whose identifier is the "label" for the version. Now
* we must do due dilligence to make sure it's a frozen node representing
* a version of the subject node.
*/
final Property p = frozenNode.getProperty(JCR_FROZEN_UUID);
if (p != null) {
if (p.getString().equals(baseUUID)) {
return frozenNode;
}
}
/*
* Though a node with an id of the label was found, it wasn't the
* node we were looking for, so fall through and look for a labeled
* node.
*/
} catch (final ItemNotFoundException ex) {
/*
* the label wasn't a uuid of a frozen node but
* instead possibly a version label.
*/
}
return null;
}
@Override
public boolean equals(final Object object) {
if (object instanceof FedoraResourceImpl) {
return ((FedoraResourceImpl) object).getNode().equals(this.getNode());
}
return false;
}
@Override
public int hashCode() {
return getNode().hashCode();
}
protected Session getSession() {
try {
return getNode().getSession();
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
@Override
public String toString() {
return getNode().toString();
}
protected Property getProperty(final String relPath) {
try {
return getNode().getProperty(relPath);
} catch (final RepositoryException e) {
throw new RepositoryRuntimeException(e);
}
}
}
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