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Creating new PrefixingIdentifierTranslator and making DefaultIdentifi…
…erTranslator extend from that
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144 changes: 144 additions & 0 deletions
144
...nel-impl/src/main/java/org/fcrepo/kernel/impl/rdf/impl/PrefixingIdentifierTranslator.java
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| /** | ||
| * 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.impl.rdf.impl; | ||
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| import static com.google.common.collect.Lists.newArrayList; | ||
| import static com.hp.hpl.jena.rdf.model.ResourceFactory.createResource; | ||
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| import com.google.common.base.Converter; | ||
| import com.google.common.collect.Lists; | ||
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| import org.fcrepo.kernel.models.FedoraResource; | ||
| import org.fcrepo.kernel.exception.RepositoryRuntimeException; | ||
| import org.fcrepo.kernel.identifiers.IdentifierConverter; | ||
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| import com.hp.hpl.jena.rdf.model.Resource; | ||
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| import org.fcrepo.kernel.impl.identifiers.HashConverter; | ||
| import org.fcrepo.kernel.impl.identifiers.NamespaceConverter; | ||
| import org.fcrepo.kernel.impl.identifiers.NodeResourceConverter; | ||
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| import javax.jcr.RepositoryException; | ||
| import javax.jcr.Session; | ||
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| import java.util.List; | ||
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| /** | ||
| * A very simple {@link IdentifierConverter} which translates JCR paths into Fedora subjects with | ||
| * a configurable resource namespace (e.g., a baseURL). When a REST API context is available for | ||
| * constructing URIs, {@link HttpResourceConverter} should be used instead. | ||
| * | ||
| * @author barmintor | ||
| * @author ajs6f | ||
| * @author escowles | ||
| * @since 2015-04-24 | ||
| */ | ||
| public class PrefixingIdentifierTranslator extends IdentifierConverter<Resource, FedoraResource> { | ||
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| private static final NodeResourceConverter nodeResourceConverter = new NodeResourceConverter(); | ||
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| private final String resourceNamespace; | ||
| private final Session session; | ||
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| /** | ||
| * Construct the graph with the provided resource namespace, which will translate JCR paths into | ||
| * URIs prefixed with that namespace. Should only be used when a REST API context is not available | ||
| * for constructing URIs. | ||
| * @param session Session to lookup nodes | ||
| * @param resourceNamespace Resource namespace (i.e., base URL) | ||
| **/ | ||
| public PrefixingIdentifierTranslator(final Session session, final String resourceNamespace) { | ||
| this.session = session; | ||
| this.resourceNamespace = resourceNamespace; | ||
| setTranslationChain(); | ||
| } | ||
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| protected Converter<String, String> forward = identity(); | ||
| protected Converter<String, String> reverse = identity(); | ||
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| private void setTranslationChain() { | ||
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| for (final Converter<String, String> t : minimalTranslationChain) { | ||
| forward = forward.andThen(t); | ||
| } | ||
| for (final Converter<String, String> t : Lists.reverse(minimalTranslationChain)) { | ||
| reverse = reverse.andThen(t.reverse()); | ||
| } | ||
| } | ||
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| @SuppressWarnings("unchecked") | ||
| private static final List<Converter<String, String>> minimalTranslationChain = | ||
| newArrayList((Converter<String, String>) new NamespaceConverter(), | ||
| (Converter<String, String>) new HashConverter() | ||
| ); | ||
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| @Override | ||
| protected FedoraResource doForward(final Resource subject) { | ||
| try { | ||
| if (!inDomain(subject)) { | ||
| throw new RepositoryRuntimeException("Subject " + subject + " is not in this repository"); | ||
| } | ||
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| return nodeResourceConverter.convert(session.getNode(asString(subject))); | ||
| } catch (final RepositoryException e) { | ||
| throw new RepositoryRuntimeException(e); | ||
| } | ||
| } | ||
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| @Override | ||
| protected Resource doBackward(final FedoraResource resource) { | ||
| final String absPath = resource.getPath(); | ||
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| return toDomain(absPath); | ||
| } | ||
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| @Override | ||
| public boolean inDomain(final Resource subject) { | ||
| return subject.isURIResource() && subject.getURI().startsWith(resourceNamespace); | ||
| } | ||
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| @Override | ||
| public Resource toDomain(final String absPath) { | ||
| final String relativePath; | ||
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| if (absPath.startsWith("/")) { | ||
| relativePath = absPath.substring(1); | ||
| } else { | ||
| relativePath = absPath; | ||
| } | ||
| return createResource(resourceNamespace + reverse.convert(relativePath)); | ||
| } | ||
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| @Override | ||
| public String asString(final Resource subject) { | ||
| if (!inDomain(subject)) { | ||
| return null; | ||
| } | ||
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| final String path = subject.getURI().substring(resourceNamespace.length() - 1); | ||
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| final String absPath = forward.convert(path); | ||
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| if (absPath.isEmpty()) { | ||
| return "/"; | ||
| } | ||
| return absPath; | ||
| } | ||
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| } |
74 changes: 74 additions & 0 deletions
74
...impl/src/test/java/org/fcrepo/kernel/impl/rdf/impl/PrefixingIdentifierTranslatorTest.java
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| /** | ||
| * 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.impl.rdf.impl; | ||
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| import org.junit.Before; | ||
| import org.junit.Test; | ||
| import org.junit.runner.RunWith; | ||
| import org.junit.runners.Parameterized; | ||
| import org.mockito.Mock; | ||
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| import javax.jcr.Session; | ||
| import java.util.Arrays; | ||
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| import static com.hp.hpl.jena.rdf.model.ResourceFactory.createResource; | ||
| import static org.junit.Assert.assertEquals; | ||
| import static org.mockito.MockitoAnnotations.initMocks; | ||
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| /** | ||
| * @author cabeer | ||
| * @author escowles | ||
| * @since 2015-04-24 | ||
| */ | ||
| @RunWith(Parameterized.class) | ||
| public class PrefixingIdentifierTranslatorTest { | ||
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| @Parameterized.Parameter(value = 0) | ||
| public String internalId; | ||
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| @Parameterized.Parameter(value = 1) | ||
| public String externalId; | ||
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| private PrefixingIdentifierTranslator testObj; | ||
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| @Mock | ||
| private Session mockSession; | ||
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| @Parameterized.Parameters | ||
| public static Iterable<String[]> data() { | ||
| return Arrays.asList(new String[][]{ | ||
| {"/", "http://example.com:8080/rest/"}, | ||
| {"/some/path", "http://example.com:8080/rest/some/path"}, | ||
| {"/some/path/#/with-a-hash-uri", "http://example.com:8080/rest/some/path#with-a-hash-uri"} | ||
| }); | ||
| } | ||
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| @Before | ||
| public void setUp() { | ||
| initMocks(this); | ||
| testObj = new PrefixingIdentifierTranslator(mockSession, "http://example.com:8080/rest/"); | ||
| } | ||
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| @Test | ||
| public void testToString() { | ||
| assertEquals(internalId, testObj.asString(createResource(externalId))); | ||
| } | ||
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| @Test | ||
| public void testToDomain() { | ||
| assertEquals(createResource(externalId), testObj.toDomain(internalId)); | ||
| } | ||
| } |