/* Copyright (c) 2014 Boundless and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Distribution License v1.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/org/documents/edl-v10.html
*
* Contributors:
* Gabriel Roldan (Boundless) - initial implementation
*/
package org.locationtech.geogig.rest.repository;
import static org.locationtech.geogig.rest.repository.RESTUtils.getGeogig;
import java.io.IOException;
import java.io.OutputStream;
import java.util.List;
import org.locationtech.geogig.api.GeoGIG;
import org.locationtech.geogig.api.ObjectId;
import org.locationtech.geogig.api.RevObject;
import org.locationtech.geogig.repository.Repository;
import org.locationtech.geogig.storage.ObjectSerializingFactory;
import org.locationtech.geogig.storage.datastream.DataStreamSerializationFactoryV1;
import org.restlet.Context;
import org.restlet.Finder;
import org.restlet.data.MediaType;
import org.restlet.data.Request;
import org.restlet.data.Response;
import org.restlet.resource.OutputRepresentation;
import org.restlet.resource.Resource;
import org.restlet.resource.Variant;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
/**
* Expects an {@code id} request attribute containing the string representation of an
* {@link ObjectId} (40 char hex string) to look up for in the repository database and return it as
* a plain byte stream.
*/
public class ObjectFinder extends Finder {
@Override
public Resource findTarget(Request request, Response response) {
if (request.getAttributes().containsKey("id")) {
final Optional<GeoGIG> ggit = getGeogig(request);
Preconditions.checkState(ggit.isPresent());
final String id = (String) request.getAttributes().get("id");
final ObjectId oid = ObjectId.valueOf(id);
GeoGIG geogig = ggit.get();
Repository repository = geogig.getRepository();
boolean blobExists = repository.blobExists(oid);
if (blobExists) {
ObjectResource objectResource = new ObjectResource(oid, geogig);
objectResource.init(getContext(), request, response);
return objectResource;
}
}
return super.findTarget(request, response);
}
private static class ObjectResource extends Resource {
private ObjectId oid;
private GeoGIG geogig;
public ObjectResource(ObjectId oid, GeoGIG geogig) {
this.oid = oid;
this.geogig = geogig;
}
@Override
public void init(Context context, Request request, Response response) {
super.init(context, request, response);
List<Variant> variants = getVariants();
variants.add(new RevObjectBinaryRepresentation(oid, geogig));
}
}
private static class RevObjectBinaryRepresentation extends OutputRepresentation {
private final ObjectId oid;
private static final ObjectSerializingFactory serialFac = DataStreamSerializationFactoryV1.INSTANCE;
private final GeoGIG ggit;
public RevObjectBinaryRepresentation(ObjectId oid, GeoGIG ggit) {
super(MediaType.APPLICATION_OCTET_STREAM);
this.oid = oid;
this.ggit = ggit;
}
@Override
public void write(OutputStream out) throws IOException {
Repository repository = ggit.getRepository();
RevObject rawObject = repository.objectDatabase().get(oid);
serialFac.createObjectWriter(rawObject.getType()).write(rawObject, out);
}
}
}