/* 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.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
import org.locationtech.geogig.api.GeoGIG;
import org.locationtech.geogig.api.ObjectId;
import org.locationtech.geogig.api.RevCommit;
import org.locationtech.geogig.api.plumbing.diff.DiffEntry;
import org.locationtech.geogig.api.porcelain.DiffOp;
import org.restlet.Context;
import org.restlet.data.Form;
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;
/**
* Returns a list of all feature ids affected by a specified commit.
*/
public class AffectedFeaturesResource extends Resource {
@Override
public void init(Context context, Request request, Response response) {
super.init(context, request, response);
List<Variant> variants = getVariants();
variants.add(new AffectedFeaturesRepresentation(request));
}
private static class AffectedFeaturesRepresentation extends OutputRepresentation {
private Request request;
public AffectedFeaturesRepresentation(Request request) {
super(MediaType.TEXT_PLAIN);
this.request = request;
}
@Override
public void write(OutputStream out) throws IOException {
PrintWriter w = new PrintWriter(out);
Form options = request.getResourceRef().getQueryAsForm();
Optional<String> commit = Optional
.fromNullable(options.getFirstValue("commitId", null));
Preconditions.checkState(commit.isPresent(), "No commit specified.");
GeoGIG ggit = getGeogig(request).get();
ObjectId commitId = ObjectId.valueOf(commit.get());
RevCommit revCommit = ggit.getRepository().getCommit(commitId);
if (revCommit.getParentIds() != null && revCommit.getParentIds().size() > 0) {
ObjectId parentId = revCommit.getParentIds().get(0);
final Iterator<DiffEntry> diff = ggit.command(DiffOp.class).setOldVersion(parentId)
.setNewVersion(commitId).call();
while (diff.hasNext()) {
DiffEntry diffEntry = diff.next();
if (diffEntry.getOldObject() != null) {
w.write(diffEntry.getOldObject().getNode().getObjectId().toString() + "\n");
}
}
w.flush();
}
}
}
}