Examples with Conflict org.locationtech.geogig.api.plumbing.merge.Conflict used on opensource projects

Example 36 with Conflict

use of org.locationtech.geogig.api.plumbing.merge.Conflict in project GeoGig by boundlessgeo.

the class ResponseWriter method writeConflicts.

/**
     * Writes the response for a set of conflicts while also supplying the geometry.
     * 
     * @param geogig - a CommandLocator to call commands from
     * @param conflicts - a Conflict iterator to build the response from
     * @throws XMLStreamException
     */
public void writeConflicts(final Context geogig, Iterator<Conflict> conflicts, final ObjectId ours, final ObjectId theirs) throws XMLStreamException {
    Iterator<GeometryConflict> conflictIterator = Iterators.transform(conflicts, new Function<Conflict, GeometryConflict>() {

        @Override
        public GeometryConflict apply(Conflict input) {
            ObjectId commitId = ours;
            if (input.getOurs().equals(ObjectId.NULL)) {
                commitId = theirs;
            }
            Optional<RevObject> object = geogig.command(RevObjectParse.class).setObjectId(commitId).call();
            RevCommit commit = null;
            if (object.isPresent() && object.get() instanceof RevCommit) {
                commit = (RevCommit) object.get();
            } else {
                throw new CommandSpecException("Couldn't resolve id: " + commitId.toString() + " to a commit");
            }
            object = geogig.command(RevObjectParse.class).setObjectId(commit.getTreeId()).call();
            Optional<NodeRef> node = Optional.absent();
            if (object.isPresent()) {
                RevTree tree = (RevTree) object.get();
                node = geogig.command(FindTreeChild.class).setParent(tree).setChildPath(input.getPath()).call();
            } else {
                throw new CommandSpecException("Couldn't resolve commit's treeId");
            }
            RevFeatureType type = null;
            RevFeature feature = null;
            if (node.isPresent()) {
                object = geogig.command(RevObjectParse.class).setObjectId(node.get().getMetadataId()).call();
                if (object.isPresent() && object.get() instanceof RevFeatureType) {
                    type = (RevFeatureType) object.get();
                } else {
                    throw new CommandSpecException("Couldn't resolve newCommit's featureType");
                }
                object = geogig.command(RevObjectParse.class).setObjectId(node.get().objectId()).call();
                if (object.isPresent() && object.get() instanceof RevFeature) {
                    feature = (RevFeature) object.get();
                } else {
                    throw new CommandSpecException("Couldn't resolve newCommit's feature");
                }
            }
            GeometryConflict conflict = null;
            if (feature != null && type != null) {
                String crsCode = null;
                Collection<PropertyDescriptor> attribs = type.type().getDescriptors();
                for (PropertyDescriptor attrib : attribs) {
                    PropertyType attrType = attrib.getType();
                    if (attrType instanceof GeometryType) {
                        GeometryType gt = (GeometryType) attrType;
                        CoordinateReferenceSystem crs = gt.getCoordinateReferenceSystem();
                        if (crs != null) {
                            try {
                                crsCode = CRS.lookupIdentifier(Citations.EPSG, crs, false);
                            } catch (FactoryException e) {
                                crsCode = null;
                            }
                            if (crsCode != null) {
                                crsCode = "EPSG:" + crsCode;
                            }
                        }
                        break;
                    }
                }
                FeatureBuilder builder = new FeatureBuilder(type);
                GeogigSimpleFeature simpleFeature = (GeogigSimpleFeature) builder.build(feature.getId().toString(), feature);
                Geometry geom = null;
                List<Object> attributes = simpleFeature.getAttributes();
                for (Object attribute : attributes) {
                    if (attribute instanceof Geometry) {
                        geom = (Geometry) attribute;
                        break;
                    }
                }
                conflict = new GeometryConflict(input, geom, crsCode);
            }
            return conflict;
        }
    });
    while (conflictIterator.hasNext()) {
        GeometryConflict next = conflictIterator.next();
        if (next != null) {
            out.writeStartElement("Feature");
            writeElement("change", "CONFLICT");
            writeElement("id", next.getConflict().getPath());
            writeElement("ourvalue", next.getConflict().getOurs().toString());
            writeElement("theirvalue", next.getConflict().getTheirs().toString());
            writeElement("geometry", next.getGeometry().toText());
            if (next.getCRS() != null) {
                writeElement("crs", next.getCRS());
            }
            out.writeEndElement();
        }
    }
}