/
ShpExportDiff.java
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/
ShpExportDiff.java
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/* Copyright (c) 2014-2016 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:
* Victor Olaya (Boundless) - initial implementation
*/
package org.locationtech.geogig.geotools.cli.shp;
import java.io.File;
import java.io.IOException;
import java.io.Serializable;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.geotools.data.shapefile.ShapefileDataStore;
import org.geotools.data.shapefile.ShapefileDataStoreFactory;
import org.geotools.data.simple.SimpleFeatureSource;
import org.geotools.data.simple.SimpleFeatureStore;
import org.geotools.feature.simple.SimpleFeatureBuilder;
import org.geotools.feature.simple.SimpleFeatureTypeBuilder;
import org.locationtech.geogig.cli.CLICommand;
import org.locationtech.geogig.cli.CommandFailedException;
import org.locationtech.geogig.cli.GeogigCLI;
import org.locationtech.geogig.cli.InvalidParameterException;
import org.locationtech.geogig.geotools.plumbing.ExportDiffOp;
import org.locationtech.geogig.geotools.plumbing.ExportOp;
import org.locationtech.geogig.geotools.plumbing.GeoToolsOpException;
import org.locationtech.geogig.model.NodeRef;
import org.locationtech.geogig.model.ObjectId;
import org.locationtech.geogig.model.RevFeatureType;
import org.locationtech.geogig.model.RevObject;
import org.locationtech.geogig.model.RevTree;
import org.locationtech.geogig.plumbing.FindTreeChild;
import org.locationtech.geogig.plumbing.ResolveTreeish;
import org.locationtech.geogig.plumbing.RevObjectParse;
import org.locationtech.geogig.repository.impl.GeoGIG;
import org.opengis.feature.Feature;
import org.opengis.feature.GeometryAttribute;
import org.opengis.feature.Property;
import org.opengis.feature.simple.SimpleFeatureType;
import org.opengis.feature.type.AttributeDescriptor;
import com.beust.jcommander.Parameter;
import com.beust.jcommander.Parameters;
import com.google.common.base.Function;
import com.google.common.base.Optional;
/**
* Exports features from a feature type into a shapefile.
*
* @see ExportOp
*/
@Parameters(commandNames = "export-diff", commandDescription = "Export changed features to Shapefile")
public class ShpExportDiff extends AbstractShpCommand implements CLICommand {
@Parameter(description = "<commit1> <commit2> <path> <shapefile>", arity = 4)
public List<String> args;
@Parameter(names = { "--overwrite", "-o" }, description = "Overwrite output files")
public boolean overwrite;
@Parameter(names = {
"--old" }, description = "Export features from the old version instead of the most recent one")
public boolean old;
/**
* Charset to use for encoding attributes in DBF file
*/
@Parameter(names = {
"--charset" }, description = "Use the specified charset to encode attributes. Default is ISO-8859-1.")
public String charset = "ISO-8859-1";
/**
* Executes the export command using the provided options.
*/
@Override
protected void runInternal(GeogigCLI cli) throws IOException {
if (args.size() != 4) {
printUsage(cli);
throw new CommandFailedException();
}
String commitOld = args.get(0);
String commitNew = args.get(1);
String path = args.get(2);
String shapefile = args.get(3);
ShapefileDataStoreFactory dataStoreFactory = new ShapefileDataStoreFactory();
File file = new File(shapefile);
if (file.exists() && !overwrite) {
throw new CommandFailedException(
"The selected shapefile already exists. Use -o to overwrite");
}
Map<String, Serializable> params = new HashMap<String, Serializable>();
params.put(ShapefileDataStoreFactory.URLP.key, file.toURI().toURL());
params.put(ShapefileDataStoreFactory.CREATE_SPATIAL_INDEX.key, Boolean.FALSE);
params.put(ShapefileDataStoreFactory.ENABLE_SPATIAL_INDEX.key, Boolean.FALSE);
params.put(ShapefileDataStoreFactory.DBFCHARSET.key, charset);
ShapefileDataStore dataStore = (ShapefileDataStore) dataStoreFactory
.createNewDataStore(params);
SimpleFeatureType outputFeatureType;
try {
String ref = old ? commitOld : commitNew;
outputFeatureType = getFeatureType(ref, path, cli);
} catch (GeoToolsOpException e) {
cli.getConsole().println("No features to export.");
return;
}
SimpleFeatureTypeBuilder builder = new SimpleFeatureTypeBuilder();
builder.add(ExportDiffOp.CHANGE_TYPE_NAME, String.class);
for (AttributeDescriptor descriptor : outputFeatureType.getAttributeDescriptors()) {
builder.add(descriptor);
}
builder.setName(outputFeatureType.getName());
builder.setCRS(outputFeatureType.getCoordinateReferenceSystem());
outputFeatureType = builder.buildFeatureType();
dataStore.createSchema(outputFeatureType);
final String typeName = dataStore.getTypeNames()[0];
final SimpleFeatureSource featureSource = dataStore.getFeatureSource(typeName);
if (!(featureSource instanceof SimpleFeatureStore)) {
throw new CommandFailedException("Could not create feature store.");
}
final SimpleFeatureStore featureStore = (SimpleFeatureStore) featureSource;
Function<Feature, Optional<Feature>> function = getTransformingFunction(
dataStore.getSchema());
ExportDiffOp op = cli.getGeogig().command(ExportDiffOp.class).setFeatureStore(featureStore)
.setPath(path).setOldRef(commitOld).setNewRef(commitNew).setUseOld(old)
.setTransactional(false).setFeatureTypeConversionFunction(function);
try {
op.setProgressListener(cli.getProgressListener()).call();
} catch (IllegalArgumentException iae) {
throw new org.locationtech.geogig.cli.InvalidParameterException(iae.getMessage(), iae);
} catch (GeoToolsOpException e) {
file.delete();
switch (e.statusCode) {
case MIXED_FEATURE_TYPES:
throw new CommandFailedException(
"Error: The selected tree contains mixed feature types.", true);
default:
throw new CommandFailedException("Could not export. Error:" + e.statusCode.name(),
e);
}
}
cli.getConsole().println(path + " exported successfully to " + shapefile);
}
private Function<Feature, Optional<Feature>> getTransformingFunction(
final SimpleFeatureType featureType) {
Function<Feature, Optional<Feature>> function = (feature) -> {
SimpleFeatureBuilder builder = new SimpleFeatureBuilder(featureType);
for (Property property : feature.getProperties()) {
if (property instanceof GeometryAttribute) {
builder.set(featureType.getGeometryDescriptor().getName(), property.getValue());
} else {
builder.set(property.getName(), property.getValue());
}
}
Feature modifiedFeature = builder.buildFeature(feature.getIdentifier().getID());
return Optional.fromNullable(modifiedFeature);
};
return function;
}
private SimpleFeatureType getFeatureType(String ref, String path, GeogigCLI cli) {
checkParameter(path != null, "No path specified.");
final GeoGIG geogig = cli.getGeogig();
Optional<ObjectId> rootTreeId = geogig.command(ResolveTreeish.class).setTreeish(ref).call();
checkParameter(rootTreeId.isPresent(),
"Couldn't resolve '" + ref + "' to a treeish object");
RevTree rootTree = geogig.getRepository().getTree(rootTreeId.get());
Optional<NodeRef> featureTypeTree = geogig.command(FindTreeChild.class).setChildPath(path)
.setParent(rootTree).call();
checkParameter(featureTypeTree.isPresent(),
"pathspec '" + path + "' did not match any valid path");
Optional<RevObject> revObject = cli.getGeogig().command(RevObjectParse.class)
.setObjectId(featureTypeTree.get().getMetadataId()).call();
if (revObject.isPresent() && revObject.get() instanceof RevFeatureType) {
RevFeatureType revFeatureType = (RevFeatureType) revObject.get();
if (revFeatureType.type() instanceof SimpleFeatureType) {
return (SimpleFeatureType) revFeatureType.type();
} else {
throw new InvalidParameterException(
"Cannot find feature type for the specified path");
}
} else {
throw new InvalidParameterException("Cannot find feature type for the specified path");
}
}
}