/* Copyright (c) 2013-2014 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:
* Victor Olaya (Boundless) - initial implementation
*/
package org.locationtech.geogig.api.porcelain;
import java.util.Iterator;
import java.util.Map;
import org.locationtech.geogig.api.AbstractGeoGigOp;
import org.locationtech.geogig.api.ObjectId;
import org.locationtech.geogig.api.Ref;
import org.locationtech.geogig.api.RevCommit;
import org.locationtech.geogig.api.RevFeature;
import org.locationtech.geogig.api.RevFeatureType;
import org.locationtech.geogig.api.RevObject.TYPE;
import org.locationtech.geogig.api.plumbing.DiffFeature;
import org.locationtech.geogig.api.plumbing.ResolveFeatureType;
import org.locationtech.geogig.api.plumbing.ResolveObjectType;
import org.locationtech.geogig.api.plumbing.RevObjectParse;
import org.locationtech.geogig.api.plumbing.RevParse;
import org.locationtech.geogig.api.plumbing.diff.AttributeDiff;
import org.locationtech.geogig.api.plumbing.diff.DiffEntry;
import org.locationtech.geogig.api.plumbing.diff.FeatureDiff;
import org.locationtech.geogig.api.porcelain.BlameException.StatusCode;
import org.locationtech.geogig.di.CanRunDuringConflict;
import org.opengis.feature.type.PropertyDescriptor;
import com.google.common.base.Optional;
import com.google.common.base.Suppliers;
/**
* Creates a report that contains information about who was the last to change each attribute in a
* feature
*
*/
@CanRunDuringConflict
public class BlameOp extends AbstractGeoGigOp<BlameReport> {
private String path;
private ObjectId commit;
/**
* Sets the path of the feature to use
*
* @param String path
* @return
*/
public BlameOp setPath(String path) {
this.path = path;
return this;
}
/**
* Sets the commit to blame from
*
* @param ObjectId commit
* @return
*/
public BlameOp setCommit(ObjectId commit) {
this.commit = commit;
return this;
}
@Override
protected BlameReport _call() {
String fullPath = (commit != null ? commit.toString() : Ref.HEAD) + ":" + path;
Optional<ObjectId> id = command(RevParse.class).setRefSpec(fullPath).call();
if (!id.isPresent()) {
throw new BlameException(StatusCode.FEATURE_NOT_FOUND);
}
TYPE type = command(ResolveObjectType.class).setObjectId(id.get()).call();
if (!type.equals(TYPE.FEATURE)) {
throw new BlameException(StatusCode.PATH_NOT_FEATURE);
}
Optional<RevFeatureType> featureType = command(ResolveFeatureType.class).setRefSpec(path)
.call();
BlameReport report = new BlameReport(featureType.get());
Iterator<RevCommit> log = command(LogOp.class).addPath(path).setUntil(commit).call();
RevCommit commit = log.next();
RevObjectParse revObjectParse = command(RevObjectParse.class);
DiffOp diffOp = command(DiffOp.class);
DiffFeature diffFeature = command(DiffFeature.class);
while (!report.isComplete()) {
if (!log.hasNext()) {
String refSpec = commit.getId().toString() + ":" + path;
RevFeature feature = revObjectParse.setRefSpec(refSpec).call(RevFeature.class)
.get();
report.setFirstVersion(feature, commit);
break;
}
RevCommit commitB = log.next();
Iterator<DiffEntry> diffs = diffOp.setNewVersion(commit.getId())
.setOldVersion(commitB.getId()).setReportTrees(false).call();
while (diffs.hasNext()) {
DiffEntry diff = diffs.next();
if (path.equals(diff.newPath())) {
if (diff.isAdd()) {
String refSpec = commit.getId().toString() + ":" + path;
RevFeature feature = revObjectParse.setRefSpec(refSpec)
.call(RevFeature.class).get();
report.setFirstVersion(feature, commit);
break;
}
FeatureDiff featureDiff = diffFeature
.setNewVersion(Suppliers.ofInstance(diff.getNewObject()))
.setOldVersion(Suppliers.ofInstance(diff.getOldObject())).call();
Map<PropertyDescriptor, AttributeDiff> attribDiffs = featureDiff.getDiffs();
Iterator<PropertyDescriptor> iter = attribDiffs.keySet().iterator();
while (iter.hasNext()) {
PropertyDescriptor key = iter.next();
Optional<?> value = attribDiffs.get(key).getNewValue();
String attribute = key.getName().toString();
report.addDiff(attribute, value, commit);
}
}
}
commit = commitB;
}
return report;
}
}