private static void addElement(
List<String> lines, Patch patch, Map<String, RevFeatureType> featureTypes)
throws IOException {
String[] headerTokens = lines.get(0).split("\t");
if (headerTokens.length == 4 || headerTokens.length == 3) { // feature or feature type
// modified // modification
if (lines.size() == 1) { // feature type
FeatureTypeDiff diff =
new FeatureTypeDiff(
headerTokens[0],
ObjectId.valueOf(headerTokens[1]),
ObjectId.valueOf(headerTokens[2]));
patch.addAlteredTree(diff);
} else { // feature
String element = Joiner.on("\n").join(lines.subList(1, lines.size()));
ByteArrayInputStream stream;
stream = new ByteArrayInputStream(element.getBytes(Charsets.UTF_8));
String operation = headerTokens[0].trim();
if (operation.equals("M")) {
String fullPath = headerTokens[1].trim();
String oldMetadataId = headerTokens[2].trim();
String newMetadataId = headerTokens[3].trim();
RevFeatureType newRevFeatureType = featureTypes.get(newMetadataId);
RevFeatureType oldRevFeatureType = featureTypes.get(oldMetadataId);
Map<PropertyDescriptor, AttributeDiff> map = Maps.newHashMap();
for (int i = 1; i < lines.size(); i++) {
addDifference(lines.get(i), map, oldRevFeatureType, newRevFeatureType);
}
FeatureDiff featureDiff =
new FeatureDiff(fullPath, map, oldRevFeatureType, newRevFeatureType);
patch.addModifiedFeature(featureDiff);
} else if (operation.equals("A") || operation.equals("R")) {
String fullPath = headerTokens[1].trim();
String featureTypeId = headerTokens[2].trim();
RevFeatureType revFeatureType;
revFeatureType = featureTypes.get(featureTypeId);
FeatureBuilder featureBuilder = new FeatureBuilder(revFeatureType);
RevFeature revFeature = (RevFeature) serializer.read(null, stream);
Feature feature = featureBuilder.build(NodeRef.nodeFromPath(fullPath), revFeature);
if (operation.equals("R")) {
patch.addRemovedFeature(fullPath, feature, revFeatureType);
} else {
patch.addAddedFeature(fullPath, feature, revFeatureType);
}
} else {
throw new IllegalArgumentException("Wrong patch content: " + lines.get(0));
}
}
} else if (headerTokens.length == 1) { // feature type definition
String element = Joiner.on("\n").join(lines);
ByteArrayInputStream stream = new ByteArrayInputStream(element.getBytes(Charsets.UTF_8));
String[] tokens = lines.get(1).split("\t");
RevFeatureType featureType = (RevFeatureType) serializer.read(null, stream);
featureTypes.put(featureType.getId().toString(), featureType);
} else {
throw new IllegalArgumentException("Wrong patch content: " + lines.get(0));
}
}
public static void write(Writer w, Patch patch) throws IOException {
StringBuilder sb = new StringBuilder();
List<RevFeatureType> featureTypes = patch.getFeatureTypes();
for (RevFeatureType featureType : featureTypes) {
ByteArrayOutputStream output = new ByteArrayOutputStream();
serializer.write(featureType, output);
sb.append(output.toString());
sb.append('\n');
}
for (FeatureInfo feature : patch.getAddedFeatures()) {
String path = feature.getPath();
sb.append("A\t" + path + "\t" + feature.getFeatureType().getId() + "\n");
ByteArrayOutputStream output = new ByteArrayOutputStream();
RevFeature revFeature = RevFeatureBuilder.build(feature.getFeature());
try {
serializer.write(revFeature, output);
} catch (IOException e) {
}
sb.append(output.toString());
sb.append('\n');
}
for (FeatureInfo feature : patch.getRemovedFeatures()) {
String path = feature.getPath();
sb.append("R\t" + path + "\t" + feature.getFeatureType().getId() + "\n");
ByteArrayOutputStream output = new ByteArrayOutputStream();
RevFeature revFeature = RevFeatureBuilder.build(feature.getFeature());
try {
serializer.write(revFeature, output);
} catch (IOException e) {
}
sb.append(output.toString());
sb.append('\n');
}
for (FeatureDiff diff : patch.getModifiedFeatures()) {
sb.append(
"M\t"
+ diff.getPath()
+ "\t"
+ diff.getOldFeatureType().getId().toString()
+ "\t"
+ diff.getNewFeatureType().getId().toString()
+ "\n");
sb.append(diff.asText() + "\n");
}
for (FeatureTypeDiff diff : patch.getAlteredTrees()) {
sb.append(diff.toString() + "\n");
}
w.write(sb.toString());
w.flush();
}