@Override
protected RevTree read(ObjectId id, BufferedReader reader, TYPE type) throws IOException {
Preconditions.checkArgument(TYPE.TREE.equals(type), "Wrong type: %s", type.name());
Builder<Node> features = ImmutableList.builder();
Builder<Node> trees = ImmutableList.builder();
TreeMap<Integer, Bucket> subtrees = Maps.newTreeMap();
long size = Long.parseLong(parseLine(requireLine(reader), "size"));
int numTrees = Integer.parseInt(parseLine(requireLine(reader), "numtrees"));
String line;
while ((line = reader.readLine()) != null) {
Preconditions.checkArgument(!line.isEmpty(), "Empty tree element definition");
ArrayList<String> tokens = Lists.newArrayList(Splitter.on('\t').split(line));
String nodeType = tokens.get(0);
if (nodeType.equals(TextWriter.TreeNode.REF.name())) {
Node entryRef = parseNodeLine(line);
if (entryRef.getType().equals(TYPE.TREE)) {
trees.add(entryRef);
} else {
features.add(entryRef);
}
} else if (nodeType.equals(TextWriter.TreeNode.BUCKET.name())) {
Preconditions.checkArgument(tokens.size() == 4, "Wrong bucket definition: %s", line);
Integer idx = Integer.parseInt(tokens.get(1));
ObjectId bucketId = ObjectId.valueOf(tokens.get(2));
Envelope bounds = parseBBox(tokens.get(3));
Bucket bucket = Bucket.create(bucketId, bounds);
subtrees.put(idx, bucket);
} else {
throw new IllegalArgumentException("Wrong tree element definition: " + line);
}
}
RevTree tree;
if (subtrees.isEmpty()) {
tree = RevTreeImpl.createLeafTree(id, size, features.build(), trees.build());
} else {
tree = RevTreeImpl.createNodeTree(id, size, numTrees, subtrees);
}
return tree;
}
