public DiffData readDiffData(String source) throws ReviewboardException {
try {
JSONObject jsonDiffData = checkedGetJSonRootObject(source).getJSONObject("diff_data");
DiffData diffData = new DiffData();
diffData.setBinary(jsonDiffData.getBoolean("binary"));
diffData.setNewFile(jsonDiffData.getBoolean("new_file"));
diffData.setNumChanges(jsonDiffData.getInt("num_changes"));
JSONArray changedChunkIndexes = jsonDiffData.getJSONArray("changed_chunk_indexes");
for (int i = 0; i < changedChunkIndexes.length(); i++)
diffData.getChangedChunkIndexes().add(changedChunkIndexes.getInt(i));
JSONArray chunks = jsonDiffData.getJSONArray("chunks");
for (int i = 0; i < chunks.length(); i++) {
JSONObject jsonChunk = chunks.getJSONObject(i);
Chunk chunk = new Chunk();
chunk.setChange(Type.fromString(jsonChunk.getString("change")));
chunk.setCollapsable(jsonChunk.getBoolean("collapsable"));
chunk.setIndex(jsonChunk.getInt("index"));
chunk.setNumLines(jsonChunk.getInt("numlines"));
JSONArray lines = jsonChunk.getJSONArray("lines");
for (int j = 0; j < lines.length(); j++) {
JSONArray lineArray = lines.getJSONArray(j);
Line line = new Line();
line.setDiffRowNumber(lineArray.getInt(0));
line.setLeftFileRowNumber(getPossiblyEmptyInt(lineArray, 1));
line.setLeftLineText(lineArray.getString(2));
line.setRightFileRowNumber(getPossiblyEmptyInt(lineArray, 4));
line.setRightLineText(lineArray.getString(5));
line.setWhitespaceOnly(lineArray.getBoolean(7));
chunk.getLines().add(line);
}
diffData.getChunks().add(chunk);
}
return diffData;
} catch (JSONException e) {
throw new ReviewboardException(e.getMessage(), e);
}
}
/**
* Get all data required to create a diff view wrt. to this request in one go.
*
* @return an instance with just enough information to render a sufficient view. If not all
* required parameters were given either they are supplemented with reasonable defaults if
* possible, otherwise the related field(s) are {@code null}. {@link DiffData#errorMsg} {@code
* != null} indicates, that an error occured and one should not try to render a view.
*/
public DiffData getDiffData() {
DiffData data = new DiffData();
data.path = getPath().substring(0, path.lastIndexOf('/'));
data.filename = Util.htmlize(getResourceFile().getName());
String srcRoot = getSourceRootPath();
String context = req.getContextPath();
String[] filepath = new String[2];
data.rev = new String[2];
data.file = new String[2][];
data.param = new String[2];
/*
* Basically the request URI looks like this:
* http://$site/$webapp/diff/$resourceFile?r1=$fileA@$revA&r2=$fileB@$revB
* The code below extracts file path and revision from the URI.
*/
for (int i = 1; i <= 2; i++) {
String[] tmp = null;
String p = req.getParameter("r" + i);
if (p != null) {
tmp = p.split("@");
}
if (tmp != null && tmp.length == 2) {
filepath[i - 1] = tmp[0];
data.rev[i - 1] = tmp[1];
}
}
if (data.rev[0] == null
|| data.rev[1] == null
|| data.rev[0].length() == 0
|| data.rev[1].length() == 0
|| data.rev[0].equals(data.rev[1])) {
data.errorMsg =
"Please pick two revisions to compare the changed "
+ "from the <a href=\""
+ context
+ Prefix.HIST_L
+ getUriEncodedPath()
+ "\">history</a>";
return data;
}
data.genre = AnalyzerGuru.getGenre(getResourceFile().getName());
if (data.genre == null || txtGenres.contains(data.genre)) {
InputStream[] in = new InputStream[2];
try {
// Get input stream for both older and newer file.
for (int i = 0; i < 2; i++) {
File f = new File(srcRoot + filepath[i]);
in[i] = HistoryGuru.getInstance().getRevision(f.getParent(), f.getName(), data.rev[i]);
if (in[i] == null) {
data.errorMsg =
"Unable to get revision "
+ Util.htmlize(data.rev[i])
+ " for file: "
+ Util.htmlize(getPath());
return data;
}
}
/*
* If the genre of the older revision cannot be determined,
* (this can happen if the file was empty), try with newer
* version.
*/
for (int i = 0; i < 2 && data.genre == null; i++) {
try {
data.genre = AnalyzerGuru.getGenre(in[i]);
} catch (IOException e) {
data.errorMsg = "Unable to determine the file type: " + Util.htmlize(e.getMessage());
}
}
if (data.genre != Genre.PLAIN && data.genre != Genre.HTML) {
return data;
}
ArrayList<String> lines = new ArrayList<>();
Project p = getProject();
for (int i = 0; i < 2; i++) {
try (BufferedReader br =
new BufferedReader(ExpandTabsReader.wrap(new InputStreamReader(in[i]), p))) {
String line;
while ((line = br.readLine()) != null) {
lines.add(line);
}
data.file[i] = lines.toArray(new String[lines.size()]);
lines.clear();
}
in[i] = null;
}
} catch (Exception e) {
data.errorMsg = "Error reading revisions: " + Util.htmlize(e.getMessage());
} finally {
for (int i = 0; i < 2; i++) {
IOUtils.close(in[i]);
}
}
if (data.errorMsg != null) {
return data;
}
try {
data.revision = Diff.diff(data.file[0], data.file[1]);
} catch (DifferentiationFailedException e) {
data.errorMsg = "Unable to get diffs: " + Util.htmlize(e.getMessage());
}
for (int i = 0; i < 2; i++) {
try {
URI u = new URI(null, null, null, filepath[i] + "@" + data.rev[i], null);
data.param[i] = u.getRawQuery();
} catch (URISyntaxException e) {
LOGGER.log(Level.WARNING, "Failed to create URI: ", e);
}
}
data.full = fullDiff();
data.type = getDiffType();
}
return data;
}