I want to extract signature changes (method parameter changes to be exact) from commits to git repository by a java program. I have used the following code:
for (Ref branch : branches) {
String branchName = branch.getName();
for (RevCommit commit : commits) {
boolean foundInThisBranch = false;
RevCommit targetCommit = walk.parseCommit(repo.resolve(
commit.getName()));
for (Map.Entry<String, Ref> e : repo.getAllRefs().entrySet()) {
if (e.getKey().startsWith(Constants.R_HEADS)) {
if (walk.isMergedInto(targetCommit, walk.parseCommit(
e.getValue().getObjectId()))) {
String foundInBranch = e.getValue().getName();
if (branchName.equals(foundInBranch)) {
foundInThisBranch = true;
break;
}
}
}
}
I can extract commit message, commit data and Author name from that, however, I am not able to extract parameter changes from them. I mean it is unable for me to identify parameter changes. I want to know if there is any way to recognize that. I mean it is impossible to recognize them from commit notes that are generated by programmers; I am looking for something like any specific annotation or something else.
This is my code to extract differences:
CanonicalTreeParser oldTreeIter = new CanonicalTreeParser();
oldTreeIter.reset(reader, oldId);
CanonicalTreeParser newTreeIter = new CanonicalTreeParser();
newTreeIter.reset(reader, headId);
List<DiffEntry> diffs= git.diff()
.setNewTree(newTreeIter)
.setOldTree(oldTreeIter)
.call();
ByteArrayOutputStream out = new ByteArrayOutputStream();
DiffFormatter df = new DiffFormatter(out);
df.setRepository(git.getRepository());
The export is really huge and impossible to extract method changes.
You show a way you've found to examine the diffs, but say that the output is too large and you can't extract the method signature changes. If by that you mean that you're asking about specific git support for telling you that a method signature changes, then no - no such support exists. This is because git does not "know" anything about the languages you may or may not have used in the files under source control. Everything is just content that is, or is not, different from other content.
Since a method signature could be split across lines in any number of ways, it's not even guaranteed that just because a method's signature changed its name would appear anywhere in the diff. What you would really have to do is perform a sort of "structural diff". That is, you would have to
check out the "old" version, and pass it to a java parser
check out the "new" version, and pass it to a java parser
compare the resulting parse trees, looking for methods that belong to the same object, but have changed
Even that won't be terribly easy, because methods could be renamed, and because method overloading could make it unclear which signature change goes with which version of a method.
From there what you have is a non-trivial coding problem, which is beyond the scope of SO to answer. If you decide to tackle this problem and run into specific programming questions along the way, of course you could post those questions and perhaps someone will be able to help.
Related
SPSSReader reader = new SPSSReader(args[0], null);
Iterator it = reader.getVariables().iterator();
while (it.hasNext())
{
System.out.println(it.next());
}
I am using this SPSSReader to read the spss file. Here,every string is printed with some junk characters appended with it.
Obtained Result :
StringVariable: nameogr(nulltpc{)(10)
NumericVariable: weightppuo(nullf{nd)
DateVariable: datexsgzj(nulllanck)
DateVariable: timeppzb(null|wt{l)
DateVariable: datetimegulj{(null|ns)
NumericVariable: commissionyrqh(nullohzx)
NumericVariable: priceeub{av(nullvlpl)
Expected Result :
StringVariable: name (10)
NumericVariable: weight
DateVariable: date
DateVariable: time
DateVariable: datetime
NumericVariable: commission
NumericVariable: price
Thanks in advance :)
I tried recreating the issue and found the same thing.
Considering that there is a licensing for that library (see here), I would assume that this might be a way of the developers to ensure that a license is bought as the regular download only contains a demo version as evaluation (see licensing before the download).
As that library is rather old (copyright of the website is 2003-2008, requirement for the library is Java 1.2, no generics, Vectors are used, etc), I would recommend a different library as long as you are not limited to the one used in your question.
After a quick search, it turned out that there is an open source spss reader here which is also available through Maven here.
Using the example on the github page, I put this together:
import com.bedatadriven.spss.SpssDataFileReader;
import com.bedatadriven.spss.SpssVariable;
public class SPSSDemo {
public static void main(String[] args) {
try {
SpssDataFileReader reader = new SpssDataFileReader(args[0]);
for (SpssVariable var : reader.getVariables()) {
System.out.println(var.getVariableName());
}
} catch (Exception ex) {
ex.printStackTrace();
}
}
}
I wasn't able to find stuff that would print NumericVariable or similar things but as those were the classnames of the library you were using in the question, I will assume that those are not SPSS standardized. If they are, you will either find something like that in the library or you can open an issue on the github page.
Using the employees.sav file from here I got this output from the code above using the open source library:
resp_id
gender
first_name
last_name
date_of_birth
education_type
education_years
job_type
experience_years
monthly_income
job_satisfaction
No additional characters no more!
Edit regarding the comment:
That is correct. I read through some SPSS stuff though and from my understanding there are only string and numeric variables which are then formatted in different ways. The version published in maven only gives you access to the typecode of a variable (to be honest, no idea what that is) but the github version (that does not appear to be published on maven as 1.3-SNAPSHOT unfortunately) does after write- and printformat have been introduced.
You can clone or download the library and run mvn clean package (assuming you have maven installed) and use the generated library (found under target\spss-reader-1.3-SNAPSHOT.jar) in your project to have the methods SpssVariable#getPrintFormat and SpssVariable#getWriteFormat available.
Those return an SpssVariableFormat which you can get more information from. As I have no clue what all that is about, the best I can do is to link you to the source here where references to the stuff that was implemented there should help you further (I assume that this link referenced to in the documentation of SpssVariableFormat#getType is probably the most helpful to determine what kind of format you have there.
If absolutely NOTHING works with that, I guess you could use the demo version of the library in the question to determine the stuff through it.next().getClass().getSimpleName() as well but I would resort to that only if there is no other way to determining the format.
I am not sure, but looking at your code, it.next() is returning a Variable object.
There has to be some method to be chained to the Variable object, something like it.next().getLabel() or it.next().getVariableName(). toString() on an Object is not always meaningful. Check toString() method of Variable class in SPSSReader library.
Is there any way to inspect or enumerate the Custom Slot Values that are set-up in your interaction model? For Instance, Say you have an intent schema with the following intent:
{
"intent": "MySuperCoolIntent",
"slots":
[
{
"name": "ShapesNSuch",
"type": "LIST_OF_SHAPES"
}
]
}
Furthermore, you've defined the LIST_OF_SHAPES Custom Slot to have the following Values:
SQUARE
TRIANGLE
CIRCLE
ICOSADECAHECKASPECKAHEDRON
ROUND
HUSKY
Question: is there a method I can call from my Speechlet or my RequestStreamHandler that will give me an enumeration of those Custom Slot Values??
I have looked through the Alexa Skills Kit's SDK Javadocs Located Here
And I'm not finding anything.
I know I can get the Slot's value that is sent in with the intent:
String slotValue = incomingIntentRequest.getIntent().getSlot("LIST_OF_SHAPES").getValue();
I can even enumerate ALL the incoming Slots (and with it their values):
Map<String, Slot> slotMap = IncomingIntentRequest.getIntent().getSlots();
for(Map.Entry<String, Slot> entry : slotMap.entrySet())
{
String key = entry.getKey();
Slot slot = (Slot)entry.getValue();
String slotName = slot.getName();
String slotValue = slot.getValue();
//do something nifty with the current slot info....
}
What I would really like is something like:
String myAppId = "amzn1.echo-sdk-ams.app.<TheRestOfMyID>";
List<String> posibleSlotValues = SomeMagicAlexaAPI.getAllSlotValues(myAppId, "LIST_OF_SHAPES");
With this information I wouldn't have to maintain two separate "Lists" or "Enumerations"; One within the interaction Model and another one within my Request Handler. Seems like this should be a thing right?
No, the API does not allow you to do this.
However, since your interaction model is intimately tied with your development, I would suggest you check in the model with your source code in your source control system. If you are going to do that, you might as well put it with your source. Depending on your language, that also means you can probably read it during run-time.
Using this technique, you can gain access to your interaction model at run-time. Instead of doing it automatically through an API, you do it by best practice.
You can see several examples of this in action for Java in TsaTsaTzu's examples.
No - there is nothing in the API that allows you to do that.
You can see the full extent of the Request Body structure Alexa gives you to work with. It is very simple and available here:
https://developer.amazon.com/public/solutions/alexa/alexa-skills-kit/docs/alexa-skills-kit-interface-reference#Request%20Format
Please note, the Request Body is not to be confused with the request, which is a structure in the request body, with two siblings: version and session.
I've written a program to aid the user in configuring 'mechs for a game. I'm dealing with loading the user's saved data. This data can (and some times does) become partially corrupt (either due to bugs on my side or due to changes in the game data/rules from upstream).
I need to be able to handle this corruption and load as much as possible. To be more specific, the contents of the save file are syntactically correct but semantically corrupt. I can safely parse the file and drop whatever entries that are not semantically OK.
Currently my data parser will just show a modal dialog with an appropriate warning message. However displaying the warning is not the job of the parser and I'm looking for a way of passing this information to the caller.
Some code to show approximately what is going on (in reality there is a bit more going on than this, but this highlights the problem):
class Parser{
public void parse(XMLNode aNode){
...
if(corrupted) {
JOptionPane.showMessageDialog(null, "Corrupted data found",
"error!", JOptionPane.WARNING_MESSAGE);
// Keep calm and carry on
}
}
}
class UserData{
static UserData loadFromFile(File aFile){
UserData data = new UserData();
Parser parser = new Parser();
XMLDoc doc = fromXml(aFile);
for(XMLNode entry : doc.allEntries()){
data.append(parser.parse(entry));
}
return data;
}
}
The thing here is that bar an IOException or a syntax error in the XML, loadFromFile will always succeed in loading something and this is the wanted behavior. Somehow I just need to pass the information of what (if anything) went wrong to the caller. I could return a Pair<UserData,String> but this doesn't look very pretty. Throwing an exception will not work in this case obviously.
Does any one have any ideas on how to solve this?
Depending on what you are trying to represent, you can use a class, like SQLWarning from the java.sql package. When you have a java.sql.Statement and call executeQuery you get a java.sql.ResultSet and you can then call getWarnings on the result set directly, or even on the statement itself.
You can use an enum, like RefUpdate.Result, from the JGit project. When you have a org.eclipse.jgit.api.Git you can create a FetchCommand, which will provide you with a FetchResult, which will provide you with a collection of TrackingRefUpdates, which will each contain a RefUpdate.Result enum, which can be one of:
FAST_FORWARD
FORCED
IO_FAILURE
LOCK_FAILURE
NEW
NO_CHANGE
NOT_ATTEMPTED
REJECTED
REJECTED_CURRENT_BRANCH
RENAMED
In your case, you could even use a boolean flag:
class UserData {
public boolean isCorrupt();
}
But since you mentioned there is a bit more than that going on in reality, it really depends on your model of "corrupt". However, you will probably have more options if you have a UserDataReader that you can instantiate, instead of a static utility method.
I use this code from the JavaGit example:
File repositoryDirectory = new File("Library\\build\\jar\\");
DotGit dotGit = DotGit.getInstance(repositoryDirectory);
// Print commit messages of the current branch
for (Commit c : dotGit.getLog()) {
System.out.println(c.getMessage());
}
How could I get the id of commit this way?
Or it might be more appropriate library to interact with git?
According to the documentation (I don't know very much this library), you should invoke the getCommitName() method and use the returned Ref object to get the information you want (I think the SHA1 hash or the tag).
Part of a program I am working on requires looking up preprocessor macros by name, and then getting their values. I opted to use the CDT Indexer API. In order to make sure I am on the right track, I wrote a test method that does nothing but create a simple C file and confirm that it can find certain symbols in the index. However, I failed to get that test to run properly. Attempting to use IIndex.findBindings(char[], IndexFilter, IProgressMonitor) returns empty arrays for symbols that I know exist in the AST because they are part of the example file in the test method.
I can't post the exact test method because I use some custom classes and it would be overkill to post all of them, so I will just post the important code. First, my example file:
final String exampleCode =
"#define HEAVY 20\n" +
"#define TEST 5\n" +
"void function() { }\n" +
"int main() { return 0; }\n";
IFile exampleFile = testProject.getFile("findCodeFromIndex.c");
exampleFile.create(new ByteArrayInputStream(exampleCode.getBytes("UTF-8") ), true, null);
I have a custom class that automatically gets the IASTTranslationUnit from that file. The translation unit is fine (I can see the nodes making up everything except the macros). I get the index from that AST, and the code I use to look up in the index is
try {
index.acquireReadLock();
returnBinding = index.findBindings(name.toCharArray(), IndexFilter.ALL, null);
... catch stuff...
} finally {
index.releaseReadLock();
}
Where 'name' is going to be either "HEAVY", "TEST", or "function". None of them are found, despite existing in the example test c file.
I am guessing that the issue is the index is not rebuilt, which causes findBindings to return an empty array even if I know the given variable name exists in the AST.
My current attempt to start up the indexer looks like this:
final ICProject cProject = CoreModel.getDefault().getCModel().getCProject(testProject.getName());
CCorePlugin.getIndexManager().reindex(cProject);
CCorePlugin.getIndexManager().joinIndexer(IIndexManager.FOREVER, new NullProgressMonitor() );
Question Breakdown:
1) Is my method for searching the index sound?
2) If the issue is the index needing to be rebuilt, how should I properly force the index to be up to date for my test methods? Otherwise, what exactly is the reason I am not resolving the bindings for macros/functions I know exist?
I solved my own issue so I will post it here. I was correct in my comment that the lack of the project being a proper C project hindered the Indexer from working properly, however I also discovered I had to use a different method in the indexer to get the macros I needed.
Setting up the test enviornment:
Here is the code I have that creates a basic C project. The only purpose it serves is to allow the indexer to work for test methods. Still, it is large:
public static IProject createBareCProject(String name) throws Exception {
IProject bareProjectHandle = ResourcesPlugin.getWorkspace().getRoot().getProject(name);
IProjectDescription description =
bareProjectHandle.getWorkspace().newProjectDescription("TestProject");
description.setLocationURI(bareProjectHandle.getLocationURI() );
IProject bareProject =
CCorePlugin.getDefault().createCDTProject(description, bareProjectHandle, new NullProgressMonitor() );
IManagedBuildInfo buildInfo = ManagedBuildManager.createBuildInfo(bareProject);
IManagedProject projectManaged =
ManagedBuildManager
.createManagedProject(bareProject,
ManagedBuildManager.getExtensionProjectType("cdt.managedbuild.target.gnu.mingw.exe") );
List<IConfiguration> configs = getValidConfigsForPlatform();
IConfiguration config =
projectManaged.createConfiguration(
configs.get(0),
ManagedBuildManager.calculateChildId(configs.get(0).getId(), null));
ICProjectDescription cDescription =
CoreModel.getDefault().getProjectDescriptionManager().createProjectDescription(bareProject, false);
ICConfigurationDescription cConfigDescription =
cDescription.createConfiguration(ManagedBuildManager.CFG_DATA_PROVIDER_ID, config.getConfigurationData() );
cDescription.setActiveConfiguration(cConfigDescription);
cConfigDescription.setSourceEntries(null);
IFolder srcFolder = bareProject.getFolder("src");
srcFolder.create(true, true, null);
ICSourceEntry srcFolderEntry = new CSourceEntry(srcFolder, null, ICSettingEntry.RESOLVED);
cConfigDescription.setSourceEntries(new ICSourceEntry[] { srcFolderEntry });
buildInfo.setManagedProject(projectManaged);
cDescription.setCdtProjectCreated();
IIndexManager indexMgr = CCorePlugin.getIndexManager();
ICProject cProject = CoreModel.getDefault().getCModel().getCProject(bareProject.getName() );
indexMgr.setIndexerId(cProject, IPDOMManager.ID_FAST_INDEXER);
CoreModel.getDefault().setProjectDescription(bareProject, cDescription);
ManagedBuildManager.setDefaultConfiguration(bareProject, config );
ManagedBuildManager.setSelectedConfiguration(bareProject, config );
ManagedBuildManager.setNewProjectVersion(bareProject);
ManagedBuildManager.saveBuildInfo(bareProject, true);
return bareProject;
}
As I discovered when debugging, it is indeed important to set proper configurations and descriptions as the indexer was postponed so long as the project didn't have those features set. To get the configurations for the platform as a starting point for an initial configuration:
public static List<IConfiguration> getValidConfigsForPlatform() {
List<IConfiguration> configurations =
new ArrayList<IConfiguration>();
for (IConfiguration cfg : ManagedBuildManager.getExtensionConfigurations() ) {
IToolChain currentToolChain =
cfg.getToolChain();
if ( (currentToolChain != null ) &&
(ManagedBuildManager.isPlatformOk(currentToolChain) ) &&
(currentToolChain.isSupported() ) ) {
configurations.add(cfg);
}
}
return configurations;
}
This basically answers the second part of the question, and thus I can create a c project for the purposes of testing code using the index. The testing code still needs to do some work.
Testing Code
I create files in the the "src" folder in the project (created in the above code), and I either have to name them .c, or if I want to name them .h have them included by some .c file (otherwise the indexer won't see them). Finally, I can populate the files with some test code. To answer number 1,
I need to block on both auto refresh jobs in Eclipse and then the index:
public static void forceIndexUpdate(IProject project) throws Exception {
ICProject cProject = CoreModel.getDefault().create(project);
Job.getJobManager().join(ResourcesPlugin.FAMILY_AUTO_REFRESH, null);
CCorePlugin.getIndexManager().reindex(cProject);
CCorePlugin.getIndexManager().joinIndexer(IIndexManager.FOREVER, new NullProgressMonitor() );
assertTrue(CCorePlugin.getIndexManager().isIndexerIdle() );
assertFalse(CCorePlugin.getIndexManager().isIndexerSetupPostponed(cProject));
}
After I change the files in the project. This makes sure Eclipse is refreshed, and then makes sure the indexer completes without being postponed. Finally, I can run tests depending on the indexer.
And the last point, I was wrong about using IBinding. The correct way in which I was able to get the macros was using the method IIndex.findMacros(char[] name, IndexFilter filter, IProgressMonitor monitor)
I hope this helps at least someone out there. I would also appreciate it if there was some feedback regarding the validity of this solution, as this is simply the first solution I managed to create that worked. Just to confirm, I am not testing the indexer itself, but rather code I wrote that uses the indexer and I want to test it under as realistic conditions as I can given how critical it is.