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Soot: How to analyze a java file in a package?

I have two java files under the tests directory.
I use the following code to set up Soot for further analysis(i.e., construct a call graph) but meet an error of are the packages set properly?.
Main.java:
public class Main {
static void setupSoot() {
Options.v().set_prepend_classpath(true);
Options.v().set_process_dir(Collections.singletonList("./tests"));
Options.v().set_whole_program(true);
Scene.v().loadNecessaryClasses();
}
// Following function also doesn't work and has a similar error message
//static void setupSoot() {
// Options.v().set_prepend_classpath(true);
// Options.v().set_process_dir(Collections.singletonList("./tests"));
// Scene.v().loadClassAndSupport("FooBar");
//}
public static void main(String[] args) {
setupSoot();
// ....
}
}
And I get the following error message:
Exception in thread "main" java.lang.RuntimeException: Error: couldn't find class: FooBar are the packages set properly?
at soot.JastAddInitialResolver.resolveFromJavaFile(JastAddInitialResolver.java:119)
at soot.JavaClassSource.resolve(JavaClassSource.java:69)
at soot.SootResolver.bringToHierarchyUnchecked(SootResolver.java:253)
at soot.SootResolver.bringToHierarchy(SootResolver.java:221)
at soot.SootResolver.bringToSignatures(SootResolver.java:292)
at soot.SootResolver.bringToBodies(SootResolver.java:332)
at soot.SootResolver.processResolveWorklist(SootResolver.java:171)
at soot.SootResolver.resolveClass(SootResolver.java:141)
at soot.Scene.loadClass(Scene.java:1009)
at soot.Scene.loadClassAndSupport(Scene.java:994)
at soot.Scene.loadNecessaryClasses(Scene.java:1822)
at Main.setupSoot(Main.java:18)
at Main.main(Main.java:21)
If I complie two test files into .class files then I will get following error message:
Exception in thread "main" soot.SootResolver$SootClassNotFoundException: couldn't find class: tests.FooBar (is your soot-class-path set properly?)
at soot.SootResolver.bringToHierarchyUnchecked(SootResolver.java:245)
at soot.SootResolver.bringToHierarchy(SootResolver.java:221)
at soot.SootResolver.bringToSignatures(SootResolver.java:292)
at soot.SootResolver.bringToBodies(SootResolver.java:332)
at soot.SootResolver.processResolveWorklist(SootResolver.java:171)
at soot.SootResolver.resolveClass(SootResolver.java:141)
at soot.Scene.loadClass(Scene.java:1009)
at soot.Scene.loadClassAndSupport(Scene.java:994)
at soot.Scene.loadNecessaryClasses(Scene.java:1822)
at Main.setupSoot(Main.java:18)
at Main.main(Main.java:21)
I beleive that soot prepend_classpath is true since it works well when two test files are not in the package (i.e., remove package tests from both files).
Two files in tests directory are as follows:
Pack.java:
package tests;
public class Pack {
public static void main(String[] args) {
int s = 10;
}
}
FooBar.java
package tests;
public class FooBar {
public static void main(String[] args) {
FooBar callFooBar = new FooBar();
callFooBar.foo(10);
}
void foo(int a) {
bar(a);
}
void bar(int a) {
for (int i = 0; i < a; i++) {
i += a;
}
}
}

I solved this problem. The issue is that the path of the test files is wrong.
Now my project structure is as follows:
-ProjectRoot
|--src
|--Main.java
|--testers
|--easycase
|--FooBar.java
|--Pack.java
and My Main.java:
public class Main {
static void setupSoot() {
Options.v().set_prepend_classpath(true);
// Options.v().set_soot_classpath("xxxxx:xxxxx/xxxxx.jar") // For external packages
Options.v().set_process_dir(Collections.singletonList("./testers"));
Options.v().set_whole_program(true);
Scene.v().loadNecessaryClasses();
}
public static void main(String[] args) {
setupSoot();
Scene.v().loadAndSupport("esaycase.FooBar");
// Do something here
}
}
Note that the first line is package easycase; for both test files.

PHP/Java Bridge, How to pass parameter to constructor method when create the instance?

package test;
public class HelloWorld {
public static final String JAVABRIDGE_PORT = "8080";
static final php.java.bridge.JavaBridgeRunner runner = php.java.bridge.JavaBridgeRunner
.getInstance(JAVABRIDGE_PORT);
public static void main(String args[]) throws Exception {
runner.waitFor();
}
}
<?php require_once("/path/to/Java.inc");
$hello_world = new java("test.HelloWorld");
?>
I know the code above can create a HelloWorld instance.
But what if the constructor of HelloWorld.java has some parameters?How to write the php code?

here is my code,hope this can help you a bit.
php file:
**<?php require_once("C:/jetty-distribution-9.3.7.v20160115/webapps/JavaBridge/java/Java.inc");
$world = new java("HelloWorld");
echo $world->hello(array("from PHP"));
?>**
here $world is my object and you can pass the parameter of java in last line.

Exception Exception is not compatible with throws clause in Server.main(String[]) [duplicate]

This question already has answers here:
What are reasons for Exceptions not to be compatible with throws clauses?
(4 answers)
Closed 4 years ago.
I'm running the Lip reading code on Eclipse Indigo from the following link :
https://github.com/sagioto/LipReading/blob/master/lipreading-core/src/main/java/edu/lipreading/WebFeatureExtractor.java
package main.java.edu.lipreading;
import com.googlecode.javacpp.BytePointer;
import com.googlecode.javacv.cpp.opencv_core;
import main.java.edu.lipreading.vision.AbstractFeatureExtractor;
import main.java.edu.lipreading.vision.NoMoreStickersFeatureExtractor;
import org.eclipse.jetty.server.Server;
import org.eclipse.jetty.server.nio.SelectChannelConnector;
import org.eclipse.jetty.websocket.WebSocket;
import org.eclipse.jetty.websocket.WebSocketHandler;
import javax.servlet.http.HttpServletRequest;
import java.io.ByteArrayOutputStream;
import java.util.List;
import java.util.logging.Logger;
import static com.googlecode.javacv.cpp.opencv_core.CV_8UC1;
import static com.googlecode.javacv.cpp.opencv_core.cvMat;
import static com.googlecode.javacv.cpp.opencv_highgui.cvDecodeImage;
/**
* Created with IntelliJ IDEA.
* User: Sagi
* Date: 25/04/13
* Time: 21:47
*/
public class WebFeatureExtractor extends Server {
private final static Logger LOG = Logger.getLogger(WebFeatureExtractor.class.getSimpleName());
private final static AbstractFeatureExtractor fe = new NoMoreStickersFeatureExtractor();
public WebFeatureExtractor(int port) {
SelectChannelConnector connector = new SelectChannelConnector();
connector.setPort(port);
addConnector(connector);
WebSocketHandler wsHandler = new WebSocketHandler() {
public WebSocket doWebSocketConnect(HttpServletRequest request, String protocol) {
return new FeatureExtractorWebSocket();
}
};
setHandler(wsHandler);
}
/**
* Simple innerclass that is used to handle websocket connections.
*
* #author jos
*/
private static class FeatureExtractorWebSocket implements WebSocket, WebSocket.OnBinaryMessage, WebSocket.OnTextMessage {
private Connection connection;
public FeatureExtractorWebSocket() {
super();
}
/**
* On open we set the connection locally, and enable
* binary support
*/
#Override
public void onOpen(Connection connection) {
LOG.info("got connection open");
this.connection = connection;
this.connection.setMaxBinaryMessageSize(1024 * 512);
}
/**
* Cleanup if needed. Not used for this example
*/
#Override
public void onClose(int code, String message) {
LOG.info("got connection closed");
}
/**
* When we receive a binary message we assume it is an image. We then run this
* image through our face detection algorithm and send back the response.
*/
#Override
public void onMessage(byte[] data, int offset, int length) {
//LOG.info("got data message");
ByteArrayOutputStream bOut = new ByteArrayOutputStream();
bOut.write(data, offset, length);
try {
String result = convert(bOut.toByteArray());
this.connection.sendMessage(result);
} catch (Exception e) {
LOG.severe("Error in facedetection, ignoring message:" + e.getMessage());
}
}
#Override
public void onMessage(String data) {
LOG.info("got string message");
}
}
public static String convert(byte[] imageData) throws Exception {
opencv_core.IplImage originalImage = cvDecodeImage(cvMat(1, imageData.length, CV_8UC1, new BytePointer(imageData)));
List<Integer> points = fe.getPoints(originalImage);
if(points == null)
return "null";
String ans = "";
for (Integer point : points) {
ans += point + ",";
}
return ans;
}
/**
* Start the server on port 999
*/
public static void main(String[] args) throws Exception {
WebFeatureExtractor server = new WebFeatureExtractor(9999);
server.start();
server.join();
}
}
In the following line :
public static void main(String[] args) throws Exception {
I'm getting the following error :
Exception Exception is not compatible with throws clause in Server.main(String[])
Please help me solve this.

There are two condition you need to check.
1) when declaring a method in interface you need to add throws exception for that method and similarly with the interface implementation class where the method is implemented.
for example
service.java
#Component
public interface UserService {
User getUser(Login login) throws Exception;
}
serviceimpl.java
public User getUser(Login login)throws Exception
{
}
2) by doing the above statement the error still doesn't vanish. make sure to save both the files.

Doest the server API handle all exceptions for itself. Why not try removing the throws in your code. I know its not good programming practice but might solve the problem.

The problem is that the Server class you are extending already contains a public static void main(String[]) method that does not have the same throws declaration. I didn't take a look at it, but I'd bet that method doesn't throw anything at all.
A solution would be to remove your throws clause in your main method and rely on try-catches instead.
EDIT: Why you cannot add a different throws clause in your case.
Let's assume the following scenario:
class A {
public static void foo() throws SomeException { ... }
}
class B extends A {
public static void foo() throws DifferentException { ... }
}
The Java standard says you are hiding the A.foo() method (or at least trying to). Thing is, you're only allowed to do that if the throws clause in B.foo() is already contained in the clause of A.foo(). So for the above scenario, you're perfectly legal only if DifferentException is a subclass of SomeException. Otherwise the compiler will yell.

I had the same issue, in my case I have implemented a method from an interface that did not declared to throw an exception.
In your case, I would guess that Server class also has a main method that didn't throw an exception. To quickly solve it. I would declare Server.main to throw an exception.
This link helped me
What are reasons for Exceptions not to be compatible with throws clauses?

factory method pattern with class registration produces a nullpointer exception

well, i searched the internet to this problem but didn't find any proper solution
in http://www.oodesign.com/factory-pattern.html
the author described away to register classes using reflection or object creation
i tried the object creation approach by the following code:
the factory class
package com.mf.egyptse;
import java.util.HashMap;
public abstract class ParserFactory {
private static HashMap parsers;
static
{
parsers= new HashMap();
System.out.println("This is first static block");
}
static void putParser(Object key,Object parser)
{
parsers.put(key, parser);
}
static Object getParser(Object key)
{
return parsers.get(key);
}
}
each parser register itself in the factory:
public class NormalParser extends ParserFactory implements ParsingBehavior{
/**
* Define the number of nested columns or tags to be parsed
*/
final static int NO_OF_COLOUMNS = 13;
static String input = null;
static String[] elements= {"name","sector", "p.c", "open", "close", "chgpercent", "lastprice", "high", "low","value","volume","trades","marketcap"};
static
{
ParserFactory.putParser("normal", new NormalParser());
}
and the main is :
public class Main {
/**
* #param args
* #throws IOException
* #throws InterruptedException
*/
public static void main(String[] args) throws IOException, InterruptedException {
// NileParser.parseNile();
// OTCParser.parseOTC();
// NormalParser.parseNormal();
ParsingBehavior parser = (ParsingBehavior) ParserFactory.getParser("normal");
parser.parseToXML(null, null);
}
}
the interface is:
package com.mf.egyptse;
import java.io.File;
import java.io.IOException;
public interface ParsingBehavior {
void parseToXML(CharSequence input,File file) throws IOException;
}
this code return always nullpointer exception while executing. the porblem is that the static block don't executed. so what is the solution ?

As answered by "Snicolas", your problem is that the HashMap is not populated by the time its being used. Your static block in main should load all the necessary parser classes such that these classes register themselves first.
public class Main {
static {
// Load necessary parser classes
Class.forName("normal");
}
/**
* #param args
* #throws IOException
* #throws InterruptedException
*/
public static void main(String[] args) throws IOException, InterruptedException {
ParsingBehavior parser = (ParsingBehavior) ParserFactory.getParser("normal");
parser.parseToXML(null, null);
}
}

Getparser should return a ParsingBehavior.
Cast inside it.
But your problem comes from the fact that your parser class is not loaded by the jvm, as it is not used by your main. So static code is not executed.
Your are mixing your factory with a bus. Let the main register your parser in the factory.

Simple App Won't Compile in Eclipse (with plugin)?

my code, being practically identical to the code given in BlackBerry's tutorial, has a syntax error in Eclipse. i'm sure there is some small but i'm just not seeing, but my coworker could not find it as well. any ideas would be greatly appreciated. thanks!
Code:
pushScreen(new ABCScreen());
Error:
Cannot make a static reference to the
non-static method pushScreen(Screen)
from the type UiApplication
here is the complete source:
import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.MainScreen;
public class AwesomeBBCalculator extends UiApplication {
public AwesomeBBCalculator() {
AwesomeBBCalculator app = new AwesomeBBCalculator();
app.enterEventDispatcher();
}
public static void main(String[] args) {
pushScreen(new ABCScreen()); // ERROR LINE
}
}
final class ABCScreen extends MainScreen {
public ABCScreen() {
super();
// add title
LabelField title = new LabelField("Awesome BlackBerry Calculator",
LabelField.ELLIPSIS | LabelField.USE_ALL_WIDTH);
setTitle(title);
}
public boolean onClose() {
Dialog.alert("Thanks for using the Awesome BlackBerry Calculator!\nGoodbye.");
System.exit(0);
return true;
}
}

The pushScreen method can only be called within an instance of UiApplication. You are trying to call it from a static main method. That does not work. Do this instead...
public void foo()
{
pushScreen(this);
}
public static void main(String[] args)
{
(new ABCScreen()).foo();
}

public void class1()
{
pushScreen(this);
}
public static void main(String[] args)
{
(new NewScreen()).class1();
}

try making an object for the ABCScreen class and then use it or u may try this also:
UiApplication.getUiApplication().pushScreen(new ABCScreen());