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package org.junit.runner;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.junit.internal.Classes;
import org.junit.runner.FilterFactory.FilterNotCreatedException;
import org.junit.runner.manipulation.Filter;
import org.junit.runners.model.InitializationError;
class JUnitCommandLineParseResult {
private final List<String> filterSpecs = new ArrayList<String>();
private final List<Class<?>> classes = new ArrayList<Class<?>>();
private final List<Throwable> parserErrors = new ArrayList<Throwable>();
/**
* Do not use. Testing purposes only.
*/
JUnitCommandLineParseResult() {}
/**
* Returns filter specs parsed from command line.
*/
public List<String> getFilterSpecs() {
return Collections.unmodifiableList(filterSpecs);
}
/**
* Returns test classes parsed from command line.
*/
public List<Class<?>> getClasses() {
return Collections.unmodifiableList(classes);
}
/**
* Parses the arguments.
*
* @param args Arguments
*/
public static JUnitCommandLineParseResult parse(String[] args) {
JUnitCommandLineParseResult result = new JUnitCommandLineParseResult();
result.parseArgs(args);
return result;
}
private void parseArgs(String[] args) {
parseParameters(parseOptions(args));
}
String[] parseOptions(String... args) {
for (int i = 0; i != args.length; ++i) {
String arg = args[i];
if (arg.equals("--")) {
return copyArray(args, i + 1, args.length);
} else if (arg.startsWith("--")) {
if (arg.startsWith("--filter=") || arg.equals("--filter")) {
String filterSpec;
if (arg.equals("--filter")) {
++i;
if (i < args.length) {
filterSpec = args[i];
} else {
parserErrors.add(new CommandLineParserError(arg + " value not specified"));
break;
}
} else {
filterSpec = arg.substring(arg.indexOf('=') + 1);
}
filterSpecs.add(filterSpec);
} else {
parserErrors.add(new CommandLineParserError("JUnit knows nothing about the " + arg + " option"));
}
} else {
return copyArray(args, i, args.length);
}
}
return new String[]{};
}
private String[] copyArray(String[] args, int from, int to) {
String[] result = new String[to - from];
for (int j = from; j != to; ++j) {
result[j - from] = args[j];
}
return result;
}
void parseParameters(String[] args) {
for (String arg : args) {
try {
classes.add(Classes.getClass(arg));
} catch (ClassNotFoundException e) {
parserErrors.add(new IllegalArgumentException("Could not find class [" + arg + "]", e));
}
}
}
private Request errorReport(Throwable cause) {
return Request.errorReport(JUnitCommandLineParseResult.class, cause);
}
/**
* Creates a {@link Request}.
*
* @param computer {@link Computer} to be used.
*/
public Request createRequest(Computer computer) {
if (parserErrors.isEmpty()) {
Request request = Request.classes(
computer, classes.toArray(new Class<?>[classes.size()]));
return applyFilterSpecs(request);
} else {
return errorReport(new InitializationError(parserErrors));
}
}
private Request applyFilterSpecs(Request request) {
try {
for (String filterSpec : filterSpecs) {
Filter filter = FilterFactories.createFilterFromFilterSpec(
request, filterSpec);
request = request.filterWith(filter);
}
return request;
} catch (FilterNotCreatedException e) {
return errorReport(e);
}
}
/**
* Exception used if there's a problem parsing the command line.
*/
public static class CommandLineParserError extends Exception {
private static final long serialVersionUID= 1L;
public CommandLineParserError(String message) {
super(message);
}
}
}
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