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The ToolBox.java Java example source code
/*
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.net.URI;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.tools.JavaCompiler;
import javax.tools.JavaFileObject;
import javax.tools.SimpleJavaFileObject;
import javax.tools.ToolProvider;
import com.sun.source.util.JavacTask;
import com.sun.tools.javac.api.JavacTaskImpl;
import sun.tools.jar.Main;
import static java.nio.file.StandardCopyOption.*;
/**
* Toolbox for jtreg tests.
*/
public class ToolBox {
public static final String lineSeparator = System.getProperty("line.separator");
public static final String jdkUnderTest = System.getProperty("test.jdk");
public static final Path javaBinary = Paths.get(jdkUnderTest, "bin", "java");
public static final Path javacBinary = Paths.get(jdkUnderTest, "bin", "javac");
public static final List<String> testToolVMOpts;
public static final List<String> testVMOpts;
private static final Charset defaultCharset = Charset.defaultCharset();
static final JavaCompiler comp = ToolProvider.getSystemJavaCompiler();
static {
String sysProp = System.getProperty("test.tool.vm.opts");
if (sysProp != null && sysProp.length() > 0) {
testToolVMOpts = Arrays.asList(sysProp.split("\\s+"));
} else {
testToolVMOpts = Collections.<String>emptyList();
}
sysProp = System.getProperty("test.vm.opts");
if (sysProp != null && sysProp.length() > 0) {
testVMOpts = Arrays.asList(sysProp.split("\\s+"));
} else {
testVMOpts = Collections.<String>emptyList();
}
}
/**
* The expected result of command-like method execution.
*/
public enum Expect {SUCCESS, FAIL}
enum AcceptedParams {
EXPECT,
SOURCES,
OPTIONS,
STD_OUTPUT,
ERR_OUTPUT,
EXTRA_ENV,
}
enum OutputKind {STD, ERR}
/**
* Helper class to abstract the processing of command's output.
*/
static abstract class WriterHelper {
OutputKind kind;
public abstract void pipeOutput(ProcessBuilder pb);
public abstract void readFromStream(Process p) throws IOException;
public abstract void addAll(Collection<? extends String> c) throws IOException;
}
/**
* Helper class for redirecting command's output to a file.
*/
static class FileWriterHelper extends WriterHelper {
File file;
FileWriterHelper(File file, OutputKind kind) {
this.file = file;
this.kind = kind;
}
@Override
public void pipeOutput(ProcessBuilder pb) {
if (file != null) {
switch (kind) {
case STD:
pb.redirectInput(file);
break;
case ERR:
pb.redirectError(file);
break;
}
}
}
@Override
public void readFromStream(Process p) throws IOException {}
@Override
public void addAll(Collection<? extends String> c) throws IOException {
if (file.exists())
Files.write(file.toPath(), c, defaultCharset,
StandardOpenOption.WRITE, StandardOpenOption.APPEND);
else
Files.write(file.toPath(), c, defaultCharset);
}
}
/**
* Helper class for redirecting command's output to a String list.
*/
static class ListWriterHelper extends WriterHelper {
List<String> list;
public ListWriterHelper(List<String> list, OutputKind kind) {
this.kind = kind;
this.list = list;
}
@Override
public void pipeOutput(ProcessBuilder pb) {}
@Override
public void readFromStream(Process p) throws IOException {
BufferedReader br = null;
switch (kind) {
case STD:
br = new BufferedReader(new InputStreamReader(p.getInputStream()));
break;
case ERR:
br = new BufferedReader(new InputStreamReader(p.getErrorStream()));
break;
}
String line;
while ((line = br.readLine()) != null) {
list.add(line);
}
}
public void addAll(Collection<? extends String> c) {
list.addAll(c);
}
}
/**
* Simple factory class for creating a WriterHelper instance.
*/
static class WriterHelperFactory {
static WriterHelper make(File file, OutputKind kind) {
return new FileWriterHelper(file, kind);
}
static WriterHelper make(List<String> list, OutputKind kind) {
return new ListWriterHelper(list, kind);
}
}
/**
* A generic class for holding command's arguments.
*/
public static abstract class GenericArgs <T extends GenericArgs> {
protected static List<Set minAcceptedParams;
protected Set<AcceptedParams> currentParams =
EnumSet.<AcceptedParams>noneOf(AcceptedParams.class);
protected Expect whatToExpect;
protected WriterHelper stdOutput;
protected WriterHelper errOutput;
protected List<String> args = new ArrayList<>();
protected String[] argsArr;
protected GenericArgs() {
set(Expect.SUCCESS);
}
public T set(Expect whatToExpt) {
currentParams.add(AcceptedParams.EXPECT);
this.whatToExpect = whatToExpt;
return (T)this;
}
public T setStdOutput(List<String> stdOutput) {
currentParams.add(AcceptedParams.STD_OUTPUT);
this.stdOutput = WriterHelperFactory.make(stdOutput, OutputKind.STD);
return (T)this;
}
public T setStdOutput(File output) {
currentParams.add(AcceptedParams.STD_OUTPUT);
this.stdOutput = WriterHelperFactory.make(output, OutputKind.STD);
return (T)this;
}
public T setErrOutput(List<String> errOutput) {
currentParams.add(AcceptedParams.ERR_OUTPUT);
this.errOutput = WriterHelperFactory.make(errOutput, OutputKind.ERR);
return (T)this;
}
public T setErrOutput(File errOutput) {
currentParams.add(AcceptedParams.ERR_OUTPUT);
this.errOutput = WriterHelperFactory.make(errOutput, OutputKind.ERR);
return (T)this;
}
public T setAllArgs(String... args) {
currentParams.add(AcceptedParams.OPTIONS);
this.argsArr = args;
return (T) this;
}
public T appendArgs(String... args) {
appendArgs(Arrays.asList(args));
return (T)this;
}
public T appendArgs(Path... args) {
if (args != null) {
List<String> list = new ArrayList<>();
for (int i = 0; i < args.length; i++) {
if (args[i] != null) {
list.add(args[i].toString());
}
}
appendArgs(list);
}
return (T)this;
}
public T appendArgs(List<String> args) {
if (args != null && args.size() > 0) {
currentParams.add(AcceptedParams.OPTIONS);
for (int i = 0; i < args.size(); i++) {
if (args.get(i) != null) {
this.args.add(args.get(i));
}
}
}
return (T)this;
}
public T setOptions(List<String> options) {
currentParams.add(AcceptedParams.OPTIONS);
this.args = options;
return (T)this;
}
public T setOptions(String... options) {
currentParams.add(AcceptedParams.OPTIONS);
this.args = Arrays.asList(options);
return (T)this;
}
public boolean hasMinParams() {
for (Set<AcceptedParams> minSet : minAcceptedParams) {
if (currentParams.containsAll(minSet)) {
return true;
}
}
return false;
}
}
/**
* A more specific class for holding javac-like command's arguments.
*/
public static class JavaToolArgs extends GenericArgs<JavaToolArgs> {
static {
minAcceptedParams = new ArrayList<>();
minAcceptedParams.add(EnumSet.<AcceptedParams>of(
AcceptedParams.EXPECT, AcceptedParams.OPTIONS));
minAcceptedParams.add(EnumSet.<AcceptedParams>of(
AcceptedParams.EXPECT, AcceptedParams.SOURCES));
}
protected List<? extends JavaFileObject> sources;
public JavaToolArgs() {
super();
}
public JavaToolArgs(Expect whatToExpt) {
super.set(whatToExpt);
}
public JavaToolArgs setSources(List<? extends JavaFileObject> sources) {
currentParams.add(AcceptedParams.SOURCES);
this.sources = sources;
return this;
}
public JavaToolArgs setSources(JavaSource... sources) {
return setSources(Arrays.asList(sources));
}
public JavaToolArgs setSources(String... sources) {
List<JavaSource> javaSrcs = new ArrayList<>();
for (String source : sources) {
javaSrcs.add(new JavaSource(source));
}
return setSources(javaSrcs);
}
}
/**
* A more specific class for holding any command's arguments.
*/
public static class AnyToolArgs extends GenericArgs<AnyToolArgs> {
static {
minAcceptedParams = new ArrayList<>();
minAcceptedParams.add(EnumSet.<AcceptedParams>of(
AcceptedParams.EXPECT, AcceptedParams.OPTIONS));
}
Map<String, String> extraEnv;
public AnyToolArgs() {
super();
}
public AnyToolArgs(Expect whatToExpt) {
set(whatToExpt);
}
public AnyToolArgs set(Map<String, String> extraEnv) {
currentParams.add(AcceptedParams.EXTRA_ENV);
this.extraEnv = extraEnv;
return this;
}
}
/**
* Custom exception for bad command execution.
*/
public static class CommandExecutionException extends Exception {
CommandExecutionException(List<String> command, Expect whatToExpt) {
super(createMessage(command, whatToExpt));
}
CommandExecutionException(Expect whatToExpt, String... command) {
this(Arrays.asList(command), whatToExpt);
}
private static String createMessage(List<String> command, Expect whatToExpt) {
StringBuilder sb = new StringBuilder().append("Command : ");
sb.append(command.toString()).append(lineSeparator);
switch (whatToExpt) {
case SUCCESS:
sb.append(" has unexpectedly failed");
break;
case FAIL:
sb.append(" has been unexpectedly successful");
break;
}
return sb.toString();
}
}
/**
* Custom exception for not equal resources.
*/
public static class ResourcesNotEqualException extends Exception {
public ResourcesNotEqualException(List<String> res1, List res2) {
super(createMessage(res1, res2));
}
public ResourcesNotEqualException(String line1, String line2) {
super(createMessage(line1, line2));
}
public ResourcesNotEqualException(Path path1, Path path2) {
super(createMessage(path1, path2));
}
private static String createMessage(Path path1, Path path2) {
return new StringBuilder()
.append("The resources provided for comparison in paths \n")
.append(path1.toString()).append(" and \n")
.append(path2.toString()).append("are different").toString();
}
private static String createMessage(String line1, String line2) {
return new StringBuilder()
.append("The resources provided for comparison are different at lines: \n")
.append(line1).append(" and \n")
.append(line2).toString();
}
private static String createMessage(List<String> res1, List res2) {
return new StringBuilder()
.append("The resources provided for comparison are different: \n")
.append("Resource 1 is: ").append(res1).append("\n and \n")
.append("Resource 2 is: ").append(res2).append("\n").toString();
}
}
/**
* A javac compiler caller method.
*/
public static int javac(JavaToolArgs params)
throws CommandExecutionException, IOException {
if (params.hasMinParams()) {
if (params.argsArr != null) {
return genericJavaCMD(JavaCMD.JAVAC, params);
} else {
return genericJavaCMD(JavaCMD.JAVAC_API, params);
}
}
throw new AssertionError("javac command has been invoked with less parameters than needed");
}
/**
* A javap calling method.
*/
public static String javap(JavaToolArgs params)
throws CommandExecutionException, IOException {
if (params.hasMinParams()) {
List<String> list = new ArrayList<>();
params.setErrOutput(list);
genericJavaCMD(JavaCMD.JAVAP, params);
return listToString(list);
}
throw new AssertionError("javap command has been invoked with less parameters than needed");
}
/**
* A javah calling method.
*/
public static int javah(JavaToolArgs params)
throws CommandExecutionException, IOException {
if (params.hasMinParams()) {
return genericJavaCMD(JavaCMD.JAVAH, params);
}
throw new AssertionError("javah command has been invoked with less parameters than needed");
}
/**
* A enum class for langtools commands.
*/
enum JavaCMD {
JAVAC {
@Override
int run(JavaToolArgs params, PrintWriter pw) {
return com.sun.tools.javac.Main.compile(params.argsArr, pw);
}
},
JAVAC_API {
@Override
int run(JavaToolArgs params, PrintWriter pw) {
JavacTask ct = (JavacTask)comp.getTask(pw, null, null,
params.args, null, params.sources);
return ((JavacTaskImpl)ct).doCall().exitCode;
}
@Override
String getName() {
return "javac";
}
@Override
List<String> getExceptionMsgContent(JavaToolArgs params) {
List<String> result = super.getExceptionMsgContent(params);
for (JavaFileObject source : params.sources) {
if (source instanceof JavaSource) {
result.add(((JavaSource)source).name);
}
}
return result;
}
},
JAVAH {
@Override
int run(JavaToolArgs params, PrintWriter pw) {
return com.sun.tools.javah.Main.run(params.argsArr, pw);
}
},
JAVAP {
@Override
int run(JavaToolArgs params, PrintWriter pw) {
return com.sun.tools.javap.Main.run(params.argsArr, pw);
}
};
abstract int run(JavaToolArgs params, PrintWriter pw);
String getName() {
return this.name().toLowerCase();
}
List<String> getExceptionMsgContent(JavaToolArgs params) {
List<String> result = new ArrayList<>();
result.add(getName());
result.addAll(params.argsArr != null ?
Arrays.asList(params.argsArr) :
params.args);
return result;
}
}
/**
* A helper method for executing langtools commands.
*/
private static int genericJavaCMD(
JavaCMD cmd,
JavaToolArgs params)
throws CommandExecutionException, IOException {
int rc = 0;
StringWriter sw = null;
try (PrintWriter pw = (params.errOutput == null) ?
null : new PrintWriter(sw = new StringWriter())) {
rc = cmd.run(params, pw);
}
String out = (sw == null) ? null : sw.toString();
if (params.errOutput != null && (out != null) && !out.isEmpty()) {
params.errOutput.addAll(splitLines(out, lineSeparator));
}
if ( (rc == 0 && params.whatToExpect == Expect.SUCCESS) ||
(rc != 0 && params.whatToExpect == Expect.FAIL) ) {
return rc;
}
throw new CommandExecutionException(cmd.getExceptionMsgContent(params),
params.whatToExpect);
}
/**
* A jar calling method.
*/
public static boolean jar(String... params) throws CommandExecutionException {
Main jarGenerator = new Main(System.out, System.err, "jar");
boolean result = jarGenerator.run(params);
if (!result) {
List<String> command = new ArrayList<>();
command.add("jar");
command.addAll(Arrays.asList(params));
throw new CommandExecutionException(command, Expect.SUCCESS);
}
return result;
}
/**
* A general command calling method.
*/
public static int executeCommand(AnyToolArgs params)
throws CommandExecutionException, IOException, InterruptedException {
if (params.hasMinParams()) {
List<String> cmd = (params.args != null) ?
params.args :
Arrays.asList(params.argsArr);
return executeCommand(cmd, params.extraEnv, params.stdOutput,
params.errOutput, params.whatToExpect);
}
throw new AssertionError("command has been invoked with less parameters than needed");
}
/**
* A helper method for calling a general command.
*/
private static int executeCommand(
List<String> command,
Map<String, String> extraEnv,
WriterHelper stdOutput,
WriterHelper errOutput,
Expect whatToExpt)
throws IOException, InterruptedException, CommandExecutionException {
ProcessBuilder pb = new ProcessBuilder(command);
if (stdOutput != null) stdOutput.pipeOutput(pb);
if (errOutput != null) errOutput.pipeOutput(pb);
if (extraEnv != null) {
pb.environment().putAll(extraEnv);
}
Process p = pb.start();
if (stdOutput != null) stdOutput.readFromStream(p);
if (errOutput != null) errOutput.readFromStream(p);
int result = p.waitFor();
if ( (result == 0 && whatToExpt == Expect.SUCCESS) ||
(result != 0 && whatToExpt == Expect.FAIL) ) {
return result;
}
throw new CommandExecutionException(command, whatToExpt);
}
/**
* This set of methods can be used instead of diff when the only needed
* result is the equality or inequality of the two given resources.
*
* A resource can be a file or a String list.
*/
public static void compareLines(Path aPath, Path otherPath, String encoding)
throws FileNotFoundException, IOException, ResourcesNotEqualException {
compareLines(aPath, otherPath, encoding, false);
}
public static void compareLines(
Path aPath, Path otherPath, String encoding, boolean trim)
throws FileNotFoundException, IOException, ResourcesNotEqualException {
Charset charset = encoding != null ?
Charset.forName(encoding) :
defaultCharset;
List<String> list1 = Files.readAllLines(aPath, charset);
List<String> list2 = Files.readAllLines(otherPath, charset);
compareLines(list1, list2, trim);
}
public static void compareLines(Path path, List<String> strings, String encoding)
throws FileNotFoundException, IOException, ResourcesNotEqualException {
compareLines(path, strings, encoding, false);
}
public static void compareLines(Path path, List<String> strings,
String encoding, boolean trim)
throws FileNotFoundException, IOException, ResourcesNotEqualException {
Charset charset = encoding != null ?
Charset.forName(encoding) :
defaultCharset;
List<String> list = Files.readAllLines(path, charset);
compareLines(list, strings, trim);
}
public static void compareLines(List<String> list1, List list2)
throws ResourcesNotEqualException {
compareLines(list1, list2, false);
}
public static void compareLines(List<String> list1,
List<String> list2, boolean trim) throws ResourcesNotEqualException {
if ((list1 == list2) || (list1 == null && list2 == null)) return;
if (list1.size() != list2.size())
throw new ResourcesNotEqualException(list1, list2);
int i = 0;
int j = 0;
while (i < list1.size() &&
j < list2.size() &&
equals(list1.get(i), list2.get(j), trim)) {
i++; j++;
}
if (!(i == list1.size() && j == list2.size()))
throw new ResourcesNotEqualException(list1, list2);
}
private static boolean equals(String s1, String s2, boolean trim) {
return (trim ? s1.trim().equals(s2.trim()) : s1.equals(s2));
}
/**
* A set of simple grep-like methods, looks for regExpr in text.
* The content of text is split using the new line character as a pattern
* and later the regExpr is seek in every split line. If a match is found,
* the whole line is added to the result.
*/
public static List<String> grep(String regExpr, String text, String sep) {
return grep(regExpr, splitLines(text, sep));
}
public static List<String> grep(String regExpr, List text) {
List<String> result = new ArrayList<>();
Pattern pattern = Pattern.compile(regExpr);
for (String s : text) {
if (pattern.matcher(s).find()) {
result.add(s);
}
}
return result;
}
public static List<String> grep(String regExpr, File f)
throws IOException {
List<String> lines = Files.readAllLines(f.toPath(), defaultCharset);
return grep(regExpr, lines);
}
/**
* A touch-like method.
*/
public static boolean touch(String fileName) {
File file = new File(fileName);
return touch(file);
}
public static boolean touch(File file) {
if (file.exists()) {
file.setLastModified(System.currentTimeMillis());
return true;
}
return false;
}
public static void createJavaFile(File outFile) throws IOException {
createJavaFile(outFile, null);
}
/**
* A method for creating a valid but very simple java file.
*/
public static void createJavaFile(File outFile, File superClass)
throws IOException {
String srcStr = "public class " + getSimpleName(outFile) + " ";
if (superClass != null) {
srcStr = srcStr.concat("extends " + getSimpleName(superClass) + " ");
}
srcStr = srcStr.concat("{}");
try (PrintWriter ps = new PrintWriter(new FileWriter(outFile))) {
ps.println(srcStr);
}
}
/**
* Creates a java file name given its source.
* The file is created in the working directory, creating a directory
* tree if there is a package declaration.
*/
public static void createJavaFileFromSource(String source) throws IOException {
createJavaFileFromSource(null, source);
}
/**
* Creates a java file name given its source.
* The file is created in the working directory, creating a directory
* tree if there is a package declaration or the argument initialPath
* has a valid path.
*
* e.i. if initialPath is foo/ and the source is:
* package bar;
*
* public class bazz {}
*
* this method will create the file foo/bar/bazz.java in the working
* directory.
*/
public static void createJavaFileFromSource(Path initialPath,
String source) throws IOException {
String fileName = getJavaFileNameFromSource(source);
String dirTree = getDirTreeFromSource(source);
Path path = (dirTree != null) ?
Paths.get(dirTree, fileName) :
Paths.get(fileName);
path = (initialPath != null) ?
initialPath.resolve(path):
path;
writeFile(path, source);
}
static Pattern publicClassPattern =
Pattern.compile("public\\s+(?:class|enum|interface){1}\\s+(\\w+)");
static Pattern packageClassPattern =
Pattern.compile("(?:class|enum|interface){1}\\s+(\\w+)");
/**
* Extracts the java file name from the class declaration.
* This method is intended for simple files and uses regular expressions,
* so comments matching the pattern can make the method fail.
*/
private static String getJavaFileNameFromSource(String source) {
String className = null;
Matcher matcher = publicClassPattern.matcher(source);
if (matcher.find()) {
className = matcher.group(1) + ".java";
} else {
matcher = packageClassPattern.matcher(source);
if (matcher.find()) {
className = matcher.group(1) + ".java";
} else {
throw new AssertionError("Could not extract the java class " +
"name from the provided source");
}
}
return className;
}
static Pattern packagePattern =
Pattern.compile("package\\s+(((?:\\w+\\.)*)(?:\\w+))");
/**
* Extracts the path from the package declaration if present.
* This method is intended for simple files and uses regular expressions,
* so comments matching the pattern can make the method fail.
*/
private static String getDirTreeFromSource(String source) {
Matcher matcher = packagePattern.matcher(source);
return matcher.find() ?
matcher.group(1).replace(".", File.separator) :
null;
}
/**
* A method for creating a jar's manifest file with supplied data.
*/
public static void mkManifestWithClassPath(String mainClass,
String... classes) throws IOException {
List <String> lines = new ArrayList<>();
StringBuilder sb = new StringBuilder("Class-Path: ".length() +
classes[0].length()).append("Class-Path: ").append(classes[0]);
for (int i = 1; i < classes.length; i++) {
sb.append(" ").append(classes[i]);
}
lines.add(sb.toString());
if (mainClass != null) {
lines.add(new StringBuilder("Main-Class: ".length() +
mainClass.length())
.append("Main-Class: ")
.append(mainClass).toString());
}
Files.write(Paths.get("MANIFEST.MF"), lines, null);
}
/**
* A utility method to obtain the file name.
*/
static String getSimpleName(File inFile) {
return inFile.toPath().getFileName().toString();
}
/**
* A method to write to a file, the directory tree is created if needed.
*/
public static File writeFile(Path path, String body) throws IOException {
File result;
if (path.getParent() != null) {
Files.createDirectories(path.getParent());
}
try (FileWriter out = new FileWriter(result = path.toAbsolutePath().toFile())) {
out.write(body);
}
return result;
}
public static File writeFile(String path, String body) throws IOException {
return writeFile(Paths.get(path), body);
}
/**
* A rm-like method, the file is deleted only if it exists.
*/
public static void rm(Path path) throws Exception {
Files.deleteIfExists(path);
}
public static void rm(String filename) throws Exception {
rm(Paths.get(filename));
}
public static void rm(File f) throws Exception {
rm(f.toPath());
}
/**
* Copy source file to destination file.
*/
public static void copyFile(File destfile, File srcfile)
throws IOException {
copyFile(destfile.toPath(), srcfile.toPath());
}
public static void copyFile(Path destPath, Path srcPath)
throws IOException {
Files.createDirectories(destPath);
Files.copy(srcPath, destPath, REPLACE_EXISTING);
}
/**
* Splits a String using the System's line separator character as splitting point.
*/
public static List<String> splitLines(String lines, String sep) {
return Arrays.asList(lines.split(sep));
}
/**
* Converts a String list into one String by appending the System's line separator
* character after each component.
*/
private static String listToString(List<String> lines) {
StringBuilder sb = new StringBuilder();
for (String s : lines) {
sb.append(s).append(lineSeparator);
}
return sb.toString();
}
/**
* Returns true if the OS is a Windows version.
*/
public static boolean isWindows() {
String osName = System.getProperty("os.name");
return osName.toUpperCase().startsWith("WINDOWS");
}
/**
* Class representing an in-memory java source file. It is able to extract
* the file name from simple source codes using regular expressions.
*/
public static class JavaSource extends SimpleJavaFileObject {
String source;
String name;
public JavaSource(String className, String source) {
super(URI.create(className),
JavaFileObject.Kind.SOURCE);
this.name = className;
this.source = source;
}
public JavaSource(String source) {
super(URI.create(getJavaFileNameFromSource(source)),
JavaFileObject.Kind.SOURCE);
this.name = getJavaFileNameFromSource(source);
this.source = source;
}
@Override
public CharSequence getCharContent(boolean ignoreEncodingErrors) {
return source;
}
}
}
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