JDK14/Java14源码在线阅读
/*
* Copyright (c) 2007, 2019, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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.
*/
package com.sun.tools.javap;
import java.io.EOFException;
import java.io.FileNotFoundException;
import java.io.FilterInputStream;
import java.io.InputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.StringWriter;
import java.io.Writer;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLConnection;
import java.nio.file.NoSuchFileException;
import java.security.DigestInputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.Objects;
import java.util.ResourceBundle;
import java.util.Set;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.NestingKind;
import javax.tools.Diagnostic;
import javax.tools.DiagnosticListener;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileManager.Location;
import javax.tools.JavaFileObject;
import javax.tools.StandardJavaFileManager;
import javax.tools.StandardLocation;
import com.sun.tools.classfile.*;
/**
* "Main" class for javap, normally accessed from the command line
* via Main, or from JSR199 via DisassemblerTool.
*
* <p><b>This is NOT part of any supported API.
* If you write code that depends on this, you do so at your own risk.
* This code and its internal interfaces are subject to change or
* deletion without notice.</b>
*/
public class JavapTask implements DisassemblerTool.DisassemblerTask, Messages {
public class BadArgs extends Exception {
static final long serialVersionUID = 8765093759964640721L;
BadArgs(String key, Object... args) {
super(JavapTask.this.getMessage(key, args));
this.key = key;
this.args = args;
}
BadArgs showUsage(boolean b) {
showUsage = b;
return this;
}
final String key;
final Object[] args;
boolean showUsage;
}
static abstract class Option {
Option(boolean hasArg, String... aliases) {
this.hasArg = hasArg;
this.aliases = aliases;
}
boolean matches(String opt) {
for (String a: aliases) {
if (a.equals(opt))
return true;
}
return false;
}
boolean ignoreRest() {
return false;
}
abstract void process(JavapTask task, String opt, String arg) throws BadArgs;
final boolean hasArg;
final String[] aliases;
}
static final Option[] recognizedOptions = {
new Option(false, "-help", "--help", "-?", "-h") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.help = true;
}
},
new Option(false, "-version") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.version = true;
}
},
new Option(false, "-fullversion") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.fullVersion = true;
}
},
new Option(false, "-v", "-verbose", "-all") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.verbose = true;
task.options.showDescriptors = true;
task.options.showFlags = true;
task.options.showAllAttrs = true;
}
},
new Option(false, "-l") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.showLineAndLocalVariableTables = true;
}
},
new Option(false, "-public") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.accessOptions.add(opt);
task.options.showAccess = AccessFlags.ACC_PUBLIC;
}
},
new Option(false, "-protected") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.accessOptions.add(opt);
task.options.showAccess = AccessFlags.ACC_PROTECTED;
}
},
new Option(false, "-package") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.accessOptions.add(opt);
task.options.showAccess = 0;
}
},
new Option(false, "-p", "-private") {
@Override
void process(JavapTask task, String opt, String arg) {
if (!task.options.accessOptions.contains("-p") &&
!task.options.accessOptions.contains("-private")) {
task.options.accessOptions.add(opt);
}
task.options.showAccess = AccessFlags.ACC_PRIVATE;
}
},
new Option(false, "-c") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.showDisassembled = true;
}
},
new Option(false, "-s") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.showDescriptors = true;
}
},
new Option(false, "-sysinfo") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.sysInfo = true;
}
},
new Option(false, "-XDdetails") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.details = EnumSet.allOf(InstructionDetailWriter.Kind.class);
}
},
new Option(false, "-XDdetails:") {
@Override
boolean matches(String opt) {
int sep = opt.indexOf(":");
return sep != -1 && super.matches(opt.substring(0, sep + 1));
}
@Override
void process(JavapTask task, String opt, String arg) throws BadArgs {
int sep = opt.indexOf(":");
for (String v: opt.substring(sep + 1).split("[,: ]+")) {
if (!handleArg(task, v))
throw task.new BadArgs("err.invalid.arg.for.option", v);
}
}
boolean handleArg(JavapTask task, String arg) {
if (arg.length() == 0)
return true;
if (arg.equals("all")) {
task.options.details = EnumSet.allOf(InstructionDetailWriter.Kind.class);
return true;
}
boolean on = true;
if (arg.startsWith("-")) {
on = false;
arg = arg.substring(1);
}
for (InstructionDetailWriter.Kind k: InstructionDetailWriter.Kind.values()) {
if (arg.equalsIgnoreCase(k.option)) {
if (on)
task.options.details.add(k);
else
task.options.details.remove(k);
return true;
}
}
return false;
}
},
new Option(false, "-constants") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.showConstants = true;
}
},
new Option(false, "-XDinner") {
@Override
void process(JavapTask task, String opt, String arg) {
task.options.showInnerClasses = true;
}
},
new Option(false, "-XDindent:") {
@Override
boolean matches(String opt) {
int sep = opt.indexOf(":");
return sep != -1 && super.matches(opt.substring(0, sep + 1));
}
@Override
void process(JavapTask task, String opt, String arg) throws BadArgs {
int sep = opt.indexOf(":");
try {
int i = Integer.valueOf(opt.substring(sep + 1));
if (i > 0) // silently ignore invalid values
task.options.indentWidth = i;
} catch (NumberFormatException e) {
}
}
},
new Option(false, "-XDtab:") {
@Override
boolean matches(String opt) {
int sep = opt.indexOf(":");
return sep != -1 && super.matches(opt.substring(0, sep + 1));
}
@Override
void process(JavapTask task, String opt, String arg) throws BadArgs {
int sep = opt.indexOf(":");
try {
int i = Integer.valueOf(opt.substring(sep + 1));
if (i > 0) // silently ignore invalid values
task.options.tabColumn = i;
} catch (NumberFormatException e) {
}
}
},
new Option(true, "--module", "-m") {
@Override
void process(JavapTask task, String opt, String arg) throws BadArgs {
task.options.moduleName = arg;
}
}
};
public JavapTask() {
context = new Context();
context.put(Messages.class, this);
options = Options.instance(context);
attributeFactory = new Attribute.Factory();
}
public JavapTask(Writer out,
JavaFileManager fileManager,
DiagnosticListener<? super JavaFileObject> diagnosticListener) {
this();
this.log = getPrintWriterForWriter(out);
this.fileManager = fileManager;
this.diagnosticListener = diagnosticListener;
}
public JavapTask(Writer out,
JavaFileManager fileManager,
DiagnosticListener<? super JavaFileObject> diagnosticListener,
Iterable<String> options,
Iterable<String> classes) {
this(out, fileManager, diagnosticListener);
this.classes = new ArrayList<>();
for (String classname: classes) {
Objects.requireNonNull(classname);
this.classes.add(classname);
}
try {
if (options != null)
handleOptions(options, false);
} catch (BadArgs e) {
throw new IllegalArgumentException(e.getMessage());
}
}
public void setLocale(Locale locale) {
if (locale == null)
locale = Locale.getDefault();
task_locale = locale;
}
public void setLog(Writer log) {
this.log = getPrintWriterForWriter(log);
}
public void setLog(OutputStream s) {
setLog(getPrintWriterForStream(s));
}
private static PrintWriter getPrintWriterForStream(OutputStream s) {
return new PrintWriter(s == null ? System.err : s, true);
}
private static PrintWriter getPrintWriterForWriter(Writer w) {
if (w == null)
return getPrintWriterForStream(null);
else if (w instanceof PrintWriter)
return (PrintWriter) w;
else
return new PrintWriter(w, true);
}
public void setDiagnosticListener(DiagnosticListener<? super JavaFileObject> dl) {
diagnosticListener = dl;
}
public void setDiagnosticListener(OutputStream s) {
setDiagnosticListener(getDiagnosticListenerForStream(s));
}
private DiagnosticListener<JavaFileObject> getDiagnosticListenerForStream(OutputStream s) {
return getDiagnosticListenerForWriter(getPrintWriterForStream(s));
}
private DiagnosticListener<JavaFileObject> getDiagnosticListenerForWriter(Writer w) {
final PrintWriter pw = getPrintWriterForWriter(w);
return diagnostic -> {
switch (diagnostic.getKind()) {
case ERROR:
pw.print(getMessage("err.prefix"));
break;
case WARNING:
pw.print(getMessage("warn.prefix"));
break;
case NOTE:
pw.print(getMessage("note.prefix"));
break;
}
pw.print(" ");
pw.println(diagnostic.getMessage(null));
};
}
/** Result codes.
*/
static final int
EXIT_OK = 0, // Compilation completed with no errors.
EXIT_ERROR = 1, // Completed but reported errors.
EXIT_CMDERR = 2, // Bad command-line arguments
EXIT_SYSERR = 3, // System error or resource exhaustion.
EXIT_ABNORMAL = 4; // Compiler terminated abnormally
int run(String[] args) {
try {
try {
handleOptions(args);
// the following gives consistent behavior with javac
if (classes == null || classes.size() == 0) {
if (options.help || options.version || options.fullVersion)
return EXIT_OK;
else
return EXIT_CMDERR;
}
return run();
} finally {
if (defaultFileManager != null) {
try {
defaultFileManager.close();
defaultFileManager = null;
} catch (IOException e) {
throw new InternalError(e);
}
}
}
} catch (BadArgs e) {
reportError(e.key, e.args);
if (e.showUsage) {
printLines(getMessage("main.usage.summary", progname));
}
return EXIT_CMDERR;
} catch (InternalError e) {
Object[] e_args;
if (e.getCause() == null)
e_args = e.args;
else {
e_args = new Object[e.args.length + 1];
e_args[0] = e.getCause();
System.arraycopy(e.args, 0, e_args, 1, e.args.length);
}
reportError("err.internal.error", e_args);
return EXIT_ABNORMAL;
} finally {
log.flush();
}
}
public void handleOptions(String[] args) throws BadArgs {
handleOptions(Arrays.asList(args), true);
}
private void handleOptions(Iterable<String> args, boolean allowClasses) throws BadArgs {
if (log == null) {
log = getPrintWriterForStream(System.out);
if (diagnosticListener == null)
diagnosticListener = getDiagnosticListenerForStream(System.err);
} else {
if (diagnosticListener == null)
diagnosticListener = getDiagnosticListenerForWriter(log);
}
if (fileManager == null)
fileManager = getDefaultFileManager(diagnosticListener, log);
Iterator<String> iter = args.iterator();
boolean noArgs = !iter.hasNext();
while (iter.hasNext()) {
String arg = iter.next();
if (arg.startsWith("-"))
handleOption(arg, iter);
else if (allowClasses) {
if (classes == null)
classes = new ArrayList<>();
classes.add(arg);
while (iter.hasNext())
classes.add(iter.next());
} else
throw new BadArgs("err.unknown.option", arg).showUsage(true);
}
if (options.accessOptions.size() > 1) {
StringBuilder sb = new StringBuilder();
for (String opt: options.accessOptions) {
if (sb.length() > 0)
sb.append(" ");
sb.append(opt);
}
throw new BadArgs("err.incompatible.options", sb);
}
if ((classes == null || classes.size() == 0) &&
!(noArgs || options.help || options.version || options.fullVersion)) {
throw new BadArgs("err.no.classes.specified");
}
if (noArgs || options.help)
showHelp();
if (options.version || options.fullVersion)
showVersion(options.fullVersion);
}
private void handleOption(String name, Iterator<String> rest) throws BadArgs {
for (Option o: recognizedOptions) {
if (o.matches(name)) {
if (o.hasArg) {
if (rest.hasNext())
o.process(this, name, rest.next());
else
throw new BadArgs("err.missing.arg", name).showUsage(true);
} else
o.process(this, name, null);
if (o.ignoreRest()) {
while (rest.hasNext())
rest.next();
}
return;
}
}
try {
if (fileManager.handleOption(name, rest))
return;
} catch (IllegalArgumentException e) {
throw new BadArgs("err.invalid.use.of.option", name).showUsage(true);
}
throw new BadArgs("err.unknown.option", name).showUsage(true);
}
public Boolean call() {
return run() == 0;
}
public int run() {
if (classes == null || classes.isEmpty()) {
return EXIT_ERROR;
}
context.put(PrintWriter.class, log);
ClassWriter classWriter = ClassWriter.instance(context);
SourceWriter sourceWriter = SourceWriter.instance(context);
sourceWriter.setFileManager(fileManager);
if (options.moduleName != null) {
try {
moduleLocation = findModule(options.moduleName);
if (moduleLocation == null) {
reportError("err.cant.find.module", options.moduleName);
return EXIT_ERROR;
}
} catch (IOException e) {
reportError("err.cant.find.module.ex", options.moduleName, e);
return EXIT_ERROR;
}
}
int result = EXIT_OK;
for (String className: classes) {
try {
result = writeClass(classWriter, className);
} catch (ConstantPoolException e) {
reportError("err.bad.constant.pool", className, e.getLocalizedMessage());
result = EXIT_ERROR;
} catch (EOFException e) {
reportError("err.end.of.file", className);
result = EXIT_ERROR;
} catch (FileNotFoundException | NoSuchFileException e) {
reportError("err.file.not.found", e.getLocalizedMessage());
result = EXIT_ERROR;
} catch (IOException e) {
//e.printStackTrace();
Object msg = e.getLocalizedMessage();
if (msg == null) {
msg = e;
}
reportError("err.ioerror", className, msg);
result = EXIT_ERROR;
} catch (OutOfMemoryError e) {
reportError("err.nomem");
result = EXIT_ERROR;
} catch (Throwable t) {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
t.printStackTrace(pw);
pw.close();
reportError("err.crash", t.toString(), sw.toString());
result = EXIT_ABNORMAL;
}
}
return result;
}
protected int writeClass(ClassWriter classWriter, String className)
throws IOException, ConstantPoolException {
JavaFileObject fo = open(className);
if (fo == null) {
reportError("err.class.not.found", className);
return EXIT_ERROR;
}
ClassFileInfo cfInfo = read(fo);
if (!className.endsWith(".class")) {
if (cfInfo.cf.this_class == 0) {
if (!className.equals("module-info")) {
reportWarning("warn.unexpected.class", fo.getName(), className);
}
} else {
String cfName = cfInfo.cf.getName();
if (!cfName.replaceAll("[/$]", ".").equals(className.replaceAll("[/$]", "."))) {
reportWarning("warn.unexpected.class", fo.getName(), className);
}
}
}
write(cfInfo);
if (options.showInnerClasses) {
ClassFile cf = cfInfo.cf;
Attribute a = cf.getAttribute(Attribute.InnerClasses);
if (a instanceof InnerClasses_attribute) {
InnerClasses_attribute inners = (InnerClasses_attribute) a;
try {
int result = EXIT_OK;
for (int i = 0; i < inners.classes.length; i++) {
int outerIndex = inners.classes[i].outer_class_info_index;
ConstantPool.CONSTANT_Class_info outerClassInfo = cf.constant_pool.getClassInfo(outerIndex);
String outerClassName = outerClassInfo.getName();
if (outerClassName.equals(cf.getName())) {
int innerIndex = inners.classes[i].inner_class_info_index;
ConstantPool.CONSTANT_Class_info innerClassInfo = cf.constant_pool.getClassInfo(innerIndex);
String innerClassName = innerClassInfo.getName();
classWriter.println("// inner class " + innerClassName.replaceAll("[/$]", "."));
classWriter.println();
result = writeClass(classWriter, innerClassName);
if (result != EXIT_OK) return result;
}
}
return result;
} catch (ConstantPoolException e) {
reportError("err.bad.innerclasses.attribute", className);
return EXIT_ERROR;
}
} else if (a != null) {
reportError("err.bad.innerclasses.attribute", className);
return EXIT_ERROR;
}
}
return EXIT_OK;
}
protected JavaFileObject open(String className) throws IOException {
// for compatibility, first see if it is a class name
JavaFileObject fo = getClassFileObject(className);
if (fo != null)
return fo;
// see if it is an inner class, by replacing dots to $, starting from the right
String cn = className;
int lastDot;
while ((lastDot = cn.lastIndexOf(".")) != -1) {
cn = cn.substring(0, lastDot) + "$" + cn.substring(lastDot + 1);
fo = getClassFileObject(cn);
if (fo != null)
return fo;
}
if (!className.endsWith(".class"))
return null;
if (fileManager instanceof StandardJavaFileManager) {
StandardJavaFileManager sfm = (StandardJavaFileManager) fileManager;
try {
fo = sfm.getJavaFileObjects(className).iterator().next();
if (fo != null && fo.getLastModified() != 0) {
return fo;
}
} catch (IllegalArgumentException ignore) {
}
}
// see if it is a URL, and if so, wrap it in just enough of a JavaFileObject
// to suit javap's needs
if (className.matches("^[A-Za-z]+:.*")) {
try {
final URI uri = new URI(className);
final URL url = uri.toURL();
final URLConnection conn = url.openConnection();
conn.setUseCaches(false);
return new JavaFileObject() {
public Kind getKind() {
return JavaFileObject.Kind.CLASS;
}
public boolean isNameCompatible(String simpleName, Kind kind) {
throw new UnsupportedOperationException();
}
public NestingKind getNestingKind() {
throw new UnsupportedOperationException();
}
public Modifier getAccessLevel() {
throw new UnsupportedOperationException();
}
public URI toUri() {
return uri;
}
public String getName() {
return uri.toString();
}
public InputStream openInputStream() throws IOException {
return conn.getInputStream();
}
public OutputStream openOutputStream() throws IOException {
throw new UnsupportedOperationException();
}
public Reader openReader(boolean ignoreEncodingErrors) throws IOException {
throw new UnsupportedOperationException();
}
public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
throw new UnsupportedOperationException();
}
public Writer openWriter() throws IOException {
throw new UnsupportedOperationException();
}
public long getLastModified() {
return conn.getLastModified();
}
public boolean delete() {
throw new UnsupportedOperationException();
}
};
} catch (URISyntaxException | IOException ignore) {
}
}
return null;
}
public static class ClassFileInfo {
ClassFileInfo(JavaFileObject fo, ClassFile cf, byte[] digest, int size) {
this.fo = fo;
this.cf = cf;
this.digest = digest;
this.size = size;
}
public final JavaFileObject fo;
public final ClassFile cf;
public final byte[] digest;
public final int size;
}
public ClassFileInfo read(JavaFileObject fo) throws IOException, ConstantPoolException {
InputStream in = fo.openInputStream();
try {
SizeInputStream sizeIn = null;
MessageDigest md = null;
if (options.sysInfo || options.verbose) {
try {
md = MessageDigest.getInstance("SHA-256");
} catch (NoSuchAlgorithmException ignore) {
}
in = new DigestInputStream(in, md);
in = sizeIn = new SizeInputStream(in);
}
ClassFile cf = ClassFile.read(in, attributeFactory);
byte[] digest = (md == null) ? null : md.digest();
int size = (sizeIn == null) ? -1 : sizeIn.size();
return new ClassFileInfo(fo, cf, digest, size);
} finally {
in.close();
}
}
public void write(ClassFileInfo info) {
ClassWriter classWriter = ClassWriter.instance(context);
if (options.sysInfo || options.verbose) {
classWriter.setFile(info.fo.toUri());
classWriter.setLastModified(info.fo.getLastModified());
classWriter.setDigest("SHA-256", info.digest);
classWriter.setFileSize(info.size);
}
classWriter.write(info.cf);
}
protected void setClassFile(ClassFile classFile) {
ClassWriter classWriter = ClassWriter.instance(context);
classWriter.setClassFile(classFile);
}
protected void setMethod(Method enclosingMethod) {
ClassWriter classWriter = ClassWriter.instance(context);
classWriter.setMethod(enclosingMethod);
}
protected void write(Attribute value) {
AttributeWriter attrWriter = AttributeWriter.instance(context);
ClassWriter classWriter = ClassWriter.instance(context);
ClassFile cf = classWriter.getClassFile();
attrWriter.write(cf, value, cf.constant_pool);
}
protected void write(Attributes attrs) {
AttributeWriter attrWriter = AttributeWriter.instance(context);
ClassWriter classWriter = ClassWriter.instance(context);
ClassFile cf = classWriter.getClassFile();
attrWriter.write(cf, attrs, cf.constant_pool);
}
protected void write(ConstantPool constant_pool) {
ConstantWriter constantWriter = ConstantWriter.instance(context);
constantWriter.writeConstantPool(constant_pool);
}
protected void write(ConstantPool constant_pool, int value) {
ConstantWriter constantWriter = ConstantWriter.instance(context);
constantWriter.write(value);
}
protected void write(ConstantPool.CPInfo value) {
ConstantWriter constantWriter = ConstantWriter.instance(context);
constantWriter.println(value);
}
protected void write(Field value) {
ClassWriter classWriter = ClassWriter.instance(context);
classWriter.writeField(value);
}
protected void write(Method value) {
ClassWriter classWriter = ClassWriter.instance(context);
classWriter.writeMethod(value);
}
private JavaFileManager getDefaultFileManager(final DiagnosticListener<? super JavaFileObject> dl, PrintWriter log) {
if (defaultFileManager == null)
defaultFileManager = JavapFileManager.create(dl, log);
return defaultFileManager;
}
private JavaFileObject getClassFileObject(String className) throws IOException {
try {
JavaFileObject fo;
if (moduleLocation != null) {
fo = fileManager.getJavaFileForInput(moduleLocation, className, JavaFileObject.Kind.CLASS);
} else {
fo = fileManager.getJavaFileForInput(StandardLocation.PLATFORM_CLASS_PATH, className, JavaFileObject.Kind.CLASS);
if (fo == null)
fo = fileManager.getJavaFileForInput(StandardLocation.CLASS_PATH, className, JavaFileObject.Kind.CLASS);
}
return fo;
} catch (IllegalArgumentException e) {
return null;
}
}
private Location findModule(String moduleName) throws IOException {
Location[] locns = {
StandardLocation.UPGRADE_MODULE_PATH,
StandardLocation.SYSTEM_MODULES,
StandardLocation.MODULE_PATH
};
for (Location segment: locns) {
for (Set<Location> set: fileManager.listLocationsForModules(segment)) {
Location result = null;
for (Location l: set) {
String name = fileManager.inferModuleName(l);
if (name.equals(moduleName)) {
if (result == null)
result = l;
else
throw new IOException("multiple definitions found for " + moduleName);
}
}
if (result != null)
return result;
}
}
return null;
}
private void showHelp() {
printLines(getMessage("main.usage", progname));
for (Option o: recognizedOptions) {
String name = o.aliases[0].replaceAll("^-+", "").replaceAll("-+", "_"); // there must always be at least one name
if (name.startsWith("X") || name.equals("fullversion") || name.equals("h") || name.equals("verify"))
continue;
printLines(getMessage("main.opt." + name));
}
String[] fmOptions = {
"--module-path", "--system",
"--class-path", "-classpath", "-cp",
"-bootclasspath",
"--multi-release"
};
for (String o: fmOptions) {
if (fileManager.isSupportedOption(o) == -1)
continue;
String name = o.replaceAll("^-+", "").replaceAll("-+", "_");
printLines(getMessage("main.opt." + name));
}
printLines(getMessage("main.usage.foot"));
}
private void showVersion(boolean full) {
printLines(version(full ? "full" : "release"));
}
private void printLines(String msg) {
log.println(msg.replace("\n", nl));
}
private static final String nl = System.getProperty("line.separator");
private static final String versionRBName = "com.sun.tools.javap.resources.version";
private static ResourceBundle versionRB;
private String version(String key) {
// key=version: mm.nn.oo[-milestone]
// key=full: mm.mm.oo[-milestone]-build
if (versionRB == null) {
try {
versionRB = ResourceBundle.getBundle(versionRBName);
} catch (MissingResourceException e) {
return getMessage("version.resource.missing", System.getProperty("java.version"));
}
}
try {
return versionRB.getString(key);
}
catch (MissingResourceException e) {
return getMessage("version.unknown", System.getProperty("java.version"));
}
}
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