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6729471: javap should accept class files on the command line

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Reviewed-by: mcimadamore
This commit is contained in:
Jonathan Gibbons 2009-08-05 08:38:18 -07:00
parent ea9763ee24
commit 9e26dc467b
2 changed files with 216 additions and 24 deletions
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131
langtools/src/share/classes/com/sun/tools/javap/JavapTask.java
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@ -32,8 +32,10 @@ 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.security.DigestInputStream;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
@ -49,6 +51,8 @@ import java.util.Map;
import java.util.MissingResourceException;
import java.util.ResourceBundle;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.NestingKind;
import javax.tools.Diagnostic;
import javax.tools.DiagnosticListener;
import javax.tools.JavaFileManager;
@ -57,6 +61,9 @@ import javax.tools.StandardJavaFileManager;
import javax.tools.StandardLocation;
import com.sun.tools.classfile.*;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLConnection;
/**
* "Main" class for javap, normally accessed from the command line
@ -607,30 +614,10 @@ public class JavapTask implements DisassemblerTool.DisassemblerTask, Messages {
protected boolean writeClass(ClassWriter classWriter, String className)
throws IOException, ConstantPoolException {
JavaFileObject fo;
if (className.endsWith(".class")) {
if (fileManager instanceof StandardJavaFileManager) {
StandardJavaFileManager sfm = (StandardJavaFileManager) fileManager;
fo = sfm.getJavaFileObjects(className).iterator().next();
} else {
reportError("err.not.standard.file.manager", className);
return false;
}
} else {
fo = getClassFileObject(className);
if (fo == null) {
// see if it is an inner class, by replacing dots to $, starting from the right
String cn = className;
int lastDot;
while (fo == null && (lastDot = cn.lastIndexOf(".")) != -1) {
cn = cn.substring(0, lastDot) + "$" + cn.substring(lastDot + 1);
fo = getClassFileObject(cn);
}
}
if (fo == null) {
reportError("err.class.not.found", className);
return false;
}
JavaFileObject fo = open(className);
if (fo == null) {
reportError("err.class.not.found", className);
return false;
}
ClassFileInfo cfInfo = read(fo);
@ -675,6 +662,102 @@ public class JavapTask implements DisassemblerTool.DisassemblerTask, Messages {
return true;
}
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;
fo = sfm.getJavaFileObjects(className).iterator().next();
if (fo != null && fo.getLastModified() != 0) {
return fo;
}
}
// 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();
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 url.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 ignore) {
} catch (IOException ignore) {
}
}
return null;
}
public static class ClassFileInfo {
ClassFileInfo(JavaFileObject fo, ClassFile cf, byte[] digest, int size) {
this.fo = fo;