/*
* Copyright (c) 1999, 2010, 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.javac.util;
import java.io.*;
import java.nio.CharBuffer;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import javax.tools.DiagnosticListener;
import javax.tools.JavaFileObject;
import com.sun.tools.javac.file.BaseFileObject;
import com.sun.tools.javac.file.JavacFileManager;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
import com.sun.tools.javac.util.JCDiagnostic.DiagnosticType;
import com.sun.tools.javac.util.JCDiagnostic.SimpleDiagnosticPosition;
import static com.sun.tools.javac.util.LayoutCharacters.*;
/** A class for error logs. Reports errors and warnings, and
* keeps track of error numbers and positions.
*
* <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 Log {
/** The context key for the log. */
public static final Context.Key<Log> logKey
= new Context.Key<Log>();
/** The context key for the output PrintWriter. */
public static final Context.Key<PrintWriter> outKey =
new Context.Key<PrintWriter>();
//@Deprecated
public final PrintWriter errWriter;
//@Deprecated
public final PrintWriter warnWriter;
//@Deprecated
public final PrintWriter noticeWriter;
/** The maximum number of errors/warnings that are reported.
*/
public final int MaxErrors;
public final int MaxWarnings;
/** Whether or not to display the line of source containing a diagnostic.
*/
private final boolean showSourceLine;
/** Switch: prompt user on each error.
*/
public boolean promptOnError;
/** Switch: emit warning messages.
*/
public boolean emitWarnings;
/** Print stack trace on errors?
*/
public boolean dumpOnError;
/** Print multiple errors for same source locations.
*/
public boolean multipleErrors;
/**
* Diagnostic listener, if provided through programmatic
* interface to javac (JSR 199).
*/
protected DiagnosticListener<? super JavaFileObject> diagListener;
/**
* Formatter for diagnostics
*/
private DiagnosticFormatter diagFormatter;
/**
* Factory for diagnostics
*/
private JCDiagnostic.Factory diags;
/** Construct a log with given I/O redirections.
*/
@Deprecated
protected Log(Context context, PrintWriter errWriter, PrintWriter warnWriter, PrintWriter noticeWriter) {
context.put(logKey, this);
this.errWriter = errWriter;
this.warnWriter = warnWriter;
this.noticeWriter = noticeWriter;
this.diags = JCDiagnostic.Factory.instance(context);
Options options = Options.instance(context);
this.dumpOnError = options.get("-doe") != null;
this.promptOnError = options.get("-prompt") != null;
this.emitWarnings = options.get("-Xlint:none") == null;
this.MaxErrors = getIntOption(options, "-Xmaxerrs", 100);
this.MaxWarnings = getIntOption(options, "-Xmaxwarns", 100);
this.showSourceLine = options.get("rawDiagnostics") == null;
this.diagFormatter = DiagnosticFormatter.instance(context);
@SuppressWarnings("unchecked") // FIXME
DiagnosticListener<? super JavaFileObject> diagListener =
context.get(DiagnosticListener.class);
this.diagListener = diagListener;
}
// where
private int getIntOption(Options options, String optionName, int defaultValue) {
String s = options.get(optionName);
try {
if (s != null) return Integer.parseInt(s);
} catch (NumberFormatException e) {
// silently ignore ill-formed numbers
}
return defaultValue;
}
/** The default writer for diagnostics
*/
static final PrintWriter defaultWriter(Context context) {
PrintWriter result = context.get(outKey);
if (result == null)
context.put(outKey, result = new PrintWriter(System.err));
return result;
}
/** Construct a log with default settings.
*/
protected Log(Context context) {
this(context, defaultWriter(context));
}
/** Construct a log with all output redirected.
*/
protected Log(Context context, PrintWriter defaultWriter) {
this(context, defaultWriter, defaultWriter, defaultWriter);
}
/** Get the Log instance for this context. */
public static Log instance(Context context) {
Log instance = context.get(logKey);
if (instance == null)
instance = new Log(context);
return instance;
}
/** The file that's currently translated.
*/
protected JCDiagnostic.DiagnosticSource source;
/** The number of errors encountered so far.
*/
public int nerrors = 0;
/** The number of warnings encountered so far.
*/
public int nwarnings = 0;
/**
* Whether or not an unrecoverable error has been seen.
* Unrecoverable errors prevent subsequent annotation processing.
*/
public boolean unrecoverableError;
/** A set of all errors generated so far. This is used to avoid printing an
* error message more than once. For each error, a pair consisting of the
* source file name and source code position of the error is added to the set.
*/
private Set<Pair<JavaFileObject, Integer>> recorded = new HashSet<Pair<JavaFileObject,Integer>>();
private Map<JavaFileObject, Map<JCTree, Integer>> endPosTables;
/** The buffer containing the file that's currently translated.
*/
private char[] buf = null;
/** The position in the buffer at which last error was reported
*/
private int bp;
/** number of the current source line; first line is 1
*/
private int line;
/** buffer index of the first character of the current source line
*/
private int lineStart;
public boolean hasDiagnosticListener() {
return diagListener != null;
}
public void setEndPosTable(JavaFileObject name, Map<JCTree, Integer> table) {
if (endPosTables == null)
endPosTables = new HashMap<JavaFileObject, Map<JCTree, Integer>>();
endPosTables.put(name, table);
}
/** Re-assign source, returning previous setting.
*/
public JavaFileObject useSource(final JavaFileObject name) {
JavaFileObject prev = currentSource();
if (name != prev) {
source = new JCDiagnostic.DiagnosticSource() {
public JavaFileObject getFile() {
return name;
}
public CharSequence getName() {
if (name instanceof BaseFileObject)
return ((BaseFileObject) name).getShortName();
else
return BaseFileObject.getSimpleName(name);
}
public int getLineNumber(int pos) {
return Log.this.getLineNumber(pos);
}
public int getColumnNumber(int pos) {
return Log.this.getColumnNumber(pos);
}
public Map<JCTree, Integer> getEndPosTable() {
return (endPosTables == null ? null : endPosTables.get(name));
}
};
buf = null;
}
return prev;
}
/** Re-assign source buffer for existing source name.
*/
protected void setBuf(char[] newBuf) {
buf = newBuf;
bp = 0;
lineStart = 0;
line = 1;
}
protected char[] getBuf() {
return buf;
}
/** Return current source name.
*/
public JavaFileObject currentSource() {
return source == null ? null : source.getFile();
}
/** Flush the logs
*/
public void flush() {
errWriter.flush();
warnWriter.flush();
noticeWriter.flush();
}
/** Returns true if an error needs to be reported for a given
* source name and pos.
*/
protected boolean shouldReport(JavaFileObject file, int pos) {
if (multipleErrors || file == null)
return true;
Pair<JavaFileObject,Integer> coords = new Pair<JavaFileObject,Integer>(file, pos);
boolean shouldReport = !recorded.contains(coords);
if (shouldReport)
recorded.add(coords);
return shouldReport;
}
/** Prompt user after an error.
*/
public void prompt() {
if (promptOnError) {
System.err.println(getLocalizedString("resume.abort"));
char ch;
try {
while (true) {
switch (System.in.read()) {
case 'a': case 'A':
System.exit(-1);
return;
case 'r': case 'R':
return;
case 'x': case 'X':
throw new AssertionError("user abort");
default:
}
}
} catch (IOException e) {}
}
}
/** Print the faulty source code line and point to the error.
* @param pos Buffer index of the error position, must be on current line
*/
private void printErrLine(int pos, PrintWriter writer) {
if (!findLine(pos))
return;
int lineEnd = lineStart;
while (lineEnd < buf.length && buf[lineEnd] != CR && buf[lineEnd] != LF)
lineEnd++;
if (lineEnd - lineStart == 0)
return;
printLines(writer, new String(buf, lineStart, lineEnd - lineStart));
for (bp = lineStart; bp < pos; bp++) {
writer.print((buf[bp] == '\t') ? "\t" : " ");
}
writer.println("^");
writer.flush();
}
protected static char[] getCharContent(JavaFileObject fileObject) throws IOException {
CharSequence cs = fileObject.getCharContent(true);
if (cs instanceof CharBuffer) {
return JavacFileManager.toArray((CharBuffer)cs);
} else {
return cs.toString().toCharArray();
}
}
/** Find the line in the buffer that contains the current position
* @param pos Character offset into the buffer
*/
private boolean findLine(int pos) {
if (pos == Position.NOPOS || currentSource() == null)
return false;
try {
if (buf == null) {
buf = getCharContent(currentSource());
lineStart = 0;
line = 1;
} else if (lineStart > pos) { // messages don't come in order
lineStart = 0;
line = 1;
}
bp = lineStart;
while (bp < buf.length && bp < pos) {
switch (buf[bp++]) {
case CR:
if (bp < buf.length && buf[bp] == LF) bp++;
line++;
lineStart = bp;
break;
case LF:
line++;
lineStart = bp;
break;
}
}
return bp <= buf.length;
} catch (IOException e) {
//e.printStackTrace();
// FIXME: include e.getLocalizedMessage() in error message
printLines(errWriter, getLocalizedString("source.unavailable"));
errWriter.flush();
buf = new char[0];
}
return false;
}
/** Print the text of a message, translating newlines appropriately
* for the platform.
*/
public static void printLines(PrintWriter writer, String msg) {
int nl;
while ((nl = msg.indexOf('\n')) != -1) {
writer.println(msg.substring(0, nl));
msg = msg.substring(nl+1);
}
if (msg.length() != 0) writer.println(msg);
}
/** Report an error, unless another error was already reported at same
* source position.
* @param key The key for the localized error message.
* @param args Fields of the error message.
*/
public void error(String key, Object ... args) {
report(diags.error(source, null, key, args));
}
/** Report an error, unless another error was already reported at same
* source position.
* @param pos The source position at which to report the error.
* @param key The key for the localized error message.
* @param args Fields of the error message.
*/
public void error(DiagnosticPosition pos, String key, Object ... args) {
report(diags.error(source, pos, key, args));
}
/** Report an error, unless another error was already reported at same
* source position.
* @param pos The source position at which to report the error.
* @param key The key for the localized error message.
* @param args Fields of the error message.
*/
public void error(int pos, String key, Object ... args) {
report(diags.error(source, wrap(pos), key, args));
}
/** Report a warning, unless suppressed by the -nowarn option or the
* maximum number of warnings has been reached.
* @param pos The source position at which to report the warning.
* @param key The key for the localized warning message.
* @param args Fields of the warning message.
*/
public void warning(String key, Object ... args) {
report(diags.warning(source, null, key, args));
}
/** Report a warning, unless suppressed by the -nowarn option or the
* maximum number of warnings has been reached.
* @param pos The source position at which to report the warning.
* @param key The key for the localized warning message.
* @param args Fields of the warning message.
*/
public void warning(DiagnosticPosition pos, String key, Object ... args) {
report(diags.warning(source, pos, key, args));
}
/** Report a warning, unless suppressed by the -nowarn option or the
* maximum number of warnings has been reached.
* @param pos The source position at which to report the warning.
* @param key The key for the localized warning message.
* @param args Fields of the warning message.
*/
public void warning(int pos, String key, Object ... args) {
report(diags.warning(source, wrap(pos), key, args));
}
/** Report a warning.
* @param pos The source position at which to report the warning.
* @param key The key for the localized warning message.
* @param args Fields of the warning message.
*/
public void mandatoryWarning(DiagnosticPosition pos, String key, Object ... args) {
report(diags.mandatoryWarning(source, pos, key, args));
}
/** Report a warning that cannot be suppressed.
* @param pos The source position at which to report the warning.
* @param key The key for the localized warning message.
* @param args Fields of the warning message.
*/
public void strictWarning(DiagnosticPosition pos, String key, Object ... args) {
writeDiagnostic(diags.warning(source, pos, key, args));
nwarnings++;
}
/** Provide a non-fatal notification, unless suppressed by the -nowarn option.
* @param key The key for the localized notification message.
* @param args Fields of the notification message.
*/
public void note(String key, Object ... args) {
report(diags.note(source, null, key, args));
}
/** Provide a non-fatal notification, unless suppressed by the -nowarn option.
* @param key The key for the localized notification message.
* @param args Fields of the notification message.
*/
public void note(DiagnosticPosition pos, String key, Object ... args) {
report(diags.note(source, pos, key, args));
}
/** Provide a non-fatal notification, unless suppressed by the -nowarn option.
* @param key The key for the localized notification message.
* @param args Fields of the notification message.
*/
public void note(int pos, String key, Object ... args) {
report(diags.note(source, wrap(pos), key, args));
}
/** Provide a non-fatal notification, unless suppressed by the -nowarn option.
* @param file The file to which the note applies.
* @param key The key for the localized notification message.
* @param args Fields of the notification message.
*/
public void note(JavaFileObject file, String key, Object ... args) {
report(diags.note(wrap(file), null, key, args));
}
/** Provide a non-fatal notification, unless suppressed by the -nowarn option.
* @param key The key for the localized notification message.
* @param args Fields of the notification message.
*/
public void mandatoryNote(final JavaFileObject file, String key, Object ... args) {
report(diags.mandatoryNote(wrap(file), key, args));
}
private JCDiagnostic.DiagnosticSource wrap(final JavaFileObject file) {
if (file == null)
return null;
return new JCDiagnostic.DiagnosticSource() {
public JavaFileObject getFile() {
return file;
}
public CharSequence getName() {
if (file instanceof BaseFileObject)
return ((BaseFileObject) file).getShortName();
else
return BaseFileObject.getSimpleName(file);
}
public int getLineNumber(int pos) {
return Log.this.getLineNumber(pos);
}
public int getColumnNumber(int pos) {
return Log.this.getColumnNumber(pos);
}
public Map<JCTree, Integer> getEndPosTable() {
return (endPosTables == null ? null : endPosTables.get(file));
}
};
}
private DiagnosticPosition wrap(int pos) {
return (pos == Position.NOPOS ? null : new SimpleDiagnosticPosition(pos));
}
/**
* Common diagnostic handling.
* The diagnostic is counted, and depending on the options and how many diagnostics have been
* reported so far, the diagnostic may be handed off to writeDiagnostic.
*/
public void report(JCDiagnostic diagnostic) {
switch (diagnostic.getType()) {
case FRAGMENT:
throw new IllegalArgumentException();
case NOTE:
// Print out notes only when we are permitted to report warnings
// Notes are only generated at the end of a compilation, so should be small
// in number.
if (emitWarnings || diagnostic.isMandatory()) {
writeDiagnostic(diagnostic);
}
break;
case WARNING:
if (emitWarnings || diagnostic.isMandatory()) {
if (nwarnings < MaxWarnings) {
writeDiagnostic(diagnostic);
nwarnings++;
}
}
break;
case ERROR:
if (nerrors < MaxErrors
&& shouldReport(diagnostic.getSource(), diagnostic.getIntPosition())) {
writeDiagnostic(diagnostic);
nerrors++;
}
break;
}
}
/**
* Write out a diagnostic.
*/
protected void writeDiagnostic(JCDiagnostic diag) {
if (diagListener != null) {
try {
diagListener.report(diag);
return;
}
catch (Throwable t) {
throw new ClientCodeException(t);
}
}
PrintWriter writer = getWriterForDiagnosticType(diag.getType());
printLines(writer, diagFormatter.format(diag));
if (showSourceLine) {
int pos = diag.getIntPosition();
if (pos != Position.NOPOS) {
JavaFileObject prev = useSource(diag.getSource());
printErrLine(pos, writer);
useSource(prev);
}
}
if (promptOnError) {
switch (diag.getType()) {
case ERROR:
case WARNING:
prompt();
}
}
if (dumpOnError)
new RuntimeException().printStackTrace(writer);
writer.flush();
}
@Deprecated
protected PrintWriter getWriterForDiagnosticType(DiagnosticType dt) {
switch (dt) {
case FRAGMENT:
throw new IllegalArgumentException();
case NOTE:
return noticeWriter;
case WARNING:
return warnWriter;
case ERROR:
return errWriter;
default:
throw new Error();
}
}
/** Find a localized string in the resource bundle.
* @param key The key for the localized string.
* @param args Fields to substitute into the string.
*/
public static String getLocalizedString(String key, Object ... args) {
return Messages.getDefaultLocalizedString("compiler.misc." + key, args);
}
/***************************************************************************
* raw error messages without internationalization; used for experimentation
* and quick prototyping
***************************************************************************/
/** print an error or warning message:
*/
private void printRawError(int pos, String msg) {
if (!findLine(pos)) {
printLines(errWriter, "error: " + msg);
} else {
JavaFileObject file = currentSource();
if (file != null)
printLines(errWriter,
file.getName() + ":" +
line + ": " + msg);
printErrLine(pos, errWriter);
}
errWriter.flush();
}
/** report an error:
*/
public void rawError(int pos, String msg) {
if (nerrors < MaxErrors && shouldReport(currentSource(), pos)) {
printRawError(pos, msg);
prompt();
nerrors++;
}
errWriter.flush();
}
/** report a warning:
*/
public void rawWarning(int pos, String msg) {
if (nwarnings < MaxWarnings && emitWarnings) {
printRawError(pos, "warning: " + msg);
}
prompt();
nwarnings++;
errWriter.flush();
}
/** Return the one-based line number associated with a given pos
* for the current source file. Zero is returned if no line exists
* for the given position.
*/
protected int getLineNumber(int pos) {
if (findLine(pos))
return line;
return 0;
}
/** Return the one-based column number associated with a given pos
* for the current source file. Zero is returned if no column exists
* for the given position.
*/
protected int getColumnNumber(int pos) {
if (findLine(pos)) {
int column = 0;
for (bp = lineStart; bp < pos; bp++) {
if (bp >= buf.length)
return 0;
if (buf[bp] == '\t')
column = (column / TabInc * TabInc) + TabInc;
else
column++;
}
return column + 1; // positions are one-based
}
return 0;
}
public static String format(String fmt, Object... args) {
return String.format((java.util.Locale)null, fmt, args);
}
}