/*
* Copyright (c) 2003, 2006, 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.util.Locale;
import java.util.Map;
import javax.tools.Diagnostic;
import javax.tools.FileObject;
import javax.tools.JavaFileObject;
import com.sun.tools.javac.tree.JCTree;
import static com.sun.tools.javac.util.JCDiagnostic.DiagnosticType.*;
/** An abstraction of a diagnostic message generated by the compiler.
*
* <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 JCDiagnostic implements Diagnostic<JavaFileObject> {
/** A factory for creating diagnostic objects. */
public static class Factory {
/** The context key for the diagnostic factory. */
protected static final Context.Key<JCDiagnostic.Factory> diagnosticFactoryKey =
new Context.Key<JCDiagnostic.Factory>();
/** Get the Factory instance for this context. */
public static Factory instance(Context context) {
Factory instance = context.get(diagnosticFactoryKey);
if (instance == null)
instance = new Factory(context);
return instance;
}
final Messages messages;
final String prefix;
/** Create a new diagnostic factory. */
protected Factory(Context context) {
context.put(diagnosticFactoryKey, this);
messages = Messages.instance(context);
prefix = "compiler";
}
/** Create a new diagnostic factory. */
public Factory(Messages messages, String prefix) {
this.messages = messages;
this.prefix = prefix;
}
/**
* Create an error diagnostic.
* @param source The source of the compilation unit, if any, in which to report the error.
* @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 JCDiagnostic error(
DiagnosticSource source, DiagnosticPosition pos, String key, Object... args) {
return new JCDiagnostic(messages, ERROR, true, source, pos, qualify(ERROR, key), args);
}
/**
* Create a warning diagnostic that will not be hidden by the -nowarn or -Xlint:none options.
* @param source The source of the compilation unit, if any, in which to report the warning.
* @param pos The source position at which to report the warning.
* @param key The key for the localized error message.
* @param args Fields of the error message.
* @see MandatoryWarningHandler
*/
public JCDiagnostic mandatoryWarning(
DiagnosticSource source, DiagnosticPosition pos, String key, Object... args) {
return new JCDiagnostic(messages, WARNING, true, source, pos, qualify(WARNING, key), args);
}
/**
* Create a warning diagnostic.
* @param source The source of the compilation unit, if any, in which to report the warning.
* @param pos The source position at which to report the warning.
* @param key The key for the localized error message.
* @param args Fields of the error message.
*/
public JCDiagnostic warning(
DiagnosticSource source, DiagnosticPosition pos, String key, Object... args) {
return new JCDiagnostic(messages, WARNING, false, source, pos, qualify(WARNING, key), args);
}
/**
* Create a note diagnostic that will not be hidden by the -nowarn or -Xlint:none options.
* @param key The key for the localized error message.
* @param args Fields of the error message.
* @see MandatoryWarningHandler
*/
public JCDiagnostic mandatoryNote(DiagnosticSource source, String key, Object... args) {
return new JCDiagnostic(messages, NOTE, true, source, null, qualify(NOTE, key), args);
}
/**
* Create a note diagnostic.
* @param key The key for the localized error message.
* @param args Fields of the error message.
*/
public JCDiagnostic note(String key, Object... args) {
return note(null, null, key, args);
}
/**
* Create a note diagnostic.
* @param source The source of the compilation unit, if any, in which to report the note.
* @param pos The source position at which to report the note.
* @param key The key for the localized error message.
* @param args Fields of the error message.
*/
public JCDiagnostic note(
DiagnosticSource source, DiagnosticPosition pos, String key, Object... args) {
return new JCDiagnostic(messages, NOTE, false, source, pos, qualify(NOTE, key), args);
}
/**
* Create a fragment diagnostic, for use as an argument in other diagnostics
* @param key The key for the localized error message.
* @param args Fields of the error message.
*/
public JCDiagnostic fragment(String key, Object... args) {
return new JCDiagnostic(messages, FRAGMENT, false, null, null, qualify(FRAGMENT, key), args);
}
protected String qualify(DiagnosticType t, String key) {
return prefix + "." + t.key + "." + key;
}
}
/**
* Create a fragment diagnostic, for use as an argument in other diagnostics
* @param key The key for the localized error message.
* @param args Fields of the error message.
*/
// should be deprecated
public static JCDiagnostic fragment(String key, Object... args) {
return new JCDiagnostic(Messages.getDefaultMessages(),
FRAGMENT,
false,
null,
null,
"compiler." + FRAGMENT.key + "." + key,
args);
}
/**
* A simple abstraction of a source file, as needed for use in a diagnostic message.
*/
// Note: This class may be superceded by a more general abstraction
public interface DiagnosticSource {
JavaFileObject getFile();
CharSequence getName();
int getLineNumber(int pos);
int getColumnNumber(int pos);
Map<JCTree, Integer> getEndPosTable();
};
/**
* A DiagnosticType defines the type of the diagnostic.
**/
public enum DiagnosticType {
/** A fragment of an enclosing diagnostic. */
FRAGMENT("misc"),
/** A note: similar to, but less serious than, a warning. */
NOTE("note"),
/** A warning. */
WARNING("warn"),
/** An error. */
ERROR("err");
final String key;
/** Create a DiagnosticType.
* @param key A string used to create the resource key for the diagnostic.
*/
DiagnosticType(String key) {
this.key = key;
}
};
/**
* A DiagnosticPosition provides information about the positions in a file
* that gave rise to a diagnostic. It always defines a "preferred" position
* that most accurately defines the location of the diagnostic, it may also
* provide a related tree node that spans that location.
*/
public static interface DiagnosticPosition {
/** Gets the tree node, if any, to which the diagnostic applies. */
JCTree getTree();
/** If there is a tree node, get the start position of the tree node.
* Otherwise, just returns the same as getPreferredPosition(). */
int getStartPosition();
/** Get the position within the file that most accurately defines the
* location for the diagnostic. */
int getPreferredPosition();
/** If there is a tree node, and if endPositions are available, get
* the end position of the tree node. Otherwise, just returns the
* same as getPreferredPosition(). */
int getEndPosition(Map<JCTree, Integer> endPosTable);
}
/**
* A DiagnosticPosition that simply identifies a position, but no related
* tree node, as the location for a diagnostic. Used for scanner and parser
* diagnostics. */
public static class SimpleDiagnosticPosition implements DiagnosticPosition {
public SimpleDiagnosticPosition(int pos) {
this.pos = pos;
}
public JCTree getTree() {
return null;
}
public int getStartPosition() {
return pos;
}
public int getPreferredPosition() {
return pos;
}
public int getEndPosition(Map<JCTree, Integer> endPosTable) {
return pos;
}
private final int pos;
}
private final Messages messages;
private final DiagnosticType type;
private final DiagnosticSource source;
private final DiagnosticPosition position;
private final int line;
private final int column;
private final String key;
private final Object[] args;
private boolean mandatory;
/**
* Create a diagnostic object.
* @param messages the resource for localized messages
* @param dt the type of diagnostic
* @param name the name of the source file, or null if none.
* @param pos the character offset within the source file, if given.
* @param key a resource key to identify the text of the diagnostic
* @param args arguments to be included in the text of the diagnostic
*/
protected JCDiagnostic(Messages messages,
DiagnosticType dt,
boolean mandatory,
DiagnosticSource source,
DiagnosticPosition pos,
String key,
Object ... args) {
if (source == null && pos != null && pos.getPreferredPosition() != Position.NOPOS)
throw new IllegalArgumentException();
this.messages = messages;
this.type = dt;
this.mandatory = mandatory;
this.source = source;
this.position = pos;
this.key = key;
this.args = args;
int n = (pos == null ? Position.NOPOS : pos.getPreferredPosition());
if (n == Position.NOPOS || source == null)
line = column = -1;
else {
line = source.getLineNumber(n);
column = source.getColumnNumber(n);
}
}
/**
* Get the type of this diagnostic.
* @return the type of this diagnostic
*/
public DiagnosticType getType() {
return type;
}
/**
* Check whether or not this diagnostic is required to be shown.
* @return true if this diagnostic is required to be shown.
*/
public boolean isMandatory() {
return mandatory;
}
/**
* Get the name of the source file referred to by this diagnostic.
* @return the name of the source referred to with this diagnostic, or null if none
*/
public JavaFileObject getSource() {
if (source == null)
return null;
else
return source.getFile();
}
/**
* Get the name of the source file referred to by this diagnostic.
* @return the name of the source referred to with this diagnostic, or null if none
*/
public String getSourceName() {
JavaFileObject s = getSource();
return s == null ? null : s.getName();
}
/**
* Get the source referred to by this diagnostic.
* @return the source referred to with this diagnostic, or null if none
*/
public DiagnosticSource getDiagnosticSource() {
return source;
}
protected int getIntStartPosition() {
return (position == null ? Position.NOPOS : position.getStartPosition());
}
protected int getIntPosition() {
return (position == null ? Position.NOPOS : position.getPreferredPosition());
}
protected int getIntEndPosition() {
return (position == null ? Position.NOPOS : position.getEndPosition(source.getEndPosTable()));
}
public long getStartPosition() {
return getIntStartPosition();
}
public long getPosition() {
return getIntPosition();
}
public long getEndPosition() {
return getIntEndPosition();
}
/**
* Get the line number within the source referred to by this diagnostic.
* @return the line number within the source referred to by this diagnostic
*/
public long getLineNumber() {
return line;
}
/**
* Get the column number within the line of source referred to by this diagnostic.
* @return the column number within the line of source referred to by this diagnostic
*/
public long getColumnNumber() {
return column;
}
/**
* Get the arguments to be included in the text of the diagnostic.
* @return the arguments to be included in the text of the diagnostic
*/
public Object[] getArgs() {
return args;
}
/**
* Get the prefix string associated with this type of diagnostic.
* @return the prefix string associated with this type of diagnostic
*/
public String getPrefix() {
return getPrefix(type);
}
/**
* Get the prefix string associated with a particular type of diagnostic.
* @return the prefix string associated with a particular type of diagnostic
*/
public String getPrefix(DiagnosticType dt) {
switch (dt) {
case FRAGMENT: return "";
case NOTE: return getLocalizedString("compiler.note.note");
case WARNING: return getLocalizedString("compiler.warn.warning");
case ERROR: return getLocalizedString("compiler.err.error");
default:
throw new AssertionError("Unknown diagnostic type: " + dt);
}
}
/**
* Return the standard presentation of this diagnostic.
*/
public String toString() {
if (defaultFormatter == null) {
defaultFormatter =
new DiagnosticFormatter();
}
return defaultFormatter.format(this);
}
private static DiagnosticFormatter defaultFormatter;
private static final String messageBundleName =
"com.sun.tools.javac.resources.compiler";
private String getLocalizedString(String key, Object... args) {
String[] strings = new String[args.length];
for (int i = 0; i < strings.length; i++) {
Object arg = args[i];
if (arg == null)
strings[i] = null;
else if (arg instanceof FileObject)
strings[i] = ((FileObject) arg).getName();
else if (arg instanceof JCDiagnostic)
strings[i] = ((JCDiagnostic) arg).getMessage(null);
else
strings[i] = arg.toString();
}
return messages.getLocalizedString(key, (Object[]) strings);
}
// Methods for javax.tools.Diagnostic
public Diagnostic.Kind getKind() {
switch (type) {
case NOTE:
return Diagnostic.Kind.NOTE;
case WARNING:
return mandatory ? Diagnostic.Kind.MANDATORY_WARNING
: Diagnostic.Kind.WARNING;
case ERROR:
return Diagnostic.Kind.ERROR;
default:
return Diagnostic.Kind.OTHER;
}
}
public String getCode() {
return key;
}
public String getMessage(Locale locale) {
// RFE 6406133: JCDiagnostic.getMessage ignores locale argument
return getLocalizedString(key, args);
}
}