739 lines
23 KiB
Java
739 lines
23 KiB
Java
/*
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* Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package com.sun.tools.javac.util;
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import java.io.*;
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import java.util.Arrays;
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import java.util.EnumSet;
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import java.util.HashSet;
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import java.util.Queue;
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import java.util.Set;
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import javax.tools.DiagnosticListener;
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import javax.tools.JavaFileObject;
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import com.sun.tools.javac.api.DiagnosticFormatter;
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import com.sun.tools.javac.main.Main;
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import com.sun.tools.javac.main.Option;
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import com.sun.tools.javac.tree.EndPosTable;
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import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
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import com.sun.tools.javac.util.JCDiagnostic.DiagnosticType;
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import static com.sun.tools.javac.main.Option.*;
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/** A class for error logs. Reports errors and warnings, and
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* keeps track of error numbers and positions.
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*
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* <p><b>This is NOT part of any supported API.
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* If you write code that depends on this, you do so at your own risk.
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* This code and its internal interfaces are subject to change or
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* deletion without notice.</b>
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*/
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public class Log extends AbstractLog {
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/** The context key for the log. */
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public static final Context.Key<Log> logKey
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= new Context.Key<Log>();
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/** The context key for the output PrintWriter. */
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public static final Context.Key<PrintWriter> outKey =
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new Context.Key<PrintWriter>();
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/* TODO: Should unify this with prefix handling in JCDiagnostic.Factory. */
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public enum PrefixKind {
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JAVAC("javac."),
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COMPILER_MISC("compiler.misc.");
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PrefixKind(String v) {
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value = v;
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}
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public String key(String k) {
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return value + k;
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}
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final String value;
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}
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/**
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* DiagnosticHandler's provide the initial handling for diagnostics.
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* When a diagnostic handler is created and has been initialized, it
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* should install itself as the current diagnostic handler. When a
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* client has finished using a handler, the client should call
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* {@code log.removeDiagnosticHandler();}
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*
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* Note that javax.tools.DiagnosticListener (if set) is called later in the
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* diagnostic pipeline.
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*/
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public static abstract class DiagnosticHandler {
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/**
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* The previously installed diagnostic handler.
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*/
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protected DiagnosticHandler prev;
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/**
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* Install this diagnostic handler as the current one,
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* recording the previous one.
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*/
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protected void install(Log log) {
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prev = log.diagnosticHandler;
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log.diagnosticHandler = this;
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}
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/**
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* Handle a diagnostic.
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*/
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public abstract void report(JCDiagnostic diag);
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}
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/**
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* A DiagnosticHandler that discards all diagnostics.
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*/
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public static class DiscardDiagnosticHandler extends DiagnosticHandler {
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public DiscardDiagnosticHandler(Log log) {
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install(log);
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}
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public void report(JCDiagnostic diag) { }
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}
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/**
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* A DiagnosticHandler that can defer some or all diagnostics,
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* by buffering them for later examination and/or reporting.
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* If a diagnostic is not deferred, or is subsequently reported
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* with reportAllDiagnostics(), it will be reported to the previously
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* active diagnostic handler.
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*/
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public static class DeferredDiagnosticHandler extends DiagnosticHandler {
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private Queue<JCDiagnostic> deferred = new ListBuffer<>();
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private final Filter<JCDiagnostic> filter;
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public DeferredDiagnosticHandler(Log log) {
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this(log, null);
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}
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public DeferredDiagnosticHandler(Log log, Filter<JCDiagnostic> filter) {
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this.filter = filter;
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install(log);
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}
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public void report(JCDiagnostic diag) {
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if (!diag.isFlagSet(JCDiagnostic.DiagnosticFlag.NON_DEFERRABLE) &&
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(filter == null || filter.accepts(diag))) {
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deferred.add(diag);
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} else {
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prev.report(diag);
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}
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}
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public Queue<JCDiagnostic> getDiagnostics() {
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return deferred;
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}
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/** Report all deferred diagnostics. */
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public void reportDeferredDiagnostics() {
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reportDeferredDiagnostics(EnumSet.allOf(JCDiagnostic.Kind.class));
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}
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/** Report selected deferred diagnostics. */
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public void reportDeferredDiagnostics(Set<JCDiagnostic.Kind> kinds) {
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JCDiagnostic d;
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while ((d = deferred.poll()) != null) {
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if (kinds.contains(d.getKind()))
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prev.report(d);
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}
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deferred = null; // prevent accidental ongoing use
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}
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}
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public enum WriterKind { NOTICE, WARNING, ERROR };
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protected PrintWriter errWriter;
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protected PrintWriter warnWriter;
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protected PrintWriter noticeWriter;
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/** The maximum number of errors/warnings that are reported.
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*/
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protected int MaxErrors;
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protected int MaxWarnings;
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/** Switch: prompt user on each error.
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*/
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public boolean promptOnError;
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/** Switch: emit warning messages.
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*/
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public boolean emitWarnings;
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/** Switch: suppress note messages.
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*/
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public boolean suppressNotes;
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/** Print stack trace on errors?
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*/
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public boolean dumpOnError;
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/** Print multiple errors for same source locations.
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*/
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public boolean multipleErrors;
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/**
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* Diagnostic listener, if provided through programmatic
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* interface to javac (JSR 199).
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*/
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protected DiagnosticListener<? super JavaFileObject> diagListener;
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/**
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* Formatter for diagnostics.
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*/
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private DiagnosticFormatter<JCDiagnostic> diagFormatter;
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/**
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* Keys for expected diagnostics.
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*/
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public Set<String> expectDiagKeys;
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/**
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* Set to true if a compressed diagnostic is reported
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*/
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public boolean compressedOutput;
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/**
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* JavacMessages object used for localization.
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*/
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private JavacMessages messages;
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/**
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* Handler for initial dispatch of diagnostics.
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*/
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private DiagnosticHandler diagnosticHandler;
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/** Construct a log with given I/O redirections.
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*/
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protected Log(Context context, PrintWriter errWriter, PrintWriter warnWriter, PrintWriter noticeWriter) {
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super(JCDiagnostic.Factory.instance(context));
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context.put(logKey, this);
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this.errWriter = errWriter;
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this.warnWriter = warnWriter;
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this.noticeWriter = noticeWriter;
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@SuppressWarnings("unchecked") // FIXME
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DiagnosticListener<? super JavaFileObject> dl =
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context.get(DiagnosticListener.class);
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this.diagListener = dl;
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diagnosticHandler = new DefaultDiagnosticHandler();
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messages = JavacMessages.instance(context);
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messages.add(Main.javacBundleName);
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final Options options = Options.instance(context);
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initOptions(options);
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options.addListener(new Runnable() {
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public void run() {
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initOptions(options);
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}
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});
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}
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// where
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private void initOptions(Options options) {
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this.dumpOnError = options.isSet(DOE);
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this.promptOnError = options.isSet(PROMPT);
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this.emitWarnings = options.isUnset(XLINT_CUSTOM, "none");
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this.suppressNotes = options.isSet("suppressNotes");
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this.MaxErrors = getIntOption(options, XMAXERRS, getDefaultMaxErrors());
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this.MaxWarnings = getIntOption(options, XMAXWARNS, getDefaultMaxWarnings());
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boolean rawDiagnostics = options.isSet("rawDiagnostics");
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this.diagFormatter = rawDiagnostics ? new RawDiagnosticFormatter(options) :
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new BasicDiagnosticFormatter(options, messages);
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String ek = options.get("expectKeys");
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if (ek != null)
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expectDiagKeys = new HashSet<String>(Arrays.asList(ek.split(", *")));
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}
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private int getIntOption(Options options, Option option, int defaultValue) {
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String s = options.get(option);
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try {
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if (s != null) {
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int n = Integer.parseInt(s);
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return (n <= 0 ? Integer.MAX_VALUE : n);
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}
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} catch (NumberFormatException e) {
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// silently ignore ill-formed numbers
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}
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return defaultValue;
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}
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/** Default value for -Xmaxerrs.
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*/
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protected int getDefaultMaxErrors() {
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return 100;
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}
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/** Default value for -Xmaxwarns.
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*/
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protected int getDefaultMaxWarnings() {
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return 100;
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}
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/** The default writer for diagnostics
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*/
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static PrintWriter defaultWriter(Context context) {
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PrintWriter result = context.get(outKey);
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if (result == null)
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context.put(outKey, result = new PrintWriter(System.err));
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return result;
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}
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/** Construct a log with default settings.
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*/
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protected Log(Context context) {
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this(context, defaultWriter(context));
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}
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/** Construct a log with all output redirected.
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*/
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protected Log(Context context, PrintWriter defaultWriter) {
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this(context, defaultWriter, defaultWriter, defaultWriter);
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}
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/** Get the Log instance for this context. */
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public static Log instance(Context context) {
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Log instance = context.get(logKey);
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if (instance == null)
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instance = new Log(context);
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return instance;
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}
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/** The number of errors encountered so far.
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*/
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public int nerrors = 0;
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/** The number of warnings encountered so far.
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*/
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public int nwarnings = 0;
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/** A set of all errors generated so far. This is used to avoid printing an
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* error message more than once. For each error, a pair consisting of the
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* source file name and source code position of the error is added to the set.
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*/
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private Set<Pair<JavaFileObject, Integer>> recorded = new HashSet<Pair<JavaFileObject,Integer>>();
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public boolean hasDiagnosticListener() {
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return diagListener != null;
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}
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public void setEndPosTable(JavaFileObject name, EndPosTable endPosTable) {
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name.getClass(); // null check
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getSource(name).setEndPosTable(endPosTable);
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}
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/** Return current sourcefile.
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*/
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public JavaFileObject currentSourceFile() {
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return source == null ? null : source.getFile();
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}
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/** Get the current diagnostic formatter.
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*/
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public DiagnosticFormatter<JCDiagnostic> getDiagnosticFormatter() {
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return diagFormatter;
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}
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/** Set the current diagnostic formatter.
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*/
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public void setDiagnosticFormatter(DiagnosticFormatter<JCDiagnostic> diagFormatter) {
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this.diagFormatter = diagFormatter;
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}
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public PrintWriter getWriter(WriterKind kind) {
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switch (kind) {
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case NOTICE: return noticeWriter;
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case WARNING: return warnWriter;
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case ERROR: return errWriter;
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default: throw new IllegalArgumentException();
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}
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}
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public void setWriter(WriterKind kind, PrintWriter pw) {
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pw.getClass();
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switch (kind) {
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case NOTICE: noticeWriter = pw; break;
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case WARNING: warnWriter = pw; break;
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case ERROR: errWriter = pw; break;
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default: throw new IllegalArgumentException();
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}
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}
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public void setWriters(PrintWriter pw) {
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pw.getClass();
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noticeWriter = warnWriter = errWriter = pw;
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}
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/**
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* Propagate the previous log's information.
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*/
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public void initRound(Log other) {
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this.noticeWriter = other.noticeWriter;
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this.warnWriter = other.warnWriter;
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this.errWriter = other.errWriter;
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this.sourceMap = other.sourceMap;
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this.recorded = other.recorded;
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this.nerrors = other.nerrors;
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this.nwarnings = other.nwarnings;
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}
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/**
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* Replace the specified diagnostic handler with the
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* handler that was current at the time this handler was created.
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* The given handler must be the currently installed handler;
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* it must be specified explicitly for clarity and consistency checking.
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*/
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public void popDiagnosticHandler(DiagnosticHandler h) {
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Assert.check(diagnosticHandler == h);
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diagnosticHandler = h.prev;
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}
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/** Flush the logs
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*/
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public void flush() {
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errWriter.flush();
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warnWriter.flush();
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noticeWriter.flush();
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}
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public void flush(WriterKind kind) {
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getWriter(kind).flush();
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}
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/** Returns true if an error needs to be reported for a given
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* source name and pos.
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*/
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protected boolean shouldReport(JavaFileObject file, int pos) {
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if (multipleErrors || file == null)
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return true;
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Pair<JavaFileObject,Integer> coords = new Pair<JavaFileObject,Integer>(file, pos);
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boolean shouldReport = !recorded.contains(coords);
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if (shouldReport)
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recorded.add(coords);
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return shouldReport;
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}
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/** Prompt user after an error.
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*/
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public void prompt() {
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if (promptOnError) {
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System.err.println(localize("resume.abort"));
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try {
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while (true) {
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switch (System.in.read()) {
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case 'a': case 'A':
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System.exit(-1);
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return;
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case 'r': case 'R':
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return;
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case 'x': case 'X':
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throw new AssertionError("user abort");
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default:
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}
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}
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} catch (IOException e) {}
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}
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}
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/** Print the faulty source code line and point to the error.
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* @param pos Buffer index of the error position, must be on current line
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*/
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private void printErrLine(int pos, PrintWriter writer) {
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String line = (source == null ? null : source.getLine(pos));
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if (line == null)
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return;
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int col = source.getColumnNumber(pos, false);
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printRawLines(writer, line);
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for (int i = 0; i < col - 1; i++) {
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writer.print((line.charAt(i) == '\t') ? "\t" : " ");
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}
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writer.println("^");
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writer.flush();
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}
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public void printNewline() {
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noticeWriter.println();
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}
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public void printNewline(WriterKind wk) {
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getWriter(wk).println();
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}
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public void printLines(String key, Object... args) {
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printRawLines(noticeWriter, localize(key, args));
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}
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public void printLines(PrefixKind pk, String key, Object... args) {
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printRawLines(noticeWriter, localize(pk, key, args));
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}
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public void printLines(WriterKind wk, String key, Object... args) {
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printRawLines(getWriter(wk), localize(key, args));
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}
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public void printLines(WriterKind wk, PrefixKind pk, String key, Object... args) {
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printRawLines(getWriter(wk), localize(pk, key, args));
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}
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|
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/** Print the text of a message, translating newlines appropriately
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|
* for the platform.
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*/
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public void printRawLines(String msg) {
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printRawLines(noticeWriter, msg);
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}
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|
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/** Print the text of a message, translating newlines appropriately
|
|
* for the platform.
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|
*/
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public void printRawLines(WriterKind kind, String msg) {
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printRawLines(getWriter(kind), msg);
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}
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|
|
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/** Print the text of a message, translating newlines appropriately
|
|
* for the platform.
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|
*/
|
|
public static void printRawLines(PrintWriter writer, String msg) {
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int nl;
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while ((nl = msg.indexOf('\n')) != -1) {
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writer.println(msg.substring(0, nl));
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msg = msg.substring(nl+1);
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}
|
|
if (msg.length() != 0) writer.println(msg);
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}
|
|
|
|
/**
|
|
* Print the localized text of a "verbose" message to the
|
|
* noticeWriter stream.
|
|
*/
|
|
public void printVerbose(String key, Object... args) {
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printRawLines(noticeWriter, localize("verbose." + key, args));
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|
}
|
|
|
|
protected void directError(String key, Object... args) {
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printRawLines(errWriter, localize(key, args));
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errWriter.flush();
|
|
}
|
|
|
|
/** 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++;
|
|
}
|
|
|
|
/**
|
|
* Primary method to report a diagnostic.
|
|
* @param diagnostic
|
|
*/
|
|
public void report(JCDiagnostic diagnostic) {
|
|
diagnosticHandler.report(diagnostic);
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
private class DefaultDiagnosticHandler extends DiagnosticHandler {
|
|
public void report(JCDiagnostic diagnostic) {
|
|
if (expectDiagKeys != null)
|
|
expectDiagKeys.remove(diagnostic.getCode());
|
|
|
|
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()) && !suppressNotes) {
|
|
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;
|
|
}
|
|
if (diagnostic.isFlagSet(JCDiagnostic.DiagnosticFlag.COMPRESSED)) {
|
|
compressedOutput = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Write out a diagnostic.
|
|
*/
|
|
protected void writeDiagnostic(JCDiagnostic diag) {
|
|
if (diagListener != null) {
|
|
diagListener.report(diag);
|
|
return;
|
|
}
|
|
|
|
PrintWriter writer = getWriterForDiagnosticType(diag.getType());
|
|
|
|
printRawLines(writer, diagFormatter.format(diag, messages.getCurrentLocale()));
|
|
|
|
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.
|
|
* Because this method is static, it ignores the locale.
|
|
* Use localize(key, args) when possible.
|
|
* @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 JavacMessages.getDefaultLocalizedString(PrefixKind.COMPILER_MISC.key(key), args);
|
|
}
|
|
|
|
/** 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 String localize(String key, Object... args) {
|
|
return localize(PrefixKind.COMPILER_MISC, key, args);
|
|
}
|
|
|
|
/** 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 String localize(PrefixKind pk, String key, Object... args) {
|
|
if (useRawMessages)
|
|
return pk.key(key);
|
|
else
|
|
return messages.getLocalizedString(pk.key(key), args);
|
|
}
|
|
// where
|
|
// backdoor hook for testing, should transition to use -XDrawDiagnostics
|
|
private static boolean useRawMessages = false;
|
|
|
|
/***************************************************************************
|
|
* 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 (source == null || pos == Position.NOPOS) {
|
|
printRawLines(errWriter, "error: " + msg);
|
|
} else {
|
|
int line = source.getLineNumber(pos);
|
|
JavaFileObject file = source.getFile();
|
|
if (file != null)
|
|
printRawLines(errWriter,
|
|
file.getName() + ":" +
|
|
line + ": " + msg);
|
|
printErrLine(pos, errWriter);
|
|
}
|
|
errWriter.flush();
|
|
}
|
|
|
|
/** report an error:
|
|
*/
|
|
public void rawError(int pos, String msg) {
|
|
if (nerrors < MaxErrors && shouldReport(currentSourceFile(), 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();
|
|
}
|
|
|
|
public static String format(String fmt, Object... args) {
|
|
return String.format((java.util.Locale)null, fmt, args);
|
|
}
|
|
|
|
}
|