Mercurial > jdk8-mips64-public > langtools / file revision

 /*

  * Copyright (c) 2003, 2013, 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.EnumSet;

 import java.util.Locale;

 import java.util.Set;

 import javax.tools.Diagnostic;

 import javax.tools.JavaFileObject;

 import com.sun.tools.javac.api.DiagnosticFormatter;

 import com.sun.tools.javac.code.Lint.LintCategory;

 import com.sun.tools.javac.tree.EndPosTable;

 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;

         }

         DiagnosticFormatter<JCDiagnostic> formatter;

         final String prefix;

         final Set<DiagnosticFlag> defaultErrorFlags;

         /** Create a new diagnostic factory. */

         protected Factory(Context context) {

             this(JavacMessages.instance(context), "compiler");

             context.put(diagnosticFactoryKey, this);

             final Options options = Options.instance(context);

             initOptions(options);

             options.addListener(new Runnable() {

                public void run() {

                    initOptions(options);

                }

             });

         }

         private void initOptions(Options options) {

             if (options.isSet("onlySyntaxErrorsUnrecoverable"))

                 defaultErrorFlags.add(DiagnosticFlag.RECOVERABLE);

         }

         /** Create a new diagnostic factory. */

         public Factory(JavacMessages messages, String prefix) {

             this.prefix = prefix;

             this.formatter = new BasicDiagnosticFormatter(messages);

             defaultErrorFlags = EnumSet.of(DiagnosticFlag.MANDATORY);

         }

         /**

          * 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 create(ERROR, null, defaultErrorFlags, source, pos, 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 warning message.

          *  @param args   Fields of the warning message.

          *  @see MandatoryWarningHandler

          */

         public JCDiagnostic mandatoryWarning(

                 DiagnosticSource source, DiagnosticPosition pos, String key, Object... args) {

             return create(WARNING, null, EnumSet.of(DiagnosticFlag.MANDATORY), source, pos, key, args);

         }

         /**

          * Create a warning diagnostic that will not be hidden by the -nowarn or -Xlint:none options.

          *  @param lc     The lint category for the 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 warning message.

          *  @param args   Fields of the warning message.

          *  @see MandatoryWarningHandler

          */

         public JCDiagnostic mandatoryWarning(

                 LintCategory lc,

                 DiagnosticSource source, DiagnosticPosition pos, String key, Object... args) {

             return create(WARNING, lc, EnumSet.of(DiagnosticFlag.MANDATORY), source, pos, key, args);

         }

         /**

          * Create a warning diagnostic.

          *  @param lc     The lint category for the diagnostic

          *  @param key    The key for the localized error message.

          *  @param args   Fields of the warning message.

          *  @see MandatoryWarningHandler

          */

         public JCDiagnostic warning(

                  LintCategory lc, String key, Object... args) {

             return create(WARNING, lc, EnumSet.noneOf(DiagnosticFlag.class), null, null, 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 warning message.

          *  @param args   Fields of the warning message.

          */

         public JCDiagnostic warning(

                 DiagnosticSource source, DiagnosticPosition pos, String key, Object... args) {

             return create(WARNING, null, EnumSet.noneOf(DiagnosticFlag.class), source, pos, key, args);

         }

         /**

          * Create a warning diagnostic.

          *  @param lc     The lint category for the 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 warning message.

          *  @param args   Fields of the warning message.

          *  @see MandatoryWarningHandler

          */

         public JCDiagnostic warning(

                  LintCategory lc, DiagnosticSource source, DiagnosticPosition pos, String key, Object... args) {

             return create(WARNING, lc, EnumSet.noneOf(DiagnosticFlag.class), source, pos, 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 message.

          *  @param args   Fields of the message.

          *  @see MandatoryWarningHandler

          */

         public JCDiagnostic mandatoryNote(DiagnosticSource source, String key, Object... args) {

             return create(NOTE, null, EnumSet.of(DiagnosticFlag.MANDATORY), source, null, key, args);

         }

         /**

          * Create a note diagnostic.

          *  @param key    The key for the localized error message.

          *  @param args   Fields of the message.

          */

         public JCDiagnostic note(String key, Object... args) {

             return create(NOTE, null, EnumSet.noneOf(DiagnosticFlag.class), 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 message.

          *  @param args   Fields of the message.

          */

         public JCDiagnostic note(

                 DiagnosticSource source, DiagnosticPosition pos, String key, Object... args) {

             return create(NOTE, null, EnumSet.noneOf(DiagnosticFlag.class), source, pos, key, args);

         }

         /**

          * Create a fragment diagnostic, for use as an argument in other diagnostics

          *  @param key    The key for the localized message.

          *  @param args   Fields of the message.

          */

         public JCDiagnostic fragment(String key, Object... args) {

             return create(FRAGMENT, null, EnumSet.noneOf(DiagnosticFlag.class), null, null, key, args);

         }

         /**

          * Create a new diagnostic of the given kind, which is not mandatory and which has

          * no lint category.

          *  @param kind        The diagnostic kind

          *  @param source      The source of the compilation unit, if any, in which to report the message.

          *  @param pos         The source position at which to report the message.

          *  @param key         The key for the localized message.

          *  @param args        Fields of the message.

          */

         public JCDiagnostic create(

                 DiagnosticType kind, DiagnosticSource source, DiagnosticPosition pos, String key, Object... args) {

             return create(kind, null, EnumSet.noneOf(DiagnosticFlag.class), source, pos, key, args);

         }

         /**

          * Create a new diagnostic of the given kind.

          *  @param kind        The diagnostic kind

          *  @param lc          The lint category, if applicable, or null

          *  @param flags       The set of flags for the diagnostic

          *  @param source      The source of the compilation unit, if any, in which to report the message.

          *  @param pos         The source position at which to report the message.

          *  @param key         The key for the localized message.

          *  @param args        Fields of the message.

          */

         public JCDiagnostic create(

                 DiagnosticType kind, LintCategory lc, Set<DiagnosticFlag> flags, DiagnosticSource source, DiagnosticPosition pos, String key, Object... args) {

             return new JCDiagnostic(formatter, kind, lc, flags, source, pos, qualify(kind, 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.

      *

      */

     @Deprecated

     public static JCDiagnostic fragment(String key, Object... args) {

         return new JCDiagnostic(getFragmentFormatter(),

                               FRAGMENT,

                               null,

                               EnumSet.noneOf(DiagnosticFlag.class),

                               null,

                               null,

                               "compiler." + FRAGMENT.key + "." + key,

                               args);

     }

     //where

     @Deprecated

     public static DiagnosticFormatter<JCDiagnostic> getFragmentFormatter() {

         if (fragmentFormatter == null) {

             fragmentFormatter = new BasicDiagnosticFormatter(JavacMessages.getDefaultMessages());

         }

         return fragmentFormatter;

     }

     /**

      * 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(EndPosTable 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(EndPosTable endPosTable) {

             return pos;

         }

         private final int pos;

     }

     public enum DiagnosticFlag {

         MANDATORY,

         RESOLVE_ERROR,

         SYNTAX,

         RECOVERABLE,

         NON_DEFERRABLE,

         COMPRESSED

     }

     private final DiagnosticType type;

     private final DiagnosticSource source;

     private final DiagnosticPosition position;

     private final int line;

     private final int column;

     private final String key;

     protected final Object[] args;

     private final Set<DiagnosticFlag> flags;

     private final LintCategory lintCategory;

     /**

      * Create a diagnostic object.

      * @param formatter the formatter to use for the diagnostic

      * @param dt the type of diagnostic

      * @param lc     the lint category for the diagnostic

      * @param source 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(DiagnosticFormatter<JCDiagnostic> formatter,

                        DiagnosticType dt,

                        LintCategory lc,

                        Set<DiagnosticFlag> flags,

                        DiagnosticSource source,

                        DiagnosticPosition pos,

                        String key,

                        Object... args) {

         if (source == null && pos != null && pos.getPreferredPosition() != Position.NOPOS)

             throw new IllegalArgumentException();

         this.defaultFormatter = formatter;

         this.type = dt;

         this.lintCategory = lc;

         this.flags = flags;

         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, true);

         }

     }

     /**

      * Get the type of this diagnostic.

      * @return the type of this diagnostic

      */

     public DiagnosticType getType() {

         return type;

     }

     /**

      * Get the subdiagnostic list

      * @return subdiagnostic list

      */

     public List<JCDiagnostic> getSubdiagnostics() {

         return List.nil();

     }

     public boolean isMultiline() {

         return false;

     }

     /**

      * 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 flags.contains(DiagnosticFlag.MANDATORY);

     }

     /**

      * Check whether this diagnostic has an associated lint category.

      */

     public boolean hasLintCategory() {

         return (lintCategory != null);

     }

     /**

      * Get the associated lint category, or null if none.

      */

     public LintCategory getLintCategory() {

         return lintCategory;

     }

     /**

      * 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 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();

     }

     public DiagnosticPosition getDiagnosticPosition() {

         return position;

     }

     /**

      * 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) {

         return defaultFormatter.formatKind(this, Locale.getDefault());

     }

     /**

      * Return the standard presentation of this diagnostic.

      */

     @Override

     public String toString() {

         return defaultFormatter.format(this,Locale.getDefault());

     }

     private DiagnosticFormatter<JCDiagnostic> defaultFormatter;

     @Deprecated

     private static DiagnosticFormatter<JCDiagnostic> fragmentFormatter;

     // Methods for javax.tools.Diagnostic

     public Diagnostic.Kind getKind() {

         switch (type) {

         case NOTE:

             return Diagnostic.Kind.NOTE;

         case WARNING:

             return flags.contains(DiagnosticFlag.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) {

         return defaultFormatter.formatMessage(this, locale);

     }

     public void setFlag(DiagnosticFlag flag) {

         flags.add(flag);

         if (type == DiagnosticType.ERROR) {

             switch (flag) {

                 case SYNTAX:

                     flags.remove(DiagnosticFlag.RECOVERABLE);

                     break;

                 case RESOLVE_ERROR:

                     flags.add(DiagnosticFlag.RECOVERABLE);

                     break;

             }

         }

     }

     public boolean isFlagSet(DiagnosticFlag flag) {

         return flags.contains(flag);

     }

     public static class MultilineDiagnostic extends JCDiagnostic {

         private final List<JCDiagnostic> subdiagnostics;

         public MultilineDiagnostic(JCDiagnostic other, List<JCDiagnostic> subdiagnostics) {

             super(other.defaultFormatter,

                   other.getType(),

                   other.getLintCategory(),

                   other.flags,

                   other.getDiagnosticSource(),

                   other.position,

                   other.getCode(),

                   other.getArgs());

             this.subdiagnostics = subdiagnostics;

         }

         @Override

         public List<JCDiagnostic> getSubdiagnostics() {

             return subdiagnostics;

         }

         @Override

         public boolean isMultiline() {

             return true;

         }

     }

 }