jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/code/Lint.java@4a6acc42c3a1 (annotated)

src/share/classes/com/sun/tools/javac/code/Lint.java@4a6acc42c3a1 (annotated)

src/share/classes/com/sun/tools/javac/code/Lint.java

Mon, 02 Sep 2013 22:38:36 +0100

author: vromero
date: Mon, 02 Sep 2013 22:38:36 +0100
changeset 2000: 4a6acc42c3a1
parent 1802: 8fb68f73d4b1
child 2027: 4932bb04c4b8
permissions: -rw-r--r--

8016177: structural most specific and stuckness
Reviewed-by: jjg, vromero
Contributed-by: maurizio.cimadamore@oracle.com

 /*
  * Copyright (c) 2005, 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.code;
 import java.util.EnumSet;
 import java.util.Map;
 import com.sun.tools.javac.code.Symbol.*;
 import com.sun.tools.javac.util.Context;
 import com.sun.tools.javac.util.List;
 import com.sun.tools.javac.util.Options;
 import com.sun.tools.javac.util.Pair;
 import static com.sun.tools.javac.code.Flags.*;
 /**
  * A class for handling -Xlint suboptions and @SuppresssWarnings.
  *
  *  <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 Lint
 {
     /** The context key for the root Lint object. */
     protected static final Context.Key<Lint> lintKey = new Context.Key<Lint>();
     /** Get the root Lint instance. */
     public static Lint instance(Context context) {
         Lint instance = context.get(lintKey);
         if (instance == null)
             instance = new Lint(context);
         return instance;
     }
     /**
      * Returns the result of combining the values in this object with
      * the given annotation.
      */
     public Lint augment(Attribute.Compound attr) {
         return augmentor.augment(this, attr);
     }
     /**
      * Returns the result of combining the values in this object with
      * the metadata on the given symbol.
      */
     public Lint augment(Symbol sym) {
         Lint l = augmentor.augment(this, sym.getDeclarationAttributes());
         if (sym.isDeprecated()) {
             if (l == this)
                 l = new Lint(this);
             l.values.remove(LintCategory.DEPRECATION);
             l.suppressedValues.add(LintCategory.DEPRECATION);
         }
         return l;
     }
     private final AugmentVisitor augmentor;
     private final EnumSet<LintCategory> values;
     private final EnumSet<LintCategory> suppressedValues;
     private static final Map<String, LintCategory> map =
             new java.util.concurrent.ConcurrentHashMap<String, LintCategory>(20);
     protected Lint(Context context) {
         // initialize values according to the lint options
         Options options = Options.instance(context);
         values = EnumSet.noneOf(LintCategory.class);
         for (Map.Entry<String, LintCategory> e: map.entrySet()) {
             if (options.lint(e.getKey()))
                 values.add(e.getValue());
         }
         suppressedValues = EnumSet.noneOf(LintCategory.class);
         context.put(lintKey, this);
         augmentor = new AugmentVisitor(context);
     }
     protected Lint(Lint other) {
         this.augmentor = other.augmentor;
         this.values = other.values.clone();
         this.suppressedValues = other.suppressedValues.clone();
     }
     @Override
     public String toString() {
         return "Lint:[values" + values + " suppressedValues" + suppressedValues + "]";
     }
     /**
      * Categories of warnings that can be generated by the compiler.
      */
     public enum LintCategory {
         /**
          * Warn when code refers to a auxiliary class that is hidden in a source file (ie source file name is
          * different from the class name, and the type is not properly nested) and the referring code
          * is not located in the same source file.
          */
         AUXILIARYCLASS("auxiliaryclass"),
         /**
          * Warn about use of unnecessary casts.
          */
         CAST("cast"),
         /**
          * Warn about issues related to classfile contents
          */
         CLASSFILE("classfile"),
         /**
          * Warn about use of deprecated items.
          */
         DEPRECATION("deprecation"),
         /**
          * Warn about items which are documented with an {@code @deprecated} JavaDoc
          * comment, but which do not have {@code @Deprecated} annotation.
          */
         DEP_ANN("dep-ann"),
         /**
          * Warn about division by constant integer 0.
          */
         DIVZERO("divzero"),
         /**
          * Warn about empty statement after if.
          */
         EMPTY("empty"),
         /**
          * Warn about falling through from one case of a switch statement to the next.
          */
         FALLTHROUGH("fallthrough"),
         /**
          * Warn about finally clauses that do not terminate normally.
          */
         FINALLY("finally"),
         /**
          * Warn about issues relating to use of command line options
          */
         OPTIONS("options"),
         /**
          * Warn about issues regarding method overloads.
          */
         OVERLOADS("overloads"),
         /**
          * Warn about issues regarding method overrides.
          */
         OVERRIDES("overrides"),
         /**
          * Warn about invalid path elements on the command line.
          * Such warnings cannot be suppressed with the SuppressWarnings
          * annotation.
          */
         PATH("path"),
         /**
          * Warn about issues regarding annotation processing.
          */
         PROCESSING("processing"),
         /**
          * Warn about unchecked operations on raw types.
          */
         RAW("rawtypes"),
         /**
          * Warn about Serializable classes that do not provide a serial version ID.
          */
         SERIAL("serial"),
         /**
          * Warn about issues relating to use of statics
          */
         STATIC("static"),
         /**
          * Warn about proprietary API that may be removed in a future release.
          */
         SUNAPI("sunapi", true),
         /**
          * Warn about issues relating to use of try blocks (i.e. try-with-resources)
          */
         TRY("try"),
         /**
          * Warn about unchecked operations on raw types.
          */
         UNCHECKED("unchecked"),
         /**
          * Warn about potentially unsafe vararg methods
          */
         VARARGS("varargs");
         LintCategory(String option) {
             this(option, false);
         }
         LintCategory(String option, boolean hidden) {
             this.option = option;
             this.hidden = hidden;
             map.put(option, this);
         }
         static LintCategory get(String option) {
             return map.get(option);
         }
         public final String option;
         public final boolean hidden;
     };
     /**
      * Checks if a warning category is enabled. A warning category may be enabled
      * on the command line, or by default, and can be temporarily disabled with
      * the SuppressWarnings annotation.
      */
     public boolean isEnabled(LintCategory lc) {
         return values.contains(lc);
     }
     /**
      * Checks is a warning category has been specifically suppressed, by means
      * of the SuppressWarnings annotation, or, in the case of the deprecated
      * category, whether it has been implicitly suppressed by virtue of the
      * current entity being itself deprecated.
      */
     public boolean isSuppressed(LintCategory lc) {
         return suppressedValues.contains(lc);
     }
     protected static class AugmentVisitor implements Attribute.Visitor {
         private final Context context;
         private Symtab syms;
         private Lint parent;
         private Lint lint;
         AugmentVisitor(Context context) {
             // to break an ugly sequence of initialization dependencies,
             // we defer the initialization of syms until it is needed
             this.context = context;
         }
         Lint augment(Lint parent, Attribute.Compound attr) {
             initSyms();
             this.parent = parent;
             lint = null;
             attr.accept(this);
             return (lint == null ? parent : lint);
         }
         Lint augment(Lint parent, List<Attribute.Compound> attrs) {
             initSyms();
             this.parent = parent;
             lint = null;
             for (Attribute.Compound a: attrs) {
                 a.accept(this);
             }
             return (lint == null ? parent : lint);
         }
         private void initSyms() {
             if (syms == null)
                 syms = Symtab.instance(context);
         }
         private void suppress(LintCategory lc) {
             if (lint == null)
                 lint = new Lint(parent);
             lint.suppressedValues.add(lc);
             lint.values.remove(lc);
         }
         public void visitConstant(Attribute.Constant value) {
             if (value.type.tsym == syms.stringType.tsym) {
                 LintCategory lc = LintCategory.get((String) (value.value));
                 if (lc != null)
                     suppress(lc);
             }
         }
         public void visitClass(Attribute.Class clazz) {
         }
         // If we find a @SuppressWarnings annotation, then we continue
         // walking the tree, in order to suppress the individual warnings
         // specified in the @SuppressWarnings annotation.
         public void visitCompound(Attribute.Compound compound) {
             if (compound.type.tsym == syms.suppressWarningsType.tsym) {
                 for (List<Pair<MethodSymbol,Attribute>> v = compound.values;
                      v.nonEmpty(); v = v.tail) {
                     Pair<MethodSymbol,Attribute> value = v.head;
                     if (value.fst.name.toString().equals("value"))
                         value.snd.accept(this);
                 }
             }
         }
         public void visitArray(Attribute.Array array) {
             for (Attribute value : array.values)
                 value.accept(this);
         }
         public void visitEnum(Attribute.Enum e) {
         }
         public void visitError(Attribute.Error e) {
         }
     };
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/code/Lint.java@4a6acc42c3a1 (annotated)

src/share/classes/com/sun/tools/javac/code/Lint.java