jdk8-mips64-public/langtools: comparison src/share/classes/com/sun/tools/javac/code/Lint.java

--1:000000000000
+:959103a6100f
+/*
+* 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;
+/**
+* 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 / file comparison

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

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