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A repackaged copy of javac for Error Prone to depend on
/*
* Copyright (c) 2012, 2016, 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.doclint;
import java.util.Arrays;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.regex.Pattern;
import javax.lang.model.element.Element;
import javax.lang.model.element.ElementKind;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.Modifier;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.Elements;
import javax.lang.model.util.Types;
import javax.tools.Diagnostic.Kind;
import com.sun.source.doctree.DocCommentTree;
import com.sun.source.tree.CompilationUnitTree;
import com.sun.source.util.DocTrees;
import com.sun.source.util.JavacTask;
import com.sun.source.util.SourcePositions;
import com.sun.source.util.TreePath;
import com.sun.tools.javac.model.JavacTypes;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.util.MatchingUtils;
import com.sun.tools.javac.util.StringUtils;
/**
* Utility container for current execution environment,
* providing the current declaration and its doc comment.
*
* 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.
*/
public class Env {
/**
* Access kinds for declarations.
*/
public enum AccessKind {
PRIVATE,
PACKAGE,
PROTECTED,
PUBLIC;
static boolean accepts(String opt) {
for (AccessKind g: values())
if (opt.equals(StringUtils.toLowerCase(g.name()))) return true;
return false;
}
static AccessKind of(Set mods) {
if (mods.contains(Modifier.PUBLIC))
return AccessKind.PUBLIC;
else if (mods.contains(Modifier.PROTECTED))
return AccessKind.PROTECTED;
else if (mods.contains(Modifier.PRIVATE))
return AccessKind.PRIVATE;
else
return AccessKind.PACKAGE;
}
}
/** Message handler. */
final Messages messages;
int implicitHeaderLevel = 0;
Set customTags;
Set includePackages;
Set excludePackages;
HtmlVersion htmlVersion = HtmlVersion.HTML4;
// Utility classes
DocTrees trees;
Elements elements;
Types types;
// Types used when analysing doc comments.
TypeMirror java_lang_Error;
TypeMirror java_lang_RuntimeException;
TypeMirror java_lang_Throwable;
TypeMirror java_lang_Void;
/** The path for the declaration containing the comment currently being analyzed. */
TreePath currPath;
/** The element for the declaration containing the comment currently being analyzed. */
Element currElement;
/** The comment current being analyzed. */
DocCommentTree currDocComment;
/**
* The access kind of the declaration containing the comment currently being analyzed.
* This is the minimum (most restrictive) access kind of the declaration itself
* and that of its containers. For example, a public method in a private class is
* noted as private.
*/
AccessKind currAccess;
/** The set of methods, if any, that the current declaration overrides. */
Set currOverriddenMethods;
Env() {
messages = new Messages(this);
}
void init(JavacTask task) {
init(DocTrees.instance(task), task.getElements(), task.getTypes());
}
void init(DocTrees trees, Elements elements, Types types) {
this.trees = trees;
this.elements = elements;
this.types = types;
}
void initTypes() {
if (java_lang_Error != null)
return ;
java_lang_Error = elements.getTypeElement("java.lang.Error").asType();
java_lang_RuntimeException = elements.getTypeElement("java.lang.RuntimeException").asType();
java_lang_Throwable = elements.getTypeElement("java.lang.Throwable").asType();
java_lang_Void = elements.getTypeElement("java.lang.Void").asType();
}
void setImplicitHeaders(int n) {
implicitHeaderLevel = n;
}
void setCustomTags(String cTags) {
customTags = new LinkedHashSet<>();
for (String s : cTags.split(DocLint.SEPARATOR)) {
if (!s.isEmpty())
customTags.add(s);
}
}
void setCheckPackages(String packages) {
includePackages = new HashSet<>();
excludePackages = new HashSet<>();
for (String pack : packages.split(DocLint.SEPARATOR)) {
boolean excluded = false;
if (pack.startsWith("-")) {
pack = pack.substring(1);
excluded = true;
}
if (pack.isEmpty())
continue;
Pattern pattern = MatchingUtils.validImportStringToPattern(pack);
if (excluded) {
excludePackages.add(pattern);
} else {
includePackages.add(pattern);
}
}
}
static boolean validatePackages(String packages) {
for (String pack : packages.split(DocLint.SEPARATOR)) {
if (pack.startsWith("-")) {
pack = pack.substring(1);
}
if (!pack.isEmpty() && !MatchingUtils.isValidImportString(pack))
return false;
}
return true;
}
void setHtmlVersion(HtmlVersion version) {
htmlVersion = version;
}
/** Set the current declaration and its doc comment. */
void setCurrent(TreePath path, DocCommentTree comment) {
currPath = path;
currDocComment = comment;
currElement = trees.getElement(currPath);
currOverriddenMethods = ((JavacTypes) types).getOverriddenMethods(currElement);
AccessKind ak = AccessKind.PUBLIC;
for (TreePath p = path; p != null; p = p.getParentPath()) {
Element e = trees.getElement(p);
if (e != null && e.getKind() != ElementKind.PACKAGE && e.getKind() != ElementKind.MODULE) {
ak = min(ak, AccessKind.of(e.getModifiers()));
}
}
currAccess = ak;
}
AccessKind getAccessKind() {
return currAccess;
}
long getPos(TreePath p) {
return ((JCTree) p.getLeaf()).pos;
}
long getStartPos(TreePath p) {
SourcePositions sp = trees.getSourcePositions();
return sp.getStartPosition(p.getCompilationUnit(), p.getLeaf());
}
boolean shouldCheck(CompilationUnitTree unit) {
if (includePackages == null)
return true;
String packageName = unit.getPackageName() != null
? unit.getPackageName().toString()
: "";
if (!includePackages.isEmpty()) {
boolean included = false;
for (Pattern pack : includePackages) {
if (pack.matcher(packageName).matches()) {
included = true;
break;
}
}
if (!included)
return false;
}
for (Pattern pack : excludePackages) {
if (pack.matcher(packageName).matches()) {
return false;
}
}
return true;
}
private > T min(T item1, T item2) {
return (item1 == null) ? item2
: (item2 == null) ? item1
: item1.compareTo(item2) <= 0 ? item1 : item2;
}
}