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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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package jdk.javadoc.internal.tool;

import java.nio.file.Files;
import java.nio.file.InvalidPathException;
import java.nio.file.Paths;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

import javax.lang.model.element.Element;
import javax.lang.model.element.ElementKind;
import javax.tools.JavaFileObject;
import javax.tools.StandardJavaFileManager;

import com.sun.tools.javac.code.ClassFinder;
import com.sun.tools.javac.code.DeferredCompletionFailureHandler;
import com.sun.tools.javac.code.Symbol.Completer;
import com.sun.tools.javac.code.Symbol.CompletionFailure;
import com.sun.tools.javac.code.Symbol.PackageSymbol;
import com.sun.tools.javac.comp.Enter;
import com.sun.tools.javac.tree.JCTree;
import com.sun.tools.javac.tree.JCTree.JCClassDecl;
import com.sun.tools.javac.tree.JCTree.JCCompilationUnit;
import com.sun.tools.javac.util.Abort;
import com.sun.tools.javac.util.Context;
import com.sun.tools.javac.util.ListBuffer;
import com.sun.tools.javac.util.Position;
import jdk.javadoc.doclet.DocletEnvironment;

import static jdk.javadoc.internal.tool.Main.Result.*;

This class could be the main entry point for Javadoc when Javadoc is used as a component in a larger software system. It provides operations to construct a new javadoc processor, and to run it on a set of source files.

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.

/** * This class could be the main entry point for Javadoc when Javadoc is used as a * component in a larger software system. It provides operations to * construct a new javadoc processor, and to run it on a set of source * files. * * <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 JavadocTool extends com.sun.tools.javac.main.JavaCompiler { ToolEnvironment toolEnv; final Messager messager; final ClassFinder javadocFinder; final DeferredCompletionFailureHandler dcfh; final Enter javadocEnter; final Set<JavaFileObject> uniquefiles;
Construct a new JavaCompiler processor, using appropriately extended phases of the underlying compiler.
/** * Construct a new JavaCompiler processor, using appropriately * extended phases of the underlying compiler. */
protected JavadocTool(Context context) { super(context); messager = Messager.instance0(context); javadocFinder = JavadocClassFinder.instance(context); dcfh = DeferredCompletionFailureHandler.instance(context); javadocEnter = JavadocEnter.instance(context); uniquefiles = new HashSet<>(); }
For javadoc, the parser needs to keep comments. Overrides method from JavaCompiler.
/** * For javadoc, the parser needs to keep comments. Overrides method from JavaCompiler. */
@Override protected boolean keepComments() { return true; }
Construct a new javadoc tool.
/** * Construct a new javadoc tool. */
public static JavadocTool make0(Context context) { Messager messager = null; try { // force the use of Javadoc's class finder JavadocClassFinder.preRegister(context); // force the use of Javadoc's own enter phase JavadocEnter.preRegister(context); // force the use of Javadoc's own member enter phase JavadocMemberEnter.preRegister(context); // force the use of Javadoc's own todo phase JavadocTodo.preRegister(context); // force the use of Messager as a Log messager = Messager.instance0(context); return new JavadocTool(context); } catch (CompletionFailure ex) { assert messager != null; messager.error(Position.NOPOS, ex.getMessage()); return null; } } public DocletEnvironment getEnvironment(ToolOptions toolOptions, List<String> javaNames, Iterable<? extends JavaFileObject> fileObjects) throws ToolException { toolEnv = ToolEnvironment.instance(context); toolEnv.initialize(toolOptions); ElementsTable etable = new ElementsTable(context, toolOptions); javadocFinder.sourceCompleter = etable.xclasses ? Completer.NULL_COMPLETER : sourceCompleter; if (etable.xclasses) { // If -Xclasses is set, the args should be a list of class names for (String arg: javaNames) { if (!isValidPackageName(arg)) { // checks String text = messager.getText("main.illegal_class_name", arg); throw new ToolException(CMDERR, text); } } if (messager.hasErrors()) { return null; } etable.setClassArgList(javaNames); // prepare, force the data structures to be analyzed etable.analyze(); return new DocEnvImpl(toolEnv, etable); } ListBuffer<JCCompilationUnit> classTrees = new ListBuffer<>(); try { StandardJavaFileManager fm = toolEnv.fileManager instanceof StandardJavaFileManager ? (StandardJavaFileManager) toolEnv.fileManager : null; Set<String> packageNames = new LinkedHashSet<>(); // Normally, the args should be a series of package names or file names. // Parse the files and collect the package names. for (String arg: javaNames) { if (fm != null && arg.endsWith(".java") && isRegularFile(arg)) { parse(fm.getJavaFileObjects(arg), classTrees, true); } else if (isValidPackageName(arg)) { packageNames.add(arg); } else if (arg.endsWith(".java")) { if (fm == null) { String text = messager.getText("main.assertion.error", "fm == null"); throw new ToolException(ABNORMAL, text); } else { String text = messager.getText("main.file_not_found", arg); throw new ToolException(ERROR, text); } } else { String text = messager.getText("main.illegal_package_name", arg); throw new ToolException(CMDERR, text); } } // Parse file objects provide via the DocumentationTool API parse(fileObjects, classTrees, true); etable.packages(packageNames) .classTrees(classTrees.toList()) .scanSpecifiedItems(); // abort, if errors were encountered during modules initialization if (messager.hasErrors()) { return null; } // Parse the files in the packages and subpackages to be documented ListBuffer<JCCompilationUnit> allTrees = new ListBuffer<>(); allTrees.addAll(classTrees); parse(etable.getFilesToParse(), allTrees, false); modules.newRound(); modules.initModules(allTrees.toList()); if (messager.hasErrors()) { return null; } // Enter symbols for all files toolEnv.notice("main.Building_tree"); javadocEnter.main(allTrees.toList()); if (messager.hasErrors()) { return null; } etable.setClassDeclList(listClasses(classTrees.toList())); dcfh.setHandler(dcfh.userCodeHandler); etable.analyze(); // Ensure that package-info is read for all included packages for (Element e : etable.getIncludedElements()) { if (e.getKind() == ElementKind.PACKAGE) { PackageSymbol p = (PackageSymbol) e; if (p.package_info != null) { p.package_info.complete(); } } } } catch (CompletionFailure cf) { throw new ToolException(ABNORMAL, cf.getMessage(), cf); } catch (Abort abort) { if (messager.hasErrors()) { // presumably a message has been emitted, keep silent throw new ToolException(ABNORMAL, "", abort); } else { String text = messager.getText("main.internal.error"); Throwable t = abort.getCause() == null ? abort : abort.getCause(); throw new ToolException(ABNORMAL, text, t); } } if (messager.hasErrors()) return null; toolEnv.docEnv = new DocEnvImpl(toolEnv, etable); return toolEnv.docEnv; } private boolean isRegularFile(String s) { try { return Files.isRegularFile(Paths.get(s)); } catch (InvalidPathException e) { return false; } }
Is the given string a valid package name?
/** Is the given string a valid package name? */
boolean isValidPackageName(String s) { if (s.contains("/")) { String[] a = s.split("/"); if (a.length == 2) { return isValidPackageName0(a[0]) && isValidPackageName0(a[1]); } return false; } return isValidPackageName0(s); } private boolean isValidPackageName0(String s) { for (int index = s.indexOf('.') ; index != -1; index = s.indexOf('.')) { if (!isValidClassName(s.substring(0, index))) { return false; } s = s.substring(index + 1); } return isValidClassName(s); } private void parse(Iterable<? extends JavaFileObject> files, ListBuffer<JCCompilationUnit> trees, boolean trace) { for (JavaFileObject fo: files) { if (uniquefiles.add(fo)) { // ignore duplicates if (trace) toolEnv.notice("main.Loading_source_file", fo.getName()); trees.append(parse(fo)); } } }
Are surrogates supported?
/** Are surrogates supported? */
static final boolean surrogatesSupported = surrogatesSupported(); private static boolean surrogatesSupported() { try { boolean b = Character.isHighSurrogate('a'); return true; } catch (NoSuchMethodError ex) { return false; } }
Return true if given file name is a valid class name (including "package-info").
Params:
  • s – the name of the class to check.
Returns:true if given class name is a valid class name and false otherwise.
/** * Return true if given file name is a valid class name * (including "package-info"). * @param s the name of the class to check. * @return true if given class name is a valid class name * and false otherwise. */
public static boolean isValidClassName(String s) { if (s.length() < 1) return false; if (s.equals("package-info")) return true; if (surrogatesSupported) { int cp = s.codePointAt(0); if (!Character.isJavaIdentifierStart(cp)) return false; for (int j = Character.charCount(cp); j < s.length(); j += Character.charCount(cp)) { cp = s.codePointAt(j); if (!Character.isJavaIdentifierPart(cp)) return false; } } else { if (!Character.isJavaIdentifierStart(s.charAt(0))) return false; for (int j = 1; j < s.length(); j++) if (!Character.isJavaIdentifierPart(s.charAt(j))) return false; } return true; }
From a list of top level trees, return the list of contained class definitions
/** * From a list of top level trees, return the list of contained class definitions */
List<JCClassDecl> listClasses(List<JCCompilationUnit> trees) { List<JCClassDecl> result = new ArrayList<>(); for (JCCompilationUnit t : trees) { for (JCTree def : t.defs) { if (def.hasTag(JCTree.Tag.CLASSDEF)) result.add((JCClassDecl)def); } } return result; } }