Java example source code file (JavadocEnter.java)

This example Java source code file (JavadocEnter.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

classsymbol, docenv, enter, javadocenter, messager, override

The JavadocEnter.java Java example source code

/*
 * Copyright (c) 2001, 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.javadoc;

import javax.tools.JavaFileObject;

import com.sun.tools.javac.code.Kinds;
import com.sun.tools.javac.code.Symbol.*;
import com.sun.tools.javac.comp.Enter;
import com.sun.tools.javac.tree.JCTree.*;
import com.sun.tools.javac.util.Context;
import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
import com.sun.tools.javac.util.List;

/**
 *  Javadoc's own enter phase does a few things above and beyond that
 *  done by javac.
 *
 *  <p>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>
 *
 *  @author Neal Gafter
 */
public class JavadocEnter extends Enter {
    public static JavadocEnter instance0(Context context) {
        Enter instance = context.get(enterKey);
        if (instance == null)
            instance = new JavadocEnter(context);
        return (JavadocEnter)instance;
    }

    public static void preRegister(Context context) {
        context.put(enterKey, new Context.Factory<Enter>() {
               public Enter make(Context c) {
                   return new JavadocEnter(c);
               }
        });
    }

    protected JavadocEnter(Context context) {
        super(context);
        messager = Messager.instance0(context);
        docenv = DocEnv.instance(context);
    }

    final Messager messager;
    final DocEnv docenv;

    @Override
    public void main(List<JCCompilationUnit> trees) {
        // count all Enter errors as warnings.
        int nerrors = messager.nerrors;
        super.main(trees);
        messager.nwarnings += (messager.nerrors - nerrors);
        messager.nerrors = nerrors;
    }

    @Override
    public void visitTopLevel(JCCompilationUnit tree) {
        super.visitTopLevel(tree);
        if (tree.sourcefile.isNameCompatible("package-info", JavaFileObject.Kind.SOURCE)) {
            docenv.makePackageDoc(tree.packge, docenv.getTreePath(tree));
        }
    }

    @Override
    public void visitClassDef(JCClassDecl tree) {
        super.visitClassDef(tree);
        if (tree.sym == null) return;
        if (tree.sym.kind == Kinds.TYP || tree.sym.kind == Kinds.ERR) {
            ClassSymbol c = tree.sym;
            docenv.makeClassDoc(c, docenv.getTreePath(env.toplevel, tree));
        }
    }

    /** Don't complain about a duplicate class. */
    @Override
    protected void duplicateClass(DiagnosticPosition pos, ClassSymbol c) {}

}