/*
 * Copyright (c) 2001, 2017, 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 jdk.javadoc.internal.tool;

import javax.tools.JavaFileObject;

import com.sun.source.util.TreePath;
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;

import static com.sun.tools.javac.code.Kinds.Kind.*;
import com.sun.tools.javac.main.JavaCompiler;

 Javadoc's own enter phase does a few things above and beyond that
 done by javac.
 
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.
 @author Neal Gafter
/**
 *  Javadoc's own enter phase does a few things above and beyond that
 *  done by javac.
 *
 *  <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>
 *
 *  @author Neal Gafter
 */
public class JavadocEnter extends Enter {
    public static JavadocEnter instance(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, (Context.Factory<Enter>)JavadocEnter::new);
    }

    protected JavadocEnter(Context context) {
        super(context);
        messager = Messager.instance0(context);
        toolEnv = ToolEnvironment.instance(context);
        compiler = JavaCompiler.instance(context);
    }

    final Messager messager;
    final ToolEnvironment toolEnv;
    final JavaCompiler compiler;

    @Override
    public void main(List<JCCompilationUnit> trees) {
        // cache the error count if we need to convert Enter errors as warnings.
        int nerrors = messager.nerrors;
        super.main(trees);
        compiler.enterDone();
        if (toolEnv.ignoreSourceErrors) {
            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)) {
            JCPackageDecl pd = tree.getPackage();
            TreePath tp = pd == null ? toolEnv.getTreePath(tree) : toolEnv.getTreePath(tree, pd);
            toolEnv.setElementToTreePath(tree.packge, tp);
        }
    }

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

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

}