/*

 * Copyright 2001-2006 Sun Microsystems, Inc.  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.  Sun designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package com.sun.tools.javadoc;

import com.sun.tools.javac.code.Symbol.PackageSymbol;

import com.sun.tools.javac.jvm.ClassReader;

import com.sun.tools.javac.util.Context;

import java.io.File;

import java.util.EnumSet;

import javax.tools.JavaFileObject;

/** Javadoc uses an extended class reader that records package.html entries

 *  @author Neal Gafter

 */

class JavadocClassReader extends ClassReader {

    public static JavadocClassReader instance0(Context context) {

        ClassReader instance = context.get(classReaderKey);

        if (instance == null)

            instance = new JavadocClassReader(context);

        return (JavadocClassReader)instance;

    }

    public static void preRegister(final Context context) {

        context.put(classReaderKey, new Context.Factory<ClassReader>() {

            public ClassReader make() {

                return new JavadocClassReader(context);

            }

        });

    }

    private DocEnv docenv;

    private EnumSet<JavaFileObject.Kind> all = EnumSet.of(JavaFileObject.Kind.CLASS,

                                                          JavaFileObject.Kind.SOURCE,

                                                          JavaFileObject.Kind.HTML);

    private EnumSet<JavaFileObject.Kind> noSource = EnumSet.of(JavaFileObject.Kind.CLASS,

                                                               JavaFileObject.Kind.HTML);

    private JavadocClassReader(Context context) {

        super(context, true);

        docenv = DocEnv.instance(context);

    }

    /**

     * Override getPackageFileKinds to include search for package.html

     */

    @Override

    protected EnumSet<JavaFileObject.Kind> getPackageFileKinds() {

        return docenv.docClasses ? noSource : all;

    }

    /**

     * Override extraFileActions to check for package documentation

     */

    @Override

    protected void extraFileActions(PackageSymbol pack, JavaFileObject fo) {

        CharSequence fileName = Old199.getName(fo);

        if (docenv != null && fileName.equals("package.html")) {

            if (fo instanceof JavacFileManager.ZipFileObject) {

                JavacFileManager.ZipFileObject zfo = (JavacFileManager.ZipFileObject) fo;

                String zipName = zfo.getZipName();

                String entryName = zfo.getZipEntryName();

                int lastSep = entryName.lastIndexOf("/");

                String classPathName = entryName.substring(0, lastSep + 1);

                docenv.getPackageDoc(pack).setDocPath(zipName, classPathName);

            }

            else if (fo instanceof JavacFileManager.ZipFileIndexFileObject) {

                JavacFileManager.ZipFileIndexFileObject zfo = (JavacFileManager.ZipFileIndexFileObject) fo;

                String zipName = zfo.getZipName();

                String entryName = zfo.getZipEntryName();

                if (File.separatorChar != '/') {

                    entryName = entryName.replace(File.separatorChar, '/');

                }

                int lastSep = entryName.lastIndexOf("/");

                String classPathName = entryName.substring(0, lastSep + 1);

                docenv.getPackageDoc(pack).setDocPath(zipName, classPathName);

            }

            else {

                File fileDir = new File(Old199.getPath(fo)).getParentFile();

                docenv.getPackageDoc(pack).setDocPath(fileDir.getAbsolutePath());

            }

        }

    }

}