/*

 * Copyright (c) 1995, 2004, 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 sun.tools.java;

import java.util.Enumeration;

import java.io.File;

import java.io.IOException;

/**

 * This class is used to represent the classes in a package.

 *

 * WARNING: The contents of this source file are not part of any

 * supported API.  Code that depends on them does so at its own risk:

 * they are subject to change or removal without notice.

 */

public

class Package {

    /**

     * The path which we use to locate source files.

     */

    ClassPath sourcePath;

    /**

     * The path which we use to locate class (binary) files.

     */

    ClassPath binaryPath;

    /**

     * The path name of the package.

     */

    String pkg;

    /**

     * Create a package given a class path, and package name.

     */

    public Package(ClassPath path, Identifier pkg) throws IOException {

        this(path, path, pkg);

    }

    /**

     * Create a package given a source path, binary path, and package

     * name.

     */

    public Package(ClassPath sourcePath,

                   ClassPath binaryPath,

                   Identifier pkg)

    throws IOException {

        if (pkg.isInner())

            pkg = Identifier.lookup(pkg.getQualifier(), pkg.getFlatName());

        this.sourcePath = sourcePath;

        this.binaryPath = binaryPath;

        this.pkg = pkg.toString().replace('.', File.separatorChar);

    }

    /**

     * Check if a class is defined in this package.

     * (If it is an inner class name, it is assumed to exist

     * only if its binary file exists.  This is somewhat pessimistic.)

     */

    public boolean classExists(Identifier className) {

        return getBinaryFile(className) != null ||

                !className.isInner() &&

               getSourceFile(className) != null;

    }

    /**

     * Check if the package exists

     */

    public boolean exists() {

        // Look for the directory on our binary path.

        ClassFile dir = binaryPath.getDirectory(pkg);

        if (dir != null && dir.isDirectory()) {

            return true;

        }

        if (sourcePath != binaryPath) {

            // Look for the directory on our source path.

            dir = sourcePath.getDirectory(pkg);

            if (dir != null && dir.isDirectory()) {

                return true;

            }

        }

        /* Accommodate ZIP files without CEN entries for directories

         * (packages): look on class path for at least one binary

         * file or one source file with the right package prefix

         */

        String prefix = pkg + File.separator;

        return binaryPath.getFiles(prefix, ".class").hasMoreElements()

            || sourcePath.getFiles(prefix, ".java").hasMoreElements();

    }

    private String makeName(String fileName) {

        return pkg.equals("") ? fileName : pkg + File.separator + fileName;

    }

    /**

     * Get the .class file of a class

     */

    public ClassFile getBinaryFile(Identifier className) {

        className = Type.mangleInnerType(className);

        String fileName = className.toString() + ".class";

        return binaryPath.getFile(makeName(fileName));

    }

    /**

     * Get the .java file of a class

     */

    public ClassFile getSourceFile(Identifier className) {

        // The source file of an inner class is that of its outer class.

        className = className.getTopName();

        String fileName = className.toString() + ".java";

        return sourcePath.getFile(makeName(fileName));

    }

    public ClassFile getSourceFile(String fileName) {

        if (fileName.endsWith(".java")) {

            return sourcePath.getFile(makeName(fileName));

        }

        return null;

    }

    public Enumeration getSourceFiles() {

        return sourcePath.getFiles(pkg, ".java");

    }

    public Enumeration getBinaryFiles() {

        return binaryPath.getFiles(pkg, ".class");

    }

    public String toString() {

        if (pkg.equals("")) {

            return "unnamed package";

        }

        return "package " + pkg;

    }

}