/*

 * Copyright 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 javax.tools;

import java.io.File;

import java.io.IOException;

import java.util.*;

import java.util.concurrent.*;

/**

 * File manager based on {@linkplain File java.io.File}.  A common way

 * to obtain an instance of this class is using {@linkplain

 * JavaCompiler#getStandardFileManager

 * getStandardFileManager}, for example:

 *

 * <pre>

 *   JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

 *   {@code DiagnosticCollector<JavaFileObject>} diagnostics =

 *       new {@code DiagnosticCollector<JavaFileObject>()};

 *   StandardJavaFileManager fm = compiler.getStandardFileManager(diagnostics, null, null);

 * </pre>

 *

 * This file manager creates file objects representing regular

 * {@linkplain File files},

 * {@linkplain java.util.zip.ZipEntry zip file entries}, or entries in

 * similar file system based containers.  Any file object returned

 * from a file manager implementing this interface must observe the

 * following behavior:

 *

 * <ul>

 *   <li>

 *     File names need not be canonical.

 *   </li>

 *   <li>

 *     For file objects representing regular files

 *     <ul>

 *       <li>

 *         the method <code>{@linkplain FileObject#delete()}</code>

 *         is equivalent to <code>{@linkplain File#delete()}</code>,

 *       </li>

 *       <li>

 *         the method <code>{@linkplain FileObject#getLastModified()}</code>

 *         is equivalent to <code>{@linkplain File#lastModified()}</code>,

 *       </li>

 *       <li>

 *         the methods <code>{@linkplain FileObject#getCharContent(boolean)}</code>,

 *         <code>{@linkplain FileObject#openInputStream()}</code>, and

 *         <code>{@linkplain FileObject#openReader(boolean)}</code>

 *         must succeed if the following would succeed (ignoring

 *         encoding issues):

 *         <blockquote>

 *           <pre>new {@linkplain java.io.FileInputStream#FileInputStream(File) FileInputStream}(new {@linkplain File#File(java.net.URI) File}({@linkplain FileObject fileObject}.{@linkplain FileObject#toUri() toUri}()))</pre>

 *         </blockquote>

 *       </li>

 *       <li>

 *         and the methods

 *         <code>{@linkplain FileObject#openOutputStream()}</code>, and

 *         <code>{@linkplain FileObject#openWriter()}</code> must

 *         succeed if the following would succeed (ignoring encoding

 *         issues):

 *         <blockquote>

 *           <pre>new {@linkplain java.io.FileOutputStream#FileOutputStream(File) FileOutputStream}(new {@linkplain File#File(java.net.URI) File}({@linkplain FileObject fileObject}.{@linkplain FileObject#toUri() toUri}()))</pre>

 *         </blockquote>

 *       </li>

 *     </ul>

 *   </li>

 *   <li>

 *     The {@linkplain java.net.URI URI} returned from

 *     <code>{@linkplain FileObject#toUri()}</code>

 *     <ul>

 *       <li>

 *         must be {@linkplain java.net.URI#isAbsolute() absolute} (have a schema), and

 *       </li>

 *       <li>

 *         must have a {@linkplain java.net.URI#normalize() normalized}

 *         {@linkplain java.net.URI#getPath() path component} which

 *         can be resolved without any process-specific context such

 *         as the current directory (file names must be absolute).

 *       </li>

 *     </ul>

 *   </li>

 * </ul>

 *

 * According to these rules, the following URIs, for example, are

 * allowed:

 * <ul>

 *   <li>

 *     <code>file:///C:/Documents%20and%20Settings/UncleBob/BobsApp/Test.java</code>

 *   </li>

 *   <li>

 *     <code>jar:///C:/Documents%20and%20Settings/UncleBob/lib/vendorA.jar!com/vendora/LibraryClass.class</code>

 *   </li>

 * </ul>

 * Whereas these are not (reason in parentheses):

 * <ul>

 *   <li>

 *     <code>file:BobsApp/Test.java</code> (the file name is relative

 *     and depend on the current directory)

 *   </li>

 *   <li>

 *     <code>jar:lib/vendorA.jar!com/vendora/LibraryClass.class</code>

 *     (the first half of the path depends on the current directory,

 *     whereas the component after ! is legal)

 *   </li>

 *   <li>

 *     <code>Test.java</code> (this URI depends on the current

 *     directory and does not have a schema)

 *   </li>

 *   <li>

 *     <code>jar:///C:/Documents%20and%20Settings/UncleBob/BobsApp/../lib/vendorA.jar!com/vendora/LibraryClass.class</code>

 *     (the path is not normalized)

 *   </li>

 * </ul>

 *

 * @author Peter von der Ahé

 * @since 1.6

 */

public interface StandardJavaFileManager extends JavaFileManager {

    /**

     * Compares two file objects and return true if they represent the

     * same canonical file, zip file entry, or entry in any file

     * system based container.

     *

     * @param a a file object

     * @param b a file object

     * @return true if the given file objects represent the same

     * canonical file or zip file entry; false otherwise

     *

     * @throws IllegalArgumentException if either of the arguments

     * were created with another file manager implementation

     */

    boolean isSameFile(FileObject a, FileObject b);

    /**

     * Gets file objects representing the given files.

     *

     * @param files a list of files

     * @return a list of file objects

     * @throws IllegalArgumentException if the list of files includes

     * a directory

     */

    Iterable<? extends JavaFileObject> getJavaFileObjectsFromFiles(

        Iterable<? extends File> files);

    /**

     * Gets file objects representing the given files.

     * Convenience method equivalent to:

     *

     * <pre>

     *     getJavaFileObjectsFromFiles({@linkplain java.util.Arrays#asList Arrays.asList}(files))

     * </pre>

     *

     * @param files an array of files

     * @return a list of file objects

     * @throws IllegalArgumentException if the array of files includes

     * a directory

     * @throws NullPointerException if the given array contains null

     * elements

     */

    Iterable<? extends JavaFileObject> getJavaFileObjects(File... files);

    /**

     * Gets file objects representing the given file names.

     *

     * @param names a list of file names

     * @return a list of file objects

     * @throws IllegalArgumentException if the list of file names

     * includes a directory

     */

    Iterable<? extends JavaFileObject> getJavaFileObjectsFromStrings(

        Iterable<String> names);

    /**

     * Gets file objects representing the given file names.

     * Convenience method equivalent to:

     *

     * <pre>

     *     getJavaFileObjectsFromStrings({@linkplain java.util.Arrays#asList Arrays.asList}(names))

     * </pre>

     *

     * @param names a list of file names

     * @return a list of file objects

     * @throws IllegalArgumentException if the array of file names

     * includes a directory

     * @throws NullPointerException if the given array contains null

     * elements

     */

    Iterable<? extends JavaFileObject> getJavaFileObjects(String... names);

    /**

     * Associates the given path with the given location.  Any

     * previous value will be discarded.

     *

     * @param location a location

     * @param path a list of files, if {@code null} use the default

     * path for this location

     * @see #getLocation

     * @throws IllegalArgumentException if location is an output

     * location and path does not contain exactly one element

     * @throws IOException if location is an output location and path

     * does not represent an existing directory

     */

    void setLocation(Location location, Iterable<? extends File> path)

        throws IOException;

    /**

     * Gets the path associated with the given location.

     *

     * @param location a location

     * @return a list of files or {@code null} if this location has no

     * associated path

     * @see #setLocation

     */

    Iterable<? extends File> getLocation(Location location);

}