/*
 * @(#)StandardJavaFileManager.java	1.13 06/09/25
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

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>