jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/sjavac/comp/SmartFileObject.java@2eb010b6cb22

     1 /*

     2  * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

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

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    26 package com.sun.tools.sjavac.comp;

    28 import java.io.*;

    29 import java.net.URI;

    30 import javax.lang.model.element.Modifier;

    31 import javax.lang.model.element.NestingKind;

    32 import javax.tools.JavaFileObject;

    34 /**

    35  * The SmartFileObject will return an outputstream that cache the written data

    36  * and compare the new content with the old content on disk. Only if they differ,

    37  * will the file be updated.

    38  *

    39  * <p><b>This is NOT part of any supported API.

    40  * If you write code that depends on this, you do so at your own

    41  * risk.  This code and its internal interfaces are subject to change

    42  * or deletion without notice.</b></p>

    43  */

    44 public class SmartFileObject implements JavaFileObject {

    46     JavaFileObject file;

    47     PrintWriter stdout;

    49     public SmartFileObject(JavaFileObject r, PrintWriter pw) {

    50         file = r;

    51         stdout = pw;

    52     }

    54     @Override

    55     public boolean equals(Object other) {

    56         return file.equals(other);

    57     }

    59     @Override

    60     public int hashCode() {

    61         return file.hashCode();

    62     }

    64     public Kind getKind() {

    65         return file.getKind();

    66     }

    68     public boolean isNameCompatible(String simpleName, Kind kind) {

    69         return file.isNameCompatible(simpleName, kind);

    70     }

    72     public URI toUri() {

    73         return file.toUri();

    74     }

    76     public String getName() {

    77         return file.getName();

    78     }

    80     public InputStream openInputStream() throws IOException {

    81         return file.openInputStream();

    82     }

    84     public OutputStream openOutputStream() throws IOException {

    85         return file.openOutputStream();

    86     }

    88     public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {

    89         return file.getCharContent(ignoreEncodingErrors);

    90     }

    92     static String lineseparator = System.getProperty("line.separator");

    94     public Writer openWriter() throws IOException {

    95         StringBuilder s = new StringBuilder();

    96         try (BufferedReader r = new BufferedReader(file.openReader(true))) {

    97             while (r.ready()) {

    98                 s.append(r.readLine()+lineseparator);

    99             }

   100         } catch (FileNotFoundException e) {

   101             // Perfectly ok.

   102         }

   103         return new SmartWriter(file, s.toString(), file.getName(), stdout);

   104     }

   106     public long getLastModified() {

   107         return file.getLastModified();

   108     }

   110     public boolean delete() {

   111         return file.delete();

   112     }

   114     public Modifier getAccessLevel() {

   115         return file.getAccessLevel();

   116     }

   118     public NestingKind getNestingKind() {

   119         return file.getNestingKind();

   120     }

   122     public Reader openReader(boolean ignoreEncodingErrors) throws IOException {

   123         return file.openReader(ignoreEncodingErrors);

   124     }

   126 }

Mercurial > jdk8-mips64-public > langtools / file revision