1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/classes/com/sun/tools/sjavac/comp/SmartFileObject.java Mon Feb 04 18:08:53 2013 -0500
1.3 @@ -0,0 +1,126 @@
1.4 +/*
1.5 + * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation. Oracle designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Oracle in the LICENSE file that accompanied this code.
1.13 + *
1.14 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.15 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.16 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.17 + * version 2 for more details (a copy is included in the LICENSE file that
1.18 + * accompanied this code).
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License version
1.21 + * 2 along with this work; if not, write to the Free Software Foundation,
1.22 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.23 + *
1.24 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.25 + * or visit www.oracle.com if you need additional information or have any
1.26 + * questions.
1.27 + */
1.28 +
1.29 +package com.sun.tools.sjavac.comp;
1.30 +
1.31 +import java.io.*;
1.32 +import java.net.URI;
1.33 +import javax.lang.model.element.Modifier;
1.34 +import javax.lang.model.element.NestingKind;
1.35 +import javax.tools.JavaFileObject;
1.36 +
1.37 +/**
1.38 + * The SmartFileObject will return an outputstream that cache the written data
1.39 + * and compare the new content with the old content on disk. Only if they differ,
1.40 + * will the file be updated.
1.41 + *
1.42 + * <p><b>This is NOT part of any supported API.
1.43 + * If you write code that depends on this, you do so at your own
1.44 + * risk. This code and its internal interfaces are subject to change
1.45 + * or deletion without notice.</b></p>
1.46 + */
1.47 +public class SmartFileObject implements JavaFileObject {
1.48 +
1.49 + JavaFileObject file;
1.50 + PrintWriter stdout;
1.51 +
1.52 + public SmartFileObject(JavaFileObject r, PrintWriter pw) {
1.53 + file = r;
1.54 + stdout = pw;
1.55 + }
1.56 +
1.57 + @Override
1.58 + public boolean equals(Object other) {
1.59 + return file.equals(other);
1.60 + }
1.61 +
1.62 + @Override
1.63 + public int hashCode() {
1.64 + return file.hashCode();
1.65 + }
1.66 +
1.67 + public Kind getKind() {
1.68 + return file.getKind();
1.69 + }
1.70 +
1.71 + public boolean isNameCompatible(String simpleName, Kind kind) {
1.72 + return file.isNameCompatible(simpleName, kind);
1.73 + }
1.74 +
1.75 + public URI toUri() {
1.76 + return file.toUri();
1.77 + }
1.78 +
1.79 + public String getName() {
1.80 + return file.getName();
1.81 + }
1.82 +
1.83 + public InputStream openInputStream() throws IOException {
1.84 + return file.openInputStream();
1.85 + }
1.86 +
1.87 + public OutputStream openOutputStream() throws IOException {
1.88 + return file.openOutputStream();
1.89 + }
1.90 +
1.91 + public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
1.92 + return file.getCharContent(ignoreEncodingErrors);
1.93 + }
1.94 +
1.95 + static String lineseparator = System.getProperty("line.separator");
1.96 +
1.97 + public Writer openWriter() throws IOException {
1.98 + StringBuilder s = new StringBuilder();
1.99 + try (BufferedReader r = new BufferedReader(file.openReader(true))) {
1.100 + while (r.ready()) {
1.101 + s.append(r.readLine()+lineseparator);
1.102 + }
1.103 + } catch (FileNotFoundException e) {
1.104 + // Perfectly ok.
1.105 + }
1.106 + return new SmartWriter(file, s.toString(), file.getName(), stdout);
1.107 + }
1.108 +
1.109 + public long getLastModified() {
1.110 + return file.getLastModified();
1.111 + }
1.112 +
1.113 + public boolean delete() {
1.114 + return file.delete();
1.115 + }
1.116 +
1.117 + public Modifier getAccessLevel() {
1.118 + return file.getAccessLevel();
1.119 + }
1.120 +
1.121 + public NestingKind getNestingKind() {
1.122 + return file.getNestingKind();
1.123 + }
1.124 +
1.125 + public Reader openReader(boolean ignoreEncodingErrors) throws IOException {
1.126 + return file.openReader(ignoreEncodingErrors);
1.127 + }
1.128 +
1.129 +}
