1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/classes/com/sun/tools/javac/nio/PathFileObject.java Fri Dec 11 14:26:27 2009 -0800
1.3 @@ -0,0 +1,319 @@
1.4 +/*
1.5 + * Copyright 2009 Sun Microsystems, Inc. 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. Sun designates this
1.11 + * particular file as subject to the "Classpath" exception as provided
1.12 + * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
1.25 + * CA 95054 USA or visit www.sun.com if you need additional information or
1.26 + * have any questions.
1.27 + */
1.28 +
1.29 +package com.sun.tools.javac.nio;
1.30 +
1.31 +import java.io.IOException;
1.32 +import java.io.InputStream;
1.33 +import java.io.InputStreamReader;
1.34 +import java.io.OutputStream;
1.35 +import java.io.OutputStreamWriter;
1.36 +import java.io.Reader;
1.37 +import java.io.Writer;
1.38 +import java.net.URI;
1.39 +import java.nio.ByteBuffer;
1.40 +import java.nio.CharBuffer;
1.41 +import java.nio.charset.CharsetDecoder;
1.42 +import java.nio.file.Files;
1.43 +import java.nio.file.Path;
1.44 +import java.nio.file.attribute.Attributes;
1.45 +import java.nio.file.attribute.BasicFileAttributes;
1.46 +import javax.lang.model.element.Modifier;
1.47 +import javax.lang.model.element.NestingKind;
1.48 +import javax.tools.JavaFileObject;
1.49 +
1.50 +import com.sun.tools.javac.util.BaseFileManager;
1.51 +
1.52 +
1.53 +/**
1.54 + * Implementation of JavaFileObject using java.nio.file API.
1.55 + *
1.56 + * <p>PathFileObjects are, for the most part, straightforward wrappers around
1.57 + * Path objects. The primary complexity is the support for "inferBinaryName".
1.58 + * This is left as an abstract method, implemented by each of a number of
1.59 + * different factory methods, which compute the binary name based on
1.60 + * information available at the time the file object is created.
1.61 + *
1.62 + * <p><b>This is NOT part of any API supported by Sun Microsystems. If
1.63 + * you write code that depends on this, you do so at your own risk.
1.64 + * This code and its internal interfaces are subject to change or
1.65 + * deletion without notice.</b>
1.66 + */
1.67 +abstract class PathFileObject implements JavaFileObject {
1.68 + private JavacPathFileManager fileManager;
1.69 + private Path path;
1.70 +
1.71 + /**
1.72 + * Create a PathFileObject within a directory, such that the binary name
1.73 + * can be inferred from the relationship to the parent directory.
1.74 + */
1.75 + static PathFileObject createDirectoryPathFileObject(JavacPathFileManager fileManager,
1.76 + final Path path, final Path dir) {
1.77 + return new PathFileObject(fileManager, path) {
1.78 + @Override
1.79 + String inferBinaryName(Iterable<? extends Path> paths) {
1.80 + return toBinaryName(dir.relativize(path));
1.81 + }
1.82 + };
1.83 + }
1.84 +
1.85 + /**
1.86 + * Create a PathFileObject in a file system such as a jar file, such that
1.87 + * the binary name can be inferred from its position within the filesystem.
1.88 + */
1.89 + static PathFileObject createJarPathFileObject(JavacPathFileManager fileManager,
1.90 + final Path path) {
1.91 + return new PathFileObject(fileManager, path) {
1.92 + @Override
1.93 + String inferBinaryName(Iterable<? extends Path> paths) {
1.94 + return toBinaryName(path);
1.95 + }
1.96 + };
1.97 + }
1.98 +
1.99 + /**
1.100 + * Create a PathFileObject whose binary name can be inferred from the
1.101 + * relative path to a sibling.
1.102 + */
1.103 + static PathFileObject createSiblingPathFileObject(JavacPathFileManager fileManager,
1.104 + final Path path, final String relativePath) {
1.105 + return new PathFileObject(fileManager, path) {
1.106 + @Override
1.107 + String inferBinaryName(Iterable<? extends Path> paths) {
1.108 + return toBinaryName(relativePath, "/");
1.109 + }
1.110 + };
1.111 + }
1.112 +
1.113 + /**
1.114 + * Create a PathFileObject whose binary name might be inferred from its
1.115 + * position on a search path.
1.116 + */
1.117 + static PathFileObject createSimplePathFileObject(JavacPathFileManager fileManager,
1.118 + final Path path) {
1.119 + return new PathFileObject(fileManager, path) {
1.120 + @Override
1.121 + String inferBinaryName(Iterable<? extends Path> paths) {
1.122 + Path absPath = path.toAbsolutePath();
1.123 + for (Path p: paths) {
1.124 + Path ap = p.toAbsolutePath();
1.125 + if (absPath.startsWith(ap)) {
1.126 + try {
1.127 + Path rp = ap.relativize(absPath);
1.128 + if (rp != null) // maybe null if absPath same as ap
1.129 + return toBinaryName(rp);
1.130 + } catch (IllegalArgumentException e) {
1.131 + // ignore this p if cannot relativize path to p
1.132 + }
1.133 + }
1.134 + }
1.135 + return null;
1.136 + }
1.137 + };
1.138 + }
1.139 +
1.140 + protected PathFileObject(JavacPathFileManager fileManager, Path path) {
1.141 + fileManager.getClass(); // null check
1.142 + path.getClass(); // null check
1.143 + this.fileManager = fileManager;
1.144 + this.path = path;
1.145 + }
1.146 +
1.147 + abstract String inferBinaryName(Iterable<? extends Path> paths);
1.148 +
1.149 + /**
1.150 + * Return the Path for this object.
1.151 + * @return the Path for this object.
1.152 + */
1.153 + Path getPath() {
1.154 + return path;
1.155 + }
1.156 +
1.157 + @Override
1.158 + public Kind getKind() {
1.159 + return BaseFileManager.getKind(path.getName().toString());
1.160 + }
1.161 +
1.162 + @Override
1.163 + public boolean isNameCompatible(String simpleName, Kind kind) {
1.164 + simpleName.getClass();
1.165 + // null check
1.166 + if (kind == Kind.OTHER && getKind() != kind) {
1.167 + return false;
1.168 + }
1.169 + String sn = simpleName + kind.extension;
1.170 + String pn = path.getName().toString();
1.171 + if (pn.equals(sn)) {
1.172 + return true;
1.173 + }
1.174 + if (pn.equalsIgnoreCase(sn)) {
1.175 + try {
1.176 + // allow for Windows
1.177 + return path.toRealPath(false).getName().toString().equals(sn);
1.178 + } catch (IOException e) {
1.179 + }
1.180 + }
1.181 + return false;
1.182 + }
1.183 +
1.184 + @Override
1.185 + public NestingKind getNestingKind() {
1.186 + return null;
1.187 + }
1.188 +
1.189 + @Override
1.190 + public Modifier getAccessLevel() {
1.191 + return null;
1.192 + }
1.193 +
1.194 + @Override
1.195 + public URI toUri() {
1.196 + return path.toUri();
1.197 + }
1.198 +
1.199 + @Override
1.200 + public String getName() {
1.201 + return path.toString();
1.202 + }
1.203 +
1.204 + @Override
1.205 + public InputStream openInputStream() throws IOException {
1.206 + return path.newInputStream();
1.207 + }
1.208 +
1.209 + @Override
1.210 + public OutputStream openOutputStream() throws IOException {
1.211 + ensureParentDirectoriesExist();
1.212 + return path.newOutputStream();
1.213 + }
1.214 +
1.215 + @Override
1.216 + public Reader openReader(boolean ignoreEncodingErrors) throws IOException {
1.217 + CharsetDecoder decoder = fileManager.getDecoder(fileManager.getEncodingName(), ignoreEncodingErrors);
1.218 + return new InputStreamReader(openInputStream(), decoder);
1.219 + }
1.220 +
1.221 + @Override
1.222 + public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
1.223 + CharBuffer cb = fileManager.getCachedContent(this);
1.224 + if (cb == null) {
1.225 + InputStream in = openInputStream();
1.226 + try {
1.227 + ByteBuffer bb = fileManager.makeByteBuffer(in);
1.228 + JavaFileObject prev = fileManager.log.useSource(this);
1.229 + try {
1.230 + cb = fileManager.decode(bb, ignoreEncodingErrors);
1.231 + } finally {
1.232 + fileManager.log.useSource(prev);
1.233 + }
1.234 + fileManager.recycleByteBuffer(bb);
1.235 + if (!ignoreEncodingErrors) {
1.236 + fileManager.cache(this, cb);
1.237 + }
1.238 + } finally {
1.239 + in.close();
1.240 + }
1.241 + }
1.242 + return cb;
1.243 + }
1.244 +
1.245 + @Override
1.246 + public Writer openWriter() throws IOException {
1.247 + ensureParentDirectoriesExist();
1.248 + return new OutputStreamWriter(path.newOutputStream(), fileManager.getEncodingName());
1.249 + }
1.250 +
1.251 + @Override
1.252 + public long getLastModified() {
1.253 + try {
1.254 + BasicFileAttributes attrs = Attributes.readBasicFileAttributes(path);
1.255 + return attrs.lastModifiedTime().toMillis();
1.256 + } catch (IOException e) {
1.257 + return -1;
1.258 + }
1.259 + }
1.260 +
1.261 + @Override
1.262 + public boolean delete() {
1.263 + try {
1.264 + path.delete();
1.265 + return true;
1.266 + } catch (IOException e) {
1.267 + return false;
1.268 + }
1.269 + }
1.270 +
1.271 + public boolean isSameFile(PathFileObject other) {
1.272 + try {
1.273 + return path.isSameFile(other.path);
1.274 + } catch (IOException e) {
1.275 + return false;
1.276 + }
1.277 + }
1.278 +
1.279 + @Override
1.280 + public boolean equals(Object other) {
1.281 + return (other instanceof PathFileObject && path.equals(((PathFileObject) other).path));
1.282 + }
1.283 +
1.284 + @Override
1.285 + public int hashCode() {
1.286 + return path.hashCode();
1.287 + }
1.288 +
1.289 + @Override
1.290 + public String toString() {
1.291 + return getClass().getSimpleName() + "[" + path + "]";
1.292 + }
1.293 +
1.294 + private void ensureParentDirectoriesExist() throws IOException {
1.295 + Path parent = path.getParent();
1.296 + if (parent != null)
1.297 + Files.createDirectories(parent);
1.298 + }
1.299 +
1.300 + private long size() {
1.301 + try {
1.302 + BasicFileAttributes attrs = Attributes.readBasicFileAttributes(path);
1.303 + return attrs.size();
1.304 + } catch (IOException e) {
1.305 + return -1;
1.306 + }
1.307 + }
1.308 +
1.309 + protected static String toBinaryName(Path relativePath) {
1.310 + return toBinaryName(relativePath.toString(),
1.311 + relativePath.getFileSystem().getSeparator());
1.312 + }
1.313 +
1.314 + protected static String toBinaryName(String relativePath, String sep) {
1.315 + return removeExtension(relativePath).replaceAll(sep, ".");
1.316 + }
1.317 +
1.318 + protected static String removeExtension(String fileName) {
1.319 + int lastDot = fileName.lastIndexOf(".");
1.320 + return (lastDot == -1 ? fileName : fileName.substring(0, lastDot));
1.321 + }
1.322 +}
