jdk8-mips64-public/langtools: src/share/classes/com/sun/tools/javac/file/RegularFileObject.java@85fecace920b (annotated)

src/share/classes/com/sun/tools/javac/file/RegularFileObject.java@85fecace920b (annotated)

src/share/classes/com/sun/tools/javac/file/RegularFileObject.java

Thu, 30 Jul 2009 10:29:53 +0100

author: mcimadamore
date: Thu, 30 Jul 2009 10:29:53 +0100
changeset 341: 85fecace920b
parent 333: 7c2d6da61646
child 400: 35e29f51a7c3
permissions: -rw-r--r--

6827648: Extremely slow compilation time for visitor pattern code + generics
Summary: Javac unnecessarily recomputates type-substitutions multiple times
Reviewed-by: jjg

 /*
  * Copyright 2005-2008 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 com.sun.tools.javac.file;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.OutputStreamWriter;
 import java.io.Writer;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.nio.ByteBuffer;
 import java.nio.CharBuffer;
 import java.nio.charset.CharsetDecoder;
 import javax.tools.JavaFileObject;
 /**
  * A subclass of JavaFileObject representing regular files.
  *
  * <p><b>This is NOT part of any API supported by Sun Microsystems.
  * If you write code that depends on this, you do so at your own risk.
  * This code and its internal interfaces are subject to change or
  * deletion without notice.</b>
  */
 class RegularFileObject extends BaseFileObject {
     /** Have the parent directories been created?
      */
     private boolean hasParents = false;
     private String name;
     final File f;
     public RegularFileObject(JavacFileManager fileManager, File f) {
         this(fileManager, f.getName(), f);
     }
     public RegularFileObject(JavacFileManager fileManager, String name, File f) {
         super(fileManager);
         if (f.isDirectory()) {
             throw new IllegalArgumentException("directories not supported");
         }
         this.name = name;
         this.f = f;
     }
     public InputStream openInputStream() throws IOException {
         return new FileInputStream(f);
     }
     protected CharsetDecoder getDecoder(boolean ignoreEncodingErrors) {
         return fileManager.getDecoder(fileManager.getEncodingName(), ignoreEncodingErrors);
     }
     public OutputStream openOutputStream() throws IOException {
         ensureParentDirectoriesExist();
         return new FileOutputStream(f);
     }
     public Writer openWriter() throws IOException {
         ensureParentDirectoriesExist();
         return new OutputStreamWriter(new FileOutputStream(f), fileManager.getEncodingName());
     }
     @Override
     protected String inferBinaryName(Iterable<? extends File> path) {
         String fPath = f.getPath();
         //System.err.println("RegularFileObject " + file + " " +r.getPath());
         for (File dir: path) {
             //System.err.println("dir: " + dir);
             String dPath = dir.getPath();
             if (dPath.length() == 0)
                 dPath = System.getProperty("user.dir");
             if (!dPath.endsWith(File.separator))
                 dPath += File.separator;
             if (fPath.regionMatches(true, 0, dPath, 0, dPath.length())
                 && new File(fPath.substring(0, dPath.length())).equals(new File(dPath))) {
                 String relativeName = fPath.substring(dPath.length());
                 return removeExtension(relativeName).replace(File.separatorChar, '.');
             }
         }
         return null;
     }
     private void ensureParentDirectoriesExist() throws IOException {
         if (!hasParents) {
             File parent = f.getParentFile();
             if (parent != null && !parent.exists()) {
                 if (!parent.mkdirs()) {
                     if (!parent.exists() || !parent.isDirectory()) {
                         throw new IOException("could not create parent directories");
                     }
                 }
             }
             hasParents = true;
         }
     }
     @Deprecated
     public String getName() {
         return name;
     }
     public boolean isNameCompatible(String cn, JavaFileObject.Kind kind) {
         cn.getClass();
         // null check
         if (kind == Kind.OTHER && getKind() != kind) {
             return false;
         }
         String n = cn + kind.extension;
         if (name.equals(n)) {
             return true;
         }
         if (name.equalsIgnoreCase(n)) {
             try {
                 // allow for Windows
                 return f.getCanonicalFile().getName().equals(n);
             } catch (IOException e) {
             }
         }
         return false;
     }
     @Deprecated
     public String getPath() {
         return f.getPath();
     }
     public long getLastModified() {
         return f.lastModified();
     }
     public boolean delete() {
         return f.delete();
     }
     public CharBuffer getCharContent(boolean ignoreEncodingErrors) throws IOException {
         CharBuffer cb = fileManager.getCachedContent(this);
         if (cb == null) {
             InputStream in = new FileInputStream(f);
             try {
                 ByteBuffer bb = fileManager.makeByteBuffer(in);
                 JavaFileObject prev = fileManager.log.useSource(this);
                 try {
                     cb = fileManager.decode(bb, ignoreEncodingErrors);
                 } finally {
                     fileManager.log.useSource(prev);
                 }
                 fileManager.recycleByteBuffer(bb);
                 if (!ignoreEncodingErrors) {
                     fileManager.cache(this, cb);
                 }
             } finally {
                 in.close();
             }
         }
         return cb;
     }
     @Override
     public boolean equals(Object other) {
         if (!(other instanceof RegularFileObject)) {
             return false;
         }
         RegularFileObject o = (RegularFileObject) other;
         try {
             return f.equals(o.f) || f.getCanonicalFile().equals(o.f.getCanonicalFile());
         } catch (IOException e) {
             return false;
         }
     }
     @Override
     public int hashCode() {
         return f.hashCode();
     }
     public URI toUri() {
         try {
             String path = f.getAbsolutePath().replace(File.separatorChar, '/');
             return new URI("file://" + path).normalize();
         } catch (URISyntaxException ex) {
             return f.toURI();
         }
     }
 }

Mercurial > jdk8-mips64-public > langtools / annotate

src/share/classes/com/sun/tools/javac/file/RegularFileObject.java@85fecace920b (annotated)

src/share/classes/com/sun/tools/javac/file/RegularFileObject.java