content: /*
   * Copyright (c) 2012, 2016, Oracle and/or its affiliates. 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.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package openjdk.tools.sjavac.comp;
  
  import java.io.*;
  import java.net.URI;
  import java.nio.file.NoSuchFileException;
  
  import jdkx.lang.model.element.Modifier;
  import jdkx.lang.model.element.NestingKind;
  import jdkx.tools.JavaFileObject;
  
  import openjdk.tools.javac.util.DefinedBy;
  import openjdk.tools.javac.util.DefinedBy.Api;
  
  /**
   * The SmartFileObject will return an outputstream that cache the written data
   * and compare the new content with the old content on disk. Only if they differ,
   * will the file be updated.
   *
   *  <p><b>This is NOT part of any supported API.
   *  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>
   */
  public class SmartFileObject implements JavaFileObject {
  
      JavaFileObject file;
  
      public SmartFileObject(JavaFileObject r) {
          file = r;
      }
  
      @Override
      public boolean equals(Object other) {
          return file.equals(other);
      }
  
      @Override
      public int hashCode() {
          return file.hashCode();
      }
  
      @DefinedBy(Api.COMPILER)
      public Kind getKind() {
          return file.getKind();
      }
  
      @DefinedBy(Api.COMPILER)
      public boolean isNameCompatible(String simpleName, Kind kind) {
          return file.isNameCompatible(simpleName, kind);
      }
  
      @DefinedBy(Api.COMPILER)
      public URI toUri() {
          return file.toUri();
      }
  
      @DefinedBy(Api.COMPILER)
      public String getName() {
          return file.getName();
      }
  
      @DefinedBy(Api.COMPILER)
      public InputStream openInputStream() throws IOException {
          return file.openInputStream();
      }
  
      @DefinedBy(Api.COMPILER)
      public OutputStream openOutputStream() throws IOException {
          return file.openOutputStream();
      }
  
      @DefinedBy(Api.COMPILER)
      public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
          return file.getCharContent(ignoreEncodingErrors);
      }
  
      static String lineseparator = System.getProperty("line.separator");
  
      @DefinedBy(Api.COMPILER)
      public Writer openWriter() throws IOException {
          StringBuilder s = new StringBuilder();
          try (BufferedReader r = new BufferedReader(file.openReader(true))) {
              while (r.ready()) {
                  s.append(r.readLine()+lineseparator);
              }
          } catch (FileNotFoundException | NoSuchFileException e) {
              // Perfectly ok.
          }
          return new SmartWriter(file, s.toString(), file.getName());
      }
  
      @DefinedBy(Api.COMPILER)
      public long getLastModified() {
          return file.getLastModified();
      }
  
      @DefinedBy(Api.COMPILER)
      public boolean delete() {
          return file.delete();
      }
  
      @DefinedBy(Api.COMPILER)
      public Modifier getAccessLevel() {
          return file.getAccessLevel();
      }
  
      @DefinedBy(Api.COMPILER)
      public NestingKind getNestingKind() {
          return file.getNestingKind();
      }
  
      @DefinedBy(Api.COMPILER)
      public Reader openReader(boolean ignoreEncodingErrors) throws IOException {
          return file.openReader(ignoreEncodingErrors);
      }
  
  }
  