content: /*
   * Copyright (c) 2022, 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
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   */
  package javac.internal.jrtfs;
  
  import java.io.IOException;
  import java.nio.file.FileStore;
  import java.nio.file.FileSystem;
  import java.nio.file.attribute.FileAttributeView;
  import java.nio.file.attribute.BasicFileAttributeView;
  import java.nio.file.attribute.FileStoreAttributeView;
  import java.util.Objects;
  
  /**
   * File store implementation for jrt file systems.
   *
   * @implNote This class needs to maintain JDK 8 source compatibility.
   *
   * It is used internally in the JDK to implement jimage/jrtfs access,
   * but also compiled and delivered as part of the jrtfs.jar to support access
   * to the jimage file provided by the shipped JDK by tools running on JDK 8.
   */
  final class JrtFileStore extends FileStore {
  
      protected final FileSystem jrtfs;
  
      JrtFileStore(JrtPath jrtPath) {
          this.jrtfs = jrtPath.getFileSystem();
      }
  
      @Override
      public String name() {
          return jrtfs.toString() + "/";
      }
  
      @Override
      public String type() {
          return "jrtfs";
      }
  
      @Override
      public boolean isReadOnly() {
          return jrtfs.isReadOnly();
      }
  
      @Override
      public boolean supportsFileAttributeView(String name) {
          return name.equals("basic") || name.equals("jrt");
      }
  
      @Override
      @SuppressWarnings("unchecked")
      public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) {
          Objects.requireNonNull(type, "type");
          return (V) null;
      }
  
      @Override
      public long getTotalSpace() throws IOException {
          throw new UnsupportedOperationException("getTotalSpace");
      }
  
      @Override
      public long getUsableSpace() throws IOException {
          throw new UnsupportedOperationException("getUsableSpace");
      }
  
      @Override
      public long getUnallocatedSpace() throws IOException {
          throw new UnsupportedOperationException("getUnallocatedSpace");
      }
  
      @Override
      public Object getAttribute(String attribute) throws IOException {
          throw new UnsupportedOperationException("does not support " + attribute);
      }
  
      @Override
      public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) {
          return type == BasicFileAttributeView.class ||
                 type == JrtFileAttributeView.class;
      }
  }
  