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/*
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* Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package jdk.internal.jrtfs;
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import java.io.IOException;
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import java.nio.file.FileStore;
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import java.nio.file.FileSystem;
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import java.nio.file.attribute.FileAttributeView;
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import java.nio.file.attribute.BasicFileAttributeView;
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import java.nio.file.attribute.FileStoreAttributeView;
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import java.util.Objects;
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/**
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* File store implementation for jrt file systems.
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*
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* @implNote This class needs to maintain JDK 8 source compatibility.
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*
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* It is used internally in the JDK to implement jimage/jrtfs access,
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* but also compiled and delivered as part of the jrtfs.jar to support access
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* to the jimage file provided by the shipped JDK by tools running on JDK 8.
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*/
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final class JrtFileStore extends FileStore {
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protected final FileSystem jrtfs;
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JrtFileStore(JrtPath jrtPath) {
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this.jrtfs = jrtPath.getFileSystem();
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}
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@Override
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public String name() {
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return jrtfs.toString() + "/";
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}
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@Override
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public String type() {
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return "jrtfs";
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}
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@Override
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public boolean isReadOnly() {
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return jrtfs.isReadOnly();
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}
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@Override
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public boolean supportsFileAttributeView(String name) {
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return name.equals("basic") || name.equals("jrt");
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}
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@Override
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@SuppressWarnings("unchecked")
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public <V extends FileStoreAttributeView> V getFileStoreAttributeView(Class<V> type) {
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Objects.requireNonNull(type, "type");
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return (V) null;
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}
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@Override
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public long getTotalSpace() throws IOException {
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throw new UnsupportedOperationException("getTotalSpace");
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}
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@Override
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public long getUsableSpace() throws IOException {
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throw new UnsupportedOperationException("getUsableSpace");
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}
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@Override
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public long getUnallocatedSpace() throws IOException {
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throw new UnsupportedOperationException("getUnallocatedSpace");
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}
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@Override
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public Object getAttribute(String attribute) throws IOException {
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throw new UnsupportedOperationException("does not support " + attribute);
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}
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@Override
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public boolean supportsFileAttributeView(Class<? extends FileAttributeView> type) {
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return type == BasicFileAttributeView.class ||
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type == JrtFileAttributeView.class;
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}
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}
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