/*
* Copyright (c) 2014, 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 jdk.internal.jrtfs;
import java.nio.file.LinkOption;
import java.nio.file.attribute.*;
import java.io.IOException;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Objects;
/**
* File attribute view for jrt file system.
*
* @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 JrtFileAttributeView implements BasicFileAttributeView {
private static enum AttrID {
size,
creationTime,
lastAccessTime,
lastModifiedTime,
isDirectory,
isRegularFile,
isSymbolicLink,
isOther,
fileKey,
compressedSize,
extension
};
private final JrtPath path;
private final boolean isJrtView;
private final LinkOption[] options;
private JrtFileAttributeView(JrtPath path, boolean isJrtView, LinkOption... options) {
this.path = path;
this.isJrtView = isJrtView;
this.options = options;
}
@SuppressWarnings("unchecked") // Cast to V
static <V extends FileAttributeView> V get(JrtPath path, Class<V> type, LinkOption... options) {
Objects.requireNonNull(type);
if (type == BasicFileAttributeView.class) {
return (V) new JrtFileAttributeView(path, false, options);
}
if (type == JrtFileAttributeView.class) {
return (V) new JrtFileAttributeView(path, true, options);
}
return null;
}
static JrtFileAttributeView get(JrtPath path, String type, LinkOption... options) {
Objects.requireNonNull(type);
if (type.equals("basic")) {
return new JrtFileAttributeView(path, false, options);
}
if (type.equals("jrt")) {
return new JrtFileAttributeView(path, true, options);
}
return null;
}
@Override
public String name() {
return isJrtView ? "jrt" : "basic";
}
@Override
public JrtFileAttributes readAttributes() throws IOException {
return path.getAttributes(options);
}
@Override
public void setTimes(FileTime lastModifiedTime,
FileTime lastAccessTime,
FileTime createTime) throws IOException {
path.setTimes(lastModifiedTime, lastAccessTime, createTime);
}
static void setAttribute(JrtPath path, String attribute, Object value)
throws IOException {
int colonPos = attribute.indexOf(':');
if (colonPos != -1) { // type = "basic", if no ":"
String type = attribute.substring(0, colonPos++);
if (!type.equals("basic") && !type.equals("jrt")) {
throw new UnsupportedOperationException(
"view <" + type + "> is not supported");
}
attribute = attribute.substring(colonPos);
}
try {
AttrID id = AttrID.valueOf(attribute);
if (id == AttrID.lastModifiedTime) {
path.setTimes((FileTime) value, null, null);
} else if (id == AttrID.lastAccessTime) {
path.setTimes(null, (FileTime) value, null);
} else if (id == AttrID.creationTime) {
path.setTimes(null, null, (FileTime) value);
}
return;
} catch (IllegalArgumentException x) {}
throw new UnsupportedOperationException("'" + attribute
+ "' is unknown or read-only attribute");
}
static Map<String, Object> readAttributes(JrtPath path, String attributes,
LinkOption... options)
throws IOException {
int colonPos = attributes.indexOf(':');
boolean isJrtView = false;
if (colonPos != -1) { // type = "basic", if no ":"
String type = attributes.substring(0, colonPos++);
if (!type.equals("basic") && !type.equals("jrt")) {
throw new UnsupportedOperationException("view <" + type +
"> is not supported");
}
isJrtView = true;
attributes = attributes.substring(colonPos);
}
JrtFileAttributes jrtfas = path.getAttributes();
LinkedHashMap<String, Object> map = new LinkedHashMap<>();
if ("*".equals(attributes)) {
for (AttrID id : AttrID.values()) {
map.put(id.name(), attribute(id, jrtfas, isJrtView));
}
} else {
String[] as = attributes.split(",");
for (String a : as) {
//throw IllegalArgumentException
map.put(a, attribute(AttrID.valueOf(a), jrtfas, isJrtView));
}
}
return map;
}
static Object attribute(AttrID id, JrtFileAttributes jrtfas, boolean isJrtView) {
switch (id) {
case size:
return jrtfas.size();
case creationTime:
return jrtfas.creationTime();
case lastAccessTime:
return jrtfas.lastAccessTime();
case lastModifiedTime:
return jrtfas.lastModifiedTime();
case isDirectory:
return jrtfas.isDirectory();
case isRegularFile:
return jrtfas.isRegularFile();
case isSymbolicLink:
return jrtfas.isSymbolicLink();
case isOther:
return jrtfas.isOther();
case fileKey:
return jrtfas.fileKey();
case compressedSize:
if (isJrtView) {
return jrtfas.compressedSize();
}
break;
case extension:
if (isJrtView) {
return jrtfas.extension();
}
break;
}
return null;
}
}