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/*
* Copyright 2013 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.common.jimfs;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import java.io.IOException;
import java.nio.file.attribute.BasicFileAttributeView;
import java.nio.file.attribute.DosFileAttributeView;
import java.nio.file.attribute.DosFileAttributes;
import java.nio.file.attribute.FileAttributeView;
import java.nio.file.attribute.FileTime;
import java.util.Map;
import org.checkerframework.checker.nullness.compatqual.NullableDecl;
/**
* Attribute provider that provides the {@link DosFileAttributeView} ("dos") and allows the reading
* of {@link DosFileAttributes}.
*
* @author Colin Decker
*/
final class DosAttributeProvider extends AttributeProvider {
private static final ImmutableSet<String> ATTRIBUTES =
ImmutableSet.of("readonly", "hidden", "archive", "system");
private static final ImmutableSet<String> INHERITED_VIEWS = ImmutableSet.of("basic", "owner");
@Override
public String name() {
return "dos";
}
@Override
public ImmutableSet<String> inherits() {
return INHERITED_VIEWS;
}
@Override
public ImmutableSet<String> fixedAttributes() {
return ATTRIBUTES;
}
@Override
public ImmutableMap<String, ?> defaultValues(Map<String, ?> userProvidedDefaults) {
return ImmutableMap.of(
"dos:readonly", getDefaultValue("dos:readonly", userProvidedDefaults),
"dos:hidden", getDefaultValue("dos:hidden", userProvidedDefaults),
"dos:archive", getDefaultValue("dos:archive", userProvidedDefaults),
"dos:system", getDefaultValue("dos:system", userProvidedDefaults));
}
private static Boolean getDefaultValue(String attribute, Map<String, ?> userProvidedDefaults) {
Object userProvidedValue = userProvidedDefaults.get(attribute);
if (userProvidedValue != null) {
return checkType("dos", attribute, userProvidedValue, Boolean.class);
}
return false;
}
@NullableDecl
@Override
public Object get(File file, String attribute) {
if (ATTRIBUTES.contains(attribute)) {
return file.getAttribute("dos", attribute);
}
return null;
}
@Override
public void set(File file, String view, String attribute, Object value, boolean create) {
if (supports(attribute)) {
checkNotCreate(view, attribute, create);
file.setAttribute("dos", attribute, checkType(view, attribute, value, Boolean.class));
}
}
@Override
public Class<DosFileAttributeView> viewType() {
return DosFileAttributeView.class;
}
@Override
public DosFileAttributeView view(
FileLookup lookup, ImmutableMap<String, FileAttributeView> inheritedViews) {
return new View(lookup, (BasicFileAttributeView) inheritedViews.get("basic"));
}
@Override
public Class<DosFileAttributes> attributesType() {
return DosFileAttributes.class;
}
@Override
public DosFileAttributes readAttributes(File file) {
return new Attributes(file);
}
/** Implementation of {@link DosFileAttributeView}. */
private static final class View extends AbstractAttributeView implements DosFileAttributeView {
private final BasicFileAttributeView basicView;
public View(FileLookup lookup, BasicFileAttributeView basicView) {
super(lookup);
this.basicView = checkNotNull(basicView);
}
@Override
public String name() {
return "dos";
}
@Override
public DosFileAttributes readAttributes() throws IOException {
return new Attributes(lookupFile());
}
@Override
public void setTimes(FileTime lastModifiedTime, FileTime lastAccessTime, FileTime createTime)
throws IOException {
basicView.setTimes(lastModifiedTime, lastAccessTime, createTime);
}
@Override
public void setReadOnly(boolean value) throws IOException {
lookupFile().setAttribute("dos", "readonly", value);
}
@Override
public void setHidden(boolean value) throws IOException {
lookupFile().setAttribute("dos", "hidden", value);
}
@Override
public void setSystem(boolean value) throws IOException {
lookupFile().setAttribute("dos", "system", value);
}
@Override
public void setArchive(boolean value) throws IOException {
lookupFile().setAttribute("dos", "archive", value);
}
}
/** Implementation of {@link DosFileAttributes}. */
static class Attributes extends BasicAttributeProvider.Attributes implements DosFileAttributes {
private final boolean readOnly;
private final boolean hidden;
private final boolean archive;
private final boolean system;
protected Attributes(File file) {
super(file);
this.readOnly = (boolean) file.getAttribute("dos", "readonly");
this.hidden = (boolean) file.getAttribute("dos", "hidden");
this.archive = (boolean) file.getAttribute("dos", "archive");
this.system = (boolean) file.getAttribute("dos", "system");
}
@Override
public boolean isReadOnly() {
return readOnly;
}
@Override
public boolean isHidden() {
return hidden;
}
@Override
public boolean isArchive() {
return archive;
}
@Override
public boolean isSystem() {
return system;
}
}
}
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