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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.FileAttributeView;
import java.nio.file.attribute.FileTime;
import java.util.HashMap;
import java.util.Map;
import org.checkerframework.checker.nullness.compatqual.NullableDecl;
/** @author Colin Decker */
public final class TestAttributeProvider extends AttributeProvider {
private static final ImmutableSet<String> ATTRIBUTES = ImmutableSet.of("foo", "bar", "baz");
@Override
public String name() {
return "test";
}
@Override
public ImmutableSet<String> inherits() {
return ImmutableSet.of("basic");
}
@Override
public ImmutableSet<String> fixedAttributes() {
return ATTRIBUTES;
}
@Override
public ImmutableMap<String, ?> defaultValues(Map<String, ?> userDefaults) {
Map<String, Object> result = new HashMap<>();
Long bar = 0L;
Integer baz = 1;
if (userDefaults.containsKey("test:bar")) {
bar = checkType("test", "bar", userDefaults.get("test:bar"), Number.class).longValue();
}
if (userDefaults.containsKey("test:baz")) {
baz = checkType("test", "baz", userDefaults.get("test:baz"), Integer.class);
}
result.put("test:bar", bar);
result.put("test:baz", baz);
return ImmutableMap.copyOf(result);
}
@Override
public void set(File file, String view, String attribute, Object value, boolean create) {
switch (attribute) {
case "bar":
checkNotCreate(view, attribute, create);
file.setAttribute(
"test", "bar", checkType(view, attribute, value, Number.class).longValue());
break;
case "baz":
file.setAttribute("test", "baz", checkType(view, attribute, value, Integer.class));
break;
default:
throw unsettable(view, attribute, create);
}
}
@Override
public Object get(File file, String attribute) {
if (attribute.equals("foo")) {
return "hello";
}
return file.getAttribute("test", attribute);
}
@Override
public Class<TestAttributeView> viewType() {
return TestAttributeView.class;
}
@Override
public TestAttributeView view(
FileLookup lookup, ImmutableMap<String, FileAttributeView> inheritedViews) {
return new View(lookup, (BasicFileAttributeView) inheritedViews.get("basic"));
}
@Override
public Class<TestAttributes> attributesType() {
return TestAttributes.class;
}
@Override
public TestAttributes readAttributes(File file) {
return new Attributes(file);
}
static final class View implements TestAttributeView {
private final FileLookup lookup;
private final BasicFileAttributeView basicView;
public View(FileLookup lookup, BasicFileAttributeView basicView) {
this.lookup = checkNotNull(lookup);
this.basicView = checkNotNull(basicView);
}
@Override
public String name() {
return "test";
}
@Override
public Attributes readAttributes() throws IOException {
return new Attributes(lookup.lookup());
}
@Override
public void setTimes(
@NullableDecl FileTime lastModifiedTime,
@NullableDecl FileTime lastAccessTime,
@NullableDecl FileTime createTime)
throws IOException {
basicView.setTimes(lastModifiedTime, lastAccessTime, createTime);
}
@Override
public void setBar(long bar) throws IOException {
lookup.lookup().setAttribute("test", "bar", bar);
}
@Override
public void setBaz(int baz) throws IOException {
lookup.lookup().setAttribute("test", "baz", baz);
}
}
static final class Attributes implements TestAttributes {
private final Long bar;
private final Integer baz;
public Attributes(File file) {
this.bar = (Long) file.getAttribute("test", "bar");
this.baz = (Integer) file.getAttribute("test", "baz");
}
@Override
public String foo() {
return "hello";
}
@Override
public long bar() {
return bar;
}
@Override
public int baz() {
return baz;
}
// BasicFileAttributes is just implemented here because readAttributes requires a subtype of
// BasicFileAttributes -- methods are not implemented
@Override
public FileTime lastModifiedTime() {
return null;
}
@Override
public FileTime lastAccessTime() {
return null;
}
@Override
public FileTime creationTime() {
return null;
}
@Override
public boolean isRegularFile() {
return false;
}
@Override
public boolean isDirectory() {
return false;
}
@Override
public boolean isSymbolicLink() {
return false;
}
@Override
public boolean isOther() {
return false;
}
@Override
public long size() {
return 0;
}
@Override
public Object fileKey() {
return null;
}
}
}
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