mirror of
https://github.com/mitb-archive/filebot
synced 2024-12-23 16:28:51 -05:00
170 lines
3.9 KiB
Java
170 lines
3.9 KiB
Java
package net.filebot;
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import static java.nio.charset.StandardCharsets.*;
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import static net.filebot.Logging.*;
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import java.io.File;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.nio.file.FileSystemException;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.attribute.UserDefinedFileAttributeView;
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import java.util.AbstractMap;
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import java.util.LinkedHashSet;
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import java.util.List;
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import java.util.Set;
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import com.sun.jna.Platform;
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import net.filebot.platform.mac.MacXattrView;
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public class MetaAttributeView extends AbstractMap<String, String> {
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private final Object xattr;
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public MetaAttributeView(File file) throws IOException {
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// resolve symlinks
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Path path = file.toPath().toRealPath();
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// UserDefinedFileAttributeView (for Windows and Linux) OR our own xattr.h JNA wrapper via MacXattrView (for Mac) because UserDefinedFileAttributeView is not supported (Oracle Java 7/8)
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if (Platform.isMac()) {
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xattr = new MacXattrView(path);
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} else {
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xattr = Files.getFileAttributeView(path, UserDefinedFileAttributeView.class);
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}
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// sanity check
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if (xattr == null) {
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throw new IOException("UserDefinedFileAttributeView is not supported");
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}
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}
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@Override
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public String get(Object key) {
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return get(key.toString());
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}
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public String get(String key) {
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try {
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if (xattr instanceof UserDefinedFileAttributeView) {
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UserDefinedFileAttributeView attributeView = (UserDefinedFileAttributeView) xattr;
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try {
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ByteBuffer buffer = ByteBuffer.allocate(attributeView.size(key));
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attributeView.read(key, buffer);
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buffer.flip();
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return UTF_8.decode(buffer).toString();
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} catch (FileSystemException e) {
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// attribute does not exist
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return null;
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}
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}
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if (xattr instanceof MacXattrView) {
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MacXattrView macXattr = (MacXattrView) xattr;
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return macXattr.read(key);
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}
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} catch (IOException e) {
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debug.warning(cause(e));
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}
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return null;
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}
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@Override
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public String put(String key, String value) {
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try {
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if (xattr instanceof UserDefinedFileAttributeView) {
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UserDefinedFileAttributeView attributeView = (UserDefinedFileAttributeView) xattr;
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if (value == null || value.isEmpty()) {
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attributeView.delete(key);
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} else {
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attributeView.write(key, UTF_8.encode(value));
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}
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}
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if (xattr instanceof MacXattrView) {
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MacXattrView macXattr = (MacXattrView) xattr;
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if (value == null || value.isEmpty()) {
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macXattr.delete(key);
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} else {
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macXattr.write(key, value);
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}
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}
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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return null; // since we don't know the old value
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}
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@Override
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public void clear() {
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try {
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for (String key : list()) {
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put(key, null);
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}
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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}
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public List<String> list() throws IOException {
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if (xattr instanceof UserDefinedFileAttributeView) {
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UserDefinedFileAttributeView attributeView = (UserDefinedFileAttributeView) xattr;
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return attributeView.list();
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}
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if (xattr instanceof MacXattrView) {
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MacXattrView macXattr = (MacXattrView) xattr;
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return macXattr.list();
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}
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return null;
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}
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@Override
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public Set<Entry<String, String>> entrySet() {
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try {
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Set<Entry<String, String>> entries = new LinkedHashSet<Entry<String, String>>();
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for (String name : list()) {
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entries.add(new AttributeEntry(name));
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}
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return entries;
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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}
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private class AttributeEntry implements Entry<String, String> {
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private final String name;
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public AttributeEntry(String name) {
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this.name = name;
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}
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@Override
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public String getKey() {
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return name;
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}
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@Override
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public String getValue() {
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return get(name);
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}
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@Override
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public String setValue(String value) {
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return put(name, value);
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}
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@Override
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public String toString() {
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return getKey() + "=" + getValue();
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}
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}
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}
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