143 * Creates a {@link FileAttribute}, encapsulating a copy of the given file
144 * permissions, suitable for passing to the {@link java.nio.file.Files#createFile
145 * createFile} or {@link java.nio.file.Files#createDirectory createDirectory}
146 * methods.
147 *
148 * @param perms
149 * the set of permissions
150 *
151 * @return an attribute encapsulating the given file permissions with
152 * {@link FileAttribute#name name} {@code "posix:permissions"}
153 *
154 * @throws ClassCastException
155 * if the set contains elements that are not of type {@code
156 * PosixFilePermission}
157 */
158 public static FileAttribute<Set<PosixFilePermission>>
159 asFileAttribute(Set<PosixFilePermission> perms)
160 {
161 // copy set and check for nulls (CCE will be thrown if an element is not
162 // a PosixFilePermission)
163 perms = new HashSet<PosixFilePermission>(perms);
164 for (PosixFilePermission p: perms) {
165 if (p == null)
166 throw new NullPointerException();
167 }
168 final Set<PosixFilePermission> value = perms;
169 return new FileAttribute<Set<PosixFilePermission>>() {
170 @Override
171 public String name() {
172 return "posix:permissions";
173 }
174 @Override
175 public Set<PosixFilePermission> value() {
176 return Collections.unmodifiableSet(value);
177 }
178 };
179 }
180 }
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143 * Creates a {@link FileAttribute}, encapsulating a copy of the given file
144 * permissions, suitable for passing to the {@link java.nio.file.Files#createFile
145 * createFile} or {@link java.nio.file.Files#createDirectory createDirectory}
146 * methods.
147 *
148 * @param perms
149 * the set of permissions
150 *
151 * @return an attribute encapsulating the given file permissions with
152 * {@link FileAttribute#name name} {@code "posix:permissions"}
153 *
154 * @throws ClassCastException
155 * if the set contains elements that are not of type {@code
156 * PosixFilePermission}
157 */
158 public static FileAttribute<Set<PosixFilePermission>>
159 asFileAttribute(Set<PosixFilePermission> perms)
160 {
161 // copy set and check for nulls (CCE will be thrown if an element is not
162 // a PosixFilePermission)
163 perms = new HashSet<>(perms);
164 for (PosixFilePermission p: perms) {
165 if (p == null)
166 throw new NullPointerException();
167 }
168 final Set<PosixFilePermission> value = perms;
169 return new FileAttribute<>() {
170 @Override
171 public String name() {
172 return "posix:permissions";
173 }
174 @Override
175 public Set<PosixFilePermission> value() {
176 return Collections.unmodifiableSet(value);
177 }
178 };
179 }
180 }
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