classlib: add FileTime and BasicFileAttributes (#929)

classlib/src/main/java/org/teavm/classlib/java/nio/file/attribute/TBasicFileAttributes.java

@@ -0,0 +1,36 @@
+/*
+ *  Copyright 2024 Jonathan Coates.
+ *
+ *  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 org.teavm.classlib.java.nio.file.attribute;
+
+public interface TBasicFileAttributes {
+    TFileTime creationTime();
+
+    Object fileKey();
+
+    boolean isDirectory();
+
+    boolean isOther();
+
+    boolean isRegularFile();
+
+    boolean isSymbolicLink();
+
+    TFileTime lastAccessTime();
+
+    TFileTime lastModifiedTime();
+
+    long size();
+}

classlib/src/main/java/org/teavm/classlib/java/nio/file/attribute/TFileTime.java

@@ -0,0 +1,72 @@
+/*
+ *  Copyright 2024 Jonathan Coates.
+ *
+ *  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 org.teavm.classlib.java.nio.file.attribute;
+
+import org.teavm.classlib.java.util.concurrent.TTimeUnit;
+import org.threeten.bp.Instant;
+
+public class TFileTime implements Comparable<TFileTime> {
+    private final long value;
+    private final TTimeUnit unit;
+    private Instant instant;
+
+    private TFileTime(long value, TTimeUnit unit, Instant instant) {
+        this.value = value;
+        this.unit = unit;
+    }
+
+    public static TFileTime from(long value, TTimeUnit timeUnit) {
+        return new TFileTime(value, timeUnit, null);
+    }
+
+    public static TFileTime from(Instant instant) {
+        return new TFileTime(instant.toEpochMilli(), TTimeUnit.MILLISECONDS, instant);
+    }
+
+    public static TFileTime fromMillis(long value) {
+        return new TFileTime(value, TTimeUnit.MILLISECONDS, null);
+    }
+
+    public long toMillis() {
+        return unit.toMillis(value);
+    }
+
+    public long to(TTimeUnit target) {
+        return target.convert(value, unit);
+    }
+
+    public Instant toInstant() {
+        if (instant == null) {
+            instant = Instant.ofEpochMilli(toMillis());
+        }
+        return instant;
+    }
+
+    @Override
+    public int compareTo(TFileTime o) {
+        return toInstant().compareTo(o.toInstant());
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        return this == obj || (obj instanceof TFileTime && toInstant().equals(((TFileTime) obj).toInstant()));
+    }
+
+    @Override
+    public int hashCode() {
+        return toInstant().hashCode();
+    }
+}