DateTime adapter (#628)

vtm/src/org/oscim/backend/DateTime.java

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2019 Gustl22
+ *
+ * This program is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.oscim.backend;
+
+import java.util.Calendar;
+
+public class DateTime extends DateTimeAdapter {
+
+    @Override
+    public int getHour() {
+        return Calendar.getInstance().get(Calendar.HOUR_OF_DAY);
+    }
+
+    @Override
+    public int getMinute() {
+        return Calendar.getInstance().get(Calendar.MINUTE);
+    }
+
+    @Override
+    public int getSecond() {
+        return Calendar.getInstance().get(Calendar.SECOND);
+    }
+
+    @Override
+    public int getDayOfYear() {
+        return Calendar.getInstance().get(Calendar.DAY_OF_YEAR);
+    }
+
+    @Override
+    public int getTimeZoneOffset() {
+        Calendar calendar = Calendar.getInstance();
+        return calendar.getTimeZone().getOffset(calendar.getTimeInMillis());
+    }
+}

vtm/src/org/oscim/backend/DateTimeAdapter.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2019 Gustl22
+ *
+ * This program is free software: you can redistribute it and/or modify it under the
+ * terms of the GNU Lesser General Public License as published by the Free Software
+ * Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
+ * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+package org.oscim.backend;
+
+public abstract class DateTimeAdapter {
+
+    public static final long MILLIS_PER_DAY = 86400000L;
+
+    /**
+     * The instance provided by backend
+     */
+    public static DateTimeAdapter instance;
+
+    public static void init(DateTimeAdapter adapter) {
+        DateTimeAdapter.instance = adapter;
+    }
+
+    public abstract int getHour();
+
+    public abstract int getMinute();
+
+    public abstract int getSecond();
+
+    /**
+     * Indicates the day number within the current year. The first day of the year has value 1.
+     */
+    public abstract int getDayOfYear();
+
+    /**
+     * @return the time zone offset in milliseconds
+     */
+    public abstract int getTimeZoneOffset();
+}