/*
 * Copyright 2017 MongoDB, 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 org.bson.json;

import org.bson.BsonTimestamp;
import org.bson.internal.UnsignedLongs;

class ExtendedJsonTimestampConverter implements Converter<BsonTimestamp> {
    @Override
    public void convert(final BsonTimestamp value, final StrictJsonWriter writer) {
        writer.writeStartObject();
        writer.writeStartObject("$timestamp");
        writer.writeNumber("t", UnsignedLongs.toString(toUnsignedLong(value.getTime())));
        writer.writeNumber("i", UnsignedLongs.toString(toUnsignedLong(value.getInc())));
        writer.writeEndObject();
        writer.writeEndObject();
    }

    // Equivalent to Integer.toUnsignedLong() in Java 8
    private long toUnsignedLong(final int value) {
        return ((long) value) & 0xffffffffL;
    }
}
