/*
 * Copyright 2014 Nicolas Morel
 *
 * 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 com.github.nmorel.gwtjackson.client.ser.array.dd;

import com.github.nmorel.gwtjackson.client.JsonSerializationContext;
import com.github.nmorel.gwtjackson.client.JsonSerializer;
import com.github.nmorel.gwtjackson.client.JsonSerializerParameters;
import com.github.nmorel.gwtjackson.client.stream.JsonWriter;
import com.github.nmorel.gwtjackson.client.utils.Base64Utils;

/**
 * Default {@link JsonSerializer} implementation for 2D array of byte.
 *
 * @author Nicolas Morel
 * @version $Id: $
 */
public class PrimitiveByteArray2dJsonSerializer extends JsonSerializer<byte[][]> {

    private static final PrimitiveByteArray2dJsonSerializer INSTANCE = new PrimitiveByteArray2dJsonSerializer();

    /**
     * <p>getInstance</p>
     *
     * @return an instance of {@link PrimitiveByteArray2dJsonSerializer}
     */
    public static PrimitiveByteArray2dJsonSerializer getInstance() {
        return INSTANCE;
    }

    private PrimitiveByteArray2dJsonSerializer() { }

    /** {@inheritDoc} */
    @Override
    protected boolean isEmpty( byte[][] value ) {
        return null == value || value.length == 0;
    }

    /** {@inheritDoc} */
    @Override
    public void doSerialize( JsonWriter writer, byte[][] values, JsonSerializationContext ctx, JsonSerializerParameters params ) {
        if ( !ctx.isWriteEmptyJsonArrays() && values.length == 0 ) {
            writer.cancelName();
            return;
        }

        writer.beginArray();
        for ( byte[] array : values ) {
            writer.unescapeValue( Base64Utils.toBase64( array ) );
        }
        writer.endArray();
    }
}