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Zodiac Netty Marshallers

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package org.zodiac.netty.marshallers;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.ByteBufUtil;
import io.netty.util.CharsetUtil;

import static org.zodiac.netty.marshallers.NettyContentMarshallers.findCharset;

import java.nio.charset.Charset;
import org.zodiac.sdk.toolkit.marshallers.Marshaller;

final class StringMarshaller implements Marshaller {

    @Override
    public String read(ByteBuf data, Object[] hints) throws Exception {
        byte[] bytes = new byte[data.readableBytes()];
        data.getBytes(0, bytes);
        Charset charset = findCharset(hints);
        if (charset == null) {
            charset = NettyContentMarshallers.findHint(Charset.class, hints, CharsetUtil.UTF_8);
        }
        return new String(bytes, charset);
    }

    @Override
    public void write(String obj, ByteBuf into, Object[] hints) throws Exception {
        Charset charset = findCharset(hints);
        if (CharsetUtil.UTF_8.equals(charset)) {
            ByteBufUtil.writeUtf8(into, obj);
        } else if (CharsetUtil.US_ASCII.equals(charset)) {
            ByteBufUtil.writeAscii(into, obj);
        } else {
            byte[] bytes = obj.getBytes(charset);
            into.writeBytes(bytes);
        }
    }

}