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package com.netflix.astyanax.serializers;

import java.nio.ByteBuffer;
import java.nio.charset.Charset;

import org.apache.cassandra.db.marshal.AsciiType;

/**
 * Almost identical to StringSerializer except we use the US-ASCII character set
 * code
 * 
 * @author zznate
 */
public final class AsciiSerializer extends AbstractSerializer {

    private static final String US_ASCII = "US-ASCII";
    private static final AsciiSerializer instance = new AsciiSerializer();
    private static final Charset charset = Charset.forName(US_ASCII);

    public static AsciiSerializer get() {
        return instance;
    }

    @Override
    public String fromByteBuffer(final ByteBuffer byteBuffer) {
        if (byteBuffer == null) {
            return null;
        }
        ByteBuffer dup = byteBuffer.duplicate();
        return charset.decode(dup).toString();
    }

    @Override
    public ByteBuffer toByteBuffer(String obj) {
        if (obj == null) {
            return null;
        }
        return ByteBuffer.wrap(obj.getBytes(charset));
    }

    @Override
    public ComparatorType getComparatorType() {
        return ComparatorType.ASCIITYPE;
    }

    @Override
    public ByteBuffer fromString(String str) {
        return AsciiType.instance.fromString(str);
    }

    @Override
    public String getString(final ByteBuffer byteBuffer) {
        if (byteBuffer == null)
            return null;
        return AsciiType.instance.getString(byteBuffer.duplicate());
    }
}