content: package com.alibaba.datax.common.element;
  
  import com.alibaba.datax.common.exception.CommonErrorCode;
  import com.alibaba.datax.common.exception.DataXException;
  import org.apache.commons.lang3.ArrayUtils;
  
  import java.math.BigDecimal;
  import java.math.BigInteger;
  import java.util.Date;
  
  /**
   * Created by jingxing on 14-8-24.
   */
  public class BytesColumn extends Column {
  
  	public BytesColumn() {
  		this(null);
  	}
  
  	public BytesColumn(byte[] bytes) {
  		super(ArrayUtils.clone(bytes), Column.Type.BYTES, null == bytes ? 0
  				: bytes.length);
  	}
  
  	@Override
  	public byte[] asBytes() {
  		if (null == this.getRawData()) {
  			return null;
  		}
  
  		return (byte[]) this.getRawData();
  	}
  
  	@Override
  	public String asString() {
  		if (null == this.getRawData()) {
  			return null;
  		}
  
  		try {
  			return ColumnCast.bytes2String(this);
  		} catch (Exception e) {
  			throw DataXException.asDataXException(
  					CommonErrorCode.CONVERT_NOT_SUPPORT,
  					String.format("Bytes[%s]不能转为String .", this.toString()));
  		}
  	}
  
  	@Override
  	public Long asLong() {
  		throw DataXException.asDataXException(
  				CommonErrorCode.CONVERT_NOT_SUPPORT, "Bytes类型不能转为Long .");
  	}
  
  	@Override
  	public BigDecimal asBigDecimal() {
  		throw DataXException.asDataXException(
  				CommonErrorCode.CONVERT_NOT_SUPPORT, "Bytes类型不能转为BigDecimal .");
  	}
  
  	@Override
  	public BigInteger asBigInteger() {
  		throw DataXException.asDataXException(
  				CommonErrorCode.CONVERT_NOT_SUPPORT, "Bytes类型不能转为BigInteger .");
  	}
  
  	@Override
  	public Double asDouble() {
  		throw DataXException.asDataXException(
  				CommonErrorCode.CONVERT_NOT_SUPPORT, "Bytes类型不能转为Long .");
  	}
  
  	@Override
  	public Date asDate() {
  		throw DataXException.asDataXException(
  				CommonErrorCode.CONVERT_NOT_SUPPORT, "Bytes类型不能转为Date .");
  	}
  	
  	@Override
  	public Date asDate(String dateFormat) {
  		throw DataXException.asDataXException(
  				CommonErrorCode.CONVERT_NOT_SUPPORT, "Bytes类型不能转为Date .");
  	}
  
  	@Override
  	public Boolean asBoolean() {
  		throw DataXException.asDataXException(
  				CommonErrorCode.CONVERT_NOT_SUPPORT, "Bytes类型不能转为Boolean .");
  	}
  }
  