Jaxb2 class source to byte

[Rômulo Sorato]

Hi Everyone,
Here´s the situation:
I have a jaxb2 class and i need to get the byte[] data of this class to get the md5 hashcode of this source.
Actually the hashcode of this object we using to naming the xml file.
So the question is:
Do i need to marshaller to a physical file first or is possible to obtain the hashcode before create the physical xml file?
If is possible before,how can i do this?

This is what i tried to do:

// generate hash code

				// 1 - get bytes from JaxbClass object
				ByteArrayOutputStream xmlStream = new ByteArrayOutputStream();
				marshaller.marshal(bannerPack, (Result) xmlStream); //This throwns an error cannot convert ByteArrayOutputStream  to Result
				byte[] xml = xmlStream.toByteArray();

				// 2- Obtain the hash code with specified byte stream data.
				String fileName = null;
				try {
					xmlStream.close();
					byte[] checksum = FileNameUtils.generateChecksum("MD5", xml);
					fileName = "SEQ_" + checksum.toString() + ".xml";
				} 
				catch (IOException e) {
					e.getMessage();
					e.printStackTrace();
				}

[Campbell Ritchie]

A result object is not a byte array output stream object and a byte array output stream object is not a result object. You cannot apply that cast in line 5. Please explain what you are trying to do.

[Rômulo Sorato]

Thank you for the answer,we solved just changing

marshaller.marshal(bannerPack, (Result) xmlStream);

to

marshaller.marshal(mediaPack, new StreamResult(xmlStream));

The problem now is that the code works for other´s jaxbClass but not the one we want,and we don´t see any mapping error in this jaxbClass,could you help me figure out what is wrong with this xml class?

/**
 * 
 */
package br.com.digilab.sg2.bo.export;

import java.util.ArrayList;
import java.util.List;

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;

import org.springframework.stereotype.Component;


@Component
@XmlRootElement(name = "banners")
public class BannerPack {

	private List<Banner> bannersList;

	public BannerPack() {
		bannersList = new ArrayList<Banner>();
	}

	@XmlElement(name = "bannersList")
	public List<Banner> getBanners() {
		return bannersList;
	}

	public void setBanners(List<Banner> banners) {
		this.bannersList = banners;
	}

	@Component
	public static class Banner {
		private String imagem;
		private String exibicao;
		private String dataini;
		private String datafim;

		@XmlAttribute(name = "imagem")
		public String getImagem() {
			return imagem;
		}

		@XmlAttribute(name = "exibicao")
		public String getExibicao() {
			return exibicao;
		}

		@XmlAttribute(name = "dataini")
		public String getDataini() {
			return dataini;
		}

		@XmlAttribute(name = "datafim")
		public String getDatafim() {
			return datafim;
		}

		public void setImagem(String imagem) {
			this.imagem = imagem;
		}

		public void setExibicao(String exibicao) {
			this.exibicao = exibicao;
		}

		public void setDataini(String dataini) {
			this.dataini = dataini;
		}

		public void setDatafim(String datafim) {
			this.datafim = datafim;
		}

	}

}

[Knute Snortum]

Can you post the error message exactly as you get it?

[Rômulo Sorato]

Sorry for the late reply,we already solved,i forgot to mapping in the web.xml the newer jaxb classes.