gistfile1.java

package org.mule.sfdc2boxnet.transformer;

import java.util.List;
import java.util.Map;

import org.mule.api.MuleMessage;
import org.mule.api.transformer.TransformerException;
import org.mule.transformer.AbstractMessageTransformer;
import org.mule.transformer.codec.Base64Decoder;

/**
 * 
 * @author mariano.gonzalez@mulesoft.com
 *
 */
public class ExtractAttachmentTransformer extends AbstractMessageTransformer {

	private static final Base64Decoder base64Decoder = new Base64Decoder();
	
	@Override
	@SuppressWarnings("unchecked")
	public Object transformMessage(MuleMessage message, String outputEncoding) throws TransformerException {
		List<Map<String, String>> list = (List<Map<String,String>>) message.getPayload();
		
		if (list.size() != 1) {
			throw new RuntimeException(String.format("query was expected to return one result but instead returned %d", list.size()));
		}
		
		Map<String, String> payload = list.get(0);
		String name = payload.get("Name");
		message.setOutboundProperty("attachName", name);
		message.setPayload(this.parseBytes(payload.get("Body").toString()));
		
		return message;
	}
	
	private byte[] parseBytes(String value) {
		try {
			return (byte[]) base64Decoder.doTransform(value, "UTF-8");
		} catch (TransformerException e) {
			throw new RuntimeException(e);
		}
	}
}