CollectionToStringTransformer.java

package com.ricston.transformers;

import org.mule.api.transformer.TransformerException;
import org.mule.transformer.AbstractTransformer;

import java.util.Collection;

public class CollectionToStringTransformer extends AbstractTransformer{

   protected static final String XML_HEADER = "<!--?xml version="1.0" encoding="UTF-8"?-->";
   protected static final String PEOPLE1 = "";
   protected static final String PEOPLE2 = "";

   public String collectionToString(Collection collection){
      StringBuilder builder = new StringBuilder(XML_HEADER + "n" + PEOPLE1);

      for(String s : collection){
         builder.append(s.replace(XML_HEADER, "") + "n");
      }
      builder.append(PEOPLE2);
      return builder.toString();
   }

   @Override
   protected Object doTransform(Object payload, String encoding) throws TransformerException {
      return collectionToString((Collection)payload);
   }
}