Java tutorial
package com.dubture.composer.ui.converter; import java.util.ArrayList; import org.apache.commons.lang.StringUtils; import org.eclipse.core.databinding.conversion.Converter; import org.getcomposer.core.collection.License; public class License2StringConverter extends Converter { public License2StringConverter() { super(String[].class, String.class); } @Override public String convert(Object fromObject) { ArrayList<String> list = new ArrayList<String>(); License licenses = (License) fromObject; for (String license : licenses) { list.add(license); } if (list.size() == 0) { return ""; } return StringUtils.join(list.toArray(), ", "); } }