/**
* Copyright 2005-2011 Noelios Technologies.
*
* The contents of this file are subject to the terms of one of the following
* open source licenses: LGPL 3.0 or LGPL 2.1 or CDDL 1.0 or EPL 1.0 (the
* "Licenses"). You can select the license that you prefer but you may not use
* this file except in compliance with one of these Licenses.
*
* You can obtain a copy of the LGPL 3.0 license at
* http://www.opensource.org/licenses/lgpl-3.0.html
*
* You can obtain a copy of the LGPL 2.1 license at
* http://www.opensource.org/licenses/lgpl-2.1.php
*
* You can obtain a copy of the CDDL 1.0 license at
* http://www.opensource.org/licenses/cddl1.php
*
* You can obtain a copy of the EPL 1.0 license at
* http://www.opensource.org/licenses/eclipse-1.0.php
*
* See the Licenses for the specific language governing permissions and
* limitations under the Licenses.
*
* Alternatively, you can obtain a royalty free commercial license with less
* limitations, transferable or non-transferable, directly at
* http://www.noelios.com/products/restlet-engine
*
* Restlet is a registered trademark of Noelios Technologies.
*/
package org.restlet.client.engine.header;
import java.util.Iterator;
import java.util.List;
import org.restlet.client.data.Product;
/**
* User agent header writer.
*
* @author Thierry Boileau
*/
public class ProductWriter {
/**
* Formats the given List of Products to a String.
*
* @param products
* The list of products to format.
* @return the List of Products as String.
*/
public static String write(List<Product> products) {
StringBuilder builder = new StringBuilder();
for (Iterator<Product> iterator = products.iterator(); iterator
.hasNext();) {
Product product = iterator.next();
if ((product.getName() == null)
|| (product.getName().length() == 0)) {
throw new IllegalArgumentException(
"Product name cannot be null.");
}
builder.append(product.getName());
if (product.getVersion() != null) {
builder.append("/").append(product.getVersion());
}
if (product.getComment() != null) {
builder.append(" (").append(product.getComment()).append(")");
}
if (iterator.hasNext()) {
builder.append(" ");
}
}
return builder.toString();
}
}