1 /* 2 * Copyright [2005] [University Corporation for Advanced Internet Development, Inc.] 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package org.opensaml.xml.util; 18 19 import org.opensaml.xml.Configuration; 20 import org.opensaml.xml.XMLObject; 21 import org.opensaml.xml.io.Marshaller; 22 import org.opensaml.xml.io.MarshallingException; 23 import org.opensaml.xml.io.Unmarshaller; 24 import org.opensaml.xml.io.UnmarshallingException; 25 import org.w3c.dom.Element; 26 27 28 /** 29 * A helper class for working with XMLObjects. 30 */ 31 public final class XMLObjectHelper { 32 33 /** Constructor. */ 34 private XMLObjectHelper() { } 35 36 /** 37 * Clone an XMLObject by brute force: 38 * 39 * 1) Marshall the original object if necessary 40 * 2) Clone the resulting DOM Element 41 * 3) Unmarshall a new XMLObject tree around it. 42 * 43 * @param originalXMLObject the object to be cloned 44 * @return a clone of the original object 45 * 46 * @throws MarshallingException if original object can not be marshalled 47 * @throws UnmarshallingException if cloned object tree can not be unmarshalled 48 * 49 * @param <T> the type of object being cloned 50 */ 51 public static <T extends XMLObject> T cloneXMLObject(T originalXMLObject) 52 throws MarshallingException, UnmarshallingException { 53 54 if (originalXMLObject == null) { 55 return null; 56 } 57 58 Marshaller marshaller = Configuration.getMarshallerFactory().getMarshaller(originalXMLObject); 59 Element origElement = marshaller.marshall(originalXMLObject); 60 61 Element clonedElement = (Element) origElement.cloneNode(true); 62 63 Unmarshaller unmarshaller = Configuration.getUnmarshallerFactory().getUnmarshaller(clonedElement); 64 T clonedXMLObject = (T) unmarshaller.unmarshall(clonedElement); 65 66 return clonedXMLObject; 67 } 68 69 }