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    1   /*
    2    * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
    3    * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
    4    *
    5    * This code is free software; you can redistribute it and/or modify it
    6    * under the terms of the GNU General Public License version 2 only, as
    7    * published by the Free Software Foundation.  Oracle designates this
    8    * particular file as subject to the "Classpath" exception as provided
    9    * by Oracle in the LICENSE file that accompanied this code.
   10    *
   11    * This code is distributed in the hope that it will be useful, but WITHOUT
   12    * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   13    * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   14    * version 2 for more details (a copy is included in the LICENSE file that
   15    * accompanied this code).
   16    *
   17    * You should have received a copy of the GNU General Public License version
   18    * 2 along with this work; if not, write to the Free Software Foundation,
   19    * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   20    *
   21    * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   22    * or visit www.oracle.com if you need additional information or have any
   23    * questions.
   24    */
   25   /*
   26    * $Id: DOMStructure.java,v 1.6 2005/05/09 18:33:26 mullan Exp $
   27    */
   28   package javax.xml.crypto.dom;
   29   
   30   import org.w3c.dom.Node;
   31   import javax.xml.crypto.XMLStructure;
   32   import javax.xml.crypto.dsig.XMLSignature;
   33   
   34   /**
   35    * A DOM-specific {@link XMLStructure}. The purpose of this class is to
   36    * allow a DOM node to be used to represent extensible content (any elements
   37    * or mixed content) in XML Signature structures.
   38    *
   39    * <p>If a sequence of nodes is needed, the node contained in the
   40    * <code>DOMStructure</code> is the first node of the sequence and successive
   41    * nodes can be accessed by invoking {@link Node#getNextSibling}.
   42    *
   43    * <p>If the owner document of the <code>DOMStructure</code> is different than
   44    * the target document of an <code>XMLSignature</code>, the
   45    * {@link XMLSignature#sign(XMLSignContext)} method imports the node into the
   46    * target document before generating the signature.
   47    *
   48    * @author Sean Mullan
   49    * @author JSR 105 Expert Group
   50    * @since 1.6
   51    */
   52   public class DOMStructure implements XMLStructure {
   53   
   54       private final Node node;
   55   
   56       /**
   57        * Creates a <code>DOMStructure</code> containing the specified node.
   58        *
   59        * @param node the node
   60        * @throws NullPointerException if <code>node</code> is <code>null</code>
   61        */
   62       public DOMStructure(Node node) {
   63           if (node == null) {
   64               throw new NullPointerException("node cannot be null");
   65           }
   66           this.node = node;
   67       }
   68   
   69       /**
   70        * Returns the node contained in this <code>DOMStructure</code>.
   71        *
   72        * @return the node
   73        */
   74       public Node getNode() {
   75           return node;
   76       }
   77   
   78       /**
   79        * @throws NullPointerException {@inheritDoc}
   80        */
   81       public boolean isFeatureSupported(String feature) {
   82           if (feature == null) {
   83               throw new NullPointerException();
   84           } else {
   85               return false;
   86           }
   87       }
   88   }

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