/*

 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * $Id: DOMStructure.java,v 1.6 2005/05/09 18:33:26 mullan Exp $

 */

package javax.xml.crypto.dom;

import org.w3c.dom.Node;

import javax.xml.crypto.XMLStructure;

import javax.xml.crypto.dsig.XMLSignature;

/**

 * A DOM-specific {@link XMLStructure}. The purpose of this class is to

 * allow a DOM node to be used to represent extensible content (any elements

 * or mixed content) in XML Signature structures.

 *

 * <p>If a sequence of nodes is needed, the node contained in the

 * <code>DOMStructure</code> is the first node of the sequence and successive

 * nodes can be accessed by invoking {@link Node#getNextSibling}.

 *

 * <p>If the owner document of the <code>DOMStructure</code> is different than

 * the target document of an <code>XMLSignature</code>, the

 * {@link XMLSignature#sign(XMLSignContext)} method imports the node into the

 * target document before generating the signature.

 *

 * @author Sean Mullan

 * @author JSR 105 Expert Group

 * @since 1.6

 */

public class DOMStructure implements XMLStructure {

    private final Node node;

    /**

     * Creates a <code>DOMStructure</code> containing the specified node.

     *

     * @param node the node

     * @throws NullPointerException if <code>node</code> is <code>null</code>

     */

    public DOMStructure(Node node) {

        if (node == null) {

            throw new NullPointerException("node cannot be null");

        }

        this.node = node;

    }

    /**

     * Returns the node contained in this <code>DOMStructure</code>.

     *

     * @return the node

     */

    public Node getNode() {

        return node;

    }

    /**

     * @throws NullPointerException {@inheritDoc}

     */

    public boolean isFeatureSupported(String feature) {

        if (feature == null) {

            throw new NullPointerException();

        } else {

            return false;

        }

    }

}