/* * 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: ExcC14NParameterSpec.java,v 1.7 2005/05/13 18:45:42 mullan Exp $ */package javax.xml.crypto.dsig.spec; import javax.xml.crypto.dsig.CanonicalizationMethod;import java.util.ArrayList;import java.util.Collections;import java.util.List; /** * Parameters for the W3C Recommendation: * <a href="http://www.w3.org/TR/xml-exc-c14n/"> * Exclusive XML Canonicalization (C14N) algorithm</a>. The * parameters include an optional inclusive namespace prefix list. The XML * Schema Definition of the Exclusive XML Canonicalization parameters is * defined as: * <pre><code> * &lt;schema xmlns="http://www.w3.org/2001/XMLSchema" *         xmlns:ec="http://www.w3.org/2001/10/xml-exc-c14n#" *         targetNamespace="http://www.w3.org/2001/10/xml-exc-c14n#" *         version="0.1" elementFormDefault="qualified"&gt; * * &lt;element name="InclusiveNamespaces" type="ec:InclusiveNamespaces"/&gt; * &lt;complexType name="InclusiveNamespaces"&gt; *   &lt;attribute name="PrefixList" type="xsd:string"/&gt; * &lt;/complexType&gt; * &lt;/schema&gt; * </code></pre> * * @author Sean Mullan * @author JSR 105 Expert Group * @since 1.6 * @see CanonicalizationMethod */public final class ExcC14NParameterSpec implements C14NMethodParameterSpec {     private List preList;     /**     * Indicates the default namespace ("#default").     */    public static final String DEFAULT = "#default";     /**     * Creates a <code>ExcC14NParameterSpec</code> with an empty prefix     * list.     */    public ExcC14NParameterSpec() {        preList = Collections.EMPTY_LIST;    }     /**     * Creates a <code>ExcC14NParameterSpec</code> with the specified list     * of prefixes. The list is copied to protect against subsequent     * modification.     *     * @param prefixList the inclusive namespace prefix list. Each entry in     *    the list is a <code>String</code> that represents a namespace prefix.     * @throws NullPointerException if <code>prefixList</code> is     *    <code>null</code>     * @throws ClassCastException if any of the entries in the list are not     *    of type <code>String</code>     */    public ExcC14NParameterSpec(List prefixList) {        if (prefixList == null) {            throw new NullPointerException("prefixList cannot be null");        }        this.preList = new ArrayList(prefixList);        for (int i = 0, size = preList.size(); i < size; i++) {            if (!(preList.get(i) instanceof String)) {                throw new ClassCastException("not a String");            }        }        preList = Collections.unmodifiableList(preList);    }     /**     * Returns the inclusive namespace prefix list. Each entry in the list     * is a <code>String</code> that represents a namespace prefix.     *     * <p>This implementation returns an {@link     * java.util.Collections#unmodifiableList unmodifiable list}.     *     * @return the inclusive namespace prefix list (may be empty but never     *    <code>null</code>)     */    public List getPrefixList() {        return preList;    }}