JDK14/Java14源码在线阅读

/*
 * Copyright (c) 2005, 2014, 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: XPathFilter2ParameterSpec.java,v 1.7 2005/05/13 18:45:42 mullan Exp $
 */
package javax.xml.crypto.dsig.spec;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.xml.crypto.dsig.Transform;

/**
 * Parameters for the W3C Recommendation
 * <a href="http://www.w3.org/TR/xmldsig-filter2/">
 * XPath Filter 2.0 Transform Algorithm</a>.
 * The parameters include a list of one or more {@link XPathType} objects.
 *
 * @author Sean Mullan
 * @author JSR 105 Expert Group
 * @since 1.6
 * @see Transform
 * @see XPathFilterParameterSpec
 */
public final class XPathFilter2ParameterSpec implements TransformParameterSpec {

    private final List<XPathType> xPathList;

    /**
     * Creates an <code>XPathFilter2ParameterSpec</code>.
     *
     * @param xPathList a list of one or more {@link XPathType} objects. The
     *    list is defensively copied to protect against subsequent modification.
     * @throws ClassCastException if <code>xPathList</code> contains any
     *    entries that are not of type {@link XPathType}
     * @throws IllegalArgumentException if <code>xPathList</code> is empty
     * @throws NullPointerException if <code>xPathList</code> is
     *    <code>null</code>
     */
    public XPathFilter2ParameterSpec(List<XPathType> xPathList) {
        if (xPathList == null) {
            throw new NullPointerException("xPathList cannot be null");
        }
        List<XPathType> tempList =
            Collections.checkedList(new ArrayList<XPathType>(),
                                    XPathType.class);
        tempList.addAll(xPathList);
        if (tempList.isEmpty()) {
            throw new IllegalArgumentException("xPathList cannot be empty");
        }
        this.xPathList = Collections.unmodifiableList(tempList);
    }

    /**

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