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/*
 * Copyright (c) 2003, 2011, 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
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 */

package javax.net.ssl;

import java.util.*;

import java.security.KeyStore.*;

/**
 * A parameters object for X509KeyManagers that encapsulates a List
 * of KeyStore.Builders.
 *
 * @see java.security.KeyStore.Builder
 * @see X509KeyManager
 *
 * @author  Andreas Sterbenz
 * @since   1.5
 */
public class KeyStoreBuilderParameters implements ManagerFactoryParameters {

    private final List parameters;

    /**
     * Construct new KeyStoreBuilderParameters from the specified
     * {@linkplain java.security.KeyStore.Builder}.
     *
     * @param builder the Builder object
     * @exception NullPointerException if builder is null
     */
    public KeyStoreBuilderParameters(Builder builder) {
        parameters = Collections.singletonList(Objects.requireNonNull(builder));
    }

    /**
     * Construct new KeyStoreBuilderParameters from a List
     * of {@linkplain java.security.KeyStore.Builder}s. Note that the list
     * is cloned to protect against subsequent modification.
     *
     * @param parameters the List of Builder objects
     * @exception NullPointerException if parameters is null
     * @exception IllegalArgumentException if parameters is an empty list
     */
    public KeyStoreBuilderParameters(List parameters) {
        if (parameters.isEmpty()) {
            throw new IllegalArgumentException();
        }

        this.parameters = Collections.unmodifiableList(
            new ArrayList(parameters));
    }

    /**
     * Return the unmodifiable List of the
     * {@linkplain java.security.KeyStore.Builder}s
     * encapsulated by this object.
     *
     * @return the unmodifiable List of the
     * {@linkplain java.security.KeyStore.Builder}s
     * encapsulated by this object.
     */
    public List getParameters() {
        return parameters;
    }

}