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/*
 * Licensed to the University Corporation for Advanced Internet Development,
 * Inc. (UCAID) under one or more contributor license agreements.  See the
 * NOTICE file distributed with this work for additional information regarding
 * copyright ownership. The UCAID licenses this file to You under the Apache
 * License, Version 2.0 (the "License"); you may not use this file except in
 * compliance with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.opensaml.saml.ext.saml2alg.impl;

import java.util.Collections;
import java.util.List;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import javax.xml.namespace.QName;

import org.opensaml.core.xml.AbstractXMLObject;
import org.opensaml.core.xml.XMLObject;
import org.opensaml.core.xml.util.IndexedXMLObjectChildrenList;
import org.opensaml.saml.ext.saml2alg.DigestMethod;

/**
 * Implementation of {@link DigestMethod}.
 */
public class DigestMethodImpl extends AbstractXMLObject implements DigestMethod {
    
    /** Wildcard child elements. */
    private final IndexedXMLObjectChildrenList unknownChildren;
    
    /** Algorithm attribute value. */
    private String algorithm;

    /**
     * Constructor.
     *
     * @param namespaceURI the namespace URI
     * @param elementLocalName the element local name
     * @param namespacePrefix the namespace prefix
     */
    public DigestMethodImpl(@Nullable final String namespaceURI, @Nonnull final String elementLocalName,
            @Nullable final String namespacePrefix) {
        super(namespaceURI, elementLocalName, namespacePrefix);
        unknownChildren = new IndexedXMLObjectChildrenList<>(this);
    }
    
    /** {@inheritDoc} */
    @Nullable public String getAlgorithm() {
        return algorithm;
    }

    /** {@inheritDoc} */
    public void setAlgorithm(@Nullable final String newValue) {
        algorithm = prepareForAssignment(algorithm, newValue);
    }
    
    /**
     * {@inheritDoc}
     */
    public List getUnknownXMLObjects() {
        return unknownChildren;
    }
    
    /** {@inheritDoc} */
    public List getUnknownXMLObjects(final QName typeOrName) {
        return (List) unknownChildren.subList(typeOrName);
    }

    /** {@inheritDoc} */
    public List getOrderedChildren() {
        return Collections.unmodifiableList(unknownChildren);
    }

}