/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF 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.apache.xml.security.algorithms;

import org.apache.xml.security.exceptions.XMLSecurityException;
import org.apache.xml.security.utils.Constants;
import org.apache.xml.security.utils.SignatureElementProxy;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

/**
 * The Algorithm class which stores the Algorithm URI as a string.
 */
public abstract class Algorithm extends SignatureElementProxy {

    /**
     *
     * @param doc
     * @param algorithmURI is the URI of the algorithm as String
     */
    public Algorithm(Document doc, String algorithmURI) {
        super(doc);

        this.setAlgorithmURI(algorithmURI);
    }

    /**
     * Constructor Algorithm
     *
     * @param element
     * @param BaseURI
     * @throws XMLSecurityException
     */
    public Algorithm(Element element, String BaseURI) throws XMLSecurityException {
        super(element, BaseURI);
    }

    /**
     * Method getAlgorithmURI
     *
     * @return The URI of the algorithm
     */
    public String getAlgorithmURI() {
        return this.constructionElement.getAttributeNS(null, Constants._ATT_ALGORITHM);
    }

    /**
     * Sets the algorithm's URI as used in the signature.
     *
     * @param algorithmURI is the URI of the algorithm as String
     */
    protected void setAlgorithmURI(String algorithmURI) {
        if (algorithmURI != null) {
            this.constructionElement.setAttributeNS(
                null, Constants._ATT_ALGORITHM, algorithmURI
            );
        }
    }
}
