/**
 * 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.wss4j.binding.wsu10;

import javax.xml.bind.annotation.XmlTransient;
import javax.xml.datatype.DatatypeConfigurationException;
import javax.xml.datatype.DatatypeFactory;
import javax.xml.datatype.XMLGregorianCalendar;

@XmlTransient
public abstract class AbstractAttributedDateTime {

    private static final DatatypeFactory datatypeFactory;

    static {
        try {
            datatypeFactory = DatatypeFactory.newInstance();
        } catch (DatatypeConfigurationException e) {
            throw new RuntimeException(e);
        }
    }

    @XmlTransient
    private XMLGregorianCalendar xmlGregorianCalendar;

    public abstract String getValue();

    public XMLGregorianCalendar getAsXMLGregorianCalendar() throws IllegalArgumentException {
        if (xmlGregorianCalendar == null && getValue() != null) {
            xmlGregorianCalendar = datatypeFactory.newXMLGregorianCalendar(getValue());
        }
        return xmlGregorianCalendar;
    }
}