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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.soap.wssecurity.impl;

import org.joda.time.DateTime;
import org.joda.time.chrono.ISOChronology;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;
import org.opensaml.core.xml.util.AttributeMap;
import org.opensaml.soap.wssecurity.AttributedDateTime;
import org.opensaml.soap.wssecurity.IdBearing;

/**
 * Implementation of {@link AttributedDateTime}.
 * 
 */
public class AttributedDateTimeImpl extends AbstractWSSecurityObject implements AttributedDateTime {

    /** DateTime formatter. */
    private DateTimeFormatter formatter;

    /** DateTime object. */
    private DateTime dateTimeValue;

    /** String dateTime representation. */
    private String stringValue;
    
    /** wsu:id attribute value. */
    private String id;
    
    /** Wildcard attributes. */
    private AttributeMap unknownAttributes;

    /**
     * Constructor.
     * 
     * @param namespaceURI namespace of the element
     * @param elementLocalName name of the element
     * @param namespacePrefix namespace prefix of the element
     */
    public AttributedDateTimeImpl(String namespaceURI, String elementLocalName, String namespacePrefix) {
        super(namespaceURI, elementLocalName, namespacePrefix);
        formatter = ISODateTimeFormat.dateTime().withChronology(ISOChronology.getInstanceUTC());
        unknownAttributes = new AttributeMap(this);
    }

    /** {@inheritDoc} */
    public DateTime getDateTime() {
        return dateTimeValue;
    }

    /** {@inheritDoc} */
    public void setDateTime(DateTime newDateTime) {
        dateTimeValue = newDateTime;
        String formattedDateTime = formatter.print(dateTimeValue);
        stringValue = prepareForAssignment(stringValue, formattedDateTime);
    }

    /** {@inheritDoc} */
    public String getValue() {
        return stringValue;
    }

    /** {@inheritDoc} */
    public void setValue(String newValue) {
        dateTimeValue = new DateTime(newValue).withChronology(ISOChronology.getInstanceUTC());
        stringValue = prepareForAssignment(stringValue, newValue);
    }

    /** {@inheritDoc} */
    public String getWSUId() {
        return id;
    }

    /** {@inheritDoc} */
    public void setWSUId(String newId) {
        String oldID = id;
        id = prepareForAssignment(id, newId);
        registerOwnID(oldID, id);
        manageQualifiedAttributeNamespace(IdBearing.WSU_ID_ATTR_NAME, id != null);
    }

    /** {@inheritDoc} */
    public AttributeMap getUnknownAttributes() {
        return unknownAttributes;
    }
    
    /** {@inheritDoc} */
    public DateTimeFormatter getDateTimeFormatter() {
        return formatter;
    }

    /** {@inheritDoc} */
    public void setDateTimeFormatter(DateTimeFormatter newFormatter) {
        if (newFormatter == null) {
            throw new IllegalArgumentException("The specified DateTimeFormatter may not be null");
        }
        formatter = newFormatter;
        // Explicitly cause the cached string representation to be reformatted when the formatter is changed
        setDateTime(getDateTime());
    }

}