/*
 * Conditions Of Use
 *
 * This software was developed by employees of the National Institute of
 * Standards and Technology (NIST), an agency of the Federal Government.
 * Pursuant to title 15 Untied States Code Section 105, works of NIST
 * employees are not subject to copyright protection in the United States
 * and are considered to be in the public domain.  As a result, a formal
 * license is not needed to use the software.
 *
 * This software is provided by NIST as a service and is expressly
 * provided "AS IS."  NIST MAKES NO WARRANTY OF ANY KIND, EXPRESS, IMPLIED
 * OR STATUTORY, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTY OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT
 * AND DATA ACCURACY.  NIST does not warrant or make any representations
 * regarding the use of the software or the results thereof, including but
 * not limited to the correctness, accuracy, reliability or usefulness of
 * the software.
 *
 * Permission to use this software is contingent upon your acceptance
 * of the terms of this agreement
 *
 * .
 *
 */
package gov.nist.javax.sdp;

import gov.nist.javax.sdp.fields.*;
import javax.sdp.*;
import java.util.*;

/**
 * Implementation of Time Description
 *
 * @version 1.2
 *
 * @author Olivier Deruelle
 * @author M. Ranganathan  <br/>
 *
 *
 *
 */
public class TimeDescriptionImpl implements TimeDescription {

    private TimeField timeImpl;

    private Vector repeatList;

    /** Creates new TimeDescriptionImpl */
    public TimeDescriptionImpl() {
        timeImpl = new TimeField();
        repeatList = new Vector();

    }

    /**
     * constructor
     *
     * @param timeField
     *            time field to create this descrition from
     */
    public TimeDescriptionImpl(TimeField timeField) {
        this.timeImpl = timeField;
        repeatList = new Vector();
    }

    /**
     * Returns the Time field.
     *
     * @return Time
     */
    public Time getTime() {
        return timeImpl;
    }

    /**
     * Sets the Time field.
     *
     * @param timeField
     *            Time to set
     * @throws SdpException
     *             if the time is null
     */
    public void setTime(Time timeField) throws SdpException {
        if (timeField == null) {
            throw new SdpException("The parameter is null");
        } else {
            if (timeField instanceof TimeField) {
                this.timeImpl = (TimeField) timeField;
            } else
                throw new SdpException(
                        "The parameter is not an instance of TimeField");
        }
    }

    /**
     * Returns the list of repeat times (r= fields) specified in the
     * SessionDescription.
     *
     * @param create
     *            boolean to set
     * @return Vector
     */
    public Vector getRepeatTimes(boolean create) {
        return this.repeatList;
    }

    /**
     * Returns the list of repeat times (r= fields) specified in the
     * SessionDescription.
     *
     * @param repeatTimes
     *            Vector to set
     * @throws SdpException
     *             if the parameter is null
     */
    public void setRepeatTimes(Vector repeatTimes) throws SdpException {
        this.repeatList = repeatTimes;
    }

    /**
     * Add a repeat field.
     *
     * @param repeatField --
     *            repeat field to add.
     */
    public void addRepeatField(RepeatField repeatField) {
        if (repeatField == null)
            throw new NullPointerException("null repeatField");
        this.repeatList.add(repeatField);
    }

    public String toString() {
        String retval = timeImpl.encode();
        for (int i = 0; i < this.repeatList.size(); i++) {
            RepeatField repeatField = (RepeatField) this.repeatList
                    .elementAt(i);
            retval += repeatField.encode();
        }
        return retval;
    }

}