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package com.sun.org.apache.xerces.internal.jaxp.datatype;

import java.math.BigInteger;

import java.math.BigDecimal;

import javax.xml.datatype.DatatypeConstants;

/**

 * <p>Represent a subtype <code>xdt:dayTimeDuration</code> of a <code>Duration</code>

 * as specified in <a href="http://www.w3.org/TR/xpath-datamodel#dayTimeDuration">

 *   XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration</a>.</p>

 *

 *

 * <p>The DurationYearMonth object represents a period of Gregorian time,

 * with a lexical representation, "<em>PnDTnHnMnS</em>" that contains only year and month components.

 * </p>

 *

 *

 * @author Vikram Aroskar

 * @see XMLGregorianCalendar#add(Duration)

 */

class DurationDayTimeImpl

        extends DurationImpl {

    private static final long serialVersionUID = 844792794952655204L;

    public DurationDayTimeImpl(

        boolean isPositive,

        BigInteger days,

        BigInteger hours,

        BigInteger minutes,

        BigDecimal seconds) {

        super(isPositive, null, null, days, hours, minutes, seconds);

        convertToCanonicalDayTime();

    }

    public DurationDayTimeImpl(

        boolean isPositive,

        int days,

        int hours,

        int minutes,

        int seconds) {

        this(

            isPositive,

            wrap(days),

            wrap(hours),

            wrap(minutes),

            (seconds != DatatypeConstants.FIELD_UNDEFINED ? new BigDecimal(String.valueOf(seconds)) : null));

    }

        /**

         * <p>Construct a <code>Duration</code> of type <code>xdt:dayTimeDuration</code> by parsing its <code>String</code> representation,

         * "<em>PnDTnHnMnS</em>", <a href="http://www.w3.org/TR/xpath-datamodel#dayTimeDuration">

         *   XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration</a>.</p>

         *

         * <p>The datatype <code>xdt:dayTimeDuration</code> is a subtype of <code>xs:duration</code>

         * whose lexical representation contains only day, hour, minute, and second components.

         * This datatype resides in the namespace <code>http://www.w3.org/2003/11/xpath-datatypes</code>.</p>

         *

     * <p>All four values are set and availabe from the created {@link Duration}</p>

         *

     * <p>The XML Schema specification states that values can be of an arbitrary size.

     * Implementations may chose not to or be incapable of supporting arbitrarily large and/or small values.

     * An {@link UnsupportedOperationException} will be thrown with a message indicating implementation limits

     * if implementation capacities are exceeded.</p>

     *

         * @param lexicalRepresentation Lexical representation of a duration.

         *

         * @throws IllegalArgumentException If <code>lexicalRepresentation</code> is not a valid representation of a <code>Duration</code> expressed only in terms of days and time.

         * @throws UnsupportedOperationException If implementation cannot support requested values.

         * @throws NullPointerException If <code>lexicalRepresentation</code> is <code>null</code>.

         */

    protected DurationDayTimeImpl(String lexicalRepresentation) {

        super(lexicalRepresentation);

        if (getYears() > 0 || getMonths() > 0) {

            throw new IllegalArgumentException(

                    "Trying to create an xdt:dayTimeDuration with an invalid"

                    + " lexical representation of \"" + lexicalRepresentation

                    + "\", data model requires a format PnDTnHnMnS.");

        }

        convertToCanonicalDayTime();

    }

        /**

         * <p>Create a <code>Duration</code> of type <code>xdt:dayTimeDuration</code> using the specified milliseconds as defined in

         * <a href="http://www.w3.org/TR/xpath-datamodel#dayTimeDuration">

         *   XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration</a>.</p>

         *

         * <p>The datatype <code>xdt:dayTimeDuration</code> is a subtype of <code>xs:duration</code>

         * whose lexical representation contains only day, hour, minute, and second components.

         * This datatype resides in the namespace <code>http://www.w3.org/2003/11/xpath-datatypes</code>.</p>

         *

     * <p>All four values are set by computing their values from the specified milliseconds

     * and are availabe using the <code>get</code> methods of  the created {@link Duration}.

     * The values conform to and are defined by:</p>

     * <ul>

     *   <li>ISO 8601:2000(E) Section 5.5.3.2 Alternative format</li>

     *   <li><a href="http://www.w3.org/TR/xmlschema-2/#isoformats">

     *     W3C XML Schema 1.0 Part 2, Appendix D, ISO 8601 Date and Time Formats</a>

     *   </li>

     *   <li>{@link XMLGregorianCalendar}  Date/Time Datatype Field Mapping Between XML Schema 1.0 and Java Representation</li>

     * </ul>

         *

         * <p>The default start instance is defined by {@link GregorianCalendar}'s use of the start of the epoch: i.e.,

         * {@link java.util.Calendar#YEAR} = 1970,

         * {@link java.util.Calendar#MONTH} = {@link java.util.Calendar#JANUARY},

         * {@link java.util.Calendar#DATE} = 1, etc.

         * This is important as there are variations in the Gregorian Calendar,

         * e.g. leap years have different days in the month = {@link java.util.Calendar#FEBRUARY}

         * so the result of {@link Duration#getDays()} can be influenced.</p>

         *

     * <p>Any remaining milliseconds after determining the day, hour, minute and second are discarded.</p>

     *

     * @param durationInMilliseconds Milliseconds of <code>Duration</code> to create.

     *

     * @return New <code>Duration</code> created with the specified <code>durationInMilliseconds</code>.

     *

     * @see <a href="http://www.w3.org/TR/xpath-datamodel#dayTimeDuration">

     *   XQuery 1.0 and XPath 2.0 Data Model, xdt:dayTimeDuration</a>

     */

    protected DurationDayTimeImpl(final long durationInMilliseconds) {

            super(durationInMilliseconds);

            convertToCanonicalDayTime();

            // only day, hour, minute, and second should have values

            years = null;

            months = null;

    }

    /**

     * The value space of xs:dayTimeDuration is the set of fractional second values.

     * @return fractional second values

     */

    public float getValue() {

        float sec = (seconds==null)?0:seconds.floatValue();

        return (((((getDays() * 24) +

                    getHours()) * 60) +

                    getMinutes())*60) +

                    sec;

    }

    private void convertToCanonicalDayTime() {

        while (getSeconds() >= 60)

        {

            seconds = seconds.subtract(BigDecimal.valueOf(60));

            minutes = BigInteger.valueOf((long) getMinutes()).add(BigInteger.ONE);

        }

        while (getMinutes() >= 60)

        {

            minutes = minutes.subtract(BigInteger.valueOf(60));

            hours = BigInteger.valueOf((long) getHours()).add(BigInteger.ONE);

        }

        while (getHours() >= 24)

        {

            hours = hours.subtract(BigInteger.valueOf(24));

            days = BigInteger.valueOf((long) getDays()).add(BigInteger.ONE);

        }

    }

}