Example usage for org.joda.time DateTimeUtils getInstantChronology

Introduction

In this page you can find the example usage for org.joda.time DateTimeUtils getInstantChronology.

Prototype

public static final Chronology getInstantChronology(ReadableInstant instant) 

Source Link

Document

Gets the chronology from the specified instant object handling null.

Usage

From source file:org.apereo.portal.events.aggr.AggregationInterval.java

License:Apache License

/**
 * Determine the number of intervals between the start and end dates
 *
 * @param start Start, inclusive/*from  ww  w .j  a va  2s.  c o  m*/
 * @param end End, exclusive
 * @return Number of intervals between start and end
 */
public int determineIntervalsBetween(ReadableInstant start, ReadableInstant end) {
    if (!this.isSupportsDetermination()) {
        throw new IllegalArgumentException("Cannot compute intervals between for " + this + " please use "
                + AggregationIntervalHelper.class);
    }

    final DateTimeFieldType dtft;
    final double ratio;
    switch (this) {
    case FIVE_MINUTE: {
        dtft = MINUTE.getDateTimeFieldType();
        ratio = 5;
        break;
    }
    default: {
        dtft = dateTimeFieldType;
        ratio = 1;
    }
    }

    final DurationFieldType durationType = dtft.getDurationType();
    final Chronology chrono = DateTimeUtils.getInstantChronology(start);
    return (int) Math
            .round(durationType.getField(chrono).getDifference(end.getMillis(), start.getMillis()) / ratio);
}

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