timeperiodvaluescollection.java

来自「JfreeChart 常用图表例子」· Java 代码 · 共 488 行 · 第 1/2 页

     * <P>
     * This method is provided for convenience.
     *
     * @param series  the index of the series of interest (zero-based).
     *
     * @return The number of items in the specified series.
     */
    public int getItemCount(int series) {
        return getSeries(series).getItemCount();
    }

    /**
     * Returns the x-value for the specified series and item.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The x-value for the specified series and item.
     */
    public Number getX(int series, int item) {
        TimePeriodValues ts = (TimePeriodValues) this.data.get(series);
        TimePeriodValue dp = ts.getDataItem(item);
        TimePeriod period = dp.getPeriod();
        return new Long(getX(period));
    }

    /**
     * Returns the x-value for a time period.
     *
     * @param period  the time period.
     *
     * @return The x-value.
     */
    private long getX(TimePeriod period) {

        if (this.xPosition == TimePeriodAnchor.START) {
            return period.getStart().getTime();
        }
        else if (this.xPosition == TimePeriodAnchor.MIDDLE) {
            return period.getStart().getTime() 
                / 2 + period.getEnd().getTime() / 2;
        }
        else if (this.xPosition == TimePeriodAnchor.END) {
            return period.getEnd().getTime();
        }
        else {
            throw new IllegalStateException("TimePeriodAnchor unknown.");
        }

    }

    /**
     * Returns the starting X value for the specified series and item.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The starting X value for the specified series and item.
     */
    public Number getStartX(int series, int item) {
        TimePeriodValues ts = (TimePeriodValues) this.data.get(series);
        TimePeriodValue dp = ts.getDataItem(item);
        return new Long(dp.getPeriod().getStart().getTime());
    }

    /**
     * Returns the ending X value for the specified series and item.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The ending X value for the specified series and item.
     */
    public Number getEndX(int series, int item) {
        TimePeriodValues ts = (TimePeriodValues) this.data.get(series);
        TimePeriodValue dp = ts.getDataItem(item);
        return new Long(dp.getPeriod().getEnd().getTime());
    }

    /**
     * Returns the y-value for the specified series and item.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The y-value for the specified series and item.
     */
    public Number getY(int series, int item) {
        TimePeriodValues ts = (TimePeriodValues) this.data.get(series);
        TimePeriodValue dp = ts.getDataItem(item);
        return dp.getValue();
    }

    /**
     * Returns the starting Y value for the specified series and item.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The starting Y value for the specified series and item.
     */
    public Number getStartY(int series, int item) {
        return getY(series, item);
    }

    /**
     * Returns the ending Y value for the specified series and item.
     *
     * @param series  the series (zero-based index).
     * @param item  the item (zero-based index).
     *
     * @return The ending Y value for the specified series and item.
     */
    public Number getEndY(int series, int item) {
        return getY(series, item);
    }

    /**
     * Returns the minimum x-value in the dataset.
     *
     * @param includeInterval  a flag that determines whether or not the
     *                         x-interval is taken into account.
     * 
     * @return The minimum value.
     */
    public double getDomainLowerBound(boolean includeInterval) {
        double result = Double.NaN;
        Range r = getDomainBounds(includeInterval);
        if (r != null) {
            result = r.getLowerBound();
        }
        return result;
    }

    /**
     * Returns the maximum x-value in the dataset.
     *
     * @param includeInterval  a flag that determines whether or not the
     *                         x-interval is taken into account.
     * 
     * @return The maximum value.
     */
    public double getDomainUpperBound(boolean includeInterval) {
        double result = Double.NaN;
        Range r = getDomainBounds(includeInterval);
        if (r != null) {
            result = r.getUpperBound();
        }
        return result;
    }

    /**
     * Returns the range of the values in this dataset's domain.
     *
     * @param includeInterval  a flag that determines whether or not the
     *                         x-interval is taken into account.
     * 
     * @return The range.
     */
    public Range getDomainBounds(boolean includeInterval) {
        Range result = null;
        Range temp = null;
        Iterator iterator = this.data.iterator();
        while (iterator.hasNext()) {
            TimePeriodValues series = (TimePeriodValues) iterator.next();
            int count = series.getItemCount();
            if (count > 0) {
                TimePeriod start = series.getTimePeriod(
                    series.getMinStartIndex()
                );
                TimePeriod end = series.getTimePeriod(series.getMaxEndIndex());
                if (this.domainIsPointsInTime) {
                    if (this.xPosition == TimePeriodAnchor.START) {
                        TimePeriod maxStart = series.getTimePeriod(
                            series.getMaxStartIndex()
                        );
                        temp = new Range(
                            start.getStart().getTime(), 
                            maxStart.getStart().getTime()
                        );
                    }
                    else if (this.xPosition == TimePeriodAnchor.MIDDLE) {
                        TimePeriod minMiddle = series.getTimePeriod(
                            series.getMinMiddleIndex()
                        );
                        long s1 = minMiddle.getStart().getTime();
                        long e1 = minMiddle.getEnd().getTime();
                        TimePeriod maxMiddle = series.getTimePeriod(
                            series.getMaxMiddleIndex()
                        );
                        long s2 = maxMiddle.getStart().getTime();
                        long e2 = maxMiddle.getEnd().getTime();
                        temp = new Range(
                            s1 + (e1 - s1) / 2, s2 + (e2 - s2) / 2
                        );
                    }
                    else if (this.xPosition == TimePeriodAnchor.END) {
                        TimePeriod minEnd = series.getTimePeriod(
                            series.getMinEndIndex()
                        );
                        temp = new Range(
                            minEnd.getEnd().getTime(), end.getEnd().getTime()
                        );
                    }
                }
                else {
                    temp = new Range(
                        start.getStart().getTime(), end.getEnd().getTime()
                    );
                }
                result = Range.combine(result, temp);
            }
        }
        return result;
    }

    /**
     * Tests this instance for equality with an arbitrary object.
     * 
     * @param obj  the object (<code>null</code> permitted).
     * 
     * @return A boolean.
     */
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (!(obj instanceof TimePeriodValuesCollection)) {
            return false;   
        }
        TimePeriodValuesCollection that = (TimePeriodValuesCollection) obj;
        if (this.domainIsPointsInTime != that.domainIsPointsInTime) {
            return false;   
        }
        if (this.xPosition != that.xPosition) {
            return false;   
        }
        if (!ObjectUtilities.equal(this.data, that.data)) {
            return false;
        }
        return true;   
    }
}