Example usage for org.jfree.data.xy TableXYDataset getItemCount

Introduction

In this page you can find the example usage for org.jfree.data.xy TableXYDataset getItemCount.

Prototype

public int getItemCount();

Source Link

Document

Returns the number of items every series.

Usage

From source file:de.saring.util.gui.jfreechart.StackedRenderer.java

/**
 * Returns the range of values the renderer requires to display all the
 * items from the specified dataset.//from ww  w  .  j a v a2s .co m
 *
 * @param dataset the dataset (<code>null</code> permitted).
 * @return The range (or <code>null</code> if the dataset is
 *         <code>null</code> or empty).
 */
@Override
public Range findRangeBounds(XYDataset dataset) {
    if (dataset == null) {
        return null;
    }
    double min = Double.POSITIVE_INFINITY;
    double max = Double.NEGATIVE_INFINITY;
    TableXYDataset d = (TableXYDataset) dataset;
    int itemCount = d.getItemCount();
    for (int i = 0; i < itemCount; i++) {
        double[] stackValues = getStackValues((TableXYDataset) dataset, d.getSeriesCount(), i);
        min = Math.min(min, stackValues[0]);
        max = Math.max(max, stackValues[1]);
    }
    if (min == Double.POSITIVE_INFINITY) {
        return null;
    }
    return new Range(min, max);
}

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From source file:org.jfree.data.general.DatasetUtils.java

/**
 * Returns the minimum and maximum values for the dataset's range,
 * assuming that the series are stacked, using the specified base value.
 *
 * @param dataset  the dataset ({@code null} not permitted).
 * @param base  the base value./*from ww w.ja  va 2 s.c  o m*/
 *
 * @return The range ({@code null} if the dataset contains no values).
 */
public static Range findStackedRangeBounds(TableXYDataset dataset, double base) {
    Args.nullNotPermitted(dataset, "dataset");
    double minimum = base;
    double maximum = base;
    for (int itemNo = 0; itemNo < dataset.getItemCount(); itemNo++) {
        double positive = base;
        double negative = base;
        int seriesCount = dataset.getSeriesCount();
        for (int seriesNo = 0; seriesNo < seriesCount; seriesNo++) {
            double y = dataset.getYValue(seriesNo, itemNo);
            if (!Double.isNaN(y)) {
                if (y > 0.0) {
                    positive += y;
                } else {
                    negative += y;
                }
            }
        }
        if (positive > maximum) {
            maximum = positive;
        }
        if (negative < minimum) {
            minimum = negative;
        }
    }
    if (minimum <= maximum) {
        return new Range(minimum, maximum);
    } else {
        return null;
    }
}

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From source file:org.jfree.data.general.DatasetUtilities.java

/**
 * Returns the minimum and maximum values for the dataset's range,
 * assuming that the series are stacked, using the specified base value.
 *
 * @param dataset  the dataset (<code>null</code> not permitted).
 * @param base  the base value.//from   www  .j av  a2 s  .c  o  m
 *
 * @return The range (<code>null</code> if the dataset contains no values).
 */
public static Range findStackedRangeBounds(TableXYDataset dataset, double base) {
    ParamChecks.nullNotPermitted(dataset, "dataset");
    double minimum = base;
    double maximum = base;
    for (int itemNo = 0; itemNo < dataset.getItemCount(); itemNo++) {
        double positive = base;
        double negative = base;
        int seriesCount = dataset.getSeriesCount();
        for (int seriesNo = 0; seriesNo < seriesCount; seriesNo++) {
            double y = dataset.getYValue(seriesNo, itemNo);
            if (!Double.isNaN(y)) {
                if (y > 0.0) {
                    positive += y;
                } else {
                    negative += y;
                }
            }
        }
        if (positive > maximum) {
            maximum = positive;
        }
        if (negative < minimum) {
            minimum = negative;
        }
    }
    if (minimum <= maximum) {
        return new Range(minimum, maximum);
    } else {
        return null;
    }
}

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