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DynamicSynchronousXYChartModel.java

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package org.netbeans.lib.profiler.ui.charts;

import java.awt.Color;
import java.util.Iterator;
import java.util.Vector;


/**
 *
 * @author Jiri Sedlacek
 */
00052 public class DynamicSynchronousXYChartModel extends AbstractSynchronousXYChartModel {
    //~ Instance fields ----------------------------------------------------------------------------------------------------------

    protected long[] maxYValues;
    protected long[] minYValues;
    protected Color[] seriesColors;
    protected String[] seriesNames;
    protected long[] xValues;
    protected long[][] yValues;
    protected int itemCount = 0;
    protected int seriesCount = 0;
    protected long maxXValue = 0;
    protected long minXValue = 0;
    private int arrayBufferSize = 100;
    private int currentArraySize;

    //~ Methods ------------------------------------------------------------------------------------------------------------------

    public void setArrayBufferSize(int arrayBufferSize) {
        this.arrayBufferSize = arrayBufferSize;
        checkArraySize();
    }

    public int getArrayBufferSize() {
        return arrayBufferSize;
    }

    public int getItemCount() {
        return itemCount;
    }

    // TODO: will be moved to chart axis definition
    public long getMaxDisplayYValue(int seriesIndex) {
        return getMaxYValue(seriesIndex);
    }

    public long getMaxXValue() {
        return maxXValue;
    }

    public long getMaxYValue(int seriesIndex) {
        return maxYValues[seriesIndex];
    }

    // TODO: will be moved to chart axis definition
    public long getMinDisplayYValue(int seriesIndex) {
        return 0;
    }

    public long getMinXValue() {
        return minXValue;
    }

    public long getMinYValue(int seriesIndex) {
        return minYValues[seriesIndex];
    }

    public Color getSeriesColor(int seriesIndex) {
        return seriesColors[seriesIndex];
    }

    // --- Abstract SynchronousXYChartModel --------------------------------------
    public int getSeriesCount() {
        return seriesCount;
    }

    public String getSeriesName(int seriesIndex) {
        return seriesNames[seriesIndex];
    }

    public long getXValue(int itemIndex) {
        return xValues[itemIndex];
    }

    public long getYValue(int itemIndex, int seriesIndex) {
        return yValues[itemIndex][seriesIndex];
    }

    public void addItemValues(long xValue, long[] yValues) {
        // is array extension needed?
        checkArraySize();

        // first data arrived, initialize min/max values
        if (itemCount == 0) {
            minXValue = xValue;
            maxXValue = xValue;

            for (int i = 0; i < seriesCount; i++) {
                minYValues[i] = yValues[i];
                maxYValues[i] = yValues[i];
            }
        } else {
            // check "timeline" consistency
            if (xValues[itemCount - 1] >= xValue) {
                throw new RuntimeException("New x-value not greater than previous x-value."); // NOI18N
            }

            // check min/max for x value
            maxXValue = xValue; // new values are always greater

            // check min/max for y values
            for (int i = 0; i < seriesCount; i++) {
                minYValues[i] = Math.min(minYValues[i], yValues[i]);
                maxYValues[i] = Math.max(maxYValues[i], yValues[i]);
            }
        }

        // add new x value
        xValues[itemCount] = xValue;

        // add new y values
        this.yValues[itemCount] = yValues;

        // increment item counter
        itemCount++;

        fireChartDataChanged();
    }

    public void setupModel(String[] seriesNames, Color[] seriesColors) {
        this.seriesNames = seriesNames;
        this.seriesColors = seriesColors;

        if (seriesNames.length != seriesColors.length) {
            seriesCount = 0;
            throw new RuntimeException("Counts of series names and series colors don't match."); // NOI18N
        } else {
            seriesCount = seriesNames.length;
        }

        itemCount = 0;
        currentArraySize = arrayBufferSize;

        xValues = new long[arrayBufferSize];
        yValues = new long[arrayBufferSize][];

        minXValue = 0;
        maxXValue = 0;

        minYValues = new long[seriesCount];
        maxYValues = new long[seriesCount];
    }

    // --- Private Implementation ------------------------------------------------
    private void checkArraySize() {
        // array extension is needed
        if (currentArraySize == itemCount) {
            // extend array for xValues (1-dimensional)
            xValues = extendArray(xValues, arrayBufferSize);

            // extend array for yValues (2-dimensional)
            yValues = extendArray(yValues, arrayBufferSize);

            // extend array for min/max yValues (1-dimensional)
            minYValues = extendArray(minYValues, arrayBufferSize);
            maxYValues = extendArray(maxYValues, arrayBufferSize);

            // update current array size
            currentArraySize += arrayBufferSize;
        }
    }

    // extends 1-dimensional array
    private static long[] extendArray(long[] array, int extraLength) {
        int originalLength = array.length;
        long[] newArray = new long[originalLength + extraLength];
        System.arraycopy(array, 0, newArray, 0, originalLength);

        return newArray;
    }

    // extends 2-dimensional array
    private static long[][] extendArray(long[][] array, int extraLength) {
        int originalLength = array.length;
        long[][] newArray = new long[originalLength + extraLength][];
        System.arraycopy(array, 0, newArray, 0, originalLength);

        return newArray;
    }
}

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