Example usage for org.jfree.chart.util ArrayUtils hasDuplicateItems

Introduction

In this page you can find the example usage for org.jfree.chart.util ArrayUtils hasDuplicateItems.

Prototype

public static boolean hasDuplicateItems(Object[] array) 

Source Link

Document

Returns true if any two items in the array are equal to one another.

Usage

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

/**
 * Creates a {@link CategoryDataset} that contains a copy of the data in
 * an array (instances of {@code double} are created to represent the
 * data items)./* ww w  .ja v a2 s .  com*/
 * <p>
 * Row and column keys are taken from the supplied arrays.
 *
 * @param rowKeys  the row keys ({@code null} not permitted).
 * @param columnKeys  the column keys ({@code null} not permitted).
 * @param data  the data.
 *
 * @return The dataset.
 */
public static CategoryDataset createCategoryDataset(Comparable[] rowKeys, Comparable[] columnKeys,
        double[][] data) {

    Args.nullNotPermitted(rowKeys, "rowKeys");
    Args.nullNotPermitted(columnKeys, "columnKeys");
    if (ArrayUtils.hasDuplicateItems(rowKeys)) {
        throw new IllegalArgumentException("Duplicate items in 'rowKeys'.");
    }
    if (ArrayUtils.hasDuplicateItems(columnKeys)) {
        throw new IllegalArgumentException("Duplicate items in 'columnKeys'.");
    }
    if (rowKeys.length != data.length) {
        throw new IllegalArgumentException(
                "The number of row keys does not match the number of rows in " + "the data array.");
    }
    int columnCount = 0;
    for (int r = 0; r < data.length; r++) {
        columnCount = Math.max(columnCount, data[r].length);
    }
    if (columnKeys.length != columnCount) {
        throw new IllegalArgumentException(
                "The number of column keys does not match the number of " + "columns in the data array.");
    }

    // now do the work...
    DefaultCategoryDataset result = new DefaultCategoryDataset();
    for (int r = 0; r < data.length; r++) {
        Comparable rowKey = rowKeys[r];
        for (int c = 0; c < data[r].length; c++) {
            Comparable columnKey = columnKeys[c];
            result.addValue(new Double(data[r][c]), rowKey, columnKey);
        }
    }
    return result;

}

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