Example usage for org.jfree.data KeyToGroupMap getKeyCount

Introduction

In this page you can find the example usage for org.jfree.data KeyToGroupMap getKeyCount.

Prototype

public int getKeyCount(Comparable group) 

Source Link

Document

Returns the number of keys mapped to the specified group.

Usage

From source file:org.jfree.data.KeyToGroupMapTest.java

/**
 * Tests that the getKeyCount() method returns the correct values under
 * various circumstances.//from   w ww  .ja  va  2  s  .  c om
 */
@Test
public void testKeyCount() {
    KeyToGroupMap m1 = new KeyToGroupMap("Default Group");

    // a new map always has 1 group (the default group)
    assertEquals(0, m1.getKeyCount("Default Group"));

    // simple case
    m1.mapKeyToGroup("K1", "G1");
    assertEquals(1, m1.getKeyCount("G1"));
    m1.mapKeyToGroup("K1", null);
    assertEquals(0, m1.getKeyCount("G1"));

    // if there is an explicit mapping to the default group, it is counted
    m1.mapKeyToGroup("K2", "Default Group");
    assertEquals(1, m1.getKeyCount("Default Group"));

    // complicate things a little...
    m1.mapKeyToGroup("K3", "Default Group");
    m1.mapKeyToGroup("K4", "G2");
    m1.mapKeyToGroup("K5", "G2");
    m1.mapKeyToGroup("K6", "Default Group");
    assertEquals(3, m1.getKeyCount("Default Group"));
    assertEquals(2, m1.getKeyCount("G2"));

    // now overwrite group "G2"...
    m1.mapKeyToGroup("K4", "G1");
    m1.mapKeyToGroup("K5", "G1");
    assertEquals(2, m1.getKeyCount("G1"));
    assertEquals(0, m1.getKeyCount("G2"));
}

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