<?xml version="1.0" encoding="UTF-8"?>
<test-data
    xmlns="http://pmd.sourceforge.net/rule-tests"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://pmd.sourceforge.net/rule-tests http://pmd.sourceforge.net/rule-tests_1_0_0.xsd">

    <test-code>
        <description>Not OK! Has overridden getInstance() methods</description>
        <expected-problems>1</expected-problems>
        <expected-linenumbers>1</expected-linenumbers>
        <code><![CDATA[
public class Singleton {

    private static Singleton singleton = new Singleton();

    private Singleton() { }

    public static Singleton getInstance() {
        return singleton;
    }

    public static Singleton getInstance(Object obj) {
        Singleton singleton = (Singleton) obj;
        return singleton;
    }
}
        ]]></code>
    </test-code>

    <test-code>
        <description>OK! Has only one Singleton</description>
        <expected-problems>0</expected-problems>
        <code><![CDATA[
public class Singleton {
    private static Singleton instance = null;

    public static Singleton getInstance() {
        synchronized(Singleton.class) {
            if (instance == null) {
                instance = new Singleton();
            }
        }
        return instance;
    }
}
        ]]></code>
    </test-code>

    <test-code>
        <description>OK! Has two different getInstance() in different classes</description>
        <expected-problems>0</expected-problems>
        <code>
            <![CDATA[
final class Siblings {
    static class Inner1 {
        static Inner1 getInstance() { return null; }
    }
    static class Inner2 {
        static Inner2 getInstance() { return null; }
    }
}
        ]]></code>
    </test-code>
</test-data>
