import java.io.*;

import java.util.*;

import java.util.concurrent.*;

import java.util.concurrent.atomic.*;

public class Get {

private static void realMain(String[] args) throws Throwable {

testMap(new Hashtable<Character,Boolean>());

testMap(new HashMap<Character,Boolean>());

testMap(new IdentityHashMap<Character,Boolean>());

testMap(new LinkedHashMap<Character,Boolean>());

testMap(new ConcurrentHashMap<Character,Boolean>());

testMap(new WeakHashMap<Character,Boolean>());

testMap(new TreeMap<Character,Boolean>());

testMap(new ConcurrentSkipListMap<Character,Boolean>());

}

private static void put(Map<Character,Boolean> m,

Character key, Boolean value,

Boolean oldValue) {

if (oldValue != null) {

check("containsValue(oldValue)", m.containsValue(oldValue));

check("values.contains(oldValue)", m.values().contains(oldValue));

}

equal(m.put(key, value), oldValue);

equal(m.get(key), value);

check("containsKey", m.containsKey(key));

check("keySet.contains", m.keySet().contains(key));

check("containsValue", m.containsValue(value));

check("values.contains", m.values().contains(value));

check("!isEmpty", ! m.isEmpty());

}

private static void testMap(Map<Character,Boolean> m) {

// We verify following assertions in get(Object) method javadocs

boolean permitsNullKeys = (! (m instanceof ConcurrentMap ||

m instanceof Hashtable ||

m instanceof SortedMap));

boolean permitsNullValues = (! (m instanceof ConcurrentMap ||

m instanceof Hashtable));

boolean usesIdentity = m instanceof IdentityHashMap;

System.err.println(m.getClass());

put(m, 'A', true, null);

put(m, 'A', false, true); // Guaranteed identical by JLS

put(m, 'B', true, null);

put(m, new Character('A'), false, usesIdentity ? null : false);

if (permitsNullKeys) {

try {

put(m, null, true, null);

put(m, null, false, true);

}

catch (Throwable t) { unexpected(m.getClass().getName(), t); }

} else {

try { m.get(null); fail(m.getClass().getName() + " did not reject null key"); }

catch (NullPointerException e) {}

catch (Throwable t) { unexpected(m.getClass().getName(), t); }

try { m.put(null, true); fail(m.getClass().getName() + " did not reject null key"); }

catch (NullPointerException e) {}

catch (Throwable t) { unexpected(m.getClass().getName(), t); }

}

if (permitsNullValues) {

try {

put(m, 'C', null, null);

put(m, 'C', true, null);

put(m, 'C', null, true);

}

catch (Throwable t) { unexpected(m.getClass().getName(), t); }

} else {

try { m.put('A', null); fail(m.getClass().getName() + " did not reject null key"); }

catch (NullPointerException e) {}

catch (Throwable t) { unexpected(m.getClass().getName(), t); }

try { m.put('C', null); fail(m.getClass().getName() + " did not reject null key"); }

catch (NullPointerException e) {}

catch (Throwable t) { unexpected(m.getClass().getName(), t); }

}

}

//--------------------- Infrastructure ---------------------------

static volatile int passed = 0, failed = 0;

static void pass() { passed++; }

static void fail() { failed++; (new Error("Failure")).printStackTrace(System.err); }

static void fail(String msg) { failed++; (new Error("Failure: " + msg)).printStackTrace(System.err); }

static void unexpected(String msg, Throwable t) { System.err.println("Unexpected: " + msg); unexpected(t); }

static void unexpected(Throwable t) { failed++; t.printStackTrace(System.err); }

static void check(boolean cond) { if (cond) pass(); else fail(); }

static void check(String desc, boolean cond) { if (cond) pass(); else fail(desc); }

static void equal(Object x, Object y) {

if(Objects.equals(x,y)) pass(); else fail(x + " not equal to " + y);

}

public static void main(String[] args) throws Throwable {

try { realMain(args); } catch (Throwable t) { unexpected(t); }

System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);

if (failed > 0) throw new Error("Some tests failed");

}

}