CompactAbstractMap - two fields less than AbstractMap [i.e. NO fields at all] [1031043]

asclass CompactAbstractMap<K, V> implements Map<K, V> {
  public int size() {
      return entrySet().size();
  }

  public boolean isEmpty() {
      return size() == 0;
  }

  public boolean containsValue(Object value) {
      Iterator<Entry<K, V>> i = entrySet().iterator();
      if (value == null) {
          while (i.hasNext()) {
              Entry<K, V> e = i.next();
              if (e.getValue() == null)
                  return true;
          }
      } else {
          while (i.hasNext()) {
              Entry<K, V> e = i.next();
              if (value.equals(e.getValue()))
                  return true;
          }
      }
      return false;
  }

  public boolean containsKey(Object key) {
      Iterator<Entry<K, V>> i = entrySet().iterator();
      if (key == null) {
          while (i.hasNext()) {
              Entry<K, V> e = i.next();
              if (e.getKey() == null)
                  return true;
          }
      } else {
          while (i.hasNext()) {
              Entry<K, V> e = i.next();
              if (key.equals(e.getKey()))
                  return true;
          }
      }
      return false;
  }

  public V get(Object key) {
      Iterator<Entry<K, V>> i = entrySet().iterator();
      if (key == null) {
          while (i.hasNext()) {
              Entry<K, V> e = i.next();
              if (e.getKey() == null)
                  return e.getValue();
          }
      } else {
          while (i.hasNext()) {
              Entry<K, V> e = i.next();
              if (key.equals(e.getKey()))
                  return e.getValue();
          }
      }
      return null;
  }

  public V put(K key, V value) {
      throw new UnsupportedOperationException();
  }

  public V remove(Object key) {
      Iterator<Entry<K, V>> i = entrySet().iterator();
      Entry<K, V> correctEntry = null;
      if (key == null) {
          while (correctEntry == null && i.hasNext()) {
              Entry<K, V> e = i.next();
              if (e.getKey() == null)
                  correctEntry = e;
          }
      } else {
          while (correctEntry == null && i.hasNext()) {
              Entry<K, V> e = i.next();
              if (key.equals(e.getKey()))
                  correctEntry = e;
          }
      }

      V oldValue = null;
      if (correctEntry != null) {
          oldValue = correctEntry.getValue();
          i.remove();
      }
      return oldValue;
  }

  public void putAll(Map<? extends K, ? extends V> m) {
      for (Entry<? extends K, ? extends V> e : m.entrySet())
          put(e.getKey(), e.getValue());
  }

  public void clear() {
      entrySet().clear();
  }

  public Set<K> keySet() {
      return new AbstractSet<K>() {
          public Iterator<K> iterator() {
              return new Iterator<K>() {
                  private Iterator<Entry<K, V>> i = entrySet().iterator();

                  public boolean hasNext() {
                      return i.hasNext();
                  }

                  public K next() {
                      return i.next().getKey();
                  }

                  public void remove() {
                      i.remove();
                  }
              };
          }

          public int size() {
              return CompactAbstractMap.this.size();
          }

          public boolean isEmpty() {
              return CompactAbstractMap.this.isEmpty();
          }

          public void clear() {
              CompactAbstractMap.this.clear();
          }

          public boolean contains(Object k) {
              return CompactAbstractMap.this.containsKey(k);
          }
      };
  }

  public Collection<V> values() {
      return new AbstractCollection<V>() {
          public Iterator<V> iterator() {
              return new Iterator<V>() {
                  private Iterator<Entry<K, V>> i = entrySet().iterator();

                  public boolean hasNext() {
                      return i.hasNext();
                  }

                  public V next() {
                      return i.next().getValue();
                  }

                  public void remove() {
                      i.remove();
                  }
              };
          }

          public int size() {
              return CompactAbstractMap.this.size();
          }

          public boolean isEmpty() {
              return CompactAbstractMap.this.isEmpty();
          }

          public void clear() {
              CompactAbstractMap.this.clear();
          }

          public boolean contains(Object v) {
              return CompactAbstractMap.this.containsValue(v);
          }
      };
  }

  public abstract Set<Entry<K, V>> entrySet();

  public boolean equals(Object o) {
      if (o == this)
          return true;

      if (!(o instanceof Map))
          return false;
      Map<?, ?> m = (Map<?, ?>) o;
      if (m.size() != size())
          return false;

      try {
          for (Entry<K, V> e : entrySet()) {
              K key = e.getKey();
              V value = e.getValue();
              if (value == null) {
                  if (!(m.get(key) == null && m.containsKey(key)))
                      return false;
              } else {
                  if (!value.equals(m.get(key)))
                      return false;
              }
          }
      } catch (ClassCastException unused) {
          return false;
      } catch (NullPointerException unused) {
          return false;
      }

      return true;
  }

  public int hashCode() {
      int h = 0;
      for (Entry<K, V> entry : entrySet())
          h += entry.hashCode();
      return h;
  }

  public String toString() {
      Iterator<Entry<K, V>> i = entrySet().iterator();
      if (!i.hasNext())
          return "{}";

      StringBuilder sb = new StringBuilder();
      sb.append('{');
      for (; ; ) {
          Entry<K, V> e = i.next();
          K key = e.getKey();
          V value = e.getValue();
          sb.append(key == this ? "(this Map)" : key);
          sb.append('=');
          sb.append(value == this ? "(this Map)" : value);
          if (!i.hasNext())
              return sb.append('}').toString();
          sb.append(',').append(' ');
      }
  }

  protected Object clone() throws CloneNotSupportedException {
      CompactAbstractMap<?, ?> result = (CompactAbstractMap<?, ?>) super.clone();
      return result;
  }

  public static class SimpleEntry<K, V>
          implements Entry<K, V>, java.io.Serializable {
      @java.io.Serial
      private static final long serialVersionUID = -8499721149061103585L;

      @SuppressWarnings("serial")
      private final K key;
      @SuppressWarnings("serial")
      private V value;

      public SimpleEntry(K key, V value) {
          this.key = key;
          this.value = value;
      }

      public SimpleEntry(Entry<? extends K, ? extends V> entry) {
          this.key = entry.getKey();
          this.value = entry.getValue();
      }

      public K getKey() {
          return key;
      }

      public V getValue() {
          return value;
      }

      public V setValue(V value) {
          V oldValue = this.value;
          this.value = value;
          return oldValue;
      }

      public boolean equals(Object o) {
          if (!(o instanceof Map.Entry))
              return false;
          Entry<?, ?> e = (Entry<?, ?>) o;
          return eq(key, e.getKey()) && eq(value, e.getValue());
      }

      public int hashCode() {
          return (key == null ? 0 : key.hashCode()) ^
                  (value == null ? 0 : value.hashCode());
      }

      public String toString() {
          return key + "=" + value;
      }

  }

  public static class SimpleImmutableEntry<K, V>
          implements Entry<K, V>, java.io.Serializable {
      @java.io.Serial
      private static final long serialVersionUID = 7138329143949025153L;

      @SuppressWarnings("serial")
      private final K key;
      @SuppressWarnings("serial")
      private final V value;

      public SimpleImmutableEntry(K key, V value) {
          this.key = key;
          this.value = value;
      }

      public SimpleImmutableEntry(Entry<? extends K, ? extends V> entry) {
          this.key = entry.getKey();
          this.value = entry.getValue();
      }

      public K getKey() {
          return key;
      }

      public V getValue() {
          return value;
      }

      public V setValue(V value) {
          throw new UnsupportedOperationException();
      }

      public boolean equals(Object o) {
          if (!(o instanceof Map.Entry))
              return false;
          Entry<?, ?> e = (Entry<?, ?>) o;
          return eq(key, e.getKey()) && eq(value, e.getValue());
      }

      public int hashCode() {
          return (key == null ? 0 : key.hashCode()) ^
                  (value == null ? 0 : value.hashCode());
      }

      public String toString() {
          return key + "=" + value;
      }
  }
}

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Snippet ID:	#1031043
Snippet name:	CompactAbstractMap - two fields less than AbstractMap [i.e. NO fields at all]
Eternal ID of this version:	#1031043/4
Text MD5:	89711cf6ebff563a8c410bec75e8577a
Transpilation MD5:	fd07164415e6f0d2ff851df52abf40a2
Author:	stefan
Category:	javax
Type:	JavaX fragment (include)
Public (visible to everyone):	Yes
Archived (hidden from active list):	No
Created/modified:	2021-10-07 14:26:56
Source code size:	9289 bytes / 343 lines
Pitched / IR pitched:	No / No
Views / Downloads:	510 / 4024
Version history:	3 change(s)
Referenced in:	[show references]

< > BotCompany Repo | #1031043 // CompactAbstractMap - two fields less than AbstractMap [i.e. NO fields at all]

JavaX fragment (include) [tags: use-pretranspiled]

1	asclass CompactAbstractMap<K, V> implements Map<K, V> {
2	public int size() {
3	return entrySet().size();
4	}
5
6	public boolean isEmpty() {
7	return size() == 0;
8	}
9
10	public boolean containsValue(Object value) {
11	Iterator<Entry<K, V>> i = entrySet().iterator();
12	if (value == null) {
13	while (i.hasNext()) {
14	Entry<K, V> e = i.next();
15	if (e.getValue() == null)
16	return true;
17	}
18	} else {
19	while (i.hasNext()) {
20	Entry<K, V> e = i.next();
21	if (value.equals(e.getValue()))
22	return true;
23	}
24	}
25	return false;
26	}
27
28	public boolean containsKey(Object key) {
29	Iterator<Entry<K, V>> i = entrySet().iterator();
30	if (key == null) {
31	while (i.hasNext()) {
32	Entry<K, V> e = i.next();
33	if (e.getKey() == null)
34	return true;
35	}
36	} else {
37	while (i.hasNext()) {
38	Entry<K, V> e = i.next();
39	if (key.equals(e.getKey()))
40	return true;
41	}
42	}
43	return false;
44	}
45
46	public V get(Object key) {
47	Iterator<Entry<K, V>> i = entrySet().iterator();
48	if (key == null) {
49	while (i.hasNext()) {
50	Entry<K, V> e = i.next();
51	if (e.getKey() == null)
52	return e.getValue();
53	}
54	} else {
55	while (i.hasNext()) {
56	Entry<K, V> e = i.next();
57	if (key.equals(e.getKey()))
58	return e.getValue();
59	}
60	}
61	return null;
62	}
63
64	public V put(K key, V value) {
65	throw new UnsupportedOperationException();
66	}
67
68	public V remove(Object key) {
69	Iterator<Entry<K, V>> i = entrySet().iterator();
70	Entry<K, V> correctEntry = null;
71	if (key == null) {
72	while (correctEntry == null && i.hasNext()) {
73	Entry<K, V> e = i.next();
74	if (e.getKey() == null)
75	correctEntry = e;
76	}
77	} else {
78	while (correctEntry == null && i.hasNext()) {
79	Entry<K, V> e = i.next();
80	if (key.equals(e.getKey()))
81	correctEntry = e;
82	}
83	}
84
85	V oldValue = null;
86	if (correctEntry != null) {
87	oldValue = correctEntry.getValue();
88	i.remove();
89	}
90	return oldValue;
91	}
92
93	public void putAll(Map<? extends K, ? extends V> m) {
94	for (Entry<? extends K, ? extends V> e : m.entrySet())
95	put(e.getKey(), e.getValue());
96	}
97
98	public void clear() {
99	entrySet().clear();
100	}
101
102	public Set<K> keySet() {
103	return new AbstractSet<K>() {
104	public Iterator<K> iterator() {
105	return new Iterator<K>() {
106	private Iterator<Entry<K, V>> i = entrySet().iterator();
107
108	public boolean hasNext() {
109	return i.hasNext();
110	}
111
112	public K next() {
113	return i.next().getKey();
114	}
115
116	public void remove() {
117	i.remove();
118	}
119	};
120	}
121
122	public int size() {
123	return CompactAbstractMap.this.size();
124	}
125
126	public boolean isEmpty() {
127	return CompactAbstractMap.this.isEmpty();
128	}
129
130	public void clear() {
131	CompactAbstractMap.this.clear();
132	}
133
134	public boolean contains(Object k) {
135	return CompactAbstractMap.this.containsKey(k);
136	}
137	};
138	}
139
140	public Collection<V> values() {
141	return new AbstractCollection<V>() {
142	public Iterator<V> iterator() {
143	return new Iterator<V>() {
144	private Iterator<Entry<K, V>> i = entrySet().iterator();
145
146	public boolean hasNext() {
147	return i.hasNext();
148	}
149
150	public V next() {
151	return i.next().getValue();
152	}
153
154	public void remove() {
155	i.remove();
156	}
157	};
158	}
159
160	public int size() {
161	return CompactAbstractMap.this.size();
162	}
163
164	public boolean isEmpty() {
165	return CompactAbstractMap.this.isEmpty();
166	}
167
168	public void clear() {
169	CompactAbstractMap.this.clear();
170	}
171
172	public boolean contains(Object v) {
173	return CompactAbstractMap.this.containsValue(v);
174	}
175	};
176	}
177
178	public abstract Set<Entry<K, V>> entrySet();
179
180	public boolean equals(Object o) {
181	if (o == this)
182	return true;
183
184	if (!(o instanceof Map))
185	return false;
186	Map<?, ?> m = (Map<?, ?>) o;
187	if (m.size() != size())
188	return false;
189
190	try {
191	for (Entry<K, V> e : entrySet()) {
192	K key = e.getKey();
193	V value = e.getValue();
194	if (value == null) {
195	if (!(m.get(key) == null && m.containsKey(key)))
196	return false;
197	} else {
198	if (!value.equals(m.get(key)))
199	return false;
200	}
201	}
202	} catch (ClassCastException unused) {
203	return false;
204	} catch (NullPointerException unused) {
205	return false;
206	}
207
208	return true;
209	}
210
211	public int hashCode() {
212	int h = 0;
213	for (Entry<K, V> entry : entrySet())
214	h += entry.hashCode();
215	return h;
216	}
217
218	public String toString() {
219	Iterator<Entry<K, V>> i = entrySet().iterator();
220	if (!i.hasNext())
221	return "{}";
222
223	StringBuilder sb = new StringBuilder();
224	sb.append('{');
225	for (; ; ) {
226	Entry<K, V> e = i.next();
227	K key = e.getKey();
228	V value = e.getValue();
229	sb.append(key == this ? "(this Map)" : key);
230	sb.append('=');
231	sb.append(value == this ? "(this Map)" : value);
232	if (!i.hasNext())
233	return sb.append('}').toString();
234	sb.append(',').append(' ');
235	}
236	}
237
238	protected Object clone() throws CloneNotSupportedException {
239	CompactAbstractMap<?, ?> result = (CompactAbstractMap<?, ?>) super.clone();
240	return result;
241	}
242
243	public static class SimpleEntry<K, V>
244	implements Entry<K, V>, java.io.Serializable {
245	@java.io.Serial
246	private static final long serialVersionUID = -8499721149061103585L;
247
248	@SuppressWarnings("serial")
249	private final K key;
250	@SuppressWarnings("serial")
251	private V value;
252
253	public SimpleEntry(K key, V value) {
254	this.key = key;
255	this.value = value;
256	}
257
258	public SimpleEntry(Entry<? extends K, ? extends V> entry) {
259	this.key = entry.getKey();
260	this.value = entry.getValue();
261	}
262
263	public K getKey() {
264	return key;
265	}
266
267	public V getValue() {
268	return value;
269	}
270
271	public V setValue(V value) {
272	V oldValue = this.value;
273	this.value = value;
274	return oldValue;
275	}
276
277	public boolean equals(Object o) {
278	if (!(o instanceof Map.Entry))
279	return false;
280	Entry<?, ?> e = (Entry<?, ?>) o;
281	return eq(key, e.getKey()) && eq(value, e.getValue());
282	}
283
284	public int hashCode() {
285	return (key == null ? 0 : key.hashCode()) ^
286	(value == null ? 0 : value.hashCode());
287	}
288
289	public String toString() {
290	return key + "=" + value;
291	}
292
293	}
294
295	public static class SimpleImmutableEntry<K, V>
296	implements Entry<K, V>, java.io.Serializable {
297	@java.io.Serial
298	private static final long serialVersionUID = 7138329143949025153L;
299
300	@SuppressWarnings("serial")
301	private final K key;
302	@SuppressWarnings("serial")
303	private final V value;
304
305	public SimpleImmutableEntry(K key, V value) {
306	this.key = key;
307	this.value = value;
308	}
309
310	public SimpleImmutableEntry(Entry<? extends K, ? extends V> entry) {
311	this.key = entry.getKey();
312	this.value = entry.getValue();
313	}
314
315	public K getKey() {
316	return key;
317	}
318
319	public V getValue() {
320	return value;
321	}
322
323	public V setValue(V value) {
324	throw new UnsupportedOperationException();
325	}
326
327	public boolean equals(Object o) {
328	if (!(o instanceof Map.Entry))
329	return false;
330	Entry<?, ?> e = (Entry<?, ?>) o;
331	return eq(key, e.getKey()) && eq(value, e.getValue());
332	}
333
334	public int hashCode() {
335	return (key == null ? 0 : key.hashCode()) ^
336	(value == null ? 0 : value.hashCode());
337	}
338
339	public String toString() {
340	return key + "=" + value;
341	}
342	}
343	}