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comparison src/luan/LuanCloner.java @ 782:655280eab1e2

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start limited cloning
author Franklin Schmidt <fschmidt@gmail.com>
date Tue, 30 Aug 2016 01:29:33 -0600
parents fbbdd369a13a
children 6a7c6879158d
comparison
equal deleted inserted replaced
781:fbbdd369a13a 782:655280eab1e2
4 import java.util.HashMap; 4 import java.util.HashMap;
5 import java.util.IdentityHashMap; 5 import java.util.IdentityHashMap;
6 6
7 7
8 public final class LuanCloner { 8 public final class LuanCloner {
9 public final boolean deep;
9 private final Map cloned = new IdentityHashMap(); 10 private final Map cloned = new IdentityHashMap();
10 11
11 public LuanCloneable deepClone(LuanCloneable obj) { 12 public LuanCloner(boolean deep) {
13 this.deep = deep;
14 }
15
16 public LuanCloneable clone(LuanCloneable obj) {
12 if( obj==null ) 17 if( obj==null )
13 return null; 18 return null;
14 LuanCloneable rtn = (LuanCloneable)cloned.get(obj); 19 LuanCloneable rtn = (LuanCloneable)cloned.get(obj);
15 if( rtn == null ) { 20 if( rtn == null ) {
16 rtn = obj.shallowClone(); 21 rtn = obj.shallowClone(this);
17 cloned.put(obj,rtn); 22 cloned.put(obj,rtn);
18 obj.deepenClone(rtn,this); 23 obj.deepenClone(rtn,this);
19 } 24 }
20 return rtn; 25 return rtn;
21 } 26 }
22 27
23 public Object[] deepClone(Object[] obj) { 28 public Object[] clone(Object[] obj) {
24 if( obj.length == 0 ) 29 if( obj.length == 0 )
25 return obj; 30 return obj;
26 Object[] rtn = (Object[])cloned.get(obj); 31 Object[] rtn = (Object[])cloned.get(obj);
27 if( rtn == null ) { 32 if( rtn == null ) {
28 rtn = obj.clone(); 33 rtn = obj.clone();
32 } 37 }
33 } 38 }
34 return rtn; 39 return rtn;
35 } 40 }
36 41
37 public Map deepClone(Map obj) { 42 public Map clone(Map obj) {
38 if( !obj.getClass().equals(HashMap.class) ) 43 if( !obj.getClass().equals(HashMap.class) )
39 throw new RuntimeException("can only clone HashMap"); 44 throw new RuntimeException("can only clone HashMap");
40 Map rtn = (Map)cloned.get(obj); 45 Map rtn = (Map)cloned.get(obj);
41 if( rtn == null ) { 46 if( rtn == null ) {
42 rtn = new HashMap(); 47 rtn = new HashMap();
48 return rtn; 53 return rtn;
49 } 54 }
50 55
51 public Object get(Object obj) { 56 public Object get(Object obj) {
52 if( obj instanceof LuanCloneable ) 57 if( obj instanceof LuanCloneable )
53 return deepClone((LuanCloneable)obj); 58 return clone((LuanCloneable)obj);
54 if( obj instanceof Object[] ) 59 if( obj instanceof Object[] )
55 return deepClone((Object[])obj); 60 return clone((Object[])obj);
56 if( obj instanceof Map ) 61 if( obj instanceof Map )
57 return deepClone((Map)obj); 62 return clone((Map)obj);
58 return obj; 63 return obj;
59 } 64 }
65 /*
66 public Object check(Object obj) {
67 if( deep )
68 throw new RuntimeException();
69 if( !(obj instanceof LuanCloneable) )
70 return obj;
71 LuanCloneable lc = (LuanCloneable)obj;
72 return lc.getCloner() == this ? lc : clone(lc);
73 }
74 */
60 } 75 }