Mercurial Hosting > luan
view src/luan/LuanCloner.java @ 1277:5ba660381bd5
fix Io.print()
author | Franklin Schmidt <fschmidt@gmail.com> |
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date | Tue, 11 Dec 2018 03:38:43 -0700 |
parents | d69d3c51c44e |
children | e0cf0d108a77 |
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package luan; import java.util.Map; import java.util.HashMap; import java.util.IdentityHashMap; public final class LuanCloner { public enum Type { COMPLETE, INCREMENTAL } public final Type type; private final Map cloned = new IdentityHashMap(); public LuanCloner(Type type) { this.type = type; } public LuanCloneable clone(LuanCloneable obj) { if( obj==null ) return null; LuanCloneable rtn = (LuanCloneable)cloned.get(obj); if( rtn == null ) { rtn = obj.shallowClone(); cloned.put(obj,rtn); obj.deepenClone(rtn,this); } return rtn; } public Object[] clone(Object[] obj) { if( obj.length == 0 ) return obj; Object[] rtn = (Object[])cloned.get(obj); if( rtn == null ) { rtn = obj.clone(); cloned.put(obj,rtn); for( int i=0; i<rtn.length; i++ ) { rtn[i] = get(rtn[i]); } } return rtn; } public Map clone(Map obj) { if( !obj.getClass().equals(HashMap.class) ) throw new RuntimeException("can only clone HashMap"); Map rtn = (Map)cloned.get(obj); if( rtn == null ) { rtn = new HashMap(); for( Object stupid : obj.entrySet() ) { Map.Entry entry = (Map.Entry)stupid; rtn.put( get(entry.getKey()), get(entry.getValue()) ); } } return rtn; } public Object get(Object obj) { if( obj instanceof LuanCloneable ) return clone((LuanCloneable)obj); if( obj instanceof Object[] ) return clone((Object[])obj); if( obj instanceof Map ) return clone((Map)obj); return obj; } }