Mercurial Hosting > luan
diff core/src/luan/DeepCloner.java @ 171:3dcb0f9bee82
add core component
git-svn-id: https://luan-java.googlecode.com/svn/trunk@172 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Sun, 22 Jun 2014 05:41:22 +0000 |
parents | src/luan/DeepCloner.java@0149bdf98fd8 |
children | 24ede40ee0aa |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/core/src/luan/DeepCloner.java Sun Jun 22 05:41:22 2014 +0000 @@ -0,0 +1,45 @@ +package luan; + +import java.util.Map; +import java.util.IdentityHashMap; + + +public final class DeepCloner { + private final Map<Object,Object> cloned = new IdentityHashMap<Object,Object>(); + + public <T extends DeepCloneable<T>> T deepClone(T obj) { + @SuppressWarnings("unchecked") + T rtn = (T)cloned.get(obj); + if( rtn == null ) { + rtn = obj.shallowClone(); + cloned.put(obj,rtn); + obj.deepenClone(rtn,this); + } + return rtn; + } + + public <T> T[] deepClone(T[] obj) { + if( obj.length == 0 ) + return obj; + @SuppressWarnings("unchecked") + T[] rtn = (T[])cloned.get(obj); + if( rtn == null ) { + rtn = obj.clone(); + cloned.put(obj,rtn); + for( int i=0; i<rtn.length; i++ ) { + @SuppressWarnings("unchecked") + T t = get(rtn[i]); + rtn[i] = t; + } + } + return rtn; + } + + public <T> T get(T obj) { + if( !(obj instanceof DeepCloneable) ) + return obj; + @SuppressWarnings("unchecked") + T dc = (T)deepClone((DeepCloneable)obj); + return dc; + } +}