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import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
public class Main {
/**
* Clones a map and prefixes the keys in the clone, e.g.
* for mapping "JAVA_HOME" to "env.JAVA_HOME" to simulate
* the behaviour of ANT.
*
* @param source the source map
* @param prefix the prefix used for all names
* @return the clone of the source map
*/
public static Map prefix(Map source, String prefix) {
if(source == null) {
return null;
}
Map result = new HashMap();
Iterator iter = source.entrySet().iterator();
while(iter.hasNext()) {
Map.Entry entry = (Map.Entry) iter.next();
Object key = entry.getKey();
Object value = entry.getValue();
result.put(prefix + '.' + key.toString(), value);
}
return result;
}
}
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