import java.util.Map;
import java.util.Date;
import java.util.HashMap;
import org.apache.commons.collections.map.LazyMap;
import org.apache.commons.collections.FactoryUtils;
import org.apache.commons.collections.map.IdentityMap;
import org.apache.commons.collections.map.CaseInsensitiveMap;
public class MapHeavenV1 {
public static void main(String args[]) {
MapHeavenV1 instance = new MapHeavenV1();
instance.createMaps();
instance.testMaps();
}
private void testMaps() {
cIMap.put("key1", "value1");
cIMap.put("key2", "value2");
cIMap.put("KeY1", "value3");
System.err.println("Value of key1: " + cIMap.get("key1")); // value3 because it is case insensitive
Integer identRef = new Integer(1);
Integer identRef2 = new Integer(1);
identMap.put(identRef, "value1");
identMap.put(identRef2, "value3");
System.err.println("Value of identRef2: " + identMap.get(identRef2)); // value 3 even though both identRef and identRef2 are equal
System.err.println(lazyMap); // only creates elements when they are accessed
lazyMap.get("EmptyBuffer");
System.err.println(lazyMap);
}
private void createMaps() {
cIMap = new CaseInsensitiveMap();
identMap = new IdentityMap();
lazyMap = LazyMap.decorate(
new HashMap(),
FactoryUtils.instantiateFactory(StringBuffer.class));
}
private CaseInsensitiveMap cIMap;
private IdentityMap identMap;
private Map lazyMap;
}
ApacheCommonMapHeavenV1.zip( 514 k)