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package org.onap.sdc.dcae.catalog.commons;
import java.util.Map;
import java.util.HashMap;
import java.util.function.Function;
import org.onap.sdc.dcae.catalog.commons.MapBuilder;
import java.util.function.BiFunction;
public class MapBuilder<K,V> {
private Map<K,V> map;
public MapBuilder() {
this.map = new HashMap<K,V>();
}
public boolean isEmpty() {
return this.map.isEmpty();
}
public MapBuilder<K,V> put(K theKey, V theValue) {
this.map.put(theKey, theValue);
return this;
}
public MapBuilder<K,V> putOpt(K theKey, V theValue) {
if (theValue != null) {
this.map.put(theKey, theValue);
}
return this;
}
public MapBuilder<K,V> put(final Map.Entry<? extends K, ? extends V> theEntry) {
this.map.put(theEntry.getKey(), theEntry.getValue());
return this;
}
public MapBuilder<K,V> putOpt(final Map.Entry<? extends K, ? extends V> theEntry) {
if (theEntry != null) {
this.map.put(theEntry.getKey(), theEntry.getValue());
}
return this;
}
public MapBuilder<K,V> putAll(final Iterable<? extends Map.Entry<? extends K, ? extends V>> theEntries) {
for (final Map.Entry<? extends K, ? extends V> e : theEntries) {
this.map.put(e.getKey(), e.getValue());
}
return this;
}
/* If theEntries contains multiple entries with the same key then the key gets a suffix in order to make it unique
.. */
// public MapBuilder forceAll(final Iterable<? extends Map.Entry<? extends K, ? extends V>> theEntries,
public MapBuilder<K,V> forceAll(final Iterable<? extends Map.Entry<K, V>> theEntries,
Function<Map.Entry<K, V> , K> rekeyFunction) {
for (final Map.Entry<? extends K, ? extends V> e : theEntries) {
K key = e.getKey();
if (this.map.containsKey(key))
key = rekeyFunction.apply((Map.Entry<K,V>)e);
this.map.put(key, e.getValue());
}
return this;
}
public MapBuilder<K,V> putAll(final Map<? extends K, ? extends V> theMap) {
this.map.putAll(theMap);
return this;
}
public Map<K,V> build() {
return this.map;
}
public Map<K,V> buildOpt() {
return this.map.isEmpty() ? null : this.map;
}
}
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