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Added missing map methods

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This commit is contained in:
Sergey Kapralov 2016-08-23 10:39:37 +03:00
parent 035c616b5e
commit dc4a937262
1 changed files with 74 additions and 1 deletions
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75
classlib/src/main/java/org/teavm/classlib/java/util/TMap.java
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@ -15,6 +15,9 @@
*/
package org.teavm.classlib.java.util;
import java.util.function.BiFunction;
import java.util.function.Function;
/**
*
* @author Alexey Andreev
@ -43,7 +46,7 @@ public interface TMap<K, V> {
V put(K key, V value);
V remove(Object key);
void putAll(TMap<? extends K, ? extends V> m);
void clear();
@ -53,4 +56,74 @@ public interface TMap<K, V> {
TCollection<V> values();
TSet<Entry<K, V>> entrySet();
default boolean replace(K key, V value, V newValue) {
if (containsKey(key) && TObjects.equals(get(key), value)) {
put(key, newValue);
return true;
} else {
return false;
}
}
default V replace(K key, V value) {
if (containsKey(key)) {
return put(key, value);
} else {
return null;
}
}
default V computeIfAbsent(K key, Function<? super K, ? extends V> mappingFunction) {
V v = get(key);
if (v == null) {
V newValue = mappingFunction.apply(key);
if (newValue != null) {
put(key, newValue);
}
return newValue;
}
return v;
}
default V computeIfPresent(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
V v = get(key);
if (v != null) {
V oldValue = v;
V newValue = remappingFunction.apply(key, oldValue);
if (newValue != null) {
return put(key, newValue);
} else {
return remove(key);
}
}
return v;
}
default V compute(K key, BiFunction<? super K, ? super V, ? extends V> remappingFunction) {
V oldValue = get(key);
V newValue = remappingFunction.apply(key, oldValue);
if (oldValue != null) {
if (newValue != null) {
return put(key, newValue);
} else {
return remove(key);
}
} else if (newValue != null) {
return put(key, newValue);
} else {
return null;
}
}
default V merge(K key, V value, BiFunction<? super V, ? super V, ? extends V> remappingFunction) {
V oldValue = get(key);
V newValue = (oldValue == null) ? value
: remappingFunction.apply(oldValue, value);
if (newValue == null) {
return remove(key);
} else {
return put(key, newValue);
}
}
}