import com.google.common.collect.ImmutableCollection;

import javax.annotation.Nullable;

class ValidatingValueCollector<T> implements ValueCollector<T> {
    private final Class<?> collectionType;
    private final Class<T> elementType;
    private final ValueSanitizer<T> sanitizer;

    ValidatingValueCollector(Class<?> collectionType, Class<T> elementType, ValueSanitizer<T> sanitizer) {
        this.collectionType = collectionType;

        super(host);
        this.collectionType = collectionType;
        this.elementType = elementType;
        this.collectionFactory = collectionFactory;
        valueCollector = new ValidatingValueCollector<>(collectionType, elementType, ValueSanitizers.forType(elementType));
        init();
    }

    private void init() {
        defaultValue = emptySupplier();
        init(defaultValue, noValueSupplier());

    public DefaultMapProperty(PropertyHost propertyHost, Class<K> keyType, Class<V> valueType) {
        super(propertyHost);
        this.keyType = keyType;
        this.valueType = valueType;
        keyCollector = new ValidatingValueCollector<>(Set.class, keyType, ValueSanitizers.forType(keyType));
        entryCollector = new ValidatingMapEntryCollector<>(keyType, valueType, ValueSanitizers.forType(keyType), ValueSanitizers.forType(valueType));
        init();