package com.datastax.oss.driver.internal.core.type.codec.extras;
import com.datastax.oss.driver.api.core.type.codec.MappingCodec;
import com.datastax.oss.driver.api.core.type.codec.TypeCodec;
import com.datastax.oss.driver.api.core.type.reflect.GenericType;
import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;
import java.util.Collection;
import java.util.Map;
import java.util.Objects;
import java.util.Optional;
import net.jcip.annotations.Immutable;
@Immutable
public class <T> extends MappingCodec<T, Optional<T>> {
public (@NonNull TypeCodec<T> innerCodec) {
super(
Objects.requireNonNull(innerCodec, "innerCodec must not be null"),
GenericType.optionalOf(innerCodec.getJavaType()));
}
@Override
public boolean (@NonNull Object value) {
Objects.requireNonNull(value);
if (value instanceof Optional) {
Optional<?> optional = (Optional<?>) value;
return optional.map(innerCodec::accepts).orElse(true);
}
return false;
}
@Nullable
@Override
protected Optional<T> (@Nullable T value) {
return Optional.ofNullable(isAbsent(value) ? null : value);
}
@Nullable
@Override
protected T (@Nullable Optional<T> value) {
return value != null && value.isPresent() ? value.get() : null;
}
protected boolean (@Nullable T value) {
return value == null
|| (value instanceof Collection && ((Collection<?>) value).isEmpty())
|| (value instanceof Map && ((Map<?, ?>) value).isEmpty());
}
}