com.jcabi.dynamo.Dosage Maven / Gradle / Ivy
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package com.jcabi.dynamo;
import com.amazonaws.services.dynamodbv2.model.AttributeValue;
import com.jcabi.aspects.Immutable;
import com.jcabi.aspects.Loggable;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import lombok.EqualsAndHashCode;
import lombok.ToString;
/**
* Dosage of items retrieved from table.
*
* @since 0.1
*/
@Immutable
public interface Dosage {
/**
* Items.
* @return List of items
*/
List> items();
/**
* Has next dosage?
* @return TRUE if next storage is avaiable
*/
boolean hasNext();
/**
* Fetch next dosage.
* @return The dosage
*/
Dosage next();
/**
* Always empty.
*
* @since 0.1
*/
@Immutable
@Loggable(Loggable.DEBUG)
@ToString
@EqualsAndHashCode
final class Empty implements Dosage {
@Override
public List> items() {
return new ArrayList<>(0);
}
@Override
public Dosage next() {
throw new IllegalStateException(
"this is nothing left"
);
}
@Override
public boolean hasNext() {
return false;
}
}
}