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package au.id.zancanaro.javacheck.state;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.function.Supplier;
public class CommandValue<T> {
private static Map<Integer, Object> values = null;
public static <T> T withValues(Map<Integer, Object> newValues, Supplier<T> action) {
Map<Integer,Object> oldValues = values;
try {
values = newValues;
return action.get();
} finally {
values = oldValues;
}
}
private final int id;
public CommandValue(int id) {
this.id = id;
}
public boolean isAbstract() {
return values == null;
}
@SuppressWarnings("unchecked")
public T get() {
if (values.containsKey(getId())) {
return (T) values.get(getId());
} else {
throw new NoSuchElementException("Concrete values cannot be supplied prior to being calculated");
}
}
public int getId() {
return id;
}
@Override
public String toString() {
return "#{" + id + "}";
}
}
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