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A commons library for the NVA project

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package no.unit.nva.auth;

public abstract class CachedValueProvider {

    protected T cachedValue;

    public T getValue() {
        if (cachedValue == null || isExpired()) {
            cachedValue = getNewValue();
        }
        return cachedValue;
    }

    protected abstract boolean isExpired();

    protected abstract T getNewValue();
}