org.decision_deck.jmcda.structure.thresholds.ThresholdsZeroes Maven / Gradle / Ivy

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The base classes of the J-MCDA project. Contains the main structure classes that define MCDA concepts such as alternatives and performance matrixes.

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package org.decision_deck.jmcda.structure.thresholds;

import static com.google.common.base.Preconditions.checkNotNull;

import java.util.Map;
import java.util.Set;

import org.decision_deck.jmcda.structure.Criterion;
import org.decision_deck.utils.collection.SetBackedMap;

import com.google.common.base.Functions;
import com.google.common.collect.ImmutableMap;

class ThresholdsZeroes extends ThresholdsMapBased implements Thresholds {

    private final Set m_criteria;
    private final ImmutableMap m_empty = ImmutableMap.of();

    public ThresholdsZeroes(Set criteria) {
	checkNotNull(criteria);
	m_criteria = criteria;
    }

    @Override
    public Map getVetoThresholds() {
	return m_empty;
    }

    @Override
    public Map getPreferenceThresholds() {
	return new SetBackedMap(m_criteria, Functions.constant(Double.valueOf(0d)));
    }

    @Override
    public Map getIndifferenceThresholds() {
	return new SetBackedMap(m_criteria, Functions.constant(Double.valueOf(0d)));
    }

}