PrerequisitesMatcher.java

package io.split.engine.matchers;

import io.split.client.dtos.Prerequisites;
import io.split.engine.evaluator.EvaluationContext;

import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.stream.Collectors;

public class PrerequisitesMatcher implements Matcher {
    private List<Prerequisites> _prerequisites;

    public PrerequisitesMatcher(List<Prerequisites> prerequisites) {
        _prerequisites = prerequisites;
    }

    @Override
    public boolean match(Object matchValue, String bucketingKey, Map<String, Object> attributes, EvaluationContext evaluationContext) {
        if (matchValue == null) {
            return false;
        }

        if (!(matchValue instanceof String)) {
            return false;
        }
        for (Prerequisites prerequisites : _prerequisites) {
            String treatment = evaluationContext.getEvaluator().evaluateFeature((String) matchValue, bucketingKey,
                    prerequisites.featureFlagName, attributes). treatment;
            if (!prerequisites.treatments.contains(treatment)) {
                return false;
            }
        }
        return true;
    }

    @Override
    public String toString() {
        StringBuilder bldr = new StringBuilder();
        bldr.append("prerequisites: ");
        bldr.append(this._prerequisites.stream().map(pr -> pr.featureFlagName + " " +
                pr.treatments.toString()).map(Object::toString).collect(Collectors.joining(", ")));
        return bldr.toString();
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        PrerequisitesMatcher that = (PrerequisitesMatcher) o;

        return Objects.equals(_prerequisites, that._prerequisites);
    }

    @Override
    public int hashCode() {
        int result = _prerequisites != null ? _prerequisites.hashCode() : 0;
        result = 31 * result + (_prerequisites != null ? _prerequisites.hashCode() : 0);
        return result;
    }
}