PropertyContainerRuleSet.java

/*
 *  Copyright (c) 2022, Ben Fortuna
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 *  notice, this list of conditions and the following disclaimer.
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 *   o Redistributions in binary form must reproduce the above copyright
 *  notice, this list of conditions and the following disclaimer in the
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 *  may be used to endorse or promote products derived from this software
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package net.fortuna.ical4j.validate;

import net.fortuna.ical4j.model.Property;
import net.fortuna.ical4j.model.PropertyContainer;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.function.Predicate;

public class PropertyContainerRuleSet extends AbstractValidationRuleSet<PropertyContainer> {

    public PropertyContainerRuleSet(String context, ValidationRule... rules) {
        super(context, rules);
    }

    @Override
    public List<ValidationEntry> apply(PropertyContainer target) {
        List<ValidationEntry> results = new ArrayList<>();
        for (ValidationRule rule: rules) {
            List<String> matches = Collections.emptyList();
            if (rule instanceof PredicateRule<?>) {
                Predicate<Property> predicate = ((PredicateRule<Property>) rule).getPredicate();
                matches = matches(rule.getInstances(), s -> predicate.test(target.getProperty(s)));
            } else {
                int total = rule.getInstances().stream().mapToInt(s -> target.getProperties(s).size()).sum();
                switch (rule.getType()) {
                    case None:
                        matches = matches(rule.getInstances(), s -> target.getProperty(s) != null);
                        break;
                    case One:
                        matches = matches(rule.getInstances(), s -> target.getProperties(s).size() != 1);
                        break;
                    case OneOrLess:
                        matches = matches(rule.getInstances(), s -> target.getProperties(s).size() > 1);
                        break;
                    case OneOrMore:
                        matches = matches(rule.getInstances(), s -> target.getProperties(s).size() < 1);
                        break;
                    case OneExclusive:
                        if (rule.getInstances().stream().anyMatch(s -> target.getProperties(s).size() > 0
                                && target.getProperties(s).size() != total)) {
                            matches = rule.getInstances();
                        }
                        break;
                    case AllOrNone:
                        if (total > 0 && total != rule.getInstances().size()) {
                            matches = rule.getInstances();
                        }
                        break;
                }
            }
            if (!matches.isEmpty()) {
                results.add(new ValidationEntry(rule, context, matches.toArray(new String[0])));
            }
        }
        return results;
    }

}