server/protocols/jmap-rfc-8621/src/main/java/org/apache/james/jmap/mailet/filter/RuleMatcher.java

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package org.apache.james.jmap.mailet.filter;

import java.util.List;
import java.util.stream.Stream;

import org.apache.james.jmap.api.filtering.Rule;
import org.apache.mailet.Mail;

import com.google.common.base.Preconditions;

class RuleMatcher {
    private final List<Rule> filteringRules;

    RuleMatcher(List<Rule> filteringRules) {
        Preconditions.checkNotNull(filteringRules);

        this.filteringRules = filteringRules;
    }

    Stream<Rule> findApplicableRules(Mail mail) {
        return filteringRules.stream()
            .filter(rule -> MailMatcher.from(rule).match(mail));
    }
}