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This is a fork of the implementation of the JSON Schema Core Draft v4 specification built with the org.json API which also supports internationalization

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package org.everit.json.schema.regexp;

import static java.util.Objects.requireNonNull;

import java.util.Optional;

public interface Regexp {

    Optional patternMatchingFailure(String input);

}

abstract class AbstractRegexp implements Regexp {

    private final String asString;

    AbstractRegexp(String asString) {
        this.asString = requireNonNull(asString, "asString cannot be null");
    }

    @Override public String toString() {
        return asString;
    }
}