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Core API and libraries of hamcrest matcher framework.

There is a newer version: 3.0

package org.hamcrest.internal;

import org.hamcrest.Matcher;
import org.hamcrest.core.IsNull;

import java.util.ArrayList;
import java.util.List;

public class NullSafety {
    @SuppressWarnings("unchecked")
    public static  List> nullSafe(Matcher[] itemMatchers) {
        final List> matchers = new ArrayList>(itemMatchers.length);
        for (final Matcher itemMatcher : itemMatchers) {
            matchers.add((Matcher) (itemMatcher == null ? IsNull.nullValue() : itemMatcher));
        }
        return matchers;
    }
}