43 lines
1009 B
Java
43 lines
1009 B
Java
// SPDX-FileCopyrightText: 2021 Paul Schaub <vanitasvitae@fsfe.org>
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//
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// SPDX-License-Identifier: Apache-2.0
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package org.pgpainless.util;
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import java.lang.reflect.Array;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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public final class CollectionUtils {
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private CollectionUtils() {
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}
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public static <I> List<I> iteratorToList(Iterator<I> iterator) {
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List<I> items = new ArrayList<>();
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while (iterator.hasNext()) {
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I item = iterator.next();
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items.add(item);
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}
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return items;
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}
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public static <T> T[] concat(T t, T[] ts) {
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T[] concat = (T[]) Array.newInstance(t.getClass(), ts.length + 1);
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concat[0] = t;
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System.arraycopy(ts, 0, concat, 1, ts.length);
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return concat;
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}
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public static <T> boolean contains(T[] ts, T t) {
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for (T i : ts) {
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if (i.equals(t)) {
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return true;
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}
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}
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return false;
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}
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}
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