Iterators.java
/*
* Copyright (C) 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package androidx.test.espresso.util;
import androidx.annotation.RestrictTo;
import androidx.annotation.RestrictTo.Scope;
import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Iterator;
/**
* A reimplementation of needed methods from Guava, to avoid the direct dependency.
*
* @hide
*/
@RestrictTo(Scope.LIBRARY_GROUP)
public class Iterators {
private Iterators() {}
/**
* Converts an iterator into a array.
*
* @param iterator the {@link Iterator} to convert
* @param clazz the element type
* @return an array of all of the iterators' elements
* @hide
*/
@RestrictTo(Scope.LIBRARY_GROUP)
public static <T> T[] toArray(Iterator<T> iterator, Class<T> clazz) {
ArrayList<T> arrayList = new ArrayList<>();
while (iterator.hasNext()) {
arrayList.add(iterator.next());
}
return arrayList.toArray((T[]) Array.newInstance(clazz, arrayList.size()));
}
}