package org.jdbi.v3.sqlobject.customizer;

import org.jdbi.v3.core.internal.ReflectionArrayIterator;

import java.lang.reflect.Array;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;

final class BindListUtil {
    private BindListUtil() {
    }

    static Iterator<?> toIterator(final Object obj) {
        if (obj == null) {
            throw new IllegalArgumentException("cannot make iterator of null");
        }

        if (obj instanceof Iterable) {
            return ((Iterable<?>) obj).iterator();
        }

        if (obj.getClass().isArray()) {
            if (obj instanceof Object[]) {
                return Arrays.asList((Object[]) obj).iterator();
            } else {
                return ReflectionArrayIterator.of(obj);
            }
        }

        throw new IllegalArgumentException(getTypeWarning(obj.getClass()));
    }

    static boolean isEmpty(final Object obj) {
        if (obj == null) {
            throw new IllegalArgumentException("cannot determine emptiness of null");
        }

        if (obj instanceof Collection) {
            return ((Collection<?>) obj).isEmpty();
        }

        if (obj instanceof Iterable) {
            return !((Iterable<?>) obj).iterator().hasNext();
        }

        if (obj.getClass().isArray()) {
            return Array.getLength(obj) == 0;
        }

        throw new IllegalArgumentException(getTypeWarning(obj.getClass()));
    }

    private static String getTypeWarning(final Class<?> type) {
        return "argument must be one of the following: Iterable, or an array/varargs (primitive or complex type); was " + type.getName() + " instead";
    }
}

@@ -1,8 +1,566 @@
+/*%0A * Licensed under the Apache License, Version 2.0 (the %22License%22);%0A * you may not use this file except in compliance with the License.%0A * You may obtain a copy of the License at%0A *%0A * http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the License for the specific language governing permissions and%0A * limitations under the License.%0A */%0A
 package 

Add license to BindListUtil.java.