/*
* Licensed to Crate under one or more contributor license agreements.
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership. Crate licenses this file
* to you 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial
* agreement.
*/
package io.crate.core.collections;
import java.lang.reflect.Array;
import java.util.Collection;
public class ForEach {
public static interface Acceptor {
public void accept(Object value);
}
/**
* apply an acceptor to all elements of a collection, a primitive or non-primitive array
*
* @param arrayOrCollection a collection, a primitive or non-primitive array
* @param fun called for every element of <code>arrayOrCollection</code> as Object
*/
public static void forEach(Object arrayOrCollection, Acceptor fun) {
if (arrayOrCollection.getClass().isArray()) {
int arrayLength = Array.getLength(arrayOrCollection);
for (int i = 0; i < arrayLength; i++) {
Object elem = Array.get(arrayOrCollection, i);
fun.accept(elem);
}
} else if (arrayOrCollection instanceof Collection) {
for (Object elem : ((Collection) arrayOrCollection)) {
fun.accept(elem);
}
} else {
throw new AssertionError("argument is neither an array nor a collection");
}
}
}