/*
 * Copyright 2014 - 2020 Rafael Winterhalter
 *
 * 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 net.bytebuddy.matcher;

import edu.umd.cs.findbugs.annotations.SuppressFBWarnings;
import net.bytebuddy.build.HashCodeAndEqualsPlugin;

import java.util.Collection;

An element matcher that matches a collection by its size.
Type parameters:
  • <T> – The type of the matched entity.
/** * An element matcher that matches a collection by its size. * * @param <T> The type of the matched entity. */
@HashCodeAndEqualsPlugin.Enhance public class CollectionSizeMatcher<T extends Iterable<?>> extends ElementMatcher.Junction.AbstractBase<T> {
The expected size of the matched collection.
/** * The expected size of the matched collection. */
private final int size;
Creates a new matcher that matches the size of a matched collection.
Params:
  • size – The expected size of the matched collection.
/** * Creates a new matcher that matches the size of a matched collection. * * @param size The expected size of the matched collection. */
public CollectionSizeMatcher(int size) { this.size = size; }
{@inheritDoc}
/** * {@inheritDoc} */
@SuppressFBWarnings(value = "DLS_DEAD_LOCAL_STORE", justification = "Iteration required to count size of an iterable") public boolean matches(T target) { if (target instanceof Collection) { return ((Collection<?>) target).size() == size; } else { int size = 0; for (Object ignored : target) { size++; } return size == this.size; } } @Override public String toString() { return "ofSize(" + size + ')'; } }