net.bytebuddy.matcher.CollectionElementMatcher Maven / Gradle / Ivy
/*
* Copyright 2014 - Present 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 net.bytebuddy.build.HashCodeAndEqualsPlugin;
import java.util.Iterator;
/**
* A matcher that matches a given element of a collection. If no such element is contained by the matched iterable, the matcher
* returns {@code false}.
*
* @param The type of the elements contained by the collection.
*/
@HashCodeAndEqualsPlugin.Enhance
public class CollectionElementMatcher extends ElementMatcher.Junction.ForNonNullValues> {
/**
* The index of the matched element.
*/
private final int index;
/**
* The matcher for the given element, if it exists.
*/
private final ElementMatcher matcher;
/**
* Creates a new matcher for an element in a collection.
*
* @param index The index of the matched element.
* @param matcher The matcher for the given element, if it exists.
*/
public CollectionElementMatcher(int index, ElementMatcher matcher) {
this.index = index;
this.matcher = matcher;
}
/**
* {@inheritDoc}
*/
protected boolean doMatch(Iterable target) {
Iterator iterator = target.iterator();
for (int index = 0; index < this.index; index++) {
if (iterator.hasNext()) {
iterator.next();
} else {
return false;
}
}
return iterator.hasNext() && matcher.matches(iterator.next());
}
@Override
public String toString() {
return "with(" + index + " matches " + matcher + ")";
}
}