com.hazelcast.internal.config.yaml.EmptyNodeList Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2020, Hazelcast, Inc. All Rights Reserved.
*
* 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 com.hazelcast.internal.config.yaml;
import com.hazelcast.internal.yaml.YamlNode;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
/**
* Empty {@link NodeList} implementation. Used by {@link ElementAdapter#getChildNodes()}
* when wrapping {@link YamlNode}s with no children.
*/
final class EmptyNodeList implements NodeList {
private static final NodeList INSTANCE = new EmptyNodeList();
private EmptyNodeList() {
}
@Override
public Node item(int index) {
return null;
}
@Override
public int getLength() {
return 0;
}
/**
* Returns the singleton instance of this class
*
* @return an empty {@link NodeList}
* @see #INSTANCE
*/
static NodeList emptyNodeList() {
return INSTANCE;
}
}