io.jenkins.x.client.tree.TreeNode Maven / Gradle / Ivy

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/**
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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.
 */
package io.jenkins.x.client.tree;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

/**
 */
public abstract class TreeNode extends BaseNode {
    private final TreeItem parent;
    private final String label;
    private TreeModelListeners listeners;
    private Map children = new TreeMap<>();

    public TreeNode(TreeModelListeners listeners, TreeItem parent, String label) {
        this.listeners = listeners;
        this.parent = parent;
        this.label = label;
    }

    @Override
    public TreeItem getParent() {
        return parent;
    }

    @Override
    public TreeModelListeners getListeners() {
        return listeners;
    }

    @Override
    public String getLabel() {
        return label;
    }

    protected T getChild(K key) {
        return children.get(key);
    }

    protected T putChild(K key, T value) {
        T answer = children.put(key, value);
        if (answer == null) {
            getListeners().itemAdded(value);
        } else {
            getListeners().itemUpdated(value);
        }
        return answer;
    }

    protected void addChild(K key, T value) {
        children.put(key, value);
        getListeners().itemAdded(value);
    }

    protected T removeChild(K key) {
        T answer = children.remove(key);
        if (answer != null) {
            getListeners().itemDeleted(answer);
        }
        return answer;
    }

    public List getChildren() {
        return new ArrayList(children.values());
    }
}