content: /*
   * Copyright 2012 Atteo.
   *
   * 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 org.flashtool.xmlcombiner;
  
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.List;
  
  import org.w3c.dom.Document;
  import org.w3c.dom.Element;
  import org.w3c.dom.Node;
  import org.w3c.dom.NodeList;
  
  /**
   * DOM {@link Element} with any other non-element nodes which precede it.
   */
  import lombok.extern.slf4j.Slf4j;
  
  @Slf4j
  class Context {
  	public static final String KEYS_ATTRIBUTE_NAME = "combine.keys";
  	public static final String ID_ATTRIBUTE_NAME = "combine.id";
  	private final List<Node> neighbours = new ArrayList<>();
  	private Element element;
  
  	public Context() {
  	}
  
  	public static Context fromElement(Element element) {
  		Context context = new Context();
  		context.setElement(element);
  		return context;
  	}
  
  	public void addNeighbour(Node node) {
  		neighbours.add(node);
  	}
  
  	public List<Node> getNeighbours() {
  		return neighbours;
  	}
  
  	public void setElement(Element element) {
  		this.element = element;
  	}
  
  	public Element getElement() {
  		return element;
  	}
  
  	public void addAsChildTo(Node node) {
  		for (Node neighbour : neighbours) {
  			node.appendChild(neighbour);
  		}
  		node.appendChild(element);
  	}
  
  	public void addAsChildTo(Node node, Document document) {
  		for (Node neighbour : neighbours) {
  			node.appendChild(document.importNode(neighbour, true));
  		}
  		if (element != null) {
  			node.appendChild(document.importNode(element, true));
  		}
  	}
  
  	public List<Context> groupChildContexts() {
  		if (element == null) {
  			return Collections.emptyList();
  		}
  		NodeList nodes = element.getChildNodes();
  		List<Context> contexts = new ArrayList<>(nodes.getLength());
  
  		Context context = new Context();
  		for (int i = 0; i < nodes.getLength(); i++) {
  			Node node = nodes.item(i);
  			if (node instanceof Element) {
  				context.setElement((Element) node);
  				contexts.add(context);
  				context = new Context();
  			} else {
  				context.addNeighbour(node);
  			}
  		}
  		// add last with empty element
  		contexts.add(context);
  		return contexts;
  	}
  
  	@Override
  	public String toString() {
  		return "[" + neighbours + ", " + element + "]";
  	}
  }
  