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/*
 * Copyright 2008 Google Inc.
 *
 * 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.google.gwt.uibinder.rebind;

import com.google.gwt.core.ext.UnableToCompleteException;

import org.w3c.dom.CDATASection;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.Text;

/**
 * Traverses the children of a {@link Node}.
 */
class ChildWalker {

  /**
   * Take a {@link NodeVisitor} and show it each child of the given {@link Node}
   * that is of a type relevant to our templates.
   * 

* Note that this is not a recursive call, though the visitor itself may * choose to recurse * * @throws UnableToCompleteException */ void accept(Node n, NodeVisitor v) throws UnableToCompleteException { NodeList childNodes = n.getChildNodes(); for (int i = 0; i < childNodes.getLength(); ++i) { Node child = childNodes.item(i); switch (child.getNodeType()) { case Node.ELEMENT_NODE: v.visitElement((Element) child); break; case Node.TEXT_NODE: v.visitText((Text) child); break; case Node.COMMENT_NODE: // Ditch comment nodes. break; case Node.CDATA_SECTION_NODE: v.visitCData((CDATASection) child); break; case Node.ENTITY_NODE: case Node.ENTITY_REFERENCE_NODE: case Node.ATTRIBUTE_NODE: case Node.DOCUMENT_NODE: case Node.DOCUMENT_FRAGMENT_NODE: case Node.NOTATION_NODE: case Node.PROCESSING_INSTRUCTION_NODE: default: { // None of these are expected node types. throw new RuntimeException("Unexpected XML node"); } } } } }





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