| /* |
| * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.tools.internal.xjc.reader.dtd.bindinfo; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| import org.w3c.dom.NodeList; |
| |
| /** |
| * @author Kohsuke Kawaguchi |
| */ |
| public final class DOMUtil { |
| final static String getAttribute(Element e,String attName) { |
| if(e.getAttributeNode(attName)==null) return null; |
| return e.getAttribute(attName); |
| } |
| |
| public static String getAttribute(Element e, String nsUri, String local) { |
| if(e.getAttributeNodeNS(nsUri,local)==null) return null; |
| return e.getAttributeNS(nsUri,local); |
| } |
| |
| public static Element getElement(Element e, String nsUri, String localName) { |
| NodeList l = e.getChildNodes(); |
| for(int i=0;i<l.getLength();i++) { |
| Node n = l.item(i); |
| if(n.getNodeType()==Node.ELEMENT_NODE) { |
| Element r = (Element)n; |
| if(equals(r.getLocalName(),localName) && equals(fixNull(r.getNamespaceURI()),nsUri)) |
| return r; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Used for defensive string comparisons, as many DOM methods often return null |
| * depending on how they are created. |
| */ |
| private static boolean equals(String a,String b) { |
| if(a==b) return true; |
| if(a==null || b==null) return false; |
| return a.equals(b); |
| } |
| |
| /** |
| * DOM API returns null for the default namespace whereas it should return "". |
| */ |
| private static String fixNull(String s) { |
| if(s==null) return ""; |
| else return s; |
| } |
| |
| public static Element getElement(Element e, String localName) { |
| return getElement(e,"",localName); |
| } |
| |
| public static List<Element> getChildElements(Element e) { |
| List<Element> r = new ArrayList<Element>(); |
| NodeList l = e.getChildNodes(); |
| for(int i=0;i<l.getLength();i++) { |
| Node n = l.item(i); |
| if(n.getNodeType()==Node.ELEMENT_NODE) |
| r.add((Element)n); |
| } |
| return r; |
| } |
| |
| public static List<Element> getChildElements(Element e,String localName) { |
| List<Element> r = new ArrayList<Element>(); |
| NodeList l = e.getChildNodes(); |
| for(int i=0;i<l.getLength();i++) { |
| Node n = l.item(i); |
| if(n.getNodeType()==Node.ELEMENT_NODE) { |
| Element c = (Element)n; |
| if(c.getLocalName().equals(localName)) |
| r.add(c); |
| } |
| } |
| return r; |
| } |
| } |