001/*
002Copyright (c) 2011+, HL7, Inc
003All rights reserved.
004
005Redistribution and use in source and binary forms, with or without modification, 
006are permitted provided that the following conditions are met:
007
008 * Redistributions of source code must retain the above copyright notice, this 
009   list of conditions and the following disclaimer.
010 * Redistributions in binary form must reproduce the above copyright notice, 
011   this list of conditions and the following disclaimer in the documentation 
012   and/or other materials provided with the distribution.
013 * Neither the name of HL7 nor the names of its contributors may be used to 
014   endorse or promote products derived from this software without specific 
015   prior written permission.
016
017THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
018ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
019WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
020IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
021INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
022NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
023PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
024WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
025ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
026POSSIBILITY OF SUCH DAMAGE.
027
028*/
029package org.hl7.fhir.utilities.xml;
030
031/*-
032 * #%L
033 * org.hl7.fhir.utilities
034 * %%
035 * Copyright (C) 2014 - 2019 Health Level 7
036 * %%
037 * Licensed under the Apache License, Version 2.0 (the "License");
038 * you may not use this file except in compliance with the License.
039 * You may obtain a copy of the License at
040 * 
041 *      http://www.apache.org/licenses/LICENSE-2.0
042 * 
043 * Unless required by applicable law or agreed to in writing, software
044 * distributed under the License is distributed on an "AS IS" BASIS,
045 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
046 * See the License for the specific language governing permissions and
047 * limitations under the License.
048 * #L%
049 */
050
051
052import java.io.ByteArrayOutputStream;
053import java.io.File;
054import java.io.FileOutputStream;
055import java.io.IOException;
056import java.io.OutputStream;
057
058import org.hl7.fhir.exceptions.FHIRException;
059import org.w3c.dom.Comment;
060import org.w3c.dom.DOMException;
061import org.w3c.dom.Element;
062import org.w3c.dom.NamedNodeMap;
063import org.w3c.dom.Node;
064
065public class XmlGenerator {
066
067
068        private XMLWriter xml;
069        
070        public void generate(Element element, File file, String defaultNamespace, String elementName) throws FHIRException, IOException  {
071                
072                OutputStream stream = new FileOutputStream(file);
073                
074                
075                xml = new XMLWriter(stream, "UTF-8");
076                xml.start();
077                xml.setDefaultNamespace(defaultNamespace);
078
079                xml.enter(defaultNamespace, elementName);
080                processContents(element);
081                xml.exit();
082                xml.end();
083                xml.flush();
084                stream.close();
085        }
086        
087  public String generate(Element element) throws IOException, FHIRException  {
088    ByteArrayOutputStream stream = new ByteArrayOutputStream();
089    generate(element, stream);
090    return new String(stream.toByteArray());
091  } 
092  
093        public void generate(Element element, File file) throws IOException, FHIRException  {
094                OutputStream stream = new FileOutputStream(file);
095                generate(element, stream);
096        }       
097        
098        public void generate(Element element, OutputStream stream) throws IOException, FHIRException  {
099                xml = new XMLWriter(stream, "UTF-8");
100                xml.start();
101                xml.setDefaultNamespace(element.getNamespaceURI());
102                processElement(element);
103                xml.end();
104        }
105        
106        private void processContents(Element element) throws FHIRException, IOException  {
107                Node node = element.getFirstChild();
108                while (node != null) {
109                        switch (node.getNodeType()) {
110                        case Node.ELEMENT_NODE:
111                                processElement((Element) node);
112                                break;
113                        case Node.TEXT_NODE:
114                                processText(node);
115                                break;
116                        case Node.COMMENT_NODE:
117                                processComment((Comment) node);
118                                break;
119                        default:
120                                throw new FHIRException("unhandled node type "+Integer.toString(node.getNodeType()));
121                        }
122                                
123                    node = node.getNextSibling();
124                }
125        }
126        
127        private void processComment(Comment node) throws DOMException, IOException  {
128                xml.comment(node.getNodeValue(), true);
129        }
130
131        private void processElement(Element element) throws IOException, FHIRException  {
132                if (!xml.getDefaultNamespace().equals(element.getNamespaceURI()))
133                        xml.setDefaultNamespace(element.getNamespaceURI());
134
135                processAttributes(element);
136                xml.enter(element.getNamespaceURI(), element.getLocalName());
137        
138                processContents(element);
139                
140                xml.exit();
141        }
142
143        private void processText(Node node) throws DOMException, IOException  {
144                xml.text(node.getNodeValue());
145        }
146
147        private void processAttributes(Element element) throws DOMException, IOException  {
148                NamedNodeMap nodes = element.getAttributes();
149                for (int i = 0; i < nodes.getLength(); i++) {
150                        Node attr = nodes.item(i);
151                        if (attr.getNamespaceURI() != null) {
152                                //xml.namespace(attr.getNamespaceURI());
153                        //xml.attribute(attr.getNamespaceURI(), attr.getLocalName(), attr.getNodeValue());
154                        } else if (attr.getLocalName() != null)
155//        xml.attribute("xmlns", attr.getNodeValue());
156//                      else
157                        xml.attribute(attr.getLocalName(), attr.getNodeValue());
158                        else if (attr.getNodeName() != null && !"xmlns".equals(attr.getNodeName()))
159        xml.attribute(attr.getNodeName(), attr.getNodeValue());
160                }
161                
162        }
163
164
165}