Source code

001package org.hl7.fhir.dstu2016may.metamodel;
002
003/*
004  Copyright (c) 2011+, HL7, Inc.
005  All rights reserved.
006  
007  Redistribution and use in source and binary forms, with or without modification, 
008  are permitted provided that the following conditions are met:
009    
010   * Redistributions of source code must retain the above copyright notice, this 
011     list of conditions and the following disclaimer.
012   * Redistributions in binary form must reproduce the above copyright notice, 
013     this list of conditions and the following disclaimer in the documentation 
014     and/or other materials provided with the distribution.
015   * Neither the name of HL7 nor the names of its contributors may be used to 
016     endorse or promote products derived from this software without specific 
017     prior written permission.
018  
019  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
020  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
021  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
022  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
023  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
024  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
025  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
026  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
027  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
028  POSSIBILITY OF SUCH DAMAGE.
029  
030 */
031
032
033
034import java.io.IOException;
035import java.io.InputStream;
036import java.io.OutputStream;
037import java.io.OutputStreamWriter;
038import java.math.BigDecimal;
039import java.util.HashSet;
040import java.util.List;
041import java.util.Set;
042
043import org.apache.commons.lang3.NotImplementedException;
044import org.hl7.fhir.dstu2016may.formats.IParser.OutputStyle;
045import org.hl7.fhir.dstu2016may.formats.JsonCreator;
046import org.hl7.fhir.dstu2016may.formats.JsonCreatorCanonical;
047import org.hl7.fhir.dstu2016may.formats.JsonCreatorGson;
048import org.hl7.fhir.dstu2016may.utils.IWorkerContext;
049import org.hl7.fhir.utilities.Utilities;
050
051public class JsonLDParser extends ParserBase {
052
053        private JsonCreator json;
054  private String base;
055
056        public JsonLDParser(IWorkerContext context) {
057                super(context);
058        }
059
060        @Override
061        public Element parse(InputStream stream) throws Exception {
062                throw new NotImplementedException("not done yet");
063        }
064
065
066        protected void prop(String name, String value) throws IOException {
067                if (name != null)
068                        json.name(name);
069                json.value(value);
070        }
071
072        protected void open(String name) throws IOException {
073                if (name != null) 
074                        json.name(name);
075                json.beginObject();
076        }
077
078        protected void close() throws IOException {
079                json.endObject();
080        }
081
082        protected void openArray(String name) throws IOException {
083                if (name != null) 
084                        json.name(name);
085                json.beginArray();
086        }
087
088        protected void closeArray() throws IOException {
089                json.endArray();
090        }
091
092
093        @Override
094        public void compose(Element e, OutputStream stream, OutputStyle style, String base) throws Exception {
095          this.base = base;
096                OutputStreamWriter osw = new OutputStreamWriter(stream, "UTF-8");
097                if (style == OutputStyle.CANONICAL)
098                        json = new JsonCreatorCanonical(osw);
099                else
100                        json = new JsonCreatorGson(osw);
101                json.setIndent(style == OutputStyle.PRETTY ? "  " : "");
102                json.beginObject();
103    prop("@context", "http://hl7.org/fhir/jsonld/"+e.getType());
104                prop("resourceType", e.getType());
105                Set<String> done = new HashSet<String>();
106                for (Element child : e.getChildren()) {
107                        compose(e.getName(), e, done, child);
108                }
109                json.endObject();
110                json.finish();
111                osw.flush();
112        }
113
114        private void compose(String path, Element e, Set<String> done, Element child) throws IOException {
115                if (!child.getProperty().isList()) {
116                        compose(path, child);
117                } else if (!done.contains(child.getName())) {
118                        done.add(child.getName());
119                        List<Element> list = e.getChildrenByName(child.getName());
120                        composeList(path, list);
121                }
122        }
123
124        private void composeList(String path, List<Element> list) throws IOException {
125                // there will be at least one element
126    String en = list.get(0).getProperty().getDefinition().getBase().getPath();
127    if (en == null) 
128      en = list.get(0).getProperty().getDefinition().getPath();
129    boolean doType = false;
130    if (en.endsWith("[x]")) {
131      en = en.substring(0, en.length()-3);
132      doType = true;        
133    }
134    if (doType)
135      en = en + Utilities.capitalize(list.get(0).getType());
136
137    openArray(en);
138    for (Element item : list) { 
139      open(null);
140      if (item.isPrimitive() || ParserBase.isPrimitive(item.getType())) {
141        if (item.hasValue())
142          primitiveValue(item);
143      }
144      Set<String> done = new HashSet<String>();
145      for (Element child : item.getChildren()) {
146        compose(path+"."+item.getName(), item, done, child);
147      }
148      close();
149    }
150    closeArray();
151        }
152
153        private void primitiveValue(Element item) throws IOException {
154                json.name("value");
155          String type = item.getType();
156          if (Utilities.existsInList(type, "boolean"))
157                json.value(item.getValue().equals("true") ? new Boolean(true) : new Boolean(false));
158          else if (Utilities.existsInList(type, "integer", "unsignedInt", "positiveInt"))
159                json.value(new Integer(item.getValue()));
160          else if (Utilities.existsInList(type, "decimal"))
161                json.value(new BigDecimal(item.getValue()));
162          else
163                json.value(item.getValue());    
164        }
165
166        private void compose(String path, Element element) throws IOException {
167    String en = element.getProperty().getDefinition().getBase().getPath();
168    if (en == null) 
169      en = element.getProperty().getDefinition().getPath();
170    boolean doType = false;
171    if (en.endsWith("[x]")) {
172      en = en.substring(0, en.length()-3);
173      doType = true;        
174    }
175    if (doType)
176      en = en + Utilities.capitalize(element.getType());
177
178    if (element.hasChildren() || element.hasComments() || element.hasValue()) {
179                        open(en);
180                          
181            if (element.isPrimitive() || ParserBase.isPrimitive(element.getType())) {
182              if (element.hasValue())
183                primitiveValue(element);
184            }
185                        if (element.getProperty().isResource()) {
186                    prop("resourceType", element.getType());
187                                element = element.getChildren().get(0);
188                        }
189                        Set<String> done = new HashSet<String>();
190                        for (Element child : element.getChildren()) {
191                                compose(path+"."+element.getName(), element, done, child);
192                        }
193            if ("Coding".equals(element.getType()))
194              decorateCoding(element);
195      if ("CodeableConcept".equals(element.getType()))
196        decorateCodeableConcept(element);
197      if ("Reference".equals(element.getType()))
198        decorateReference(element);
199                        
200                        close();
201                }
202        }
203
204  private void decorateReference(Element element) throws IOException {
205    String ref = element.getChildValue("reference");
206    if (ref != null && (ref.startsWith("http://") || ref.startsWith("https://"))) {
207      json.name("reference");
208      json.value(ref);
209    } else if (base != null && ref != null && ref.contains("/")) {
210      json.name("reference");
211      json.value(base+"/"+ref);
212    }
213  }
214
215  protected void decorateCoding(Element coding) throws IOException {
216    String system = coding.getChildValue("system");
217    String code = coding.getChildValue("code");
218    
219    if (system == null)
220      return;
221    if ("http://snomed.info/sct".equals(system)) {
222      json.name("concept");
223      json.value("http://snomed.info/sct#"+code);
224    } else if ("http://loinc.org".equals(system)) {
225      json.name("concept");
226      json.value("http://loinc.org/rdf#"+code);
227    }  
228  }
229
230  private void decorateCodeableConcept(Element element) throws IOException {
231    for (Element c : element.getChildren("coding")) {
232      decorateCoding(c);
233    }
234  }
235        
236}