001package org.hl7.fhir.r5.openapi;
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;
038
039import org.hl7.fhir.utilities.FileUtilities;
040import org.hl7.fhir.utilities.MarkedToMoveToAdjunctPackage;
041
042import com.google.gson.Gson;
043import com.google.gson.GsonBuilder;
044import com.google.gson.JsonObject;
045import com.google.gson.JsonParser;
046import com.google.gson.JsonSyntaxException;
047
048@MarkedToMoveToAdjunctPackage
049public class Writer extends BaseWriter {
050
051  private OutputStream stream;
052  
053  public Writer(OutputStream stream) {
054    super( new JsonObject());
055    this.stream = stream;
056    object.addProperty("openapi", "3.0.2");
057  }
058  
059  public Writer(OutputStream stream, InputStream template) throws JsonSyntaxException, IOException {
060    super(parse(template));
061    this.stream = stream;
062    object.addProperty("openapi", "3.0.2");
063  }
064  
065  private static JsonObject parse(InputStream template) throws JsonSyntaxException, IOException {
066    JsonParser parser = new com.google.gson.JsonParser();
067    return parser.parse(FileUtilities.streamToString(template)).getAsJsonObject();
068  }
069
070  public void commit() throws IOException {
071    Gson gson = new GsonBuilder().setPrettyPrinting().create();
072    String json = gson.toJson(object);
073    OutputStreamWriter sw = new OutputStreamWriter(stream, "UTF-8");
074    sw.write('\ufeff');  // Unicode BOM, translates to UTF-8 with the configured outputstreamwriter
075    sw.write(json);
076    sw.flush();
077    sw.close();
078  }  
079
080  public InfoWriter info() {
081    return new InfoWriter(ensureObject("info"));
082  }
083
084  public PathItemWriter path(String path) {
085    return new PathItemWriter(ensureMapObject("paths", path));
086  }
087
088  public Writer pathRef(String path, String url) {
089    ensureMapObject("paths", path).addProperty("$ref", url);
090    return this;
091  }
092
093
094  public ServerWriter server(String url) {
095    return new ServerWriter(ensureArrayObject("servers", "url", url)); 
096  }
097   
098
099  public TagWriter tag(String name) {
100    return new TagWriter(ensureArrayObject("tags", "name", name)); 
101  }
102   
103  public ExternalDocsWriter externalDocs() {
104    return new ExternalDocsWriter(ensureObject("externalDocs"));            
105  }
106
107
108  public ComponentsWriter components() {
109    return new ComponentsWriter(ensureObject("components"));
110  }
111
112}