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