001package org.hl7.fhir.utilities;
002
003/*-
004 * #%L
005 * org.hl7.fhir.utilities
006 * %%
007 * Copyright (C) 2014 - 2019 Health Level 7
008 * %%
009 * Licensed under the Apache License, Version 2.0 (the "License");
010 * you may not use this file except in compliance with the License.
011 * You may obtain a copy of the License at
012 * 
013 *      http://www.apache.org/licenses/LICENSE-2.0
014 * 
015 * Unless required by applicable law or agreed to in writing, software
016 * distributed under the License is distributed on an "AS IS" BASIS,
017 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
018 * See the License for the specific language governing permissions and
019 * limitations under the License.
020 * #L%
021 */
022
023
024import java.io.IOException;
025import java.io.OutputStream;
026import java.io.UnsupportedEncodingException;
027
028public class CSVWriter extends TextStreamWriter {
029
030  public CSVWriter(OutputStream out) throws UnsupportedEncodingException {
031    super(out);
032  }
033
034  protected String csvEscape(String s) {
035    if (s==null)
036      return "";
037    else if (s.contains("\""))
038      return s.substring(0,s.indexOf("\"")) + "\"" + csvEscape(s.substring(s.indexOf("\"")+1));
039    else if (s.contains(","))
040      return "\""+s+"\"";
041    else
042      return s;
043  }
044  
045
046  public void line(String... fields) throws IOException {
047    StringBuilder b = new StringBuilder();
048    boolean first = true;
049    for (String s : fields) {
050      if (first)
051        first = false;
052      else
053        b.append(",");
054      b.append(csvEscape(s));
055    }
056    ln(b.toString());
057  }
058  
059}