001package org.hl7.fhir.utilities;
002
003import java.util.List;
004
005/*
006  Copyright (c) 2011+, HL7, Inc.
007  All rights reserved.
008  
009  Redistribution and use in source and binary forms, with or without modification, 
010  are permitted provided that the following conditions are met:
011    
012   * Redistributions of source code must retain the above copyright notice, this 
013     list of conditions and the following disclaimer.
014   * Redistributions in binary form must reproduce the above copyright notice, 
015     this list of conditions and the following disclaimer in the documentation 
016     and/or other materials provided with the distribution.
017   * Neither the name of HL7 nor the names of its contributors may be used to 
018     endorse or promote products derived from this software without specific 
019     prior written permission.
020  
021  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
022  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
023  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
024  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
025  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
026  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
027  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
028  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
029  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
030  POSSIBILITY OF SUCH DAMAGE.
031  
032 */
033
034
035
036/**
037 * Encapsulates StringBuilder to build strings of values separated by comma
038 * @author Ewout
039 */
040
041public class CommaSeparatedStringBuilder {
042
043  boolean first = true;
044  String sep = ", ";
045  StringBuilder b = new StringBuilder();
046  int count = 0;
047
048  public CommaSeparatedStringBuilder() {
049  }
050  
051  public CommaSeparatedStringBuilder(String sep) {
052    this.sep = sep;
053  }
054
055  public void append(String value) {
056    if (!first)
057      b.append(sep);
058    b.append(value);
059    first = false;
060    count++;    
061  }
062  
063  public int length() {
064    return b.length();
065  }
066  
067  public int count() {
068    return count;
069  }
070
071  @Override
072  public String toString() {
073    return b.toString();
074  }
075
076  public void appendIfNotNull(String s) {
077   if (!Utilities.noString(s))
078     append(s);
079    
080  }
081
082  public void addAll(List<String> list) {
083    for (String s : list) {
084      append(s);
085    }
086    
087  }
088}