Initial commit with all the necessary files
[aai/aai-common.git] / aai-core / src / main / java / org / openecomp / aai / util / AAICSVWriter.java
1 /*-
2  * ============LICENSE_START=======================================================
3  * org.openecomp.aai
4  * ================================================================================
5  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
6  * ================================================================================
7  * Licensed under the Apache License, Version 2.0 (the "License");
8 you may not use this file except in compliance with the License.
9 You may obtain a copy of the License at
10
11      http://www.apache.org/licenses/LICENSE-2.0
12
13 Unless required by applicable law or agreed to in writing, software
14 distributed under the License is distributed on an "AS IS" BASIS,
15 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 See the License for the specific language governing permissions and
17 limitations under the License.
18  * ============LICENSE_END=========================================================
19  */
20
21 /**
22  * 
23  */
24 package org.openecomp.aai.util;
25
26 import java.io.IOException;
27 import java.io.PrintWriter;
28 import java.io.Writer;
29
30 import com.opencsv.CSVWriter;
31
32 /**
33  * had to overwrite the separate character to separate string
34  * Based on the public - A very simple CSV writer released under a commercial-friendly license.
35  *
36  
37  */
38 public class AAICSVWriter extends CSVWriter {
39
40         private String separatorStr;
41         private char overridequotechar;
42         private String overridelineEnd;
43         private Writer rawWriter;
44         private PrintWriter pw;
45            
46         /**
47          * Instantiates a new AAICSV writer.
48          *
49          * @param writer the writer
50          */
51         public AAICSVWriter(Writer writer) {
52                 super(writer);
53                 // TODO Auto-generated constructor stub
54         }
55
56          /**
57          * Constructs AAICSVWriter with supplied separator string and quote char.
58          *
59          * @param writer    the writer to an underlying CSV source.
60          * @param overrideseparator the overrideseparator
61          * @param quotechar the character to use for quoted elements
62          * @param lineEnd   the line feed terminator to use
63          */
64            public AAICSVWriter(Writer writer, String overrideseparator, char quotechar, String lineEnd) {
65               super(writer, CSVWriter.DEFAULT_SEPARATOR, quotechar, DEFAULT_ESCAPE_CHARACTER, lineEnd);
66               separatorStr = overrideseparator;
67               overridequotechar = quotechar;
68               overridelineEnd = lineEnd;
69               this.rawWriter = writer;
70               this.pw = new PrintWriter(writer);
71            }
72            
73            /**
74          * String contains special characters.
75          *
76          * @param line the line
77          * @return true, if successful
78          */
79         private boolean stringContainsSpecialCharacters(String line) {
80                       return line.indexOf(overridequotechar) != -1 || line.indexOf(DEFAULT_ESCAPE_CHARACTER) != -1 || line.indexOf(separatorStr) != -1 || line.contains("\n") || line.contains("\r");
81                    }
82            
83            /**
84             * Close the underlying stream writer flushing any buffered content.
85             *
86             * @throws IOException if bad things happen
87             */
88            public void close() throws IOException {
89               flush();
90               pw.close();
91               rawWriter.close();
92            }
93            
94         /**
95             * Writes the next line to the file.
96             *
97             * @param nextLine         a string array with each comma-separated element as a separate
98             *                         entry.
99             * @param applyQuotesToAll true if all values are to be quoted.  false applies quotes only
100             *                         to values which contain the separator, escape, quote or new line characters.
101             */
102            public void writeNext(String[] nextLine, boolean applyQuotesToAll) {
103
104               if (nextLine == null)
105                  return;
106
107               StringBuilder sb = new StringBuilder(INITIAL_STRING_SIZE);
108               for (int i = 0; i < nextLine.length; i++) {
109
110                  if (i != 0) {
111                     sb.append(separatorStr);
112                  }
113
114                  String nextElement = nextLine[i];
115
116                  if (nextElement == null)
117                     continue;
118
119                  Boolean stringContainsSpecialCharacters = stringContainsSpecialCharacters(nextElement);
120
121                  if ((applyQuotesToAll || stringContainsSpecialCharacters) && overridequotechar != NO_QUOTE_CHARACTER)
122                     sb.append(overridequotechar);
123
124                  if (stringContainsSpecialCharacters) {
125                     sb.append(processLine(nextElement));
126                  } else {
127                     sb.append(nextElement);
128                  }
129
130                  if ((applyQuotesToAll || stringContainsSpecialCharacters) && overridequotechar != NO_QUOTE_CHARACTER)
131                     sb.append(overridequotechar);
132               }
133
134               sb.append(overridelineEnd);
135               pw.write(sb.toString());
136            }
137
138            
139            /**
140          * Writes the next line to the file ignoring all exceptions.
141          *
142          * @param nextLine         a string array with each comma-separated element as a separate
143          *                         entry.
144          */
145            public void writeColumn(String[] nextLine) {
146
147               if (nextLine == null)
148                  return;
149
150               StringBuilder sb = new StringBuilder(INITIAL_STRING_SIZE);
151               for (int i = 0; i < nextLine.length; i++) {
152
153
154                  String nextElement = nextLine[i];
155
156                  if (nextElement == null)
157                     continue;
158
159              sb.append(nextElement);
160                  
161
162               }
163
164               sb.append(overridelineEnd);
165               pw.write(sb.toString());
166            }
167 }