From 2bd6b46c35d21040034b8ec3f87bd6eb1b83c541 Mon Sep 17 00:00:00 2001
From: Alessandro Iezzi <aiezzi@alessandroiezzi.it>
Date: Tue, 10 May 2022 11:38:46 +0200
Subject: Initial commit

---
 src/main/java/it/alessandroiezzi/csv/CSVUtils.java | 70 ++++++++++++++++++++++
 1 file changed, 70 insertions(+)
 create mode 100644 src/main/java/it/alessandroiezzi/csv/CSVUtils.java

(limited to 'src/main')

diff --git a/src/main/java/it/alessandroiezzi/csv/CSVUtils.java b/src/main/java/it/alessandroiezzi/csv/CSVUtils.java
new file mode 100644
index 0000000..4f74030
--- /dev/null
+++ b/src/main/java/it/alessandroiezzi/csv/CSVUtils.java
@@ -0,0 +1,70 @@
+/*
+ * A simple CSV utility
+ * Copyright (C) 2022  Alessandro Iezzi <aiezzi AT alessandroiezzi DOT it>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package it.alessandroiezzi.csv;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class CSVUtils {
+    private final InputStream csvFile;
+
+    public CSVUtils(InputStream csvFile) {
+        this.csvFile = csvFile;
+    }
+
+    public List<Map<String, String>> parse() throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(csvFile));
+        List<Map<String, String>> records = new ArrayList<>();
+        String line;
+        String[] header = null;
+
+        // Legge l'intestazione
+        if ((line = br.readLine()) != null) {
+            line = line.endsWith(COMMA_DELIMITER) ? line.substring(0, line.length() - 1) : line;
+            header = line.replace("\"", "").split(COMMA_DELIMITER);
+        }
+
+        if (header == null || header.length == 0)
+            return records;
+
+        // Procede a leggere i dati
+        while ((line = br.readLine()) != null) {
+            line = line.endsWith(COMMA_DELIMITER) ? line.substring(0, line.length() - 1) : line;
+            String[] values = line.replace("\"", "").split(COMMA_DELIMITER, -1);
+
+            Map<String, String> data = new HashMap<>();
+            if (values.length != header.length) {
+                throw new RuntimeException("Il numero di campi definiti nella testata non corrisponde con le colonne dei dati");
+            }
+            for (int j = 0; j < header.length; j++) {
+                data.put(header[j], values[j]);
+            }
+            records.add(data);
+        }
+
+        return records;
+    }
+
+    private final String COMMA_DELIMITER = ";";
+}
-- 
cgit v1.2.3