summaryrefslogtreecommitdiff
path: root/src/CSVReader.java
diff options
context:
space:
mode:
authorArghKevin <kagheli@student.sdccd.edu>2024-05-20 05:42:37 -0700
committerArghKevin <kagheli@student.sdccd.edu>2024-05-20 05:42:37 -0700
commit583ecf2df556c0bb3ae5468a63d9231b3ef56f58 (patch)
tree32aadcfbd21d79e34eb7d228f8b6e76dce9c0158 /src/CSVReader.java
parentae99f9afc615bfd6f4dd0b6d6f7847928956a318 (diff)
Weeks 5 and 6.
Diffstat (limited to 'src/CSVReader.java')
-rw-r--r--src/CSVReader.java35
1 files changed, 28 insertions, 7 deletions
diff --git a/src/CSVReader.java b/src/CSVReader.java
index fa588ef..3666531 100644
--- a/src/CSVReader.java
+++ b/src/CSVReader.java
@@ -17,14 +17,15 @@ import java.util.Arrays;
*/
public class CSVReader extends Reader {
- String[] header; // A CSV file has-a header. One line, multiple fields.
- /* Array of Hash map from header to value for each
- line past the header. */
- ArrayList<HashMap<String,String>> body; // A CSV file has-a body. Multiple lines, multiple fields.
+ private String[] header; // A CSV file has-a header. One line, multiple fields.
+ // Array of HashMaps. Headers are keys, values are on each line of the CSV following the header.
+ private ArrayList<HashMap<String,String>> body; // A CSV file has-a body. Multiple lines, multiple fields.
public CSVReader(File file) {
super(file); // Call parent constructor
+ /* Construct the body to be filled. */
body = new ArrayList<HashMap<String,String>>();
+ /* Parse the contents of the file, store in body. */
parse();
}
@@ -32,26 +33,46 @@ public class CSVReader extends Reader {
* Parse CSV file.
*/
public void parse() {
+ /* Split the input on newlines. */
String[] lines = this.getContents().split("\n");
+ /* Split the first line by commas, assign to header array. */
this.header = lines[0].split(",");
- /* Iterate over all lines of the body. */
+ /* Iterate over all lines of the body.
+ First line is header, count from 1 instead of 0. */
for (int i = 1; i < lines.length; i++) {
+ /* Some lines have commas within parentheses.
+ Angkor,"/South East Asian (Thai, Khmer, Lao)/Looped",100
+ Remove everything within parentheses. We need to escape
+ not on a language level, but on a function call level.
+ Double-backslash for a literal backslash, which is then
+ used to escape the parentheses in the regex library. */
+ lines[i] = lines[i].replaceAll("\\(.*\\)", "");
+
+ /* CSV, Comma-Separated Values. */
String[] fields = lines[i].split(",");
+ /* Allocate a new HashMap for the given line of the CSV. */
HashMap<String,String> map = new HashMap<String,String>();
- /* For each of the columns, add the associated
- value in this row. */
+
+ /* Associate each of the line's fields with its header. */
for (int j = 0; j < header.length; j++) {
map.put(header[j], fields[j]);
}
+ /* Add the HashMap to the list. */
body.add(map);
}
}
+ /**
+ * @return the length of the body.
+ */
public int getLength() {
return body.size();
}
+ /**
+ * @return the value associated with the given key on the given line.
+ */
public String get(int i, String key) {
return body.get(i).get(key);
}