* delimited text is a very popular format for data interchange. It is
* understood by most database, spreadsheet, and organizer programs.
* <p>
- * Each row of text represents a row in a table or a data record. Each row
- * ends with a NEWLINE character. Each row contains one or more values.
- * Values are separated by commas. A value can contain any character except
- * for comma, unless is is wrapped in single quotes or double quotes.
+ * Each row of text represents a row in a table or a data record. Each row ends
+ * with a NEWLINE character. Each row contains one or more values. Values are
+ * separated by commas. A value can contain any character except for comma,
+ * unless is is wrapped in single quotes or double quotes.
* <p>
* The first row usually contains the names of the columns.
* <p>
- * A comma delimited list can be converted into a JSONArray of JSONObjects.
- * The names for the elements in the JSONObjects can be taken from the names
- * in the first row.
+ * A comma delimited list can be converted into a JSONArray of JSONObjects. The
+ * names for the elements in the JSONObjects can be taken from the names in the
+ * first row.
+ *
* @author JSON.org
* @version 2016-05-01
*/
-public class CDL {
+public class CDL
+{
- /**
- * Get the next value. The value can be wrapped in quotes. The value can
- * be empty.
- * @param x A JSONTokener of the source text.
- * @return The value string, or null if empty.
- * @throws JSONException if the quoted string is badly formed.
- */
- private static String getValue(JSONTokener x) throws JSONException {
- char c;
- char q;
- StringBuffer sb;
- do {
- c = x.next();
- } while (c == ' ' || c == '\t');
- switch (c) {
- case 0:
- return null;
- case '"':
- case '\'':
- q = c;
- sb = new StringBuffer();
- for (;;) {
- c = x.next();
- if (c == q) {
- //Handle escaped double-quote
- char nextC = x.next();
- if(nextC != '\"') {
- // if our quote was the end of the file, don't step
- if(nextC > 0) {
- x.back();
- }
- break;
- }
- }
- if (c == 0 || c == '\n' || c == '\r') {
- throw x.syntaxError("Missing close quote '" + q + "'.");
- }
- sb.append(c);
+ /**
+ * Get the next value. The value can be wrapped in quotes. The value can be
+ * empty.
+ *
+ * @param x
+ * A JSONTokener of the source text.
+ * @return The value string, or null if empty.
+ * @throws JSONException
+ * if the quoted string is badly formed.
+ */
+ private static String getValue(JSONTokener x) throws JSONException
+ {
+ char c;
+ char q;
+ StringBuffer sb;
+ do
+ {
+ c = x.next();
+ } while (c == ' ' || c == '\t');
+ switch (c)
+ {
+ case 0:
+ return null;
+ case '"':
+ case '\'':
+ q = c;
+ sb = new StringBuffer();
+ for (;;)
+ {
+ c = x.next();
+ if (c == q)
+ {
+ // Handle escaped double-quote
+ char nextC = x.next();
+ if (nextC != '\"')
+ {
+ // if our quote was the end of the file, don't step
+ if (nextC > 0)
+ {
+ x.back();
}
- return sb.toString();
- case ',':
- x.back();
- return "";
- default:
- x.back();
- return x.nextTo(',');
+ break;
+ }
}
+ if (c == 0 || c == '\n' || c == '\r')
+ {
+ throw x.syntaxError("Missing close quote '" + q + "'.");
+ }
+ sb.append(c);
+ }
+ return sb.toString();
+ case ',':
+ x.back();
+ return "";
+ default:
+ x.back();
+ return x.nextTo(',');
}
+ }
- /**
- * Produce a JSONArray of strings from a row of comma delimited values.
- * @param x A JSONTokener of the source text.
- * @return A JSONArray of strings.
- * @throws JSONException
- */
- public static JSONArray rowToJSONArray(JSONTokener x) throws JSONException {
- JSONArray ja = new JSONArray();
- for (;;) {
- String value = getValue(x);
- char c = x.next();
- if (value == null ||
- (ja.length() == 0 && value.length() == 0 && c != ',')) {
- return null;
- }
- ja.put(value);
- for (;;) {
- if (c == ',') {
- break;
- }
- if (c != ' ') {
- if (c == '\n' || c == '\r' || c == 0) {
- return ja;
- }
- throw x.syntaxError("Bad character '" + c + "' (" +
- (int)c + ").");
- }
- c = x.next();
- }
+ /**
+ * Produce a JSONArray of strings from a row of comma delimited values.
+ *
+ * @param x
+ * A JSONTokener of the source text.
+ * @return A JSONArray of strings.
+ * @throws JSONException
+ */
+ public static JSONArray rowToJSONArray(JSONTokener x) throws JSONException
+ {
+ JSONArray ja = new JSONArray();
+ for (;;)
+ {
+ String value = getValue(x);
+ char c = x.next();
+ if (value == null
+ || (ja.length() == 0 && value.length() == 0 && c != ','))
+ {
+ return null;
+ }
+ ja.put(value);
+ for (;;)
+ {
+ if (c == ',')
+ {
+ break;
}
+ if (c != ' ')
+ {
+ if (c == '\n' || c == '\r' || c == 0)
+ {
+ return ja;
+ }
+ throw x.syntaxError(
+ "Bad character '" + c + "' (" + (int) c + ").");
+ }
+ c = x.next();
+ }
}
+ }
- /**
- * Produce a JSONObject from a row of comma delimited text, using a
- * parallel JSONArray of strings to provides the names of the elements.
- * @param names A JSONArray of names. This is commonly obtained from the
- * first row of a comma delimited text file using the rowToJSONArray
- * method.
- * @param x A JSONTokener of the source text.
- * @return A JSONObject combining the names and values.
- * @throws JSONException
- */
- public static JSONObject rowToJSONObject(JSONArray names, JSONTokener x)
- throws JSONException {
- JSONArray ja = rowToJSONArray(x);
- return ja != null ? ja.toJSONObject(names) : null;
- }
+ /**
+ * Produce a JSONObject from a row of comma delimited text, using a parallel
+ * JSONArray of strings to provides the names of the elements.
+ *
+ * @param names
+ * A JSONArray of names. This is commonly obtained from the first row
+ * of a comma delimited text file using the rowToJSONArray method.
+ * @param x
+ * A JSONTokener of the source text.
+ * @return A JSONObject combining the names and values.
+ * @throws JSONException
+ */
+ public static JSONObject rowToJSONObject(JSONArray names, JSONTokener x)
+ throws JSONException
+ {
+ JSONArray ja = rowToJSONArray(x);
+ return ja != null ? ja.toJSONObject(names) : null;
+ }
- /**
- * Produce a comma delimited text row from a JSONArray. Values containing
- * the comma character will be quoted. Troublesome characters may be
- * removed.
- * @param ja A JSONArray of strings.
- * @return A string ending in NEWLINE.
- */
- public static String rowToString(JSONArray ja) {
- StringBuilder sb = new StringBuilder();
- for (int i = 0; i < ja.length(); i += 1) {
- if (i > 0) {
- sb.append(',');
- }
- Object object = ja.opt(i);
- if (object != null) {
- String string = object.toString();
- if (string.length() > 0 && (string.indexOf(',') >= 0 ||
- string.indexOf('\n') >= 0 || string.indexOf('\r') >= 0 ||
- string.indexOf(0) >= 0 || string.charAt(0) == '"')) {
- sb.append('"');
- int length = string.length();
- for (int j = 0; j < length; j += 1) {
- char c = string.charAt(j);
- if (c >= ' ' && c != '"') {
- sb.append(c);
- }
- }
- sb.append('"');
- } else {
- sb.append(string);
- }
+ /**
+ * Produce a comma delimited text row from a JSONArray. Values containing the
+ * comma character will be quoted. Troublesome characters may be removed.
+ *
+ * @param ja
+ * A JSONArray of strings.
+ * @return A string ending in NEWLINE.
+ */
+ public static String rowToString(JSONArray ja)
+ {
+ StringBuilder sb = new StringBuilder();
+ for (int i = 0; i < ja.length(); i += 1)
+ {
+ if (i > 0)
+ {
+ sb.append(',');
+ }
+ Object object = ja.opt(i);
+ if (object != null)
+ {
+ String string = object.toString();
+ if (string.length() > 0 && (string.indexOf(',') >= 0
+ || string.indexOf('\n') >= 0 || string.indexOf('\r') >= 0
+ || string.indexOf(0) >= 0 || string.charAt(0) == '"'))
+ {
+ sb.append('"');
+ int length = string.length();
+ for (int j = 0; j < length; j += 1)
+ {
+ char c = string.charAt(j);
+ if (c >= ' ' && c != '"')
+ {
+ sb.append(c);
}
+ }
+ sb.append('"');
}
- sb.append('\n');
- return sb.toString();
+ else
+ {
+ sb.append(string);
+ }
+ }
}
+ sb.append('\n');
+ return sb.toString();
+ }
- /**
- * Produce a JSONArray of JSONObjects from a comma delimited text string,
- * using the first row as a source of names.
- * @param string The comma delimited text.
- * @return A JSONArray of JSONObjects.
- * @throws JSONException
- */
- public static JSONArray toJSONArray(String string) throws JSONException {
- return toJSONArray(new JSONTokener(string));
- }
+ /**
+ * Produce a JSONArray of JSONObjects from a comma delimited text string,
+ * using the first row as a source of names.
+ *
+ * @param string
+ * The comma delimited text.
+ * @return A JSONArray of JSONObjects.
+ * @throws JSONException
+ */
+ public static JSONArray toJSONArray(String string) throws JSONException
+ {
+ return toJSONArray(new JSONTokener(string));
+ }
- /**
- * Produce a JSONArray of JSONObjects from a comma delimited text string,
- * using the first row as a source of names.
- * @param x The JSONTokener containing the comma delimited text.
- * @return A JSONArray of JSONObjects.
- * @throws JSONException
- */
- public static JSONArray toJSONArray(JSONTokener x) throws JSONException {
- return toJSONArray(rowToJSONArray(x), x);
- }
+ /**
+ * Produce a JSONArray of JSONObjects from a comma delimited text string,
+ * using the first row as a source of names.
+ *
+ * @param x
+ * The JSONTokener containing the comma delimited text.
+ * @return A JSONArray of JSONObjects.
+ * @throws JSONException
+ */
+ public static JSONArray toJSONArray(JSONTokener x) throws JSONException
+ {
+ return toJSONArray(rowToJSONArray(x), x);
+ }
- /**
- * Produce a JSONArray of JSONObjects from a comma delimited text string
- * using a supplied JSONArray as the source of element names.
- * @param names A JSONArray of strings.
- * @param string The comma delimited text.
- * @return A JSONArray of JSONObjects.
- * @throws JSONException
- */
- public static JSONArray toJSONArray(JSONArray names, String string)
- throws JSONException {
- return toJSONArray(names, new JSONTokener(string));
- }
+ /**
+ * Produce a JSONArray of JSONObjects from a comma delimited text string using
+ * a supplied JSONArray as the source of element names.
+ *
+ * @param names
+ * A JSONArray of strings.
+ * @param string
+ * The comma delimited text.
+ * @return A JSONArray of JSONObjects.
+ * @throws JSONException
+ */
+ public static JSONArray toJSONArray(JSONArray names, String string)
+ throws JSONException
+ {
+ return toJSONArray(names, new JSONTokener(string));
+ }
- /**
- * Produce a JSONArray of JSONObjects from a comma delimited text string
- * using a supplied JSONArray as the source of element names.
- * @param names A JSONArray of strings.
- * @param x A JSONTokener of the source text.
- * @return A JSONArray of JSONObjects.
- * @throws JSONException
- */
- public static JSONArray toJSONArray(JSONArray names, JSONTokener x)
- throws JSONException {
- if (names == null || names.length() == 0) {
- return null;
- }
- JSONArray ja = new JSONArray();
- for (;;) {
- JSONObject jo = rowToJSONObject(names, x);
- if (jo == null) {
- break;
- }
- ja.put(jo);
- }
- if (ja.length() == 0) {
- return null;
- }
- return ja;
+ /**
+ * Produce a JSONArray of JSONObjects from a comma delimited text string using
+ * a supplied JSONArray as the source of element names.
+ *
+ * @param names
+ * A JSONArray of strings.
+ * @param x
+ * A JSONTokener of the source text.
+ * @return A JSONArray of JSONObjects.
+ * @throws JSONException
+ */
+ public static JSONArray toJSONArray(JSONArray names, JSONTokener x)
+ throws JSONException
+ {
+ if (names == null || names.length() == 0)
+ {
+ return null;
}
+ JSONArray ja = new JSONArray();
+ for (;;)
+ {
+ JSONObject jo = rowToJSONObject(names, x);
+ if (jo == null)
+ {
+ break;
+ }
+ ja.put(jo);
+ }
+ if (ja.length() == 0)
+ {
+ return null;
+ }
+ return ja;
+ }
-
- /**
- * Produce a comma delimited text from a JSONArray of JSONObjects. The
- * first row will be a list of names obtained by inspecting the first
- * JSONObject.
- * @param ja A JSONArray of JSONObjects.
- * @return A comma delimited text.
- * @throws JSONException
- */
- public static String toString(JSONArray ja) throws JSONException {
- JSONObject jo = ja.optJSONObject(0);
- if (jo != null) {
- JSONArray names = jo.names();
- if (names != null) {
- return rowToString(names) + toString(names, ja);
- }
- }
- return null;
+ /**
+ * Produce a comma delimited text from a JSONArray of JSONObjects. The first
+ * row will be a list of names obtained by inspecting the first JSONObject.
+ *
+ * @param ja
+ * A JSONArray of JSONObjects.
+ * @return A comma delimited text.
+ * @throws JSONException
+ */
+ public static String toString(JSONArray ja) throws JSONException
+ {
+ JSONObject jo = ja.optJSONObject(0);
+ if (jo != null)
+ {
+ JSONArray names = jo.names();
+ if (names != null)
+ {
+ return rowToString(names) + toString(names, ja);
+ }
}
+ return null;
+ }
- /**
- * Produce a comma delimited text from a JSONArray of JSONObjects using
- * a provided list of names. The list of names is not included in the
- * output.
- * @param names A JSONArray of strings.
- * @param ja A JSONArray of JSONObjects.
- * @return A comma delimited text.
- * @throws JSONException
- */
- public static String toString(JSONArray names, JSONArray ja)
- throws JSONException {
- if (names == null || names.length() == 0) {
- return null;
- }
- StringBuffer sb = new StringBuffer();
- for (int i = 0; i < ja.length(); i += 1) {
- JSONObject jo = ja.optJSONObject(i);
- if (jo != null) {
- sb.append(rowToString(jo.toJSONArray(names)));
- }
- }
- return sb.toString();
+ /**
+ * Produce a comma delimited text from a JSONArray of JSONObjects using a
+ * provided list of names. The list of names is not included in the output.
+ *
+ * @param names
+ * A JSONArray of strings.
+ * @param ja
+ * A JSONArray of JSONObjects.
+ * @return A comma delimited text.
+ * @throws JSONException
+ */
+ public static String toString(JSONArray names, JSONArray ja)
+ throws JSONException
+ {
+ if (names == null || names.length() == 0)
+ {
+ return null;
+ }
+ StringBuffer sb = new StringBuffer();
+ for (int i = 0; i < ja.length(); i += 1)
+ {
+ JSONObject jo = ja.optJSONObject(i);
+ if (jo != null)
+ {
+ sb.append(rowToString(jo.toJSONArray(names)));
+ }
}
+ return sb.toString();
+ }
}
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