/*
* Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package com.sun.tools.jdeprscan;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
/**
* Utility class for manipulating comma-separated-value (CSV) data.
*/
public class CSV {
static String quote(String input) {
String result;
boolean needQuote = input.contains(",");
if (input.contains("\"")) {
needQuote = true;
result = input.replace("\"", "\"\"");
} else {
result = input;
}
if (needQuote) {
return "\"" + result + "\"";
} else {
return result;
}
}
/**
* Writes the objects' string representations to the output as a line of CSV.
* The objects are converted to String, quoted if necessary, joined with commas,
* and are written to the output followed by the line separator string.
*
* @param out the output destination
* @param objs the objects to write
*/
public static void write(PrintStream out, Object... objs) {
out.println(Arrays.stream(objs)
.map(Object::toString)
.map(CSV::quote)
.collect(Collectors.joining(",")));
}
/**
* The CSV parser state.
*/
enum State {
START_FIELD, // the start of a field
IN_FIELD, // within an unquoted field
IN_QFIELD, // within a quoted field
END_QFIELD // after the end of a quoted field
}
/**
* Splits an input line into a list of strings, handling quoting.
*
* @param input the input line
* @return the resulting list of strings
*/
public static List<String> split(String input) {
List<String> result = new ArrayList<>();
StringBuilder cur = new StringBuilder();
State state = State.START_FIELD;
for (int i = 0; i < input.length(); i++) {
char ch = input.charAt(i);
switch (ch) {
case ',':
switch (state) {
case IN_QFIELD:
cur.append(',');
break;
default:
result.add(cur.toString());
cur.setLength(0);
state = State.START_FIELD;
break;
}
break;
case '"':
switch (state) {
case START_FIELD:
state = State.IN_QFIELD;
break;
case IN_QFIELD:
state = State.END_QFIELD;
break;
case IN_FIELD:
throw new CSVParseException("unexpected quote", input, i);
case END_QFIELD:
cur.append('"');
state = State.IN_QFIELD;
break;
}
break;
default:
switch (state) {
case START_FIELD:
state = State.IN_FIELD;
break;
case IN_FIELD:
case IN_QFIELD:
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