/*
* Encog(tm) Core v3.3 - Java Version
* http://www.heatonresearch.com/encog/
* https://github.com/encog/encog-java-core
* Copyright 2008-2014 Heaton Research, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* For more information on Heaton Research copyrights, licenses
* and trademarks visit:
* http://www.heatonresearch.com/copyright
*/
package org.encog.util.csv;
import java.util.ArrayList;
import java.util.List;
import org.encog.util.SimpleParser;
public class ParseCSVLine {
private CSVFormat format;
public ParseCSVLine(CSVFormat theFormat)
{
this.format = theFormat;
}
public List<String> parse(final String line) {
if( this.format.getSeparator()==' ') {
return parseSpaceSep(line);
} else {
return parseCharSep(line);
}
}
private List<String> parseSpaceSep(final String line) {
final List<String> result = new ArrayList<String>();
SimpleParser parse = new SimpleParser(line);
while(!parse.eol()) {
if( parse.peek()=='\"') {
result.add( parse.readQuotedString() );
} else {
result.add( parse.readToWhiteSpace() );
}
parse.eatWhiteSpace();
}
return result;
}
/**
* Parse the line into a list of values.
*
* @param line
* The line to parse.
* @return The elements on this line.
*/
private List<String> parseCharSep(final String line) {
final StringBuilder item = new StringBuilder();
final List<String> result = new ArrayList<String>();
boolean quoted = false;
boolean hadQuotes = false;
for (int i = 0; i < line.length(); i++) {
final char ch = line.charAt(i);
if ((ch == this.format.getSeparator()) && !quoted) {
String s = item.toString();
if( !hadQuotes ) {
s = s.trim();
}
result.add(s);
item.setLength(0);
quoted = false;
hadQuotes = false;
} else if ((ch == '\"') && quoted) {
if( (i+1)<line.length() && line.charAt(i+1)=='\"' ) {
i++;
item.append("\"");
} else {
quoted = false;
}
} else if ((ch == '\"') && (item.length() == 0)) {
hadQuotes = true;
quoted = true;
} else {
item.append(ch);
}
}
if (item.length() > 0) {
String s = item.toString();
if( !hadQuotes ) {
s = s.trim();
}
result.add(s);
}
return result;
}
}