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package ext.plantuml.com.ctreber.acearth.util;
import java.util.ArrayList;
import java.util.List;
/**
* <p>Cuts a string in words separated by white space. Quotes and square
* brackets are recognized (that is, white space within is ignored).
*
* <p>© 2002 Christian Treber, ct@ctreber.com
* @author Christian Treber, ct@ctreber.com
*
*/
public class StringParser
{
public static List parse(String pLine)
{
final List lSections = new ArrayList();
// True if within word.
boolean lInSectionP = false;
// Current char
char lChar;
// Wait for this character before switching back to normal parsing.
char lSeparator = ' ';
// Part count.
int lSectionNo = 0;
// Part start position
int lSectionStart = 0;
// Part end position
int lSectionEnd = 0;
final int lLen = pLine.length();
for(int lCharNo = 0; lCharNo <= lLen; lCharNo++)
{
if(lCharNo < lLen)
{
lChar = pLine.charAt(lCharNo);
} else
{
// This is a fictional last character.
lChar = ' ';
}
if(lInSectionP)
{
// In section. Termination is by space or specific separator.
if((lChar != ' ') || (lSeparator != ' '))
{
// It's not a space, or it is a space, but we wait for a special separator.
if(lChar == lSeparator)
{
// We waited for this separator. Switch back to normal parsing.
lSeparator = ' ';
lSectionEnd = lCharNo - 1;
} else
{
lSectionEnd = lCharNo;
}
} else
{
// Section has ended (with a space).
lSections.add(pLine.substring(lSectionStart, lSectionEnd + 1));
lSectionNo++;
lInSectionP = false;
}
} else
{
// Not in a section, skipping white space.
if(lChar != ' ')
{
// No white space: a section has started.
if(lChar == '"')
{
// Special parsing "string"
lSeparator = '"';
lSectionStart = lCharNo + 1;
} else if(lChar == '[')
{
// Special parsing "square brackets"
lSeparator = ']';
lSectionStart = lCharNo + 1;
} else
{
// Use normal parsing.
lSeparator = ' ';
lSectionEnd = lSectionStart = lCharNo;
}
lInSectionP = true;
} else
{
// More void...
}
}
}
return lSections;
}
}
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