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package bjc.utils.parserutils.splitter;
import static bjc.utils.PropertyDB.applyFormat;
import java.util.LinkedHashSet;
import java.util.Set;
import java.util.regex.Pattern;
import bjc.utils.funcdata.IList;
/**
* Split a string into pieces around a regular expression, and offer an easy way
* to configure the regular expression.
*
* @author EVE
*
*/
public class ConfigurableTokenSplitter extends SimpleTokenSplitter {
private final Set<String> simpleDelimiters;
private final Set<String> multipleDelimiters;
private final Set<String> rRawDelimiters;
/**
* Create a new token splitter with blank configuration.
*
* @param keepDelims
* Whether or not to keep delimiters.
*/
public ConfigurableTokenSplitter(final boolean keepDelims) {
super(null, keepDelims);
/*
* Use linked hash-sets to keep items in insertion order.
*/
simpleDelimiters = new LinkedHashSet<>();
multipleDelimiters = new LinkedHashSet<>();
rRawDelimiters = new LinkedHashSet<>();
}
/**
* Add a set of simple delimiters to this splitter.
*
* Simple delimiters match one occurrence of themselves as literals.
*
* @param simpleDelims
* The simple delimiters to add.
*/
public void addSimpleDelimiters(final String... simpleDelims) {
for(final String simpleDelim : simpleDelims) {
simpleDelimiters.add(simpleDelim);
}
}
/**
* Add a set of multiple delimiters to this splitter.
*
* Multiple delimiters match one or more occurrences of themselves as
* literals.
*
* @param multiDelims
* The multiple delimiters to add.
*/
public void addMultiDelimiters(final String... multiDelims) {
for(final String multiDelim : multiDelims) {
multipleDelimiters.add(multiDelim);
}
}
/**
* Add a set of raw delimiters to this splitter.
*
* Raw delimiters match one occurrence of themselves as regular
* expressions.
*
* @param rRawDelims
* The raw delimiters to add.
*/
public void addRawDelimiters(final String... rRawDelims) {
for(final String rRawDelim : rRawDelims) {
rRawDelimiters.add(rRawDelim);
}
}
/**
* Take the configuration and compile it into a regular expression to
* use when splitting.
*/
public void compile() {
final StringBuilder rPattern = new StringBuilder();
for(final String rRawDelimiter : rRawDelimiters) {
rPattern.append(applyFormat("rawDelim", rRawDelimiter));
}
for(final String multipleDelimiter : multipleDelimiters) {
rPattern.append(applyFormat("multipleDelim", multipleDelimiter));
}
for(final String simpleDelimiter : simpleDelimiters) {
rPattern.append(applyFormat("simpleDelim", simpleDelimiter));
}
rPattern.deleteCharAt(rPattern.length() - 1);
spliter = Pattern.compile(rPattern.toString());
}
@Override
public IList<String> split(final String input) {
if(spliter == null) throw new IllegalStateException("Must compile splitter before use");
return super.split(input);
}
@Override
public String toString() {
final String fmt = "ConfigurableTokenSplitter [simpleDelimiters=%s, multipleDelimiters=%s,"
+ " rRawDelimiters=%s, spliter=%s]";
return String.format(fmt, simpleDelimiters, multipleDelimiters, rRawDelimiters, spliter);
}
}
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