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package bjc.utils.funcutils;
import java.util.function.BiFunction;
import bjc.utils.funcdata.FunctionalList;
import bjc.utils.funcdata.IFunctionalList;
final class TokenSplitter
implements BiFunction<String, String, IFunctionalList<String>> {
private String tokenToSplit;
public TokenSplitter(String tok) {
this.tokenToSplit = tok;
}
@Override
public IFunctionalList<String> apply(String operatorName,
String operatorRegex) {
if (operatorName == null) {
throw new NullPointerException(
"Operator name must not be null");
} else if (operatorRegex == null) {
throw new NullPointerException(
"Operator regex must not be null");
}
if (tokenToSplit.contains(operatorName)) {
if (StringUtils.containsOnly(tokenToSplit, operatorRegex)) {
return new FunctionalList<>(tokenToSplit);
}
IFunctionalList<String> splitTokens = new FunctionalList<>(
tokenToSplit.split(operatorRegex));
IFunctionalList<String> result = new FunctionalList<>();
int tokenExpansionSize = splitTokens.getSize();
splitTokens.forEachIndexed((tokenIndex, token) -> {
if (tokenIndex != tokenExpansionSize && tokenIndex != 0) {
result.add(operatorName);
result.add(token);
} else {
result.add(token);
}
});
return result;
}
return new FunctionalList<>(tokenToSplit);
}
}
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