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package bjc.utils.funcutils;
import java.util.function.BiFunction;
import bjc.utils.funcdata.FunctionalList;
import bjc.utils.funcdata.IList;
final class TokenDeaffixer
implements BiFunction<String, String, IList<String>> {
private String token;
public TokenDeaffixer(String tok) {
token = tok;
}
@Override
public IList<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 (StringUtils.containsOnly(token, operatorRegex)) {
return new FunctionalList<>(token);
} else if (token.startsWith(operatorName)) {
if(token.endsWith(operatorName)) {
return new FunctionalList<>(operatorName, token.split(operatorRegex)[1], operatorName);
}
return new FunctionalList<>(operatorName, token.split(operatorRegex)[1]);
} else if (token.endsWith(operatorName)) {
return new FunctionalList<>(token.split(operatorRegex)[0], operatorName);
} else if (token.contains(operatorName)) {
String[] tokenParts = token.split(operatorRegex);
IList<String> returned = new FunctionalList<>();
for(int i = 0; i < tokenParts.length; i++) {
returned.add(tokenParts[i]);
if(i < tokenParts.length - 1) {
returned.add(operatorName);
}
}
return returned;
} else {
return new FunctionalList<>(token);
}
}
}
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