UncheckedLexerException.java
package net.morimekta.lexer;
import net.morimekta.strings.Displayable;
import java.io.UncheckedIOException;
import static java.util.Objects.requireNonNull;
/**
* Exception representing problems parsing tokens or other problems with
* returned tokens from the {@link Lexer}, or how a token interacts with
* other in the whole structure. This exception is not meant to represent
* problems that solely comes from the interaction between tokens in an
* otherwise sound document, e.g. where the problem can not be pinned
* to a single token causing the problem.
*/
public class UncheckedLexerException extends UncheckedIOException implements Displayable {
/**
* Make exception cause by secondary problems.
*
* @param cause The cause of the exception.
*/
public UncheckedLexerException(LexerException cause) {
super(requireNonNull(cause, "cause == null").getMessage(), cause);
}
@Override
public synchronized LexerException getCause() {
return requireNonNull((LexerException) super.getCause());
}
@Override
public String toString() {
return getCause().getClass().getSimpleName() + ": " + getMessage();
}
@Override
public String displayString() {
return getCause().displayString();
}
}