59 lines
1.4 KiB
Java
59 lines
1.4 KiB
Java
package main;
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import java.io.*;
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import error.*;
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import interpreter.*;
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public class LispMain {
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private LispMain() {}
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public static void main(String[] args) {
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LispInterpreter interpreter = null;
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ErrorManager errorManager = new ErrorManager(new TerminateInterpreter(), System.err::print);
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if (args.length > 0) {
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String fileName = args[0];
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try {
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interpreter = new LispInterpreter(new FileInputStream(fileName), errorManager, System.out);
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} catch (FileNotFoundException e) {
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errorManager.generateError(new LispFileNotFoundException(e));
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}
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} else
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interpreter = new InteractiveLispInterpreter(System.in, errorManager, System.out);
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interpreter.interpret();
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}
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private static class TerminateInterpreter implements Runnable {
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@Override
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public void run() {
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System.exit(1);
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}
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}
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public static class LispFileNotFoundException extends LispException {
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private static final long serialVersionUID = 1L;
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private String message;
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public LispFileNotFoundException(FileNotFoundException e) {
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this.message = e.getMessage();
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}
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@Override
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public int getSeverity() {
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return ErrorManager.CRITICAL_LEVEL;
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}
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@Override
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public String getMessage() {
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return message;
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}
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}
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}
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