51 lines
1.0 KiB
Java
51 lines
1.0 KiB
Java
package sexpression;
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import java.text.MessageFormat;
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import error.LispException;
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public class LispNumber extends Atom {
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private int value;
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public LispNumber(String text) {
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super(text.replaceFirst("^0+(?!$)", ""));
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try {
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this.value = Integer.parseInt(text);
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} catch (NumberFormatException e) {
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throw new InvalidNumberException(text);
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}
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}
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public LispNumber(int value) {
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super(Integer.toString(value));
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this.value = value;
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}
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public boolean numberp() {
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return true;
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}
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public int getValue() {
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return value;
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}
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public class InvalidNumberException extends LispException {
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private static final long serialVersionUID = 1L;
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private String text;
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public InvalidNumberException(String text) {
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this.text = text;
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}
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@Override
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public String getMessage() {
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return MessageFormat.format("{0} is not a valid integer", text);
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}
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}
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}
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