80 lines
1.6 KiB
Java
80 lines
1.6 KiB
Java
package serene.simple;
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import serene.simple.SereneException;
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public class SNumber {
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public static interface IOps {
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public IOps add(Object x);
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public IOps add(Double x);
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public IOps add(Long x);
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public Object value();
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}
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public static class LongNumber implements IOps {
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private long v;
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public LongNumber() {
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this.v = 0;
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}
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public LongNumber(long v) {
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this.v = v;
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}
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public IOps add(Object x) throws SereneException {
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if (x instanceof Long) {
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return this.add((long) x);
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}
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else if (x instanceof Double) {
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return this.add((Double) x);
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}
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throw new SereneException("Can't cast anything beside Long and Double");
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}
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public IOps add(Long x) {
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return new LongNumber(this.v + x);
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}
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public IOps add(Double x) {
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DoubleNumber y = new DoubleNumber(x);
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return y.add(this.v);
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}
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public Object value() {
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return this.v;
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}
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}
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public static class DoubleNumber implements IOps {
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private Double v;
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public DoubleNumber(Double v) {
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this.v = v;
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}
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public IOps add(Object x) throws SereneException {
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if (x instanceof Long) {
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return this.add((long) x);
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}
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else if (x instanceof Double) {
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return this.add((Double) x);
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}
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throw new SereneException("Can't cast anything beside Long and Double");
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}
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public IOps add(Double x) {
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return new DoubleNumber(this.v + x);
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}
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public IOps add(Long x) {
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return new DoubleNumber(this.v + x.doubleValue());
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}
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public Object value() {
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return this.v;
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}
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}
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}
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