65 lines
1.4 KiB
Java
65 lines
1.4 KiB
Java
package net.abhinavsarkar.nulllessj;
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public final class Just<T> extends Maybe<T> {
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private final T value;
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public Just(final T value) {
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if (value == null) {
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throw new NothingException();
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}
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this.value = value;
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}
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public static <T> Just<T> just(final T value) {
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return new Just<T>(value);
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}
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@Override
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public T get() {
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return value;
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}
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@Override
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public boolean isNothing() {
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return false;
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}
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@Override
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public int hashCode() {
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final int prime = 31;
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int result = 1;
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result = prime * result + ((value == null) ? 0 : value.hashCode());
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return result;
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}
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@SuppressWarnings("unchecked")
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@Override
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public boolean equals(final Object obj) {
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if (this == obj) {
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return true;
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}
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if (obj == null) {
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return false;
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}
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if (getClass() != obj.getClass()) {
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return false;
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}
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Just<T> other = (Just<T>) obj;
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if (value == null) {
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if (other.value != null) {
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return false;
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}
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} else if (!value.equals(other.value)) {
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return false;
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}
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return true;
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}
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@Override
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public String toString() {
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return "Just(" + value.toString() + ")";
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}
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}
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