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/* Copyright (c) 2000-2006 hamcrest.org
*/
package org.hamcrest.core;
import static org.hamcrest.core.IsNot.not;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.Factory;
import org.hamcrest.BaseMatcher;
/**
* Is the value null?
*/
public class IsNull<T> extends BaseMatcher<T> {
public boolean matches(Object o) {
return o == null;
}
public void describeTo(Description description) {
description.appendText("null");
}
/**
* Matches if value is null.
*/
@Factory
public static <T> Matcher<T> nullValue() {
return new IsNull<T>();
}
/**
* Matches if value is not null.
*/
@Factory
public static <T> Matcher<T> notNullValue() {
return not(IsNull.<T>nullValue());
}
/**
* Matches if value is null. With type inference.
*/
@Factory
public static <T> Matcher<T> nullValue(@SuppressWarnings("unused") Class<T> type) {
return nullValue();
}
/**
* Matches if value is not null. With type inference.
*/
@Factory
public static <T> Matcher<T> notNullValue(@SuppressWarnings("unused") Class<T> type) {
return notNullValue();
}
}
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