Merge "Match upstream file structure"

am: 5d9cc8c989

Change-Id: I3b544565dfe8750cda1b1b10c2231dda02f54470

1 files changed, 55 insertions, 0 deletions

diff --git a/hamcrest-core/src/main/java/org/hamcrest/core/IsNull.java b/hamcrest-core/src/main/java/org/hamcrest/core/IsNull.java
new file mode 100644
index 0000000..737dcf2
--- /dev/null
+++ b/hamcrest-core/src/main/java/org/hamcrest/core/IsNull.java
@@ -0,0 +1,55 @@
+/*  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();
+    }
+}
+