UTILS-14: Add clock abstraction.

diff --git a/support/general/src/main/java/org/wamblee/general/Clock.java b/support/general/src/main/java/org/wamblee/general/Clock.java
new file mode 100644 (file)
index 0000000..e5510ed
--- /dev/null
+++ b/support/general/src/main/java/org/wamblee/general/Clock.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2005-2010 the original author or authors.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.wamblee.general;
+
+/**
+ * Clock abstraction for {@link System#currentTimeMillis()}.
+ * 
+ * @author Erik Brakkee
+ */
+public interface Clock {
+
+    /**
+     * @return Current time.
+     */
+    long currentTimeMillis();
+}

diff --git a/support/general/src/main/java/org/wamblee/general/SystemClock.java b/support/general/src/main/java/org/wamblee/general/SystemClock.java
new file mode 100644 (file)
index 0000000..1295258
--- /dev/null
+++ b/support/general/src/main/java/org/wamblee/general/SystemClock.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2005-2010 the original author or authors.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.wamblee.general;
+
+/**
+ * Default clock implementation delegating to the system clock.
+ * 
+ * @author Erik Brakkee
+ */
+public class SystemClock implements Clock {
+
+    @Override
+    public long currentTimeMillis() {
+        return System.currentTimeMillis();
+    }
+
+}