pojo config source #4

src/main/java/com/metaframe/unicorn/support/PojoConfigSource.java

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2013 Unicorn Team.
+ *
+ * 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 com.metaframe.unicorn.support;
+
+/**
+ * Pojo配置数据来源。
+ * <p/>
+ *
+ * @author Jerry Lee(oldratlee AT gmail DOT com)
+ */
+public class PojoConfigSource extends AbstractConfigSource {
+    @Override
+    public boolean contains(String key) {
+        return System.getProperties().contains(key);
+    }
+
+    public String get(String key) {
+        return System.getProperty(key);
+    }
+}