Filter-Chain refactor

src/main/java/com/alibaba/druid/util/DruidPasswordCallback.java

@@ -0,0 +1,39 @@
+package com.alibaba.druid.util;
+
+import java.util.Properties;
+
+import javax.security.auth.callback.PasswordCallback;
+
+public class DruidPasswordCallback extends PasswordCallback {
+
+    private static final long serialVersionUID = 1L;
+
+    private String            url;
+
+    private Properties        properties;
+
+    public DruidPasswordCallback(){
+        this("druidDataSouce password", false);
+    }
+
+    public DruidPasswordCallback(String prompt, boolean echoOn){
+        super(prompt, echoOn);
+    }
+
+    public String getUrl() {
+        return url;
+    }
+
+    public void setUrl(String url) {
+        this.url = url;
+    }
+
+    public Properties getProperties() {
+        return properties;
+    }
+
+    public void setProperties(Properties properties) {
+        this.properties = properties;
+    }
+
+}