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src/main/java/com/iflytop/uf/UfEventBus.java

@@ -0,0 +1,52 @@
+package com.iflytop.uf;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+public class UfEventBus {
+    // 事件回调
+    public interface EventCallback {
+        void callback( Object ... args );
+    }
+
+    // singleton instance
+    private static final UfEventBus instance = new UfEventBus();
+    // 事件处理回调
+    private final Map<String, List<EventCallback>> callbacks;
+
+    // get instance
+    public static UfEventBus getInstance() {
+        return UfEventBus.instance;
+    }
+
+    // con
+    private UfEventBus() {
+        this.callbacks = new HashMap<String, List<EventCallback>>();
+    }
+
+    // on
+    public void on( String name, EventCallback callback ) {
+        if ( !this.callbacks.containsKey(name) ) {
+            this.callbacks.put(name, new ArrayList<EventCallback>());
+        }
+        this.callbacks.get(name).add(callback);
+    }
+
+    // off
+    public void off( String name, EventCallback callback ) {
+        if ( !this.callbacks.containsKey(name) ) {
+            return ;
+        }
+        this.callbacks.get(name).remove(callback);
+    }
+
+    // emit
+    public void emit( String name, Object ... args ) {
+        if ( !this.callbacks.containsKey(name) ) {
+            return ;
+        }
+        for ( EventCallback callback : this.callbacks.get(name) ) {
+            callback.callback( args );
+        }
+    }
+}