feat: SerializeExample

src/test/java/com/googlecode/aviator/example/SerializeExample.java

@@ -0,0 +1,59 @@
+package com.googlecode.aviator.example;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotSame;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import com.googlecode.aviator.AviatorEvaluator;
+import com.googlecode.aviator.AviatorEvaluatorInstance;
+import com.googlecode.aviator.Expression;
+import com.googlecode.aviator.Options;
+
+/**
+ * Demo for expression serialization
+ * 
+ * @author dennis
+ *
+ */
+public class SerializeExample {
+
+  public static void main(String[] args) throws Exception {
+    // Enable expression serialization feature
+    AviatorEvaluatorInstance engine = AviatorEvaluator.getInstance();
+    engine.setOption(Options.SERIALIZABLE, true);
+
+    Expression exp = engine.compile("if (a>b) { return a; } else { return b; }");
+
+    // Execute the raw expression
+    Object result = exp.execute(exp.newEnv("a", 42, "b", 99));
+    System.out.println("Raw expression result:" + result);
+
+    // Serialize the expression
+    byte[] bs = null; // the serialized bytes
+    try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
+      // Create the ObjectOutputStream
+      ObjectOutputStream output = engine.newObjectOutputStream(out);
+      // Write the expression object
+      output.writeObject(exp);
+      output.close();
+      // Get the result byte array
+      bs = out.toByteArray();
+    }
+
+    System.out.println("Serialize expression bytes array length: " + bs.length);
+
+    // Deserialize expression from bytes
+    try (ByteArrayInputStream in = new ByteArrayInputStream(bs)) {
+      // Create the ObjectInputStream from ByteArrayInputStream(bs)
+      ObjectInputStream input = engine.newObjectInputStream(in);
+      // Read the expression from ObjectInputStream
+      Expression newExp = (Expression) input.readObject();
+      // Execute the expression
+      result = newExp.execute(newExp.newEnv("a", 42, "b", 99));
+      System.out.println("Deserialized expression result:" + result);
+    }
+  }
+
+}