From d0b127b84fc3549093ffbd802c3ccb110ecbbd55 Mon Sep 17 00:00:00 2001
From: huangli <areyouok@gmail.com>
Date: Tue, 30 Jan 2018 18:02:28 +0800
Subject: [PATCH] fix compatible problem in Spring 4.0

---
 .../anno/method/ExpressionEvaluator.java      | 26 ++++++++++++++-----
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/jetcache-anno/src/main/java/com/alicp/jetcache/anno/method/ExpressionEvaluator.java b/jetcache-anno/src/main/java/com/alicp/jetcache/anno/method/ExpressionEvaluator.java
index 1a463f1d6..d0141f3f1 100644
--- a/jetcache-anno/src/main/java/com/alicp/jetcache/anno/method/ExpressionEvaluator.java
+++ b/jetcache-anno/src/main/java/com/alicp/jetcache/anno/method/ExpressionEvaluator.java
@@ -5,18 +5,16 @@
 
 import com.alicp.jetcache.CacheConfigException;
 import com.alicp.jetcache.CacheException;
-import com.alicp.jetcache.anno.CacheConsts;
-import com.alicp.jetcache.anno.support.CacheAnnoConfig;
 import org.mvel2.MVEL;
 import org.springframework.core.DefaultParameterNameDiscoverer;
 import org.springframework.expression.EvaluationContext;
 import org.springframework.expression.Expression;
 import org.springframework.expression.ExpressionParser;
-import org.springframework.expression.spel.SpelCompilerMode;
 import org.springframework.expression.spel.SpelParserConfiguration;
 import org.springframework.expression.spel.standard.SpelExpressionParser;
 import org.springframework.expression.spel.support.StandardEvaluationContext;
 
+import java.lang.reflect.Constructor;
 import java.lang.reflect.Method;
 import java.util.function.Function;
 import java.util.regex.Matcher;
@@ -93,10 +91,24 @@ class SpelEvaluator implements Function<Object, Object> {
 
     private static ExpressionParser parser;
 
-    static{
-        SpelParserConfiguration config = new SpelParserConfiguration(SpelCompilerMode.IMMEDIATE,
-                SpelEvaluator.class.getClassLoader());
-        parser  = new SpelExpressionParser(config);
+    static {
+        try {
+            //since spring 4.1
+            Class modeClass = Class.forName("org.springframework.expression.spel.SpelCompilerMode");
+
+            try {
+                Constructor<SpelParserConfiguration> c = SpelParserConfiguration.class
+                        .getConstructor(modeClass, ClassLoader.class);
+                Object mode = modeClass.getField("IMMEDIATE").get(null);
+                SpelParserConfiguration config = c.newInstance(mode, SpelEvaluator.class.getClassLoader());
+                parser = new SpelExpressionParser(config);
+            } catch (Exception e) {
+                throw new CacheException(e);
+            }
+        } catch (ClassNotFoundException e) {
+            parser = new SpelExpressionParser();
+        }
+
     }
 
     private final Expression expression;