Merge pull request qiujiayu#77 from realoldroot/master

update jdk11弃用Nashorn JavaScript引擎

Author: qiujiayu

src/main/java/com/jarvis/cache/script/JavaScriptParser.java

@@ -1,94 +1,78 @@
-package com.jarvis.cache.script;
-
-import com.jarvis.cache.CacheUtil;
-import lombok.extern.slf4j.Slf4j;
-
-import javax.script.Bindings;
-import javax.script.Compilable;
-import javax.script.CompiledScript;
-import javax.script.ScriptEngine;
-import javax.script.ScriptEngineManager;
-import javax.script.SimpleBindings;
-import java.lang.reflect.Method;
-import java.util.concurrent.ConcurrentHashMap;
-
-/**
- * 解析JavaScript表达式
- *
- * @author jiayu.qiu
- */
-@Slf4j
-public class JavaScriptParser extends AbstractScriptParser {
-
-    private final ScriptEngineManager manager = new ScriptEngineManager();
-
-    private final ConcurrentHashMap<String, CompiledScript> expCache = new ConcurrentHashMap<String, CompiledScript>();
-
-    private final StringBuffer funcs = new StringBuffer();
-
-    private static int versionCode;
-
-    /**
-     * 如果使用的是JDK大于1.8版本的，则用 nashorn，否则用javascript
-     */
-    private final ScriptEngine engine;
-
-    static {
-        String javaVersion = System.getProperty("java.version");
-        int ind = 0;
-        int cnt = 2;
-        for (int i = 0; i < cnt; i++) {
-            ind = javaVersion.indexOf(".", ind);
-            ind++;
-        }
-        javaVersion = javaVersion.substring(0, ind);
-        javaVersion = javaVersion.replaceAll("\\.", "");
-        versionCode = Integer.parseInt(javaVersion);
-    }
-
-    public JavaScriptParser() {
-        engine = manager.getEngineByName(versionCode >= 18 ? "nashorn" : "javascript");
-        try {
-            addFunction(HASH, CacheUtil.class.getDeclaredMethod("getUniqueHashStr", new Class[]{Object.class}));
-            addFunction(EMPTY, CacheUtil.class.getDeclaredMethod("isEmpty", new Class[]{Object.class}));
-        } catch (Exception e) {
-            log.error(e.getMessage(), e);
-        }
-    }
-
-    @Override
-    public void addFunction(String name, Method method) {
-        try {
-            String clsName = method.getDeclaringClass().getName();
-            String methodName = method.getName();
-            funcs.append("function " + name + "(obj){return " + clsName + "." + methodName + "(obj);}");
-        } catch (Exception e) {
-            log.error(e.getMessage(), e);
-        }
-    }
-
-    @SuppressWarnings("unchecked")
-    @Override
-    public <T> T getElValue(String exp, Object target, Object[] arguments, Object retVal, boolean hasRetVal,
-                            Class<T> valueType) throws Exception {
-        Bindings bindings = new SimpleBindings();
-        bindings.put(TARGET, target);
-        bindings.put(ARGS, arguments);
-        if (hasRetVal) {
-            bindings.put(RET_VAL, retVal);
-        }
-        CompiledScript script = expCache.get(exp);
-        if (null != script) {
-            return (T) script.eval(bindings);
-        }
-        if (engine instanceof Compilable) {
-            Compilable compEngine = (Compilable) engine;
-            script = compEngine.compile(funcs + exp);
-            expCache.put(exp, script);
-            return (T) script.eval(bindings);
-        } else {
-            return (T) engine.eval(funcs + exp, bindings);
-        }
-    }
-
-}
+package com.jarvis.cache.script;
+
+import com.jarvis.cache.CacheUtil;
+import lombok.extern.slf4j.Slf4j;
+
+import javax.script.Bindings;
+import javax.script.Compilable;
+import javax.script.CompiledScript;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineManager;
+import javax.script.SimpleBindings;
+import java.lang.reflect.Method;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * 解析JavaScript表达式
+ *
+ * @author jiayu.qiu
+ */
+@Slf4j
+public class JavaScriptParser extends AbstractScriptParser {
+
+    private final ScriptEngineManager manager = new ScriptEngineManager();
+
+    private final ConcurrentHashMap<String, CompiledScript> expCache = new ConcurrentHashMap<String, CompiledScript>();
+
+    private final StringBuffer funcs = new StringBuffer();
+
+    private static int versionCode;
+
+    private final ScriptEngine engine;
+
+    public JavaScriptParser() {
+        engine = manager.getEngineByName("javascript");
+        try {
+            addFunction(HASH, CacheUtil.class.getDeclaredMethod("getUniqueHashStr", new Class[]{Object.class}));
+            addFunction(EMPTY, CacheUtil.class.getDeclaredMethod("isEmpty", new Class[]{Object.class}));
+        } catch (Exception e) {
+            log.error(e.getMessage(), e);
+        }
+    }
+
+    @Override
+    public void addFunction(String name, Method method) {
+        try {
+            String clsName = method.getDeclaringClass().getName();
+            String methodName = method.getName();
+            funcs.append("function " + name + "(obj){return " + clsName + "." + methodName + "(obj);}");
+        } catch (Exception e) {
+            log.error(e.getMessage(), e);
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    @Override
+    public <T> T getElValue(String exp, Object target, Object[] arguments, Object retVal, boolean hasRetVal,
+                            Class<T> valueType) throws Exception {
+        Bindings bindings = new SimpleBindings();
+        bindings.put(TARGET, target);
+        bindings.put(ARGS, arguments);
+        if (hasRetVal) {
+            bindings.put(RET_VAL, retVal);
+        }
+        CompiledScript script = expCache.get(exp);
+        if (null != script) {
+            return (T) script.eval(bindings);
+        }
+        if (engine instanceof Compilable) {
+            Compilable compEngine = (Compilable) engine;
+            script = compEngine.compile(funcs + exp);
+            expCache.put(exp, script);
+            return (T) script.eval(bindings);
+        } else {
+            return (T) engine.eval(funcs + exp, bindings);
+        }
+    }
+
+}