为什么Rhino Javascript引擎抱怨函数不存在?

时间:2014-01-10 17:54:07

标签: java javascript rhino

请原谅我,因为我是一个涉猎Javascript业务的Java人员:)

我希望能够定义一组集成测试用例,以便于针对Java应用程序编写脚本。我认为Javascript将是一个完美的脚本编写语言。为此,我通过Java的Scripting API使用JDK 7附带的Rhino引擎。这些脚本可以访问已在应用程序中定义的Java类,并且可以重用以定义用于集成测试的用例场景。

在Java应用程序中,我已将javascript引擎本身绑定到脚本jsengine,以便我可以加载javascript文件(Including a JavaScript file during Rhino eval)。

我有两个Javascript文件,定义如下:

Function.js:

function send(msg) {
    send.sendMessage(msg);
}

TestCase.js

jsengine.eval(new java.io.FileReader("Function.js");

sendMsg("Test Message");

我还将以下对象定义并绑定到脚本为“javaobj”:

public class TestConnection {

    ...

    public void send(String message) {
        // Code to send the string message via JMS
    }

}

然而,Rhino引擎抱怨以下异常。由于某种原因,似乎不喜欢调用javaobj的send方法。

javax.script.ScriptException: sun.org.mozilla.javascript.internal.EcmaError: TypeError: Cannot find function send in object 
function sendMsg(msg) {...}. (TestCase.js#3) in TestCase.js at line number 3
    at com.sun.script.javascript.RhinoScriptEngine.eval(RhinoScriptEngine.java:224)
    at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:212)
    at com.foo.test.scenario.JavaScriptEngine.execute(JavaScriptEngine.java:56)
    at com.foo.test.TestSuite.start(TestSuite.java:88)
    at com.foo.test.TestSuite.main(TestSuite.java:41)
Caused by: sun.org.mozilla.javascript.internal.EcmaError: TypeError: Cannot find function send in object 
function sendMsg(msg) {...}. (TestCase.js#3) in TestCase.js at line number 3
    at sun.org.mozilla.javascript.internal.ScriptRuntime.constructError(ScriptRuntime.java:3773)
    at sun.org.mozilla.javascript.internal.ScriptRuntime.constructError(ScriptRuntime.java:3751)
    at sun.org.mozilla.javascript.internal.ScriptRuntime.typeError(ScriptRuntime.java:3779)
    at sun.org.mozilla.javascript.internal.ScriptRuntime.typeError2(ScriptRuntime.java:3798)
    at sun.org.mozilla.javascript.internal.ScriptRuntime.notFunctionError(ScriptRuntime.java:3869)
    at sun.org.mozilla.javascript.internal.ScriptRuntime.getPropFunctionAndThisHelper(ScriptRuntime.java:2345)
    at sun.org.mozilla.javascript.internal.ScriptRuntime.getPropFunctionAndThis(ScriptRuntime.java:2312)
    at sun.org.mozilla.javascript.internal.Interpreter.interpretLoop(Interpreter.java:1524)
    at sun.org.mozilla.javascript.internal.Interpreter.interpret(Interpreter.java:854)
    at sun.org.mozilla.javascript.internal.InterpretedFunction.call(InterpretedFunction.java:164)
    at sun.org.mozilla.javascript.internal.ContextFactory.doTopCall(ContextFactory.java:429)
    at com.sun.script.javascript.RhinoScriptEngine$1.superDoTopCall(RhinoScriptEngine.java:116)
    at com.sun.script.javascript.RhinoScriptEngine$1.doTopCall(RhinoScriptEngine.java:109)
    at sun.org.mozilla.javascript.internal.ScriptRuntime.doTopCall(ScriptRuntime.java:3163)
    at sun.org.mozilla.javascript.internal.InterpretedFunction.exec(InterpretedFunction.java:175)
    at sun.org.mozilla.javascript.internal.Context.evaluateReader(Context.java:1159)
    at com.sun.script.javascript.RhinoScriptEngine.eval(RhinoScriptEngine.java:214)
    ... 4 more

有没有人遇到过Rhino这类问题?

P.S。这个问题似乎有关,但也没有回答(TypeError in Rhino: migration from Java 6 to Java 7

1 个答案:

答案 0 :(得分:0)

看起来我找到了自己的答案。 Javascript函数和绑定的Java对象的名称之间存在名称冲突。两者都具有相同的名称,引擎尝试在Function对象上调用不存在的方法!

傻傻的我......:P