Question

我正在尝试运行基本示例，为我的嵌入式groovy表达式设置基类。测试取自http://groovy.codehaus.org/Embedding+Groovy

class ScriptBaseTest {

  @Test
  void extend_groovy_script() {
    def compiler = new CompilerConfiguration()
    compiler.setScriptBaseClass("ScriptBaseTestScript")

    def shell = new GroovyShell(this.class.classLoader, new Binding(), compiler)

    assertEquals shell.evaluate("foo()"), "this is foo"
  }
}

abstract class ScriptBaseTestScript extends Script {
  def foo() {
    "this is foo"
  }
}

如果我将它作为JUnit测试运行（在Eclipse中），我会得到以下stacktrace：

groovy.lang.MissingMethodException: No signature of method: Script1.foo() is applicable for argument types: () values: []
Possible solutions: run(), run(), find(), any(), use([Ljava.lang.Object;), find(groovy.lang.Closure)
    at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:55)
    at org.codehaus.groovy.runtime.callsite.PogoMetaClassSite.callCurrent(PogoMetaClassSite.java:78)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:49)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:137)
    at Script1.run(Script1.groovy:1)
    at groovy.lang.GroovyShell.evaluate(GroovyShell.java:518)
    at groovy.lang.GroovyShell.evaluate(GroovyShell.java:556)
    at groovy.lang.GroovyShell.evaluate(GroovyShell.java:527)
    at groovy.lang.GroovyShell$evaluate.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
    at ScriptBaseTest.extend_groovy_script(ScriptBaseTest.groovy:13)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

所以这看起来有些不对劲;）有什么提示让它运作？

我在Eclipse Juno，Java 1.7中使用Groovy Eclipse插件2.7.2.xx-RELEASE-20121219-0800-e42运行它。 Groovy编译器设置为2.0.6。

更新：当我在命令行上运行它时工作正常。

Answer 1

当我尝试使用GroovyScriptEngine时，我遇到了同样的问题。初始化

    CompilerConfiguration compilerConfiguration = new CompilerConfiguration();
    compilerConfiguration.setScriptBaseClass(DSLScriptBase.class.getName());

    GroovyScriptEngine gse = new GroovyScriptEngine(roots, compilerConfiguration);

没用。未使用自定义脚本基类。

我更改了代码以使用编译器配置创建GroovyClassLoader并使用此类加载器作为父类加载器。这似乎有效。

    CompilerConfiguration compilerConfiguration = new CompilerConfiguration();
    compilerConfiguration.setScriptBaseClass(DSLScriptBase.class.getName());
    GroovyClassLoader scriptClassLoader = new GroovyClassLoader(DSLEngine.class.getClassLoader(), compilerConfiguration);

    GroovyScriptEngine gse = new GroovyScriptEngine(roots, scriptClassLoader);

有人（也许是你？）将它发布到http://groovy-eclipse-plugin.42567.n3.nabble.com/setScriptBaseClass-not-working-inside-eclipse-td4025243.html

的eclipse groovy插件邮件列表中

Answer 2

setScriptBaseClass()需要完全限定名称（即java.lang.String而非String）。

为了让您的生活更轻松，请使用以下代码：

compiler.setScriptBaseClass(ScriptBaseTestScript.class.getName());

此外，基类不能是abstract。

嵌入groovy：CompilerConfiguration.setScriptBaseClass不起作用

2 个答案: