Question

我创造了转型

package org.global

import groovy.transform.CompileStatic 

import org.codehaus.groovy.ast.ASTNode
import org.codehaus.groovy.ast.ClassNode
import org.codehaus.groovy.ast.ClassHelper
import org.codehaus.groovy.ast.MethodNode
import org.codehaus.groovy.ast.Parameter

import org.codehaus.groovy.control.CompilePhase
import org.codehaus.groovy.control.SourceUnit

import org.codehaus.groovy.transform.ASTTransformation
import org.codehaus.groovy.transform.GroovyASTTransformation

import org.codehaus.groovy.ast.stmt.BlockStatement
import org.codehaus.groovy.ast.stmt.ExpressionStatement
import org.codehaus.groovy.ast.expr.MethodCallExpression
import org.codehaus.groovy.ast.expr.VariableExpression
import org.codehaus.groovy.ast.expr.ConstantExpression
import org.codehaus.groovy.ast.expr.ArgumentListExpression

@CompileStatic
@GroovyASTTransformation(phase = CompilePhase.SEMANTIC_ANALYSIS)
public class SayHelloTransformation implements ASTTransformation {

    public void visit(ASTNode[] astNodes, SourceUnit sourceUnit) {

        BlockStatement statement = new BlockStatement()
        statement.addStatement( 
            new ExpressionStatement (
                new MethodCallExpression (
                    new VariableExpression("this"),
                    new ConstantExpression("println"),
                    new ArgumentListExpression(
                        new ConstantExpression("hello world")
                    )
                )
            )
        )

        MethodNode sayHelloMethod = new MethodNode(
            "sayHello", 0x0001, ClassHelper.VOID_TYPE, Parameter.EMPTY_ARRAY, 
            ClassNode.EMPTY_ARRAY, statement
        )

        sourceUnit.AST.methods.add(sayHelloMethod)
    }
}

我编译了它。然后我添加了带有描述符

的META-INF文件夹

org.global.SayHelloTransformation

所以整体结构看起来像这样

META-INF\
    services\
        org.codehaus.groovy.transform.ASTTransformation
org\
    global\
        SayHelloTransformation.class
SayHelloTransformation.groovy

然后我将SomeClass.groovy添加到与SayHelloTransformation.groovy

相同的文件夹中

class SomeClass {
}

和test.groovy档案

new SomeClass（）。sayHello（）

但我得到了这个例外

Caught: groovy.lang.MissingMethodException: No signature of method: SomeClass.sayHello() is applicable for argument types: (
) values: []
groovy.lang.MissingMethodException: No signature of method: SomeClass.sayHello() is applicable for argument types: () values
: []
    at test.run(test.groovy:2)

整个结构看起来像这样

META-INF\
    services\
        org.codehaus.groovy.transform.ASTTransformation
org\
    global\
        SayHelloTransformation.class
SayHelloTransformation.groovy
SomeClass.class
SomeClass.groovy
test.groovy

创建添加方法的全局转换

0 个答案: