ASTParser方法声明类型参数

Question

如何获取使用ASTParser的方法声明的typeParameters。 同样如何获取methodInvocations的typeArguments。

为如：

public void abc(String a[], String b[]) 
{ .. } 

我想提取 “[String[], String[]]”。

谢谢。

Answer 1

你可以这样做：

import java.util.ArrayList; 
import java.util.List; 

import org.eclipse.jdt.core.dom.AST; 
import org.eclipse.jdt.core.dom.ASTParser; 
import org.eclipse.jdt.core.dom.ASTVisitor; 
import org.eclipse.jdt.core.dom.CompilationUnit; 
import org.eclipse.jdt.core.dom.MethodDeclaration; 
import org.eclipse.jdt.core.dom.SingleVariableDeclaration; 
import org.eclipse.jdt.core.dom.VariableDeclaration; 

public class Test { 
    public static void main(final String args[]) { 
     ASTParser parser = ASTParser.newParser(AST.JLS3); 
     parser.setSource("public class A { int i = 9; \n int j; \n ArrayList<Integer> al = new ArrayList<Integer>();j=1000; public void test(String arg1[], String arg2[]) {}}" 
       .toCharArray()); 

     parser.setKind(ASTParser.K_COMPILATION_UNIT); 

     final CompilationUnit cu = (CompilationUnit) parser.createAST(null); 

     cu.accept(new ASTVisitor() { 

      @Override 
      public boolean visit(final MethodDeclaration node) { 
       System.out.println("declaring method '" + node.getName() + "' that returns " + node.getReturnType2()); 
       List<String> parameters = new ArrayList<String>(); 
       for (Object parameter : node.parameters()) { 
        VariableDeclaration variableDeclaration = (VariableDeclaration) parameter; 
        String type = variableDeclaration.getStructuralProperty(SingleVariableDeclaration.TYPE_PROPERTY) 
          .toString(); 
        for (int i = 0; i < variableDeclaration.getExtraDimensions(); i++) { 
         type += "[]"; 
        } 
        parameters.add(type); 
       } 

       System.out.println(parameters); 

       return true; 
      } 

     }); 
    } 
}