如何给IField创建FieldDeclaration（Eclipe插件）

Question

鉴于我可以访问IField字段（从另一个Java文件解析），我如何创建FieldDeclaration以将其添加到AST？

String varName = field.getElementName(); 
    String typeName = Signature.toString(field.getTypeSignature()); 

    VariableDeclarationFragment fieldFrag = ast.newVariableDeclarationFragment(); 
    fieldFrag.setName(ast.newSimpleName(varName)); 
    FieldDeclaration field = ast.newFieldDeclaration(fieldFrag); 
    Type fieldType = ast.newSimpleType(ast.newSimpleName(typeName)); 
    field.setType(fieldType); 
    field.modifiers().add(ast.newModifier(modifierKeyword)); 

上面

类型的字段类型= ast.newSimpleType（ast.newSimpleName（typeName的））;

仅当typeName不是java关键字时才有效。有另一种方式来简单地创建了所有IField信息一fieldDeclaration（改性剂，类型，变量）

感谢

Answer 1

我发现使用copySubtree方式：

AST ast = targetCompilationUnit.getAST(); 

    FieldDeclaration oldFieldDeclaration = ASTNodeSearchUtil.getFieldDeclarationNode(field, sourceCompilationUnit); 
    Type oldType = oldFieldDeclaration.getType(); 

    Type newType = (Type) ASTNode.copySubtree(ast, oldType); 

然后NEWTYPE可用于将其插入FieldDeclaration

Answer 2

你可以做这样的事情：

VariableDeclarationFragment fragment = ast.newVariableDeclarationFragment(); 
fragment.setName(ast.newSimpleName("log")); 
final FieldDeclaration declaration = ast.newFieldDeclaration(fragment); 
declaration.setType(ast.newSimpleType(ast.newName("Logger"))); 
declaration.modifiers().addAll(ASTNodeFactory.newModifiers(ast, Modifier.PRIVATE | Modifier.STATIC | Modifier.FINAL)); 

如果你想初始化它：

MethodInvocation methodInvocation = ast.newMethodInvocation(); 
methodInvocation.setName(ast.newSimpleName("getLogger")); 
methodInvocation.setExpression(ast.newSimpleName("Logger")); 
TypeLiteral typeLiteral = ast.newTypeLiteral(); 
typeLiteral.setType(ast.newSimpleType(ast.newName(className))); 
methodInvocation.arguments().add(typeLiteral); 
fragment.setInitializer(methodInvocation);