为什么即使我在 ASTParser 上 setResolveBindings(true)，resolveBinding() 也会返回 null？
我正在编写一个 Eclipse 插件，它使用 JDT AST 的 ASTParser 来解析方法。我正在该方法中寻找创建特定类型对象的方法。
当我找到 ClassInstanceCreation 时，我对其调用 getType() 以查看正在实例化的类型。我想确保正在处理的完全解析类型就是我认为的类型，因此我将生成的 Type 对象告诉 resolveBinding()。即使没有编译错误，即使我在 ASTParser 上调用了 setResolveBindings(true)，我还是得到了 null。我为我的 ASTParser（通过 setSource()）提供了包含我的方法的 ICompilationUnit，因此解析器可以访问整个工作区上下文。
final IMethod method = ...;
final ASTParser parser = ASTParser.newParser(AST.JLS3);
parser.setResolveBindings(true);
parser.setSource(method.getCompilationUnit());
parser.setSourceRange(method.getSourceRange().getOffset(), method.getSourceRange().getLength());
parser.setKind(ASTParser.K_CLASS_BODY_DECLARATIONS);
final TypeDeclaration astRoot = (TypeDeclaration) parser.createAST(null);
final ClassInstanceCreation classInstanceCreation = walkAstAndFindMyExpression(astRoot);
final Type instantiatedType = classInstanceCreation.getType();
System.out.println("BINDING: " + instantiatedType.resolveBinding());
为什么resolveBinding()返回null？如何获取绑定信息？
I am writing an Eclipse plug-in that uses JDT AST's ASTParser to parse a method. I am looking within that method for the creation of a particular type of object.
When I find a ClassInstanceCreation, I call getType() on it to see what type is being instantiated. I want to be sure that the fully-resolved type being dealt with there is the one I think it is, so I tell the resultant Type object to resolveBinding(). I get null back even though there are no compilation errors and even though I called setResolveBindings(true) on my ASTParser. I gave my ASTParser (via setSource()) the ICompilationUnit that contains my method, so the parser has access to the entire workspace context.
final IMethod method = ...;
final ASTParser parser = ASTParser.newParser(AST.JLS3);
parser.setResolveBindings(true);
parser.setSource(method.getCompilationUnit());
parser.setSourceRange(method.getSourceRange().getOffset(), method.getSourceRange().getLength());
parser.setKind(ASTParser.K_CLASS_BODY_DECLARATIONS);
final TypeDeclaration astRoot = (TypeDeclaration) parser.createAST(null);
final ClassInstanceCreation classInstanceCreation = walkAstAndFindMyExpression(astRoot);
final Type instantiatedType = classInstanceCreation.getType();
System.out.println("BINDING: " + instantiatedType.resolveBinding());
Why does resolveBinding() return null? How can I get the binding information?
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隐藏在
ASTParser.setKind()概述的底部，小心地向人们排除resolveBinding()和setResolveBindings()的问题，是声明（来自 在线 Javadoc)
我不明白为什么会出现这种情况，但它似乎非常清楚地指出了需要做什么与众不同！
Tucked away at the bottom of the overview of
ASTParser.setKind(), carefully hidden from people troubleshootingresolveBinding()andsetResolveBindings(), is the statement(from the online Javadoc)
I don't understand offhand why this would be the case, but it does seem to point pretty clearly at what needs to be different!