使用 Eclipse AST [英] Using the Eclipse AST

问题描述

我最近需要修改一些 Java 代码(添加方法、更改某些字段的签名和删除方法)，我认为所有这些都可以通过使用 Eclipse SDK 的 AST 来完成.

I have recently come into the need of modifying some Java code (adding methods, changing the signatures of some fields and removing methods) and I think that all of this can be accomplished though the use of the Eclipse SDK's AST.

我从一些研究中知道如何解析源文件，但我不知道如何执行上述操作.有谁知道一个好的教程，或者有人可以就如何解决这些问题给我一个简短的解释吗?

I know from some research how to parse in a source file but I don't know how to do the things mentioned above. Does anyone know a good tutorial or could someone give me a brief explanation on how to resolve these issues?

非常感谢，

极限编码器

我现在开始更多地研究 JCodeModel，我认为这可能更容易使用，但我不知道是否可以将现有文档加载到其中?

I have now started to look more into the JCodeModel and I think this could be much easier to use but I do not know if an exististing document can be loaded into it?

如果这行得通，请告诉我；)

If this could work let me know ;)

再次感谢.

推荐答案

我不会在这里发布这个问题的整个源代码，因为它很长，但我会让人们开始.

I will not post the whole source code to this problem here because it is quite long but I will get people started.

您需要的所有文档都在这里:http://publib.boulder.ibm.com/infocenter/iadthelp/v6r0/index.jsp?topic=/org.eclipse.jdt.doc.isv/reference/api/org/eclipse/jdt/core/dom/package-summary.html

All the docs that you will need are here: http://publib.boulder.ibm.com/infocenter/iadthelp/v6r0/index.jsp?topic=/org.eclipse.jdt.doc.isv/reference/api/org/eclipse/jdt/core/dom/package-summary.html

Document document = new Document("import java.util.List;

class X
{

	public void deleteme()
	{
	}

}
");
ASTParser parser = ASTParser.newParser(AST.JLS3);
parser.setSource(document.get().toCharArray());
CompilationUnit cu = (CompilationUnit)parser.createAST(null);
cu.recordModifications();

这将根据您传入的源代码为您创建一个编译单元.

That will create a compilation unit for you from the source code that you pass in.

现在这是一个简单的函数，它打印出您传递的类定义中的所有方法:

Now this is a simple function that prints out all of the methods inside the class definitions in what you have passed:

List<AbstractTypeDeclaration> types = cu.types();
for(AbstractTypeDeclaration type : types) {
    if(type.getNodeType() == ASTNode.TYPE_DECLARATION) {
        // Class def found
        List<BodyDeclaration> bodies = type.bodyDeclarations();
        for(BodyDeclaration body : bodies) {
            if(body.getNodeType() == ASTNode.METHOD_DECLARATION) {
                MethodDeclaration method = (MethodDeclaration)body;
                System.out.println("method declaration: ");
                System.out.println("name: " + method.getName().getFullyQualifiedName());
                System.out.println("modifiers: " + method.getModifiers());
                System.out.println("return type: " + method.getReturnType2().toString());
            }
        }
    }
}

这应该会让你开始.

这确实需要一些时间来适应(在我的情况下需要很多时间).但它确实有效，而且是我能掌握的最佳方法.

It does take some time to get used to this (a lot in my case). But it does work and is the best method I could get my hands on.

祝你好运;)

极限编码器

在我忘记之前，这些是我用来让它工作的导入(我花了很多时间来组织这些):

Before I forget, these are the imports that I used to get this working (I took quite a bit of time to get these organized):

org.eclipse.jdt.core_xxxx.jar
org.eclipse.core.resources_xxxx.jar
org.eclipse.core.jobs_xxxx.jar
org.eclipse.core.runtime_xxxx.jar
org.eclipse.core.contenttype_xxxx.jar
org.eclipse.equinox.common_xxxx.jar
org.eclipse.equinox.preferences_xxxx.jar
org.eclipse.osgi_xxxx.jar
org.eclipse.text_xxxx.jar

其中 xxxx 代表版本号.

Where xxxx represents a version number.

这篇关于使用 Eclipse AST的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！