Could you provide an example of accessing the Eclipse Abstract Syntax Tree programmatically for a given piece of code?
您能否提供一个以编程方式为给定代码段访问Eclipse Abstract Syntax Tree的示例?
eg getting the AST for:
例如,获取AST:
Class1.java
package parseable;
public class Class1 {
/**
* @param args
*/
public static void main(String[] args) {
System.out.println("Hello world!");
}
}
2 个解决方案
#1
3
It is not an exact answer, that may give you a place where to start:
这不是一个确切的答案,可能会给你一个开始的地方:
As said in this question,
正如这个问题所说,
A full example is available in this eclipse corner article, also more details in the eclipse help. And in the slide 59 of this presentation, you see how to apply a change to your source code.
这个eclipse角文章中提供了一个完整的例子,还有eclipse帮助中的更多细节。在本演示文稿的幻灯片59中,您将了解如何对源代码应用更改。
#2
1
// get an ICompilationUnit by some means
// you might drill down from an IJavaProject, for instance
ICompilationUnit iunit = ...
// create a new parser for the latest Java Language Spec
ASTParser parser = ASTParser.newParser(AST.JLS3);
// tell the parser you are going to pass it some code where the type level is a source file
// you might also just want to parse a block, or a method ("class body declaration"), etc
parser.setKind(ASTParser.K_COMPILATION_UNIT);
// set the source to be parsed to the ICompilationUnit
// we could also use a character array
parser.setSource(iunit);
// parse it.
// the output will be a CompilationUnit (also an ASTNode)
// the null is because we're not using a progress monitor
CompilationUnit unit = (CompilationUnit) parser.createAST(null);
Don't be confused by the ICompilationUnit vs CompilationUnit distinction, which seems to be just the result of uncreative naming on their part. CompilationUnit is a type of ASTNode. ICompilationUnit in this context resembles a file handle. For more info on the distinction, see here: http://wiki.eclipse.org/FAQ_How_do_I_manipulate_Java_code%3F
不要被ICompilationUnit与CompilationUnit区分混淆,这似乎只是他们自己命名的命名的结果。 CompilationUnit是一种ASTNode。此上下文中的ICompilationUnit类似于文件句柄。有关区别的更多信息,请参见此处:http://wiki.eclipse.org/FAQ_How_do_I_manipulate_Java_code%3F
#1
3
It is not an exact answer, that may give you a place where to start:
这不是一个确切的答案,可能会给你一个开始的地方:
As said in this question,
正如这个问题所说,
A full example is available in this eclipse corner article, also more details in the eclipse help. And in the slide 59 of this presentation, you see how to apply a change to your source code.
这个eclipse角文章中提供了一个完整的例子,还有eclipse帮助中的更多细节。在本演示文稿的幻灯片59中,您将了解如何对源代码应用更改。
#2
1
// get an ICompilationUnit by some means
// you might drill down from an IJavaProject, for instance
ICompilationUnit iunit = ...
// create a new parser for the latest Java Language Spec
ASTParser parser = ASTParser.newParser(AST.JLS3);
// tell the parser you are going to pass it some code where the type level is a source file
// you might also just want to parse a block, or a method ("class body declaration"), etc
parser.setKind(ASTParser.K_COMPILATION_UNIT);
// set the source to be parsed to the ICompilationUnit
// we could also use a character array
parser.setSource(iunit);
// parse it.
// the output will be a CompilationUnit (also an ASTNode)
// the null is because we're not using a progress monitor
CompilationUnit unit = (CompilationUnit) parser.createAST(null);
Don't be confused by the ICompilationUnit vs CompilationUnit distinction, which seems to be just the result of uncreative naming on their part. CompilationUnit is a type of ASTNode. ICompilationUnit in this context resembles a file handle. For more info on the distinction, see here: http://wiki.eclipse.org/FAQ_How_do_I_manipulate_Java_code%3F
不要被ICompilationUnit与CompilationUnit区分混淆,这似乎只是他们自己命名的命名的结果。 CompilationUnit是一种ASTNode。此上下文中的ICompilationUnit类似于文件句柄。有关区别的更多信息,请参见此处:http://wiki.eclipse.org/FAQ_How_do_I_manipulate_Java_code%3F