如何在Eclipse之外的项目中使用java Eclipse Abstract Syntax Tree？ （即不是eclipse插件）

How can I use the java Eclipse Abstract Syntax Tree in a project outside Eclipse? (ie not an eclipse plugin)

如何在Eclipse之外的项目中使用java Eclipse Abstract Syntax Tree? (即不是eclipse插件)

All the Eclipse AST examples that I've seen are for eclipse plugins. Is there a way (ie an example) of a project that uses the eclipse AST for a non-eclipse project.

我见过的所有Eclipse AST示例都是针对eclipse插件的。有没有一种方法(即一个例子)项目使用eclipse AST进行非日食项目。

2 个解决方案

#1

Below is the code I used to do this given a Java 1.5 file. I'm very new to this and spent today browsing around, and trying things out to get the code below working.

下面是给定Java 1.5文件时我用来执行此操作的代码。我对此非常陌生,今天花了很多时间浏览,并尝试将代码放在下面。

public void processJavaFile(File file) {
    String source = FileUtils.readFileToString(file);
    Document document = new Document(source);
    ASTParser parser = ASTParser.newParser(AST.JLS3);
    parser.setSource(document.get().toCharArray());
    CompilationUnit unit = (CompilationUnit)parser.createAST(null);
    unit.recordModifications();

    // to get the imports from the file
    List<ImportDeclaration> imports = unit.imports();
    for (ImportDeclaration i : imports) {
        System.out.println(i.getName().getFullyQualifiedName());
    }

    // to create a new import
    AST ast = unit.getAST();
    ImportDeclaration id = ast.newImportDeclaration();
    String classToImport = "path.to.some.class";
    id.setName(ast.newName(classToImport.split("\\.")));
    unit.imports().add(id); // add import declaration at end

    // to save the changed file
    TextEdit edits = unit.rewrite(document, null);
    edits.apply(document);
    FileUtils.writeStringToFile(file, document.get());

    // to iterate through methods
    List<AbstractTypeDeclaration> types = unit.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("name: " + method.getName().getFullyQualifiedName());
                }
            }
        }
    }
}

This requires the following libraries:

这需要以下库:

commons-io-1.4.jar
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

#2

According to this old article, you should be able to call AST parser independently of your application context (eclipse plugin or not).

根据这篇旧文章,你应该能够独立于你的应用程序上下文调用AST解析器(eclipse插件与否)。

ASTParser parser = ASTParser.newParser(AST.JLS2);
parser.setSource("".toCharArray());
CompilationUnit unit = (CompilationUnit) parser.createAST(null); 
unit.recordModifications();
AST ast = unit.getAST(); 

alt text http://www.ibm.com/developerworks/opensource/library/os-ast/astexplorer.gif

替代文字http://www.ibm.com/developerworks/opensource/library/os-ast/astexplorer.gif

---

From this bug entry:

从这个错误条目:

ASTParser in 3.0 can be used in another standalone program to create Eclipse ASTs without actually running Eclipse. As the documentation says:

3.0中的ASTParser可用于另一个独立程序,无需实际运行Eclipse即可创建Eclipse AST。正如文件所说:

  char[] source = ...;
  ASTParser parser = ASTParser.newParser(AST.JLS2);  // handles JLS2 (J2SE 1.4)
  parser.setSource(source);
  CompilationUnit result = (CompilationUnit) parser.createAST(null);

Hence this thread attempts to parse a very short java source:

因此,这个线程试图解析一个非常短的java源:

import org.eclipse.jdt.core.dom.*;
import org.eclipse.jface.text.Document;
import org.eclipse.text.edits.TextEdit;

public class Test{

public static void main(String[] args){
 Test t= new Test();
 t.runtest();
}

 void runtest(){
  Document doc = new Document("import java.util.List;\nclass X {}\n");
  ASTParser parser = ASTParser.newParser(AST.JLS3);
  parser.setResolveBindings(true);
  parser.setSource(doc.get().toCharArray());
  CompilationUnit cu = (CompilationUnit) parser.createAST(null);
  cu.recordModifications();
  AST ast = cu.getAST();
  ImportDeclaration id = ast.newImportDeclaration();
  id.setName(ast.newName(new String[] {"java", "util", "Set"}));
  cu.imports().add(id); // add import declaration at end
  TextEdit edits = cu.rewrite(doc, null);
 }

}