Eclipse AST不会更改在eclipse中未打开的文件 [英] Eclipse AST not changing files which are not opened in eclipse

问题描述

我正在使用eclipse插件，JDT和AST（抽象语法树）来修改源代码。我可以读取所有Java文件，并对所有这些文件进行操作，但是当我使用

$ pre class =lang-java prettyprint-覆盖> TextEdit edits = rewriter.rewriteAST（）;
//将文本编辑应用于编译单元
edits.apply（document）;
iCompilationUnit.getBuffer（）。setContents（document.get（））;


它只会在未保存模式的eclipse中对文件进行更改。

在下面找到我的代码片段：

  CompilationUnit cu = parse（iCompilationUnit）; 
 MethodVisitor visitor = new MethodVisitor（）; 
 cu.accept（访客）; 
 String source = iCompilationUnit.getSource（）; 
 Document document = new Document（source）; 
 ASTRewrite rewriter = ASTRewrite.create（cu.getAST（））; 
 cu.recordModifications（）; 
 for（MethodDeclaration methodDeclaration：visitor.getMethods（））{
 System.out.print（Method name：+ methodDeclaration.getName（）
 +返回类型：+ methodDeclaration。 getReturnType2（））; 
 MethodDeclaration methodDecl = methodDeclaration; 
块块= methodDecl.getBody（）; 
 ListRewrite listRewrite = rewriter.getListRewrite（block，Block.STATEMENTS_PROPERTY）; 
语句placeHolder =（Statement）rewriter.createStringPlaceholder（System.out.println（\Test Print\）;，ASTNode.EMPTY_STATEMENT）; 
 listRewrite.insertFirst（placeHolder，null）; 
} 
 TextEdit edits = rewriter.rewriteAST（）; 
 //将文本编辑应用于编译单元
 edits.apply（document）; 
 iCompilationUnit.getBuffer（）。setContents（document.get（））; 
  

解决方案

尝试：

1. 将TextEdit直接应用于ICompilationUnit，而不是使用Document。


2. 使用ICompilationUnit.commitWorkingCopy保存更改

我使用的代码类似于：

  iCompilationUnit.becomeWorkingCopy（new NullProgressMonitor（））; 
 CompilationUnit cu = parse（iCompilationUnit）; 
 ASTRewrite rewriter = ASTRewrite.create（cu.getAST（））; 
 
 ...进程AST ... 
 
 iCompilationUnit.applyTextEdit（rewrite.rewriteAST（），new NullProgressMonitor（））; 
 iCompilationUnit.commitWorkingCopy（false，new NullProgressMonitor（））; 
  

I am trying to modify source code using eclipse plugin, JDT and AST (Abstract Syntax Tree). I can read all Java files and make operation on all those file, But when i am saving those changes (Edits) in to files using

    TextEdit edits = rewriter.rewriteAST();
    // apply the text edits to the compilation unit
    edits.apply(document);
    iCompilationUnit.getBuffer().setContents(document.get());

It only make changes in file those are open in eclipse in unsaved mode. Rest of files are not affected.

Find my code snippet below:

CompilationUnit cu = parse(iCompilationUnit);
    MethodVisitor visitor = new MethodVisitor();
    cu.accept(visitor);
    String source = iCompilationUnit.getSource();
    Document document= new Document(source);
    ASTRewrite rewriter = ASTRewrite.create(cu.getAST());
    cu.recordModifications();
    for (MethodDeclaration methodDeclaration : visitor.getMethods()) {
        System.out.print("Method name: " + methodDeclaration.getName()
                + " Return type: " + methodDeclaration.getReturnType2());
        MethodDeclaration methodDecl = methodDeclaration;
        Block block = methodDecl.getBody();
        ListRewrite listRewrite = rewriter.getListRewrite(block, Block.STATEMENTS_PROPERTY);
        Statement placeHolder = (Statement) rewriter.createStringPlaceholder("System.out.println(\"Test Print\");", ASTNode.EMPTY_STATEMENT);
        listRewrite.insertFirst(placeHolder, null);
    }
    TextEdit edits = rewriter.rewriteAST();
    // apply the text edits to the compilation unit
    edits.apply(document);
    iCompilationUnit.getBuffer().setContents(document.get());

解决方案

Try to:

1. Apply the TextEdit directly to the ICompilationUnit instead of using Document.
2. Use ICompilationUnit.commitWorkingCopy to save the changes

I use code similar to this:

iCompilationUnit.becomeWorkingCopy(new NullProgressMonitor());
CompilationUnit cu = parse(iCompilationUnit);
ASTRewrite rewriter = ASTRewrite.create(cu.getAST());

... process AST ...

iCompilationUnit.applyTextEdit(rewrite.rewriteAST(), new NullProgressMonitor());
iCompilationUnit.commitWorkingCopy(false, new NullProgressMonitor());   

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