我想用Java AST編輯幾個Java類。但是我的更改不會顯示在Java類文件中。Eclipse AST在更改時不改變類文件TypeDeclaration
我想要做什麼?我想採取IPackageFragment
並訪問所有ICompilationUnit
s。對於每個聲明的類,我想將超類設置爲特定的類(使用超類的限定名稱because it is an Xtend class)。我也嘗試通過Document
課程進行編輯。
例如:類main.model.someClass
應該wrappers.main.model.someClassWrapper
繼承我是相對較新的JDT API,所以我找不到爲什麼類文件不改變的原因。我已經檢查過this post,但它沒有幫助我。我試圖儘可能接近來自How To Train the JDT Dragon的其他提示/示例,我從Stackoverflow獲得了這些示例。但它不會工作。
這是我要做的事:
private void editTypesIn(IPackageFragment myPackage) throws JavaModelException {
for (ICompilationUnit unit : myPackage.getCompilationUnits()) {
TypeVisitor visitor = new TypeVisitor(myPackage.getElementName(), unit);
unit.becomeWorkingCopy(new NullProgressMonitor());
CompilationUnit parse = parse(unit);
parse.recordModifications();
parse.accept(visitor);
}
}
private static CompilationUnit parse(ICompilationUnit unit) {
ASTParser parser = ASTParser.newParser(AST.JLS8);
parser.setKind(ASTParser.K_COMPILATION_UNIT);
parser.setSource(unit);
parser.setResolveBindings(true);
return (CompilationUnit) parser.createAST(null); // parse
}
這是訪問者類:
public class TypeVisitor extends ASTVisitor {
private final String currentPackage;
private final ICompilationUnit compilationUnit;
public TypeVisitor(String currentPackage, ICompilationUnit compilationUnit) {
this.currentPackage = currentPackage;
this.compilationUnit = compilationUnit;
}
@Override
public boolean visit(TypeDeclaration node) {
if (!node.isInterface()) { // is class
setSuperClass(node, "wrappers." + currentPackage + "." + node.getName().toString() + "Wrapper");
}
return super.visit(node);
}
public void setSuperClass(TypeDeclaration declaration, String qualifiedName) {
try {
// create ast and rewrite:
AST ast = declaration.getAST();
ASTRewrite astRewrite = ASTRewrite.create(ast);
// set super:
Name name = ast.newName(qualifiedName);
Type type = ast.newSimpleType(name);
declaration.setSuperclassType(type);
// apply changes
TextEdit edits = astRewrite.rewriteAST();
compilationUnit.applyTextEdit(edits, new NullProgressMonitor());
compilationUnit.commitWorkingCopy(true, new NullProgressMonitor());
} catch (JavaModelException exception) {
exception.printStackTrace();
} catch (IllegalArgumentException exception) {
exception.printStackTrace();
} catch (MalformedTreeException exception) {
exception.printStackTrace();
}
}
}
在此先感謝您的幫助!
感謝您的幫助,我現在就開始工作! – ConveniencePatterns