Examples of org.eclipse.jdt.core.dom.AST

org.eclipse.jdt.core.dom.AST
import declaration at end TextEdit edits = cu.rewrite(document, null); UndoEdit undo = edits.apply(document); See also {@link org.eclipse.jdt.core.dom.rewrite.ASTRewrite} foran alternative way to describe and serialize changes to a read-only AST.

Clients may create instances of this class using {@link #newAST(int)}, but this class is not intended to be subclassed.
@see ASTParser @see ASTNode @since 2.0 @noinstantiate This class is not intended to be instantiated by clients.

     * @param name tag name (add comment without tag if <code>null</code>)
     * @param text comment text, <code>null</code> value ignored
     */
    public void addSourceComment(String name, String text) {
        if (text != null) {
            AST ast = m_source.getAST();
            TextElement element = ast.newTextElement();
            element.setText(text);
            TagElement tag = ast.newTagElement();
            tag.setTagName(name);
            tag.fragments().add(element);
            Javadoc javadoc = m_declaration.getJavadoc();
            if (javadoc == null) {
                javadoc = ast.newJavadoc();
                m_declaration.setJavadoc(javadoc);
            }
            javadoc.tags().add(tag);
        }
    }

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        // build the actual class and binding structure
        setDefaultPrefixes(m_validationContext.iterateSchemas());
        buildClassesAndBindings(defs, typeinstmap);
        
        // build the actual classes
        AST ast = AST.newAST(AST.JLS3);
        ArrayList packs = m_packageDirectory.getPackages();
        PackageHolder rootpack = null;
        for (int i = 0; i < packs.size(); i++) {
            PackageHolder pack = ((PackageHolder)packs.get(i));
            if (pack.getClassCount() > 0) {

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      Document recoveredDocument = new Document();
      CompilationUnit unit = getRecoveredAST(document, offset, recoveredDocument);
      initContext(offset, importRw, unit);


      ASTNode node = NodeFinder.perform(unit, offset, 1);
      AST ast = unit.getAST();
      ASTRewrite rewrite = ASTRewrite.create(ast);


      CodeGenerationSettings settings = getCodeGenSettings();


      MethodDeclaration stub = createMockMethodStub(ast, rewrite, settings);

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      Document document = new Document(source);
      ASTParser parser = ASTParser.newParser(AST.JLS3);
      parser.setSource(icunit);
      CompilationUnit cunit = (CompilationUnit) parser.createAST(null);
      cunit.recordModifications();
      AST ast = cunit.getAST();
      TypeDeclaration typeDec = (TypeDeclaration) cunit.types().get(0);
      List list = typeDec.superInterfaceTypes();
      Name name = ast.newName(cName);
      Type interfaceType = ast.newSimpleType(name);
      list.add(interfaceType);
      TextEdit edits = cunit.rewrite(document, icunit.getJavaProject()
          .getOptions(true));
      edits.apply(document);
      String newSource = document.get();

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                className.indexOf("."));
          }


          // Create new CompilationUnit
          try {
            AST ast = AST.newAST(AST.JLS3);
            CompilationUnit unit = ast.newCompilationUnit();
            PackageDeclaration packageDeclaration = ast
                .newPackageDeclaration();
            packageDeclaration.setName(ast.newSimpleName(pkg
                .getElementName()));
            unit.setPackage(packageDeclaration);
            TypeDeclaration type = ast.newTypeDeclaration();
            Javadoc comment = ast.newJavadoc();
            TagElement tag = ast.newTagElement();
            TextElement text = ast.newTextElement();
            text.setText("Generated class for method "
                + methodDec.getName());
            tag.fragments().add(text);
            comment.tags().add(tag);
            type.setJavadoc(comment);
            type.setInterface(false);
            type.modifiers()
                .add(ast.newModifier(Modifier.ModifierKeyword.PUBLIC_KEYWORD));
            type.setName(ast.newSimpleName(className));
            type.bodyDeclarations().add(
                BodyDeclaration.copySubtree(type.getAST(),
                    methodDec));
            unit.types().add(type);

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      TypeDeclaration dropTypeDec = (TypeDeclaration) ASTNode
          .copySubtree(astRoot.getAST(), typeDeclaration);


      // creation of ASTRewrite
      AST ast = astRoot.getAST();
      ASTRewrite rewrite = ASTRewrite.create(ast);


      // description of the change
      for (Object typeObj : astRoot.types()) {
        if (typeObj instanceof TypeDeclaration) {

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            // we only consider potential compilation units
            ICompilationUnit cu = newFrag.getCompilationUnit(resourceName);
            if (Util.isExcluded(cu.getPath(), inclusionPatterns, exclusionPatterns, false/*not a folder*/)) continue;
            this.parser.setSource(cu);
            CompilationUnit astCU = (CompilationUnit) this.parser.createAST(this.progressMonitor);
            AST ast = astCU.getAST();
            ASTRewrite rewrite = ASTRewrite.create(ast);
            updatePackageStatement(astCU, newFragName, rewrite, cu);
            TextEdit edits = rewrite.rewriteAST();
            applyTextEdit(cu, edits);
            cu.save(null, false);

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    } else {
      // ensure cu is consistent (noop if already consistent)
      cu.makeConsistent(this.progressMonitor);
      this.parser.setSource(cu);
      CompilationUnit astCU = (CompilationUnit) this.parser.createAST(this.progressMonitor);
      AST ast = astCU.getAST();
      ASTRewrite rewrite = ASTRewrite.create(ast);
      updateTypeName(cu, astCU, cu.getElementName(), newName, rewrite);
      updatePackageStatement(astCU, destPackageName, rewrite, cu);
      return rewrite.rewriteAST();
    }

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      return rewrite.rewriteAST();
    }
  }
  private void updatePackageStatement(CompilationUnit astCU, String[] pkgName, ASTRewrite rewriter, ICompilationUnit cu) throws JavaModelException {
    boolean defaultPackage = pkgName.length == 0;
    AST ast = astCU.getAST();
    if (defaultPackage) {
      // remove existing package statement
      PackageDeclaration pkg = astCU.getPackage();
      if (pkg != null) {
        int pkgStart;
        Javadoc javadoc = pkg.getJavadoc();
        if (javadoc != null) {
          pkgStart = javadoc.getStartPosition() + javadoc.getLength() + 1;
        } else {
          pkgStart = pkg.getStartPosition();
        }
        int extendedStart = astCU.getExtendedStartPosition(pkg);
        if (pkgStart != extendedStart) {
          // keep the comments associated with package declaration
          // see https://bugs.eclipse.org/bugs/show_bug.cgi?id=247757
          String commentSource = cu.getSource().substring(extendedStart, pkgStart);
          ASTNode comment = rewriter.createStringPlaceholder(commentSource, ASTNode.PACKAGE_DECLARATION);
          rewriter.set(astCU, CompilationUnit.PACKAGE_PROPERTY, comment, null);
        } else {
          rewriter.set(astCU, CompilationUnit.PACKAGE_PROPERTY, null, null);
        }
      }
    } else {
      org.eclipse.jdt.core.dom.PackageDeclaration pkg = astCU.getPackage();
      if (pkg != null) {
        // rename package statement
        Name name = ast.newName(pkgName);
        rewriter.set(pkg, PackageDeclaration.NAME_PROPERTY, name, null);
      } else {
        // create new package statement
        pkg = ast.newPackageDeclaration();
        pkg.setName(ast.newName(pkgName));
        rewriter.set(astCU, CompilationUnit.PACKAGE_PROPERTY, pkg, null);
      }
    }
  }

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     */
    private void updateTypeName(ICompilationUnit cu, CompilationUnit astCU, String oldName, String newName, ASTRewrite rewriter) throws JavaModelException {
      if (newName != null) {
        String oldTypeName= Util.getNameWithoutJavaLikeExtension(oldName);
        String newTypeName= Util.getNameWithoutJavaLikeExtension(newName);
        AST ast = astCU.getAST();
        // update main type name
        IType[] types = cu.getTypes();
        for (int i = 0, max = types.length; i < max; i++) {
          IType currentType = types[i];
          if (currentType.getElementName().equals(oldTypeName)) {
            AbstractTypeDeclaration typeNode = (AbstractTypeDeclaration) ((JavaElement) currentType).findNode(astCU);
            if (typeNode != null) {
              // rename type
              rewriter.replace(typeNode.getName(), ast.newSimpleName(newTypeName), null);
              // rename constructors
              Iterator bodyDeclarations = typeNode.bodyDeclarations().iterator();
              while (bodyDeclarations.hasNext()) {
                Object bodyDeclaration = bodyDeclarations.next();
                if (bodyDeclaration instanceof MethodDeclaration) {
                  MethodDeclaration methodDeclaration = (MethodDeclaration) bodyDeclaration;
                  if (methodDeclaration.isConstructor()) {
                    SimpleName methodName = methodDeclaration.getName();
                    if (methodName.getIdentifier().equals(oldTypeName)) {
                      rewriter.replace(methodName, ast.newSimpleName(newTypeName), null);
                    }
                  }
                }
              }
            }

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