protected void removeClassFile(IPath typePath, IContainer outputFolder) throws CoreException {
   if (typePath.lastSegment().indexOf('$') == -1) { // is not a nested type
     this.newState.removeQualifiedTypeName(typePath.toString());
     // add dependents even when the type thinks it does not exist to be on the safe side
     if (JavaBuilder.DEBUG) System.out.println("Found removed type " + typePath); // $NON-NLS-1$
     addDependentsOf(
         typePath,
         true); // when member types are removed, their enclosing type is structurally changed
   }
   IFile classFile =
       outputFolder.getFile(typePath.addFileExtension(SuffixConstants.EXTENSION_class));
   if (classFile.exists()) {
     if (JavaBuilder.DEBUG)
       System.out.println("Deleting class file of removed type " + typePath); // $NON-NLS-1$
     classFile.delete(IResource.FORCE, null);
   }
 }
  /**
   * Copies/moves a compilation unit with the name <code>newCUName</code> to the destination
   * package.<br>
   * The package statement in the compilation unit is updated if necessary. The main type of the
   * compilation unit is renamed if necessary.
   *
   * @exception JavaModelException if the operation is unable to complete
   */
  private void processCompilationUnitResource(ICompilationUnit source, PackageFragment dest)
      throws JavaModelException {
    String newCUName = getNewNameFor(source);
    String destName = (newCUName != null) ? newCUName : source.getElementName();
    TextEdit edit = updateContent(source, dest, newCUName); // null if unchanged

    // TODO (frederic) remove when bug 67606 will be fixed (bug 67823)
    // store encoding (fix bug 66898)
    IFile sourceResource = (IFile) source.getResource();
    String sourceEncoding = null;
    try {
      sourceEncoding = sourceResource.getCharset(false);
    } catch (CoreException ce) {
      // no problem, use default encoding
    }
    // end todo
    // copy resource
    IContainer destFolder = (IContainer) dest.getResource(); // can be an IFolder or an IProject
    IFile destFile = destFolder.getFile(new Path(destName));
    org.eclipse.jdt.internal.core.CompilationUnit destCU =
        new org.eclipse.jdt.internal.core.CompilationUnit(
            dest, destName, DefaultWorkingCopyOwner.PRIMARY);
    if (!destFile.equals(sourceResource)) {
      try {
        if (!destCU.isWorkingCopy()) {
          if (destFile.exists()) {
            if (this.force) {
              // we can remove it
              deleteResource(destFile, IResource.KEEP_HISTORY);
              destCU.close(); // ensure the in-memory buffer for the dest CU is closed
            } else {
              // abort
              throw new JavaModelException(
                  new JavaModelStatus(
                      IJavaModelStatusConstants.NAME_COLLISION,
                      Messages.bind(
                          Messages.status_nameCollision, destFile.getFullPath().toString())));
            }
          }
          int flags = this.force ? IResource.FORCE : IResource.NONE;
          if (isMove()) {
            flags |= IResource.KEEP_HISTORY;
            sourceResource.move(destFile.getFullPath(), flags, getSubProgressMonitor(1));
          } else {
            if (edit != null) flags |= IResource.KEEP_HISTORY;
            sourceResource.copy(destFile.getFullPath(), flags, getSubProgressMonitor(1));
          }
          setAttribute(HAS_MODIFIED_RESOURCE_ATTR, TRUE);
        } else {
          destCU.getBuffer().setContents(source.getBuffer().getContents());
        }
      } catch (JavaModelException e) {
        throw e;
      } catch (CoreException e) {
        throw new JavaModelException(e);
      }

      // update new resource content
      if (edit != null) {
        boolean wasReadOnly = destFile.isReadOnly();
        try {
          saveContent(dest, destName, edit, sourceEncoding, destFile);
        } catch (CoreException e) {
          if (e instanceof JavaModelException) throw (JavaModelException) e;
          throw new JavaModelException(e);
        } finally {
          Util.setReadOnly(destFile, wasReadOnly);
        }
      }

      // register the correct change deltas
      prepareDeltas(source, destCU, isMove());
      if (newCUName != null) {
        // the main type has been renamed
        String oldName = Util.getNameWithoutJavaLikeExtension(source.getElementName());
        String newName = Util.getNameWithoutJavaLikeExtension(newCUName);
        prepareDeltas(source.getType(oldName), destCU.getType(newName), isMove());
      }
    } else {
      if (!this.force) {
        throw new JavaModelException(
            new JavaModelStatus(
                IJavaModelStatusConstants.NAME_COLLISION,
                Messages.bind(Messages.status_nameCollision, destFile.getFullPath().toString())));
      }
      // update new resource content
      // in case we do a saveas on the same resource we have to simply update the contents
      // see http://dev.eclipse.org/bugs/show_bug.cgi?id=9351
      if (edit != null) {
        saveContent(dest, destName, edit, sourceEncoding, destFile);
      }
    }
  }