python/src/com/jetbrains/python/refactoring/classes/pushDown/PyPushDownProcessor.java

/*
 * Copyright 2000-2013 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.jetbrains.python.refactoring.classes.pushDown;

import com.intellij.openapi.project.Project;
import com.intellij.refactoring.RefactoringBundle;
import com.intellij.usageView.UsageViewBundle;
import com.jetbrains.python.psi.PyClass;
import com.jetbrains.python.psi.PyElement;
import com.jetbrains.python.psi.search.PyClassInheritorsSearch;
import com.jetbrains.python.refactoring.classes.membersManager.PyMemberInfo;
import com.jetbrains.python.refactoring.classes.membersManager.PyMembersRefactoringBaseProcessor;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.Collection;

/**
 * @author Dennis.Ushakov
 */
public class PyPushDownProcessor extends PyMembersRefactoringBaseProcessor {

  private static final String HEADER = RefactoringBundle.message("push.down.members.elements.header");

  public PyPushDownProcessor(
    @NotNull final Project project,
    @NotNull final Collection<PyMemberInfo<PyElement>> membersToMove,
    @NotNull final PyClass from) {
    super(project, membersToMove, from, getChildren(from));
  }

  @NotNull
  private static PyClass[] getChildren(@NotNull final PyClass from) {
    final Collection<PyClass> all = getInheritors(from);
    return all.toArray(new PyClass[all.size()]);
  }

  /**
   * @param from class to check for inheritors
   * @return inheritors of class
   */
  @NotNull
  static Collection<PyClass> getInheritors(@NotNull final PyClass from) {
    return PyClassInheritorsSearch.search(from, false).findAll();
  }


  public String getProcessedElementsHeader() {
    return HEADER;
  }

  public String getCodeReferencesText(int usagesCount, int filesCount) {
    return RefactoringBundle.message("classes.to.push.down.members.to", UsageViewBundle.getReferencesString(usagesCount, filesCount));
  }

  @Nullable
  public String getCommentReferencesText(int usagesCount, int filesCount) {
    return null;
  }

  @Override
  protected String getCommandName() {
    return PyPushDownHandler.REFACTORING_NAME;
  }
}