plugins/maven/src/main/java/org/jetbrains/idea/maven/navigator/actions/ExecuteMavenGoalHistoryService.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 org.jetbrains.idea.maven.navigator.actions;

import com.intellij.openapi.components.*;
import com.intellij.openapi.project.Project;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;

/**
 * @author Sergey Evdokimov
 */
@State(
    name = "mavenExecuteGoalHistory",
    storages = @Storage(file = StoragePathMacros.WORKSPACE_FILE)
)
public class ExecuteMavenGoalHistoryService implements PersistentStateComponent<String[]> {

  private static final int MAX_HISTORY_LENGTH = 20;

  private final LinkedList<String> myHistory = new LinkedList<String>();

  private String myWorkDirectory = "";

  private String myCanceledCommand;

  public static ExecuteMavenGoalHistoryService getInstance(@NotNull Project project) {
    return ServiceManager.getService(project, ExecuteMavenGoalHistoryService.class);
  }

  @Nullable
  public String getCanceledCommand() {
    return myCanceledCommand;
  }

  public void setCanceledCommand(@Nullable String canceledCommand) {
    myCanceledCommand = canceledCommand;
  }

  public void addCommand(@NotNull String command, @NotNull String projectPath) {
    myWorkDirectory = projectPath.trim();

    command = command.trim();

    if (command.length() == 0) return;

    myHistory.remove(command);
    myHistory.addFirst(command);

    while (myHistory.size() > MAX_HISTORY_LENGTH) {
      myHistory.removeLast();
    }
  }

  public List<String> getHistory() {
    return new ArrayList<String>(myHistory);
  }

  @NotNull
  public String getWorkDirectory() {
    return myWorkDirectory;
  }

  @Nullable
  @Override
  public String[] getState() {
    String[] res = new String[myHistory.size() + 1];
    res[0] = myWorkDirectory;
    
    int i = 1;
    for (String goal : myHistory) {
      res[i++] = goal;
    }
    
    return res;
  }

  @Override
  public void loadState(String[] state) {
    if (state.length == 0) {
      myWorkDirectory = "";
      myHistory.clear();
    }
    else {
      myWorkDirectory = state[0];
      myHistory.addAll(Arrays.asList(state).subList(1, state.length));
    }
  }
}