com.github.pires.obd.commands.PersistentObdCommand Maven / Gradle / Ivy

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/**
 * 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.
 */
/**
 * 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.github.pires.obd.commands;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;

/**
 * Base persistent OBD command.
 */
public abstract class PersistentObdCommand extends ObdCommand {

  private static Map knownValues = new HashMap();
  private static Map> knownBuffers = new HashMap>();

  public PersistentObdCommand(String command) {
    super(command);
  }

  public static void reset() {
    knownValues = new HashMap();
    knownBuffers = new HashMap>();
  }

  public PersistentObdCommand(ObdCommand other) {
    this(other.cmd);
  }

  @Override
  protected void readResult(InputStream in) throws IOException {
    super.readResult(in);
    String key = getClass().getSimpleName();
    knownValues.put(key, rawData);
    knownBuffers.put(key, new ArrayList(buffer));
  }

  @Override
  public void run(InputStream in, OutputStream out) throws IOException, InterruptedException {
    String key = getClass().getSimpleName();
    if (knownValues.containsKey(key)) {
      rawData = knownValues.get(key);
      buffer = knownBuffers.get(key);
      performCalculations();
    } else {
      super.run(in, out);
    }
  }

  public static boolean knows(Class cmd) {
    String key = cmd.getSimpleName();
    return knownValues.containsKey(key);
  }
}