org.kurento.client.internal.server.RemoteObjectManager Maven / Gradle / Ivy

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package org.kurento.client.internal.server;

import org.kurento.client.internal.transport.serialization.ObjectRefsManager;
import org.kurento.commons.SecretGenerator;

import com.google.common.collect.BiMap;
import com.google.common.collect.HashBiMap;

public class RemoteObjectManager implements ObjectRefsManager {

  // This class is used to control equals behavior of values in the biMap
  // regardless equals in remote classes
  public static class ObjectHolder {
    private Object object;

    public ObjectHolder(Object object) {
      this.object = object;
    }

    public Object getObject() {
      return object;
    }

    @Override
    public int hashCode() {
      return object.hashCode();
    }

    @Override
    public boolean equals(Object obj) {
      if (this == obj) {
        return true;
      }
      if (obj == null) {
        return false;
      }
      if (getClass() != obj.getClass()) {
        return false;
      }
      ObjectHolder other = (ObjectHolder) obj;
      return object == other.object;
    }
  }

  private SecretGenerator secretGenerator = new SecretGenerator();
  private BiMap remoteObjects = HashBiMap.create();

  public String putObject(Object object) {
    String nextSecret;
    do {
      nextSecret = secretGenerator.nextSecret();
    } while (remoteObjects.get(nextSecret) != null);

    remoteObjects.put(nextSecret, new ObjectHolder(object));

    return nextSecret;
  }

  @Override
  public Object getObject(String objectRef) {
    return remoteObjects.get(objectRef).getObject();
  }

  public void releaseObject(String objectRef) {
    this.remoteObjects.remove(objectRef);
  }

  public String getObjectRefFrom(Object object) {
    return remoteObjects.inverse().get(new ObjectHolder(object));
  }

}