library/src/test/java/com/datatorrent/lib/helper/OperatorContextTestHelper.java

/*
 *  Copyright (c) 2012-2013 DataTorrent, Inc.
 *  All Rights Reserved.
 */
package com.datatorrent.lib.helper;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;

import javax.annotation.Nonnull;

import com.datatorrent.api.Attribute;
import com.datatorrent.api.Context;
import com.datatorrent.api.Context.OperatorContext;

/**
 *
 */
public class OperatorContextTestHelper
{
  private final static ThreadLocal<DateFormat> DATE_FORMAT_THREAD_LOCAL = new ThreadLocal<DateFormat>()
  {
    @Override
    protected DateFormat initialValue()
    {
      return new SimpleDateFormat("yyyyMMddHHmmss");
    }

  };

  public static class TestIdOperatorContext extends TestContext implements OperatorContext
  {
    int id;
    com.datatorrent.api.Attribute.AttributeMap attributes;

    public TestIdOperatorContext(int id)
    {
      this.id = id;
    }

    public TestIdOperatorContext(int id, @Nonnull com.datatorrent.api.Attribute.AttributeMap map)
    {
      this.id = id;
      this.attributes = map;
    }

    @Override
    public int getId()
    {
      return id;
    }

    @Override
    public <T> T getValue(Attribute<T> key)
    {
      T value = attributes.get(key);
      if (value != null) {
        return value;
      }
      return super.getValue(key);
    }

    @Override
    public void setCounters(Object counters)
    {
      /* intentionally no-op */
    }

  }

  private static class TestContext implements Context
  {
    @Override
    public com.datatorrent.api.Attribute.AttributeMap getAttributes()
    {
      return null;
    }

    @Override
    public <T> T getValue(Attribute<T> key)
    {
      return key.defaultValue;
    }

    @Override
    public void setCounters(Object counters)
    {
      throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
    }

  }

  public static String getUniqueApplicationPath(String applicationPathPrefix)
  {
    Calendar calendar = Calendar.getInstance();
    return applicationPathPrefix + DATE_FORMAT_THREAD_LOCAL.get().format(calendar.getTime());
  }

}