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package edu.isi.nlp.serialization.jackson;

import com.fasterxml.jackson.databind.Module;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.base.Supplier;
import com.google.common.base.Suppliers;
import java.util.List;

public final class JacksonUtils {

  private JacksonUtils() {
    throw new UnsupportedOperationException();
  }

  private static final Supplier> discoveredModules =
      Suppliers.memoize(
          new Supplier>() {
            @Override
            public List get() {
              return ObjectMapper.findModules();
            }
          });

  /**
   * Caches the results of {@link com.fasterxml.jackson.databind.ObjectMapper#findModules()}. Note
   * that if the classes available to your application change after the first call to these, the
   * returned list will be incorrect.
   */
  public static synchronized Supplier> discoverModulesWithCaching() {
    return discoveredModules;
  }
}