package com.google.sitebricks.client.transport;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.TypeFactory;
import com.google.inject.TypeLiteral;
import com.google.inject.Inject;
import com.google.inject.Singleton;

/**
 * @author Dhanji R. Prasanna (dhanji@gmail.com)
 */
@Singleton
public class JacksonJsonTransport extends Json {

  private final ObjectMapper objectMapper;

  @Inject
  public JacksonJsonTransport(ObjectMapper objectMapper) {
    this.objectMapper = objectMapper;
  }  
  
  public ObjectMapper getObjectMapper() {
    return objectMapper;
  }
  
  public <T> T in(InputStream in, Class<T> type) throws IOException {
    return objectMapper.readValue(in, type);
  }

  @Override
  public <T> T in(InputStream in, TypeLiteral<T> type) throws IOException {
    return objectMapper.readValue(in, TypeFactory.defaultInstance().constructType(type.getType()));
  }

  public <T> void out(OutputStream out, Class<T> type, T data) {
    try {
      objectMapper.writeValue(out, data);
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }


}