package org.oxerr.okcoin.rest.dto.valuereader;
   
   import java.io.IOException;
   import java.io.InputStream;
   import java.nio.charset.Charset;
   
   import com.fasterxml.jackson.databind.JsonMappingException;
   import com.fasterxml.jackson.databind.ObjectMapper;
   
  public class JsonValueReader<T> implements ValueReader<T> {
  
  	private final ObjectMapper objectMapper;
  
  	private final Class<T> valueType;
  
  	public JsonValueReader(ObjectMapper objectMapper, Class<T> valueType) {
  		this.objectMapper = objectMapper;
  		this.valueType = valueType;
  	}
  
  	/**
  	 * {@inheritDoc}
  	 */
  	@Override
  	public T read(InputStream inputStream, String mimeType, Charset charset) throws IOException {
  		try {
  			return objectMapper.readValue(inputStream, valueType);
  		} catch (JsonMappingException jme) {
  			if (jme.getCause() instanceof RuntimeException) {
  				throw (RuntimeException) jme.getCause();
  			} else {
  				throw jme;
  			}
  		}
  	}
  
  }