package cn.home1.oss.lib.errorhandle.api;
   
   import static com.google.common.collect.Lists.newArrayList;
   
   import com.fasterxml.jackson.annotation.JsonProperty;
   
   import lombok.Data;
   
   import org.springframework.http.HttpHeaders;
  
  import java.io.Serializable;
  import java.util.Arrays;
  import java.util.List;
  
  import javax.xml.bind.annotation.XmlAccessType;
  import javax.xml.bind.annotation.XmlAccessorType;
  import javax.xml.bind.annotation.XmlElement;
  import javax.xml.bind.annotation.XmlElementWrapper;
  import javax.xml.bind.annotation.XmlRootElement;
  
  /**
   * Created by zhanghaolun on 16/8/12.
   */
  @XmlRootElement(name = "header")
  @XmlAccessorType(XmlAccessType.FIELD)
  @Data
  public class HttpHeader implements Serializable {
  
    @JsonProperty("name")
    @XmlElement(name = "name")
    private String name;
    @JsonProperty("values")
    @XmlElementWrapper(name = "values")
    @XmlElement(name = "value")
    private String[] values;
  
    public static HttpHeaders toHttpHeaders(final HttpHeader... headers) {
      final HttpHeaders result;
      if (headers == null) {
        result = null;
      } else {
        result = new HttpHeaders();
        for (final HttpHeader header : headers) {
          result.put(header.getName(), newArrayList(header.getValues()));
        }
      }
      return result;
    }
  
    public static HttpHeader[] fromHttpHeaders(final HttpHeaders headers) {
      final HttpHeader[] result;
      if (headers == null) {
        result = null;
      } else {
        result = headers.entrySet().stream() //
          .map(entry -> {
            // final String name = entry.getKey();
            final List<String> value = entry.getValue();
            final HttpHeader header = new HttpHeader();
            header.setName(entry.getKey());
            header.setValues(value != null ? value.toArray(new String[value.size()]) : new String[]{});
            return header;
          }) //
          .toArray(size -> new HttpHeader[size]);
      }
      return result;
    }
  
    public String getName() {
      return this.name;
    }
  
    public String[] getValues() {
      return this.values != null ? Arrays.copyOf(this.values, this.values.length) : null;
    }
  }