com.jianggujin.http.util.JKeyVal Maven / Gradle / Ivy

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package com.jianggujin.http.util;

import java.io.InputStream;

/**
 * 键值对
 * 
 * @author jianggujin
 *
 */
public class JKeyVal {
   /**
    * 键
    */
   private String key;
   /**
    * 值
    */
   private String value;
   /**
    * 输入流
    */
   private InputStream stream;

   /**
    * 创建键值对
    * 
    * @param key
    *           健
    * @param value
    *           值
    * @return keyvalue
    */
   public static JKeyVal create(String key, String value) {
      return new JKeyVal().key(key).value(value);
   }

   /**
    * 创建键值对
    * 
    * @param key
    *           健
    * @param filename
    *           文件名
    * @param stream
    *           文件输入流
    * @return keyvalue
    */
   public static JKeyVal create(String key, String filename, InputStream stream) {
      return new JKeyVal().key(key).value(filename).inputStream(stream);
   }

   private JKeyVal() {
   }

   /**
    * 设置键
    * 
    * @param key
    *           健
    * @return keyvalue
    */
   public JKeyVal key(String key) {
      if (JDataUtils.isEmpty(key)) {
         throw new IllegalArgumentException("Data key must not be empty");
      }
      this.key = key;
      return this;
   }

   /**
    * 获得键
    * 
    * @return key
    */
   public String key() {
      return key;
   }

   /**
    * 设置值
    * 
    * @param value
    *           值
    * @return keyvalue
    */
   public JKeyVal value(String value) {
      if (value == null) {
         throw new IllegalArgumentException("Data value must not be null");
      }
      this.value = value;
      return this;
   }

   /**
    * 获得值
    * 
    * @return value
    */
   public String value() {
      return value;
   }

   /**
    * 设置输入流
    * 
    * @param in
    * @return
    */
   public JKeyVal inputStream(InputStream in) {
      if (in == null) {
         throw new IllegalArgumentException("Data input stream must not be null");
      }
      this.stream = in;
      return this;
   }

   /**
    * 获得输入流
    * 
    * @return
    */
   public InputStream inputStream() {
      return stream;
   }

   /**
    * 判断是否有输入流
    * 
    * @return
    */
   public boolean hasInputStream() {
      return stream != null;
   }

   @Override
   public String toString() {
      return key + "=" + value;
   }
}