content: /*
   * Copyright (c) 2013. wyouflf (wyouflf@gmail.com)
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.lidroid.xutils.http.client.entity;
  
  import com.lidroid.xutils.http.client.util.URLEncodedUtils;
  import com.lidroid.xutils.util.LogUtils;
  import org.apache.http.NameValuePair;
  import org.apache.http.entity.AbstractHttpEntity;
  import org.apache.http.message.BasicNameValuePair;
  import org.apache.http.protocol.HTTP;
  
  import java.io.*;
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Author: wyouflf
   * Date: 13-7-26
   * Time: 下午4:21
   */
  public class BodyParamsEntity extends AbstractHttpEntity implements Cloneable {
  
      protected byte[] content;
  
      private boolean dirty = true;
  
      private String charset = HTTP.UTF_8;
  
      private List<NameValuePair> params;
  
      public BodyParamsEntity() {
          this((String) null);
      }
  
      public BodyParamsEntity(String charset) {
          super();
          if (charset != null) {
              this.charset = charset;
          }
          setContentType(URLEncodedUtils.CONTENT_TYPE);
          params = new ArrayList<NameValuePair>();
      }
  
      public BodyParamsEntity(List<NameValuePair> params) {
          this(params, null);
      }
  
      public BodyParamsEntity(List<NameValuePair> params, String charset) {
          super();
          if (charset != null) {
              this.charset = charset;
          }
          setContentType(URLEncodedUtils.CONTENT_TYPE);
          this.params = params;
          refreshContent();
      }
  
      public BodyParamsEntity addParameter(String name, String value) {
          this.params.add(new BasicNameValuePair(name, value));
          this.dirty = true;
          return this;
      }
  
      public BodyParamsEntity addParams(List<NameValuePair> params) {
          this.params.addAll(params);
          this.dirty = true;
          return this;
      }
  
      private void refreshContent() {
          if (dirty) {
              try {
                  this.content = URLEncodedUtils.format(params, charset).getBytes(charset);
              } catch (UnsupportedEncodingException e) {
                  LogUtils.e(e.getMessage(), e);
              }
              dirty = false;
          }
      }
  
      public boolean isRepeatable() {
          return true;
      }
  
      public long getContentLength() {
          refreshContent();
          return this.content.length;
      }
  
      public InputStream getContent() throws IOException {
          refreshContent();
          return new ByteArrayInputStream(this.content);
      }
  
      public void writeTo(final OutputStream outStream) throws IOException {
          if (outStream == null) {
              throw new IllegalArgumentException("Output stream may not be null");
          }
          refreshContent();
          outStream.write(this.content);
          outStream.flush();
      }
  
      /**
       * Tells that this entity is not streaming.
       *
       * @return <code>false</code>
       */
      public boolean isStreaming() {
          return false;
      }
  
      public Object clone() throws CloneNotSupportedException {
          return super.clone();
      }
  
  }
  