package org.apache.http.message;

import org.apache.http.HeaderElement;
import org.apache.http.NameValuePair;
import org.apache.http.util.Args;
import org.apache.http.util.LangUtils;

public class BasicHeaderElement implements HeaderElement, Cloneable {
   private final String name;
   private final String value;
   private final NameValuePair[] parameters;

   public BasicHeaderElement(String name, String value, NameValuePair[] parameters) {
      this.name = (String)Args.notNull(name, "Name");
      this.value = value;
      if (parameters != null) {
         this.parameters = parameters;
      } else {
         this.parameters = new NameValuePair[0];
      }

   }

   public BasicHeaderElement(String name, String value) {
      this(name, value, (NameValuePair[])null);
   }

   public String getName() {
      return this.name;
   }

   public String getValue() {
      return this.value;
   }

   public NameValuePair[] getParameters() {
      return (NameValuePair[])this.parameters.clone();
   }

   public int getParameterCount() {
      return this.parameters.length;
   }

   public NameValuePair getParameter(int index) {
      return this.parameters[index];
   }

   public NameValuePair getParameterByName(String name) {
      Args.notNull(name, "Name");
      NameValuePair found = null;

      for(NameValuePair current : this.parameters) {
         if (current.getName().equalsIgnoreCase(name)) {
            found = current;
            break;
         }
      }

      return found;
   }

   public boolean equals(Object object) {
      if (this == object) {
         return true;
      } else if (!(object instanceof HeaderElement)) {
         return false;
      } else {
         BasicHeaderElement that = (BasicHeaderElement)object;
         return this.name.equals(that.name) && LangUtils.equals((Object)this.value, (Object)that.value) && LangUtils.equals((Object[])this.parameters, (Object[])that.parameters);
      }
   }

   public int hashCode() {
      int hash = 17;
      hash = LangUtils.hashCode(hash, this.name);
      hash = LangUtils.hashCode(hash, this.value);

      for(NameValuePair parameter : this.parameters) {
         hash = LangUtils.hashCode(hash, parameter);
      }

      return hash;
   }

   public String toString() {
      StringBuilder buffer = new StringBuilder();
      buffer.append(this.name);
      if (this.value != null) {
         buffer.append("=");
         buffer.append(this.value);
      }

      for(NameValuePair parameter : this.parameters) {
         buffer.append("; ");
         buffer.append(parameter);
      }

      return buffer.toString();
   }

   public Object clone() throws CloneNotSupportedException {
      return super.clone();
   }
}
