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  /* ************************************************************************
  #
  #  DivConq
  #
  #  http://divconq.com/
  #
  #  Copyright:
  #    Copyright 2014 eTimeline, LLC. All rights reserved.
  #
 #  License:
 #    See the license.txt file in the project's top-level directory for details.
 #
 #  Authors:
 #    * Andy White
 #
 ************************************************************************ */
 
 /*
  * Query.java February 2001
  *
  * Copyright (C) 2001, Niall Gallagher <niallg@users.sf.net>
  *
  * 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 divconq.www.http;
 
 import java.util.List;
 import java.util.Map;

The Query object is used to represent HTTP query parameters. Parameters are acquired by name and can be either a string, float, int, or boolean value. This ensures that data can be conveniently extracted in the correct type. This stores the parameters in a map of key value pairs. Each parameter can be acquired using the name of the parameter, if the parameter is named twice then all values can be acquired.

Author(s):
Niall Gallagher
 
 public interface Query extends Map<StringString> {
   
   
This method is used to acquire a List for all of the parameter values associated with the specified name. Using this method allows the query to expose many values taken from the query or HTTP form posting. Typically the first value in the list is the value from the get(String) method as this is the primary value from the ordered list of values.

Parameters:
name this is the name used to search for the value
Returns:
this is the list of values associated with the key
 
    List<StringgetAll(Object name);
   
   
This extracts an integer parameter for the named value. If the named parameter does not exist this will return a zero value. If however the parameter exists but is not in the format of a decimal integer value then this will throw an exception.

Parameters:
name the name of the parameter value to retrieve
Returns:
this returns the named parameter value as an integer
 
    int getInteger(Object name);

   
This extracts a float parameter for the named value. If the named parameter does not exist this will return a zero value. If however the parameter exists but is not in the format of a floating point number then this will throw an exception.

Parameters:
name the name of the parameter value to retrieve
Returns:
this returns the named parameter value as a float
 
    float getFloat(Object name);

   
This extracts a boolean parameter for the named value. If the named parameter does not exist this will return false otherwise the value is evaluated. If it is either true or false then those boolean values are returned.

Parameters:
name the name of the parameter value to retrieve
Returns:
this returns the named parameter value as an float
   boolean getBoolean(Object name);   

   
This will return all parameters represented using the HTTP URL query format. The x-www-form-urlencoded format is used to encode the attributes, see RFC 2616.

This will also encode any special characters that appear within the name and value pairs as an escaped sequence. If there are no parameters an empty string is returned.

Returns:
returns an empty string if the is no parameters
 
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