/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*
*/
package org.apache.ogt.http.params;
/**
* HttpParams interface represents a collection of immutable values that define
* a runtime behavior of a component. HTTP parameters should be simple objects:
* integers, doubles, strings, collections and objects that remain immutable
* at runtime. HttpParams is expected to be used in 'write once - read many' mode.
* Once initialized, HTTP parameters are not expected to mutate in
* the course of HTTP message processing.
* <p>
* The purpose of this interface is to define a behavior of other components.
* Usually each complex component has its own HTTP parameter collection.
* <p>
* Instances of this interface can be linked together to form a hierarchy.
* In the simplest form one set of parameters can use content of another one
* to obtain default values of parameters not present in the local set.
*
* @see DefaultedHttpParams
*
* @since 4.0
*/
public interface HttpParams {
/**
* Obtains the value of the given parameter.
*
* @param name the parent name.
*
* @return an object that represents the value of the parameter,
* <code>null</code> if the parameter is not set or if it
* is explicitly set to <code>null</code>
*
* @see #setParameter(String, Object)
*/
Object getParameter(String name);
/**
* Assigns the value to the parameter with the given name.
*
* @param name parameter name
* @param value parameter value
*/
HttpParams setParameter(String name, Object value);
/**
* Creates a copy of these parameters.
*
* @return a new set of parameters holding the same values as this one
*
* @deprecated
*/
HttpParams copy();
/**
* Removes the parameter with the specified name.
*
* @param name parameter name
*
* @return true if the parameter existed and has been removed, false else.
*/
boolean removeParameter(String name);
/**
* Returns a {@link Long} parameter value with the given name.
* If the parameter is not explicitly set, the default value is returned.
*
* @param name the parent name.
* @param defaultValue the default value.
*
* @return a {@link Long} that represents the value of the parameter.
*
* @see #setLongParameter(String, long)
*/
long getLongParameter(String name, long defaultValue);
/**
* Assigns a {@link Long} to the parameter with the given name
*
* @param name parameter name
* @param value parameter value
*/
HttpParams setLongParameter(String name, long value);
/**
* Returns an {@link Integer} parameter value with the given name.
* If the parameter is not explicitly set, the default value is returned.
*
* @param name the parent name.
* @param defaultValue the default value.
*
* @return a {@link Integer} that represents the value of the parameter.
*
* @see #setIntParameter(String, int)
*/
int getIntParameter(String name, int defaultValue);
/**
* Assigns an {@link Integer} to the parameter with the given name
*
* @param name parameter name
* @param value parameter value
*/
HttpParams setIntParameter(String name, int value);
/**
* Returns a {@link Double} parameter value with the given name.
* If the parameter is not explicitly set, the default value is returned.
*
* @param name the parent name.
* @param defaultValue the default value.
*
* @return a {@link Double} that represents the value of the parameter.
*
* @see #setDoubleParameter(String, double)
*/
double getDoubleParameter(String name, double defaultValue);
/**
* Assigns a {@link Double} to the parameter with the given name
*
* @param name parameter name
* @param value parameter value
*/
HttpParams setDoubleParameter(String name, double value);
/**
* Returns a {@link Boolean} parameter value with the given name.
* If the parameter is not explicitly set, the default value is returned.
*
* @param name the parent name.
* @param defaultValue the default value.
*
* @return a {@link Boolean} that represents the value of the parameter.
*
* @see #setBooleanParameter(String, boolean)
*/
boolean getBooleanParameter(String name, boolean defaultValue);
/**
* Assigns a {@link Boolean} to the parameter with the given name
*
* @param name parameter name
* @param value parameter value
*/
HttpParams setBooleanParameter(String name, boolean value);
/**
* Checks if a boolean parameter is set to <code>true</code>.
*
* @param name parameter name
*
* @return <tt>true</tt> if the parameter is set to value <tt>true</tt>,
* <tt>false</tt> if it is not set or set to <code>false</code>
*/
boolean isParameterTrue(String name);
/**
* Checks if a boolean parameter is not set or <code>false</code>.
*
* @param name parameter name
*
* @return <tt>true</tt> if the parameter is either not set or
* set to value <tt>false</tt>,
* <tt>false</tt> if it is set to <code>true</code>
*/
boolean isParameterFalse(String name);
}