/*
* $HeadURL: http://svn.apache.org/repos/asf/httpcomponents/httpcore/trunk/module-main/src/main/java/org/apache/http/message/BasicNameValuePair.java $
* $Revision: 604625 $
* $Date: 2007-12-16 06:11:11 -0800 (Sun, 16 Dec 2007) $
*
* ====================================================================
* 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.http.message;
import org.apache.http.NameValuePair;
import org.apache.http.util.CharArrayBuffer;
import org.apache.http.util.LangUtils;
/**
* A simple class encapsulating an attribute/value pair.
* <p>
* This class comforms to the generic grammar and formatting rules outlined in the
* <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec2.html#sec2.2">Section 2.2</a>
* and
* <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.6">Section 3.6</a>
* of <a href="http://www.w3.org/Protocols/rfc2616/rfc2616.txt">RFC 2616</a>
* </p>
* <h>2.2 Basic Rules</h>
* <p>
* The following rules are used throughout this specification to describe basic parsing constructs.
* The US-ASCII coded character set is defined by ANSI X3.4-1986.
* </p>
* <pre>
* OCTET = <any 8-bit sequence of data>
* CHAR = <any US-ASCII character (octets 0 - 127)>
* UPALPHA = <any US-ASCII uppercase letter "A".."Z">
* LOALPHA = <any US-ASCII lowercase letter "a".."z">
* ALPHA = UPALPHA | LOALPHA
* DIGIT = <any US-ASCII digit "0".."9">
* CTL = <any US-ASCII control character
* (octets 0 - 31) and DEL (127)>
* CR = <US-ASCII CR, carriage return (13)>
* LF = <US-ASCII LF, linefeed (10)>
* SP = <US-ASCII SP, space (32)>
* HT = <US-ASCII HT, horizontal-tab (9)>
* <"> = <US-ASCII double-quote mark (34)>
* </pre>
* <p>
* Many HTTP/1.1 header field values consist of words separated by LWS or special
* characters. These special characters MUST be in a quoted string to be used within
* a parameter value (as defined in section 3.6).
* <p>
* <pre>
* token = 1*<any CHAR except CTLs or separators>
* separators = "(" | ")" | "<" | ">" | "@"
* | "," | ";" | ":" | "\" | <">
* | "/" | "[" | "]" | "?" | "="
* | "{" | "}" | SP | HT
* </pre>
* <p>
* A string of text is parsed as a single word if it is quoted using double-quote marks.
* </p>
* <pre>
* quoted-string = ( <"> *(qdtext | quoted-pair ) <"> )
* qdtext = <any TEXT except <">>
* </pre>
* <p>
* The backslash character ("\") MAY be used as a single-character quoting mechanism only
* within quoted-string and comment constructs.
* </p>
* <pre>
* quoted-pair = "\" CHAR
* </pre>
* <h>3.6 Transfer Codings</h>
* <p>
* Parameters are in the form of attribute/value pairs.
* </p>
* <pre>
* parameter = attribute "=" value
* attribute = token
* value = token | quoted-string
* </pre>
*
* @author <a href="mailto:oleg at ural.com">Oleg Kalnichevski</a>
*
*/
public class BasicNameValuePair implements NameValuePair, Cloneable {
private final String name;
private final String value;
/**
* Default Constructor taking a name and a value. The value may be null.
*
* @param name The name.
* @param value The value.
*/
public BasicNameValuePair(final String name, final String value) {
super();
if (name == null) {
throw new IllegalArgumentException("Name may not be null");
}
this.name = name;
this.value = value;
}
/**
* Returns the name.
*
* @return String name The name
*/
public String getName() {
return this.name;
}
/**
* Returns the value.
*
* @return String value The current value.
*/
public String getValue() {
return this.value;
}
/**
* Get a string representation of this pair.
*
* @return A string representation.
*/
public String toString() {
// don't call complex default formatting for a simple toString
int len = this.name.length();
if (this.value != null)
len += 1 + this.value.length();
CharArrayBuffer buffer = new CharArrayBuffer(len);
buffer.append(this.name);
if (this.value != null) {
buffer.append("=");
buffer.append(this.value);
}
return buffer.toString();
}
public boolean equals(final Object object) {
if (object == null) return false;
if (this == object) return true;
if (object instanceof NameValuePair) {
BasicNameValuePair that = (BasicNameValuePair) object;
return this.name.equals(that.name)
&& LangUtils.equals(this.value, that.value);
} else {
return false;
}
}
public int hashCode() {
int hash = LangUtils.HASH_SEED;
hash = LangUtils.hashCode(hash, this.name);
hash = LangUtils.hashCode(hash, this.value);
return hash;
}
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
}