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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.certsrv.common;
import java.util.Enumeration;
import java.util.Hashtable;
import java.util.StringTokenizer;
import java.util.Vector;
/**
* A class represents an ordered list of name
* value pairs.
*
* @version $Revision$, $Date$
*/
public class NameValuePairs {
private Vector mPairs = new Vector();
// an index to speed up searching
// The key is the name. The element is the NameValuePair.
private Hashtable index = new Hashtable();
/**
* Constructs name value pairs.
*/
public NameValuePairs() {
}
/**
* Adds a name value pair into this set.
* if the name already exist, the value will
* be replaced.
*
* @param name name
* @param value value
*/
public void add(String name, String value) {
NameValuePair pair = getPair(name);
if (pair == null) {
pair = new NameValuePair(name, value);
mPairs.addElement(pair);
index.put(name, pair);
} else {
pair.setValue(value);
}
}
/**
* Retrieves name value pair from this set.
*
* @param name name
* @return name value pair
*/
public NameValuePair getPair(String name) {
return (NameValuePair) index.get(name);
}
/**
* Returns number of pairs in this set.
*
* @return size
*/
public int size() {
return mPairs.size();
}
/**
* Retrieves name value pairs in specific position.
*
* @param pos position of the value
* @return name value pair
*/
public NameValuePair elementAt(int pos) {
return (NameValuePair) mPairs.elementAt(pos);
}
/**
* Removes all name value pairs in this set.
*/
public void removeAllPairs() {
mPairs.removeAllElements();
index.clear();
}
/**
* Retrieves value of the name value pairs that matches
* the given name.
*
* @param name name
* @return value
*/
public String getValue(String name) {
NameValuePair p = getPair(name);
if (p != null) {
return p.getValue();
}
return null;
}
/**
* Retrieves a list of names.
*
* @return a list of names
*/
public Enumeration getNames() {
Vector v = new Vector();
int size = mPairs.size();
for (int i = 0; i < size; i++) {
NameValuePair p = (NameValuePair) mPairs.elementAt(i);
v.addElement(p.getName());
}
//System.out.println("getNames: "+v.size());
return v.elements();
}
/**
* Show the content of this name value container as
* string representation.
*
* @return string representation
*/
public String toString() {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < mPairs.size(); i++) {
NameValuePair p = (NameValuePair) mPairs.elementAt(i);
buf.append(p.getName() + "=" + p.getValue());
buf.append("\n");
}
return buf.toString();
}
/**
* Parses a string into name value pairs.
*
* @param s string
* @param nvp name value pairs
* @return true if successful
*/
public static boolean parseInto(String s, NameValuePairs nvp) {
StringTokenizer st = new StringTokenizer(s, "&");
while (st.hasMoreTokens()) {
String t = st.nextToken();
int i = t.indexOf("=");
if (i == -1) {
return false;
}
String n = t.substring(0, i);
String v = t.substring(i + 1);
nvp.add(n, v);
}
return true;
}
/**
* Returns a list of name value pair object.
*
* @return name value objects
*/
public Enumeration elements() {
return mPairs.elements();
}
}
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