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package cgeo.geocaching;
import org.apache.http.NameValuePair;
import org.apache.http.client.utils.URLEncodedUtils;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.protocol.HTTP;
import java.security.InvalidParameterException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
/**
* List of key/values pairs to be used in a GET or POST request.
*
*/
public class Parameters extends ArrayList<NameValuePair> {
private static final long serialVersionUID = 1L;
/**
* @param keyValues
* list of initial key/value pairs
* @throws InvalidParameterException
* if the number of key/values is unbalanced
*/
public Parameters(final String... keyValues) {
super();
put(keyValues);
}
private static final Comparator<NameValuePair> comparator = new Comparator<NameValuePair>() {
@Override
public int compare(final NameValuePair nv1, final NameValuePair nv2) {
final int comparedKeys = nv1.getName().compareTo(nv2.getName());
return comparedKeys != 0 ? comparedKeys : nv1.getValue().compareTo(nv2.getValue());
}
};
/**
* Add new key/value pairs to the current parameters.
*
* @param keyValues
* list of key/value pairs
* @throws InvalidParameterException
* if the number of key/values is unbalanced
*/
public void put(final String... keyValues) {
if (keyValues.length % 2 == 1) {
throw new InvalidParameterException("odd number of parameters");
}
for (int i = 0; i < keyValues.length; i += 2) {
add(new BasicNameValuePair(keyValues[i], keyValues[i + 1]));
}
}
/**
* Lexically sort key/value pairs first by key, then by value.
*
* Some signing algorithms need the values to be ordered before issuing the signature.
*/
public void sort() {
Collections.sort(this, comparator);
}
/**
* @return the URL encoded string corresponding to those parameters
*/
@Override
public String toString() {
return URLEncodedUtils.format(this, HTTP.UTF_8);
}
}
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