/*
Copyright 2012 - 2014 Jerome Leleu
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 org.scribe.extractors;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.scribe.exceptions.OAuthException;
import org.scribe.model.Token;
import org.scribe.utils.Preconditions;
/**
* This class represents a specific JSON extractor for PayPal. It could be part of the Scribe library.
*
* @author Jerome Leleu
* @since 1.4.2
*/
public class PayPalJsonExtractor implements AccessTokenExtractor {
private final Pattern accessTokenPattern = Pattern.compile("\"access_token\":\\s*\"(\\S*?)\"");
public Token extract(final String response) {
Preconditions.checkEmptyString(response, "Cannot extract a token from a null or empty String");
final Matcher matcher = this.accessTokenPattern.matcher(response);
if (matcher.find()) {
return new Token(matcher.group(1), "", response);
} else {
throw new OAuthException("Cannot extract an acces token. Response was: " + response);
}
}
}