001/*
002 * Copyright 2010-2013 Ning, Inc.
003 *
004 * Ning licenses this file to you under the Apache License, version 2.0
005 * (the "License"); you may not use this file except in compliance with the
006 * License.  You may obtain a copy of the License at:
007 *
008 *    http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
012 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
013 * License for the specific language governing permissions and limitations
014 * under the License.
015 */
016
017package com.ning.billing.recurly;
018
019import java.util.regex.Matcher;
020import java.util.regex.Pattern;
021
022public abstract class PaginationUtils {
023
024    public static String[] getLinks(final String linkHeader) {
025        String start = null;
026        String prev = null;
027        String next = null;
028
029        final Pattern pattern = Pattern.compile("\\<([^>]+)\\>; rel=\\\"([^\"]+)\\\"");
030        final Matcher matcher = pattern.matcher(linkHeader);
031        while (matcher.find()) {
032            if ("start".equals(matcher.group(2))) {
033                start = matcher.group(1);
034            } else if ("prev".equals(matcher.group(2))) {
035                prev = matcher.group(1);
036            } else if ("next".equals(matcher.group(2))) {
037                next = matcher.group(1);
038            }
039        }
040
041        return new String[]{start, prev, next};
042    }
043}