com.dianping.lion.util.UrlUtils.java Source code

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Here is the source code for com.dianping.lion.util.UrlUtils.java

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/**
 * Project: com.dianping.lion.lion-console-0.0.1
 * 
 * File Created at 2012-7-11
 * $Id$
 * 
 * Copyright 2010 dianping.com.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information of
 * Dianping Company. ("Confidential Information").  You shall not
 * disclose such Confidential Information and shall use it only in
 * accordance with the terms of the license agreement you entered into
 * with dianping.com.
 */
package com.dianping.lion.util;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import org.apache.commons.lang.ArrayUtils;
import org.apache.commons.lang.StringUtils;

/**
 * @author danson.liu
 *
 */
public class UrlUtils {

    public static String resolveUrl(Map<String, ?> parameters, String... includes) {
        StringBuilder url = new StringBuilder();
        int index = 0;
        try {
            if (parameters != null) {
                for (Entry<String, ?> entry : parameters.entrySet()) {
                    Collection<Object> paramValues = new ArrayList<Object>();
                    Object paramValue = entry.getValue();
                    if (ArrayUtils.isEmpty(includes) || ArrayUtils.contains(includes, entry.getKey())) {
                        Class<? extends Object> paramClass = paramValue.getClass();
                        if (Collection.class.isInstance(paramValue)) {
                            paramValues.addAll((Collection<?>) paramValue);
                        } else if (paramClass.isArray()) {
                            Object[] valueArray = (Object[]) paramValue;
                            for (Object value : valueArray) {
                                paramValues.add(value);
                            }
                        } else {
                            paramValues.add(paramValue);
                        }
                        for (Object value : paramValues) {
                            url.append(index++ == 0 ? "" : "&").append(entry.getKey()).append("=")
                                    .append(URLEncoder.encode(value.toString(), "utf-8"));
                        }
                    }
                }
            }
        } catch (UnsupportedEncodingException e) {
            throw new RuntimeException(e);
        }
        return url.toString();
    }

    public static String resolveUrl(String url, Map<String, ?> parameters, String... includes) {
        if (url == null) {
            throw new NullPointerException("Param[url] cannot be null.");
        }
        return resolveUrl(url, resolveUrl(parameters, includes));
    }

    public static String resolveUrl(String url, String paramStr) {
        return url + (url.contains("?") ? "&" : "?") + paramStr;
    }

    public static List<String> getParameterNames(String url) {
        if (url == null) {
            throw new NullPointerException("Param[url] cannot be null.");
        }
        List<String> parameterNames = new ArrayList<String>();
        String queryString = StringUtils.substringAfter(url, "?");
        if (queryString != null) {
            String[] segments = StringUtils.split(queryString, "&");
            for (String segment : segments) {
                String param = StringUtils.substringBefore(segment, "=");
                if (!parameterNames.contains(param)) {
                    parameterNames.add(param);
                }
            }
        }
        return parameterNames;
    }

}