Java URI to extractFromURIParams(String paramsRule, String uri)

Description

Extract and build a dispatch criteria string from URI parameters

License

Apache License

Parameter

Parameter	Description
paramsRule	The dispatch rules referencing parameters to consider
uri	The URI from which we should build a specific dispatch criteria

Return

A string representing a dispatch criteria for the corresponding incoming request.

Declaration

public static String extractFromURIParams(String paramsRule, String uri) 

Method Source Code

//package com.java2s;
/*//w  w  w .j  a  va 2 s  .c o  m
 * Licensed to Laurent Broudoux (the "Author") under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Author licenses this
 * file to you 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.
 */

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;

import java.util.Map;
import java.util.TreeMap;

public class Main {
    /**
     * Extract and build a dispatch criteria string from URI parameters
     * @param paramsRule The dispatch rules referencing parameters to consider
     * @param uri The URI from which we should build a specific dispatch criteria
     * @return A string representing a dispatch criteria for the corresponding incoming request.
     */
    public static String extractFromURIParams(String paramsRule, String uri) {
        Map<String, String> criteriaMap = new TreeMap<String, String>();

        if (uri.contains("?") && uri.contains("=")) {
            String parameters = uri.substring(uri.indexOf("?") + 1);

            for (String parameter : parameters.split("&")) {
                String[] pair = parameter.split("=");
                try {
                    String key = URLDecoder.decode(pair[0], "UTF-8");
                    String value = URLDecoder.decode(pair[1], "UTF-8");
                    criteriaMap.put(key, value);
                } catch (UnsupportedEncodingException e) {
                    e.printStackTrace();
                }
            }

            // Just appends sorted entries, separating them with ?.
            StringBuilder result = new StringBuilder();
            for (String criteria : criteriaMap.keySet()) {
                if (paramsRule.contains(criteria)) {
                    result.append("?").append(criteria).append("=").append(criteriaMap.get(criteria));
                }
            }
            return result.toString();
        }
        return "";
    }
}

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5. extractForwardURIFrom(URI requestURI)
6. extractHostAddress(String uri)
7. extractHostname(String uri)
8. extractLocalName(String uri)
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