/*

  * Copyright 2004-2011 the Seasar Foundation and the Others.

  *

  * 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.seasar.teeda.core.render.html.support;

 import java.net.URI;

 import java.util.Iterator;

 import java.util.LinkedHashMap;

 import java.util.Map;

 /**

  * @author manhole

  */

 public class UrlBuilder {

     private String base;

     private String parameterDelimiter = "&";

     private final Map urlParameters = new LinkedHashMap() {

         private static final long serialVersionUID = 1L;

         public Object get(Object key) {

             Object value = super.get(key);

             if (value != null) {

                 return value;

             }

             UrlParameter p = new UrlParameter();

             p.setKey((String) key);

             put(key, p);

             return p;

         }

     };

     public void setBase(final String base) {

         this.base = base;

     }

     public void setParameterDelimiter(String delimiter) {

         this.parameterDelimiter = delimiter;

     }

     public String build() {

         final StringBuffer sb = new StringBuffer(100);

         final URI uri = URI.create(base);

         if (uri.getScheme() != null) {

             sb.append(uri.getScheme());

             sb.append(":");

         }

         // [scheme:]scheme-specific-part[#fragment]

         // [scheme:][//authority][path][?query][#fragment]

         // server-based-authority=[user-info@]host[:port]

         if (uri.getAuthority() != null) {

             sb.append("//");

             sb.append(uri.getAuthority());

         }

         if (uri.getPath() != null) {

             sb.append(uri.getPath());

         } else if (uri.getSchemeSpecificPart() != null) {

             sb.append(uri.getSchemeSpecificPart());

         }

         boolean questionAppeared = false;

         if (uri.getQuery() != null) {

             questionAppeared = true;

             sb.append('?');

             sb.append(uri.getQuery());

         }

         for (final Iterator it = urlParameters.entrySet().iterator(); it

                 .hasNext();) {

             final Map.Entry entry = (Map.Entry) it.next();

             final String key = (String) entry.getKey();

             final UrlParameter parameter = (UrlParameter) entry.getValue();

             final String[] values = parameter.getValues();

             for (int i = 0; i < values.length; i++) {

                 final String value = values[i];

                 if (questionAppeared) {

                     sb.append(parameterDelimiter);

                 } else {

                     sb.append('?');

                     questionAppeared = true;

                 }

                 sb.append(key);

                 sb.append('=');

                 sb.append(value);

             }

         }

         if (uri.getFragment() != null) {

             sb.append('#');

             sb.append(uri.getFragment());

         }

         return new String(sb);

     }

     public void add(final String key, final String value) {

         final UrlParameter p = (UrlParameter) urlParameters.get(key);

         p.addValue(value);

     }

     /**

      * @return Returns the base.

      */

     public String getBase() {

         return base;

     }

     /**

      * @return Returns the urlParameters.

      */

     public Map getUrlParameters() {

         return urlParameters;

     }

 }