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/*
 *
 * Copyright (c) 2013 - 2018 Lijun Liao
 *
 * 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.xipki.http.servlet;

import java.net.URISyntaxException;

/**
 * TODO.
 * @author Lijun Liao
 * @since 2.2.0
 */

// CHECKSTYLE:SKIP
public class ServletURIPool {

  private static final ServletURI SLASH_URI;

  private static SimpleLruCache uriMap = new SimpleLruCache<>(100);

  static {
    try {
      SLASH_URI = new ServletURI("/");
    } catch (URISyntaxException ex) {
      throw new ExceptionInInitializerError("could not create ServletURI: " + ex.getMessage());
    }
  }

  private ServletURIPool() {
  }

  // CHECKSTYLE:SKIP
  public static ServletURI getServletURI(String uri) throws URISyntaxException {
    if (uri == null || uri.isEmpty() || uri.equals("/")) {
      return SLASH_URI;
    } else if (uri.length() > 50) {
      return new ServletURI(uri);
    } else {
      // cache only short URI
      ServletURI uriObj = uriMap.get(uri);
      if (uriObj == null) {
        uriObj = new ServletURI(uri);
        uriMap.put(uri, uriObj);
      }
      return uriObj;
    }
  }

}