HttpRequestParameterProvider.java

/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html 
 * or from the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * Copyright 2005 - 2009 Pentaho Corporation.  All rights reserved.
 *
 *
 * @created Jul 11, 2005 
 * @author James Dixon
 * 
 */

package org.pentaho.platform.web.http.request;

import java.util.Iterator;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.pentaho.platform.engine.core.solution.SimpleParameterProvider;
import org.pentaho.platform.util.web.HttpUtil;

public class HttpRequestParameterProvider extends SimpleParameterProvider {

  private HttpServletRequest request;

  public HttpRequestParameterProvider(final HttpServletRequest request) {
    this.request = request;
    setServletRequestParameters(request.getParameterMap());

    if (request.getParameter(SimpleParameterProvider.ADDITIONAL_PARAMS) != null) {
      String additionalParameters = request.getParameter(SimpleParameterProvider.ADDITIONAL_PARAMS);
      int idx = additionalParameters.indexOf("?"); //$NON-NLS-1$
      if (idx > 0) {
        additionalParameters = additionalParameters.substring(idx + 1);
      }
      Map additionalParms = HttpUtil.parseQueryString(additionalParameters);
      setServletRequestParameters(additionalParms);
    }
  }

  /**
   * Converts single value arrays to String parameters
   *
   */
  private void setServletRequestParameters(final Map paramMap) {
    for (Iterator it = paramMap.entrySet().iterator(); it.hasNext();) {
      Map.Entry entry = (Map.Entry) it.next();
      Object value = entry.getValue();
      if (value != null) {
        if ((value instanceof Object[]) && (((Object[]) value).length == 1)) {
          setParameter((String) entry.getKey(), String.valueOf(((Object[]) value)[0]));
        } else {
          setParameter((String) entry.getKey(), value);
        }
      }
    }
  }

  public HttpServletRequest getRequest() {
    return request;
  }

}