FlashChartRequestMapper.java

/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU General Public License, version 2 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/gpl-2.0.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 General Public License for more details.
 *
 *
 * Copyright 2006 - 2008 Pentaho Corporation.  All rights reserved. 
 * 
 * @created May 31, 2006 
 * @author James Dixon
 */

package org.pentaho.platform.uifoundation.chart;

import java.math.BigDecimal;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Set;

import org.pentaho.platform.api.engine.IParameterProvider;
import org.pentaho.platform.engine.core.solution.SimpleParameterProvider;
import org.pentaho.platform.util.ParameterHelper;

public class FlashChartRequestMapper extends SimpleParameterProvider {

  private IParameterProvider request;

  private final HashMap chartParams = new HashMap();

  private final Set keySet = new HashSet();

  public FlashChartRequestMapper(final IParameterProvider request) {
    this.request = request;
    Iterator it = request.getParameterNames();
    while (it.hasNext()) {
      keySet.add(it.next());
    }
    boolean isChart = "prochart".equals(request.getStringParameter("client", null)); //$NON-NLS-1$ //$NON-NLS-2$
    if (isChart) {
      String catName = request.getStringParameter("categoryName", null); //$NON-NLS-1$
      if (catName != null) {
        String value = request.getStringParameter("category", null); //$NON-NLS-1$
        if (value != null) {
          chartParams.put(catName, value);
          keySet.add(catName);
          keySet.remove("category"); //$NON-NLS-1$
          keySet.remove("categoryName"); //$NON-NLS-1$
        }
      }
      String seriesName = request.getStringParameter("seriesName", null); //$NON-NLS-1$
      if (seriesName != null) {
        String value = request.getStringParameter("series", null); //$NON-NLS-1$
        if (value != null) {
          chartParams.put(seriesName, value);
          keySet.add(seriesName);
          keySet.remove("series"); //$NON-NLS-1$
          keySet.remove("seriesName"); //$NON-NLS-1$
        }
      }
    }
  }

  @Override
  public String getStringParameter(final String name, final String defaultValue) {
    Object value = chartParams.get(name);
    if (value != null) {
      return value.toString();
    } else {
      return request.getStringParameter(name, defaultValue);
    }
  }

  @Override
  public long getLongParameter(final String name, final long defaultValue) {
    String value = (String) chartParams.get(name);
    if (value != null) {
      return ParameterHelper.parameterToLong(value, defaultValue);
    } else {
      return request.getLongParameter(name, defaultValue);
    }
  }

  @Override
  public Date getDateParameter(final String name, final Date defaultValue) {
    String value = (String) chartParams.get(name);
    if (value != null) {
      return ParameterHelper.parameterToDate(value, defaultValue);
    } else {
      return request.getDateParameter(name, defaultValue);
    }
  }

  @Override
  public BigDecimal getDecimalParameter(final String name, final BigDecimal defaultValue) {
    String value = (String) chartParams.get(name);
    if (value != null) {
      return ParameterHelper.parameterToDecimal(value, defaultValue);
    } else {
      return request.getDecimalParameter(name, defaultValue);
    }
  }

  @Override
  public Iterator getParameterNames() {
    return keySet.iterator();
  }

  @Override
  public Object getParameter(final String name) {
    Object value = chartParams.get(name);
    if (value != null) {
      return value;
    } else {
      return request.getParameter(name);
    }
  }

}