/*!
* 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 (c) 2002-2013 Pentaho Corporation.. All rights reserved.
*/
package org.pentaho.reporting.engine.classic.core;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import org.pentaho.reporting.libraries.base.config.Configuration;
public class DefaultReportEnvironmentMapping implements ReportEnvironmentMapping
{
public static final ReportEnvironmentMapping INSTANCE = new DefaultReportEnvironmentMapping();
private static final String ENV_MAPPING_KEY_PREFIX = "org.pentaho.reporting.engine.classic.core.env-mapping.";
private Map<String,String> cachedEnvironmentMapping;
public DefaultReportEnvironmentMapping()
{
preComputeEnvironmentMapping();
}
/**
* Creates a ordered map that contains the environment names as keys and the data-row column names as values.
*
* @return the mapping from environment names to data-row column names.
*/
public Map<String,String> createEnvironmentMapping()
{
return cachedEnvironmentMapping;
}
private void preComputeEnvironmentMapping()
{
if (cachedEnvironmentMapping == null)
{
final Configuration configuration = ClassicEngineBoot.getInstance().getGlobalConfig();
final Iterator propertyKeys = configuration.findPropertyKeys(ENV_MAPPING_KEY_PREFIX);
final LinkedHashMap<String,String> names = new LinkedHashMap<String,String>();
while (propertyKeys.hasNext())
{
final String key = (String) propertyKeys.next();
final String value = configuration.getConfigProperty(key);
final String shortKey = key.substring(ENV_MAPPING_KEY_PREFIX.length());
names.put(shortKey, value);
}
cachedEnvironmentMapping = Collections.unmodifiableMap(names);
}
}
}