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/*
* 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) 2006 - 2009 Object Refinery Ltd, Pentaho Corporation and Contributors. All rights reserved.
*/
package org.pentaho.reporting.libraries.xmlns.writer;
import java.util.HashMap;
import java.util.Iterator;
import org.pentaho.reporting.libraries.base.config.Configuration;
/**
* Holds a set of namespace definitions that have been declared in a libbase-configuration.
*
* @author Thomas Morgner
*/
public class NamespaceCollection
{
private HashMap entries;
/**
* Default constructor.
*/
public NamespaceCollection()
{
entries = new HashMap();
}
/**
* Configures the namespace collection and adds all namespace definitions found in the configuration under
* the given prefix to the collection.
*
* @param config the configuration from where to read the namespaces.
* @param prefix the configuration prefix for filtering the configuration entries.
*/
public void configure(final Configuration config, final String prefix)
{
final Iterator keys = config.findPropertyKeys(prefix);
while (keys.hasNext())
{
final String key = (String) keys.next();
if (key.endsWith(".Uri") == false)
{
continue;
}
final String nsPrefix = key.substring(0, key.length() - 3);
final String uri = config.getConfigProperty(key);
if (uri == null)
{
continue;
}
final String trimmedUri = uri.trim();
if (trimmedUri.length() == 0)
{
continue;
}
final String prefixAttr = config.getConfigProperty(nsPrefix + "Prefix");
if (prefixAttr != null)
{
entries.put(trimmedUri, prefixAttr);
}
}
}
/**
* Returns the prefered namespace prefix for the given namespace URI.
*
* @param uri the namespace for which a prefix should be looked up.
* @return the defined prefix.
*/
public String getPrefix(final String uri)
{
return (String) entries.get(uri);
}
/**
* Returns all known namespaces for which definitions exist in this collection.
*
* @return the defined uris as array.
*/
public String[] getDefinedUris()
{
return (String[]) entries.keySet().toArray(new String[entries.size()]);
}
}
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