/*
* Copyright 2013 Robert von Burg <eitch@eitchnet.ch>
*
* 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 li.strolch.xmlpers.util;
import java.text.MessageFormat;
import li.strolch.xmlpers.api.XmlPersistenceException;
import li.strolch.xmlpers.impl.PathBuilder;
public class FilenameUtility {
public static String getId(String filename) {
assertFilename(filename);
return filename.substring(0, filename.length() - PathBuilder.EXT_LENGTH);
}
public static void assertFilename(String filename) {
if (filename.charAt(filename.length() - PathBuilder.EXT_LENGTH) != '.') {
String msg = "The filename does not have a . (dot) at index {0}"; //$NON-NLS-1$
msg = MessageFormat.format(msg, (filename.length() - PathBuilder.EXT_LENGTH));
throw new XmlPersistenceException(msg);
}
}
}