/*
* Created on 03/lug/2010
*
* Copyright 2010 by Andrea Vacondio (andrea.vacondio@gmail.com).
*
* This file is part of the Sejda source code
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.sejda.core.support.prefix;
import static org.apache.commons.io.FilenameUtils.getBaseName;
import static org.apache.commons.io.FilenameUtils.getExtension;
import static org.sejda.core.support.prefix.model.NameGenerationRequest.nameRequest;
import static org.sejda.core.support.prefix.processor.PrefixUtils.toSafeFilename;
import org.apache.commons.lang3.StringUtils;
import org.sejda.core.support.prefix.model.NameGenerationRequest;
import org.sejda.core.support.prefix.processor.PrefixTypesChain;
/**
* Component used to generate the output name for a manipulation given the input prefix (if any);
*
* @author Andrea Vacondio
*/
public final class NameGenerator {
private String prefix;
private PrefixTypesChain prefixTypesChain;
private NameGenerator(String prefix) {
this.prefix = StringUtils.defaultString(prefix);
this.prefixTypesChain = new PrefixTypesChain(prefix);
}
/**
* @param prefix
* @return a new instance of a NameGenerator
*/
public static NameGenerator nameGenerator(String prefix) {
return new NameGenerator(prefix);
}
/**
* @param request
* parameters used to generate the name. It cannot be null.
* @return generates a new name from the given request
*/
public String generate(NameGenerationRequest request) {
if (request == null) {
throw new IllegalArgumentException("Unable to generate a name for a null request.");
}
String result = toSafeFilename(prefixTypesChain.process(prefix, preProcessRequest(request)));
if (result.length() > 255) {
String baseName = getBaseName(result);
String ext = getExtension(result);
return baseName.substring(0, 254 - ext.length()) + "." + ext;
}
return result;
}
/**
* pre process the request ensuring a not null request is returned
*
* @param request
* @return a not null request.
*/
private NameGenerationRequest preProcessRequest(NameGenerationRequest request) {
NameGenerationRequest retVal = request;
if (request == null) {
retVal = nameRequest();
}
return retVal;
}
}