/*
* Copyright 2004, 2005, 2006 Odysseus Software GmbH
*
* 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 de.odysseus.calyxo.forms;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import java.util.StringTokenizer;
import de.odysseus.calyxo.base.ModuleContext;
import de.odysseus.calyxo.base.conf.ConfigException;
import de.odysseus.calyxo.forms.conf.FormsRootConfig;
import de.odysseus.calyxo.forms.conf.impl.FormsRootConfigParser;
/**
* Utility class to parse several configuration files, initialize and
* install {@link de.odysseus.calyxo.forms.FormsSupport} instance
*
* @author Christoph Beck
*/
public class FormsService {
private static final String VALIDATORS =
"/de/odysseus/calyxo/forms/conf/impl/calyxo-forms-validators.xml";
/**
* Initialize forms service.
* Parse the specified configuration files and pass the
* configuration root element to the specified forms support.
* Finally, save the support object in module scope.
* @param context the module we're in
* @param support the support instance to initialize and save
* @param config comma-separated list of configuration files
* @throws ConfigException
*/
public void init(ModuleContext context, FormsSupport support, FormFactory factory, String config)
throws ConfigException {
ArrayList list = new ArrayList();
// add predefined validators
list.add(getClass().getResource(VALIDATORS));
// add user-defined config-files
StringTokenizer tokens = new StringTokenizer(config,",");
while (tokens.hasMoreTokens()) {
String token = tokens.nextToken().trim();
URL url = null;
try {
url = context.getServletContext().getResource(token);
} catch (MalformedURLException e) {
throw new ConfigException(e);
}
if (url == null) {
throw new ConfigException("Could not find resource " + token);
} else {
list.add(url);
}
}
URL[] urls = (URL[])list.toArray(new URL[list.size()]);
FormsRootConfig formsConfig = null;
FormsRootConfigParser parser =
new FormsRootConfigParser(context);
formsConfig = parser.parse(urls);
support.init(context, formsConfig, factory);
// save support instance in application scope
context.setAttribute(FormsSupport.FORMS_SUPPORT_KEY, support);
}
public void destroy(ModuleContext context) {
context.removeAttribute(FormsSupport.FORMS_SUPPORT_KEY);
}
}