/**
* Licensed to Apereo under one or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information regarding copyright ownership. Apereo
* licenses this file to you 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 the
* following location:
*
* <p>http://www.apache.org/licenses/LICENSE-2.0
*
* <p>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 org.apereo.portal.utils.web.flow;
import com.google.common.collect.ImmutableList;
import java.util.List;
import org.springframework.web.servlet.View;
import org.springframework.webflow.execution.RequestContext;
import org.springframework.webflow.mvc.builder.DelegatingFlowViewResolver;
import org.springframework.webflow.mvc.view.FlowViewResolver;
/**
* FlowViewResolver that can use a list of both ViewResolver and FlowViewResolvers
*
*/
public class FallbackDelegatingFlowViewResolver extends DelegatingFlowViewResolver {
private final List<FlowViewResolver> flowViewResolvers;
public FallbackDelegatingFlowViewResolver(
List<FlowViewResolver> flowViewResolvers, List viewResolvers) {
super(viewResolvers);
this.flowViewResolvers = ImmutableList.copyOf(flowViewResolvers);
}
/* (non-Javadoc)
* @see org.springframework.webflow.mvc.builder.DelegatingFlowViewResolver#resolveView(java.lang.String, org.springframework.webflow.execution.RequestContext)
*/
@Override
public View resolveView(String viewId, RequestContext context) {
View view = super.resolveView(viewId, context);
if (view != null) {
return view;
}
for (final FlowViewResolver flowViewResolver : this.flowViewResolvers) {
try {
final String viewIdByConvention = flowViewResolver.getViewIdByConvention(viewId);
view = flowViewResolver.resolveView(viewIdByConvention, context);
if (view != null) {
return view;
}
} catch (Exception e) {
IllegalStateException ise =
new IllegalStateException(
"Exception resolving view with name '" + viewId + "'");
ise.initCause(e);
throw ise;
}
}
return null;
}
}