package org.apache.velocity.app.event.implement; /* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF 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 * * 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. */ import org.apache.velocity.app.event.IncludeEventHandler; import org.apache.velocity.context.Context; import org.apache.velocity.runtime.RuntimeServices; import org.apache.velocity.util.ContextAware; import org.apache.velocity.util.RuntimeServicesAware; import org.apache.commons.lang3.StringUtils; import org.slf4j.Logger; /** * Simple event handler that checks to see if an included page is available. * If not, it includes a designated replacement page instead. * *
By default, the name of the replacement page is "notfound.vm", however this
* page name can be changed by setting the Velocity property
* eventhandler.include.notfound
, for example:
* eventhandler.include.notfound = error.vm
*
* The name of the missing resource is put into the Velocity context, under the
* key "missingResource", so that the "notfound" template can report the missing
* resource with a Velocity reference, like:
* $missingResource
*