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ScalateView.scala
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ScalateView.scala
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/**
* Copyright (C) 2009-2011 the original author or authors.
* See the notice.md file distributed with this work for additional
* information regarding copyright ownership.
*
* 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 org.fusesource.scalate.spring.view
import _root_.java.util.Locale
import _root_.javax.servlet.http.HttpServletRequest
import _root_.javax.servlet.http.HttpServletResponse
import _root_.org.fusesource.scalate.RenderContext
import _root_.org.fusesource.scalate.servlet.ServletRenderContext
import _root_.org.fusesource.scalate.servlet.ServletTemplateEngine
import _root_.scala.collection.JavaConverters._
import _root_.org.fusesource.scalate.TemplateException
import _root_.org.springframework.web.servlet.view.{ AbstractView, AbstractTemplateView }
import _root_.org.slf4j.LoggerFactory
import org.fusesource.scalate.util.ResourceNotFoundException
trait ScalateRenderStrategy {
protected val log = LoggerFactory.getLogger(getClass)
def render(context: ServletRenderContext, model: Map[String, Any]): Unit
}
trait LayoutScalateRenderStrategy
extends AbstractTemplateView
with ScalateRenderStrategy {
def templateEngine: ServletTemplateEngine
def render(context: ServletRenderContext, model: Map[String, Any]): Unit = {
log.debug("Rendering view with name '" + getUrl + "' with model " + model)
for ((key, value) <- model) {
context.attributes(key) = value
}
templateEngine.layout(getUrl, context)
}
}
trait DefaultScalateRenderStrategy
extends AbstractTemplateView
with ScalateRenderStrategy {
override def render(context: ServletRenderContext, model: Map[String, Any]): Unit = {
log.debug("Rendering view with name '" + getUrl + "' with model " + model)
context.render(getUrl, model)
}
}
trait ViewScalateRenderStrategy
extends ScalateRenderStrategy {
override def render(context: ServletRenderContext, model: Map[String, Any]): Unit = {
log.debug("Rendering with model " + model)
val it = model.get("it")
if (it.isEmpty)
throw new TemplateException("No 'it' model object specified. Cannot render request")
context.view(it.get.asInstanceOf[AnyRef])
}
}
trait AbstractScalateView extends AbstractView {
var templateEngine: ServletTemplateEngine = _
def checkResource(locale: Locale): Boolean
}
class ScalateUrlView
extends AbstractTemplateView
with AbstractScalateView
with LayoutScalateRenderStrategy {
override def renderMergedTemplateModel(
model: java.util.Map[String, Object],
request: HttpServletRequest,
response: HttpServletResponse): Unit = {
val context = new ServletRenderContext(templateEngine, request, response, getServletContext)
RenderContext.using(context) {
render(context, model.asInstanceOf[java.util.Map[String, Any]].asScala.toMap)
}
}
override def checkResource(locale: Locale): Boolean = try {
log.debug("Checking for resource " + getUrl)
templateEngine.load(getUrl)
true
} catch {
case e: ResourceNotFoundException => {
log.info("Could not find resource " + getUrl)
false
}
}
}
class ScalateView
extends AbstractScalateView
with ViewScalateRenderStrategy {
override def checkResource(locale: Locale) = true
override def renderMergedOutputModel(
model: java.util.Map[String, Object],
request: HttpServletRequest,
response: HttpServletResponse): Unit = {
val context = new ServletRenderContext(templateEngine, request, response, getServletContext)
RenderContext.using(context) {
render(context, model.asInstanceOf[java.util.Map[String, Any]].asScala.toMap)
}
}
}