org.frameworkset.web.servlet.view.InternalResourceViewResolver Maven / Gradle / Ivy
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/*
* Copyright 2008 biaoping.yin
*
* 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.frameworkset.web.servlet.view;
import org.frameworkset.util.ClassUtils;
/**
* Title: InternalResourceViewResolver.java
* Description:
* bboss workgroup
* Copyright (c) 2008
* @Date 2010-9-26
* @author biaoping.yin
* @version 1.0
*/
public class InternalResourceViewResolver extends UrlBasedViewResolver {
private static final boolean jstlPresent = ClassUtils.isPresent(
"javax.servlet.jsp.jstl.core.Config", InternalResourceViewResolver.class.getClassLoader());
private Boolean alwaysInclude;
private Boolean exposeContextBeansAsAttributes;
private String[] exposedContextBeanNames;
/**
* Sets the default {@link #setViewClass view class} to {@link #requiredViewClass}:
* by default {@link InternalResourceView}, or {@link JstlView} if the JSTL API
* is present.
*/
public InternalResourceViewResolver() {
Class viewClass = requiredViewClass();
if (viewClass.equals(InternalResourceView.class) && jstlPresent) {
viewClass = JstlView.class;
}
setViewClass(viewClass);
}
/**
* This resolver requires {@link InternalResourceView}.
*/
protected Class requiredViewClass() {
return InternalResourceView.class;
}
/**
* Specify whether to always include the view rather than forward to it.
* Default is "false". Switch this flag on to enforce the use of a
* Servlet include, even if a forward would be possible.
* @see InternalResourceView#setAlwaysInclude
*/
public void setAlwaysInclude(boolean alwaysInclude) {
this.alwaysInclude = Boolean.valueOf(alwaysInclude);
}
/**
* Set whether to make all Bboss beans in the application context accessible
* as request attributes, through lazy checking once an attribute gets accessed.
*
This will make all such beans accessible in plain ${...}
* expressions in a JSP 2.0 page, as well as in JSTL's c:out
* value expressions.
*
Default is "false".
* @see InternalResourceView#setExposeContextBeansAsAttributes
*/
public void setExposeContextBeansAsAttributes(boolean exposeContextBeansAsAttributes) {
this.exposeContextBeansAsAttributes = Boolean.valueOf(exposeContextBeansAsAttributes);
}
/**
* Specify the names of beans in the context which are supposed to be exposed.
* If this is non-null, only the specified beans are eligible for exposure as
* attributes.
* @see InternalResourceView#setExposedContextBeanNames
*/
public void setExposedContextBeanNames(String[] exposedContextBeanNames) {
this.exposedContextBeanNames = exposedContextBeanNames;
}
protected AbstractUrlBasedView buildView(String viewName) throws Exception {
InternalResourceView view = (InternalResourceView) super.buildView(viewName);
if (this.alwaysInclude != null) {
view.setAlwaysInclude(this.alwaysInclude.booleanValue());
}
if (this.exposeContextBeansAsAttributes != null) {
view.setExposeContextBeansAsAttributes(this.exposeContextBeansAsAttributes.booleanValue());
}
if (this.exposedContextBeanNames != null) {
view.setExposedContextBeanNames(this.exposedContextBeanNames);
}
view.setPreventDispatchLoop(true);
return view;
}
}