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如何自由组织Tapestry页面规范文件

王朝other·作者佚名  2008-05-19
窄屏简体版  字體: |||超大  

问题的提出:

默认Tapestry的页面模板文件(.html)及其对应的规范文件(.page),可以放在web根目录或其下的WEB-INF/目录中,Tapestry可以不用任何配置(在以前的版本中需要在.application文件中定义一下页面)就能正确运行,如果你需要在这些根目录下以文件系统的目录形式组织你的页面,则Tapestry是不会自动搜索这些子目录的,你必须在.application文件中定义这些不在默认位置的页面。这样一来,每加一个页面都需要定义一下,如果页面数目众多,定义起来就会比较麻烦,如何才能避免这些配置呢?本文的目的就是尝试解决这个问题。

问题的解决:

本文是在参考文档(http://www.behindthesite.com/blog/C1931765677/E381917869/index.html)源代码的基础上稍作修改而成,主要是为了解决不能在Tomcat中使用的问题。为了更好的了解,朋友们最好能阅读一下原文和原来的代码。主要修改的地方是给RecursiveFileLocator传递一个真实路径地址,以便能够列出目录下面的子目录,从而实现层次查找。

解决的途径就是定义一个ISpecificationResolverDelegate,以便Tapestry在常规路径下找不到文件时进行处理。

CustomSpecificationResolver.java:

// CustomSpecificationResolver.java

//

// Copyright 2004 Michael J. Henderson & Associates LLC

//

// 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 com.mjhenderson.users.tapestry;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.apache.tapestry.INamespace;

import org.apache.tapestry.IRequestCycle;

import org.apache.tapestry.IResourceLocation;

import org.apache.tapestry.Tapestry;

import org.apache.tapestry.engine.ISpecificationSource;

import org.apache.tapestry.resolver.ISpecificationResolverDelegate;

import org.apache.tapestry.spec.IComponentSpecification;

/**

* @author <a href="mailto:michaelh@mjhenderson.com?subject=com.mjhenderson.users.tapestry.CustomSpecificationResolver"Mike Henderson</a

*

*/

public class CustomSpecificationResolver implements

ISpecificationResolverDelegate {

private static final Log LOG = LogFactory.getLog(RecursiveFileLocator.class);

private ISpecificationSource _specificationSource;

private RecursiveFileLocator _locator;

//private boolean _applicationIsExplodedWAR;

private boolean _initialized;

private String _folder;

private String _realRootFolder;

public CustomSpecificationResolver() {;

}

public void setFolder(String value) {

_folder = value;

}

public String getFolder() {

return _folder;

}

private void _init(IRequestCycle cycle) {

//IResourceLocation rootLocation = Tapestry.getApplicationRootLocation(cycle).getRelativeLocation("/WEB-INF/");

IResourceLocation rootLocation = Tapestry.getApplicationRootLocation(cycle).getRelativeLocation("/");

//_applicationIsExplodedWAR = rootLocation.getResourceURL().toString().startsWith("file:");

//if (_applicationIsExplodedWAR) {

_realRootFolder = cycle.getRequestContext().getServlet().getServletContext().getRealPath("/");

_locator = new RecursiveFileLocator(rootLocation,_realRootFolder);

_specificationSource = cycle.getEngine().getSpecificationSource();

//}

_initialized = true;

}

//

private boolean checkLocationIsFileLocation(IResourceLocation location) {

//

String url = location.getResourceURL().toString();

//

System.out.println("url = "+url);

//

return url.startsWith("file:");

//

}

/**

* @see org.apache.tapestry.resolver.ISpecificationResolverDelegate#findPageSpecification(org.apache.tapestry.IRequestCycle, org.apache.tapestry.INamespace, java.lang.String)

*/

public IComponentSpecification findPageSpecification(IRequestCycle cycle,

INamespace namespace, String name) {

if (!_initialized) {

_init(cycle);

}

//if (!_applicationIsExplodedWAR) {

//

return null;

//}

IResourceLocation location = _locator.resolveLocation(name+".page");

if (location != null) {

return _specificationSource.getPageSpecification(location);

}

return null;

}

/**

* @see org.apache.tapestry.resolver.ISpecificationResolverDelegate#findComponentSpecification(org.apache.tapestry.IRequestCycle, org.apache.tapestry.INamespace, java.lang.String)

*/

public IComponentSpecification findComponentSpecification(

IRequestCycle cycle, INamespace namespace, String type) {

if (!_initialized) {

_init(cycle);

}

//if (!_applicationIsExplodedWAR) {

//

return null;

//}

IResourceLocation location = _locator.resolveLocation(type+".jwc");

if (location != null) {

return _specificationSource.getComponentSpecification(location);

}

return null;

}

}

RecursiveFileLocator.java:

// RecursiveFileLocator.java

//

// Copyright 2004 Michael J. Henderson & Associates LLC

//

// 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 com.mjhenderson.users.tapestry;

import java.io.File;

import java.net.URL;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.Iterator;

import java.util.List;

import java.util.Map;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.apache.tapestry.IResourceLocation;

/**

* @author <a href="mailto:michaelh@mjhenderson.com?subject=com.mjhenderson.users.tapestry.RecursiveFileLocator"Mike Henderson</a

*

*/

public class RecursiveFileLocator {

private static final Log LOG = LogFactory.getLog(RecursiveFileLocator.class);

private IResourceLocation

_location;

private File realRoot ;

private Map _locations

= new HashMap();

public RecursiveFileLocator(IResourceLocation location,String _realRootFolder) {

realRoot = new

 
 
 
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