flex.messaging.config.ServletResourceResolver Maven / Gradle / Ivy
/*
* 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.
*/
package flex.messaging.config;
import flex.messaging.io.ArrayList;
import javax.servlet.ServletContext;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Set;
import java.util.Stack;
/**
*
*/
public class ServletResourceResolver implements ConfigurationFileResolver
{
private ServletContext context;
private Stack configurationPathStack = new Stack();
/**
* Constructor.
*
* @param context servlet context
*/
public ServletResourceResolver(ServletContext context)
{
this.context = context;
}
/**
* Is the configuration file available.
*
* @param path path to check
* @param throwError true if wmethod shold throw a ConfigurationException if path no found.
* @return true if path is available
* @throws ConfigurationException if throwError is true and path is not available
*/
public boolean isAvailable(String path, boolean throwError) throws ConfigurationException
{
boolean available = false;
InputStream is = context.getResourceAsStream(path);
if (is != null)
{
try { is.close(); } catch (IOException ignore) { /* ignore */}
pushConfigurationFile(path);
available = true;
}
else
{
if (throwError)
{
// Please specify a valid ''services.configuration.file'' in web.xml.
ConfigurationException e = new ConfigurationException();
e.setMessage(11108, new Object[] {path});
throw e;
}
}
return available;
}
public InputStream getConfigurationFile(String path)
{
InputStream is = context.getResourceAsStream(path);
if (is != null)
{
pushConfigurationFile(path);
return is;
}
else
{
// Please specify a valid ''services.configuration.file'' in web.xml.
ConfigurationException e = new ConfigurationException();
e.setMessage(11108, new Object[] {path});
throw e;
}
}
public InputStream getIncludedFile(String src)
{
String path = configurationPathStack.peek() + "/" + src;
InputStream is = context.getResourceAsStream(path);
if (is != null)
{
pushConfigurationFile(path);
return is;
}
else
{
// Please specify a valid include file. ''{0}'' is invalid.
ConfigurationException e = new ConfigurationException();
e.setMessage(11107, new Object[] {path});
throw e;
}
}
public void popIncludedFile()
{
configurationPathStack.pop();
}
/**
* Returns the list of XML files (denoted by .xml extension) in the directory
* relative to the current configuration file.
*/
public List getFiles(String dir)
{
List result = new ArrayList();
String prefix = configurationPathStack.peek() + "/";
Set paths = context.getResourcePaths(prefix + dir);
if (paths != null)
{
for (Object entry : paths)
{
String path = (String) entry;
if (path.endsWith(".xml"))
{
result.add(path.substring(prefix.length()));
}
}
return result;
}
else
{
// Please specify a valid include directory. ''{0}'' is invalid.
ConfigurationException e = new ConfigurationException();
e.setMessage(11113, new Object[]{dir});
throw e;
}
}
private void pushConfigurationFile(String path)
{
String topLevelPath = path.substring(0, path.lastIndexOf('/'));
configurationPathStack.push(topLevelPath);
}
}