/*
* 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 org.apache.commons.mail.resolver;
import org.apache.commons.mail.ByteArrayDataSource;
import javax.activation.DataSource;
import javax.activation.FileTypeMap;
import java.io.IOException;
import java.io.InputStream;
/**
* Creates a <code>DataSource</code> based on an class path.
*
* @since 1.3
* @version $Id: DataSourceClassPathResolver.java 1420381 2012-12-11 20:18:05Z tn $
*/
public class DataSourceClassPathResolver extends DataSourceBaseResolver
{
/** the base string of the resource relative to the classpath when resolving relative paths */
private final String classPathBase;
/**
* Constructor
*/
public DataSourceClassPathResolver()
{
this.classPathBase = "/";
}
/**
* Constructor.
*
* @param classPathBase a base class path
*/
public DataSourceClassPathResolver(final String classPathBase)
{
this.classPathBase = classPathBase.endsWith("/") ? classPathBase : classPathBase + "/";
}
/**
* Constructor.
*
* @param classPathBase a base class path
* @param lenient shall we ignore resources not found or throw an exception?
*/
public DataSourceClassPathResolver(final String classPathBase, final boolean lenient)
{
super(lenient);
this.classPathBase = classPathBase.endsWith("/") ? classPathBase : classPathBase + "/";
}
/**
* @return the classPathBase
*/
public String getClassPathBase()
{
return classPathBase;
}
/** {@inheritDoc} */
public DataSource resolve(String resourceLocation) throws IOException
{
return resolve(resourceLocation, isLenient());
}
/** {@inheritDoc} */
public DataSource resolve(final String resourceLocation, final boolean isLenient) throws IOException
{
DataSource result = null;
try
{
if (!isCid(resourceLocation) && !isHttpUrl(resourceLocation))
{
String mimeType = FileTypeMap.getDefaultFileTypeMap().getContentType(resourceLocation);
String resourceName = getResourceName(resourceLocation);
InputStream is = DataSourceClassPathResolver.class.getResourceAsStream(resourceName);
if (is != null)
{
result = new ByteArrayDataSource(is, mimeType);
}
else
{
if (isLenient)
{
return null;
}
else
{
throw new IOException("The following class path resource was not found : " + resourceLocation);
}
}
}
return result;
}
catch (IOException e)
{
if (isLenient)
{
return null;
}
else
{
throw e;
}
}
}
/**
* Returns the resource name for a given resource location.
*
* @param resourceLocation the resource location
* @return {@link #getClassPathBase()} + {@code resourceLocation}
* @see #getClassPathBase()
*/
private String getResourceName(final String resourceLocation)
{
return (getClassPathBase() + resourceLocation).replaceAll("//", "/");
}
}