TwoURLsResource.java
/*
** Module : TwoURLsResource.java
** Abstract : Merges two Jetty resources into one.
**
** Copyright (c) 2017-2020, Golden Code Development Corporation.
**
** -#- -I- --Date-- ----------------Description----------------------
** 001 HC 20170925 Created initial version.
** 002 HC 20200313 Javadoc fixes.
*/
/*
** This program is free software: you can redistribute it and/or modify
** it under the terms of the GNU Affero General Public License as
** published by the Free Software Foundation, either version 3 of the
** License, or (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU Affero General Public License for more details.
**
** You may find a copy of the GNU Affero GPL version 3 at the following
** location: https://www.gnu.org/licenses/agpl-3.0.en.html
**
** Additional terms under GNU Affero GPL version 3 section 7:
**
** Under Section 7 of the GNU Affero GPL version 3, the following additional
** terms apply to the works covered under the License. These additional terms
** are non-permissive additional terms allowed under Section 7 of the GNU
** Affero GPL version 3 and may not be removed by you.
**
** 0. Attribution Requirement.
**
** You must preserve all legal notices or author attributions in the covered
** work or Appropriate Legal Notices displayed by works containing the covered
** work. You may not remove from the covered work any author or developer
** credit already included within the covered work.
**
** 1. No License To Use Trademarks.
**
** This license does not grant any license or rights to use the trademarks
** Golden Code, FWD, any Golden Code or FWD logo, or any other trademarks
** of Golden Code Development Corporation. You are not authorized to use the
** name Golden Code, FWD, or the names of any author or contributor, for
** publicity purposes without written authorization.
**
** 2. No Misrepresentation of Affiliation.
**
** You may not represent yourself as Golden Code Development Corporation or FWD.
**
** You may not represent yourself for publicity purposes as associated with
** Golden Code Development Corporation, FWD, or any author or contributor to
** the covered work, without written authorization.
**
** 3. No Misrepresentation of Source or Origin.
**
** You may not represent the covered work as solely your work. All modified
** versions of the covered work must be marked in a reasonable way to make it
** clear that the modified work is not originating from Golden Code Development
** Corporation or FWD. All modified versions must contain the notices of
** attribution required in this license.
*/
package com.goldencode.p2j.main;
import org.eclipse.jetty.util.resource.*;
import java.io.*;
import java.net.*;
import java.nio.channels.*;
/**
* Jetty resource implementation that is capable to merge two other resources.
*/
public class TwoURLsResource
extends Resource
{
/** First resource */
private Resource res1;
/** Second resource */
private Resource res2;
/**
* Ctor.
*
* @param res1
* First resource.
* @param res2
* Second resource.
*/
public TwoURLsResource(Resource res1, Resource res2)
{
this.res1 = res1;
this.res2 = res2;
}
/**
* Closes this stream and releases any system resources associated
* with it. If the stream is already closed then invoking this
* method has no effect.
*/
@Override
public synchronized void close()
{
res1.close();
res2.close();
}
/**
* Checks whether resource exists.
*
* @return see above
*/
@Override
public boolean exists()
{
return res1.exists() || res2.exists();
}
/**
* Returns is-directory flag.
*
* @return see above
*/
@Override
public boolean isDirectory()
{
return res1.isDirectory() || res2.isDirectory();
}
/**
* Returns the last-modified time stamp.
*
* @return see above
*/
@Override
public long lastModified()
{
return Math.max(res1.lastModified(), res2.lastModified());
}
/**
* Returns the stream byte length.
*
* @return see above
*/
@Override
public long length()
{
return -1;
}
/**
* Returns resource url.
*
* @return see above
*/
@Override
@Deprecated
public URL getURL()
{
return res1.getURL();
}
/**
* Returns resource file.
*
* @return see above
*/
@Override
public File getFile()
{
return null;
}
/**
* Returns rsource name.
*
* @return see above
*/
@Override
public String getName()
{
return res1.getName();
}
/**
* Returns resource as stream.
*
* @return see above
*/
@Override
public synchronized InputStream getInputStream()
{
return null;
}
/**
* Returns resource as {@link ReadableByteChannel}.
*
* @return see above
*/
@Override
public ReadableByteChannel getReadableByteChannel()
{
return null;
}
/**
* Deletes the resource.
*
* @return {@code true} if delete success
*/
@Override
public boolean delete()
{
throw new SecurityException("Delete not supported");
}
/**
* Renames resource to another resource.
*
* @param dest
* The destination resource.
*
* @return {@code true} if success
*/
@Override
public boolean renameTo(Resource dest)
{
throw new SecurityException("RenameTo not supported");
}
/**
* Lists the sub resources if any.
*
* @return array of sub resources, if none returns {@code null}
*/
@Override
public String[] list()
{
return null;
}
/**
* Adds a path to the resource and returns a new resource representing the path addition.
* The method is immutable.
*
* @param path
* The path to add.
*
* @return the new resource representing the result of the operation
*
* @throws IOException
* Thrown when the path doesn't exist.
*/
@Override
public Resource addPath(String path)
throws IOException
{
Resource res = res1.addPath(path);
if (res == null || !res.exists())
{
res = res2.addPath(path);
}
return res;
}
/**
* Returns the string representation.
*
* @return see above
*/
@Override
public String toString()
{
return res1.toString() + "; " + res2.toString();
}
/**
* Checks whether this resource is contained in the supplied resource.
*
* @return {@code true} if contained, {@code true} otherwise
*/
@Override
public boolean isContainedIn (Resource containingResource)
{
return false;
}
}