org.eclipse.jetty.util.resource.ResourceCollection Maven / Gradle / Ivy
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//
// ========================================================================
// Copyright (c) 1995-2012 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.util.resource;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.nio.channels.ReadableByteChannel;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import java.util.StringTokenizer;
import org.eclipse.jetty.util.URIUtil;
/**
* A collection of resources (dirs).
* Allows webapps to have multiple (static) sources.
* The first resource in the collection is the main resource.
* If a resource is not found in the main resource, it looks it up in
* the order the resources were constructed.
*
*
*
*/
public class ResourceCollection extends Resource
{
private Resource[] _resources;
/* ------------------------------------------------------------ */
/**
* Instantiates an empty resource collection.
*
* This constructor is used when configuring jetty-maven-plugin.
*/
public ResourceCollection()
{
_resources = new Resource[0];
}
/* ------------------------------------------------------------ */
/**
* Instantiates a new resource collection.
*
* @param resources the resources to be added to collection
*/
public ResourceCollection(Resource... resources)
{
List list = new ArrayList();
for (Resource r : resources)
{
if (r==null)
continue;
if (r instanceof ResourceCollection)
{
for (Resource r2 : ((ResourceCollection)r).getResources())
list.add(r2);
}
else
list.add(r);
}
_resources = list.toArray(new Resource[list.size()]);
for(Resource r : _resources)
{
if(!r.exists() || !r.isDirectory())
throw new IllegalArgumentException(r + " is not an existing directory.");
}
}
/* ------------------------------------------------------------ */
/**
* Instantiates a new resource collection.
*
* @param resources the resource strings to be added to collection
*/
public ResourceCollection(String[] resources)
{
_resources = new Resource[resources.length];
try
{
for(int i=0; i resources = null;
int i=0;
for(; i<_resources.length; i++)
{
resource = _resources[i].addPath(path);
if (resource.exists())
{
if (resource.isDirectory())
break;
return resource;
}
}
for(i++; i<_resources.length; i++)
{
Resource r = _resources[i].addPath(path);
if (r.exists() && r.isDirectory())
{
if (resource!=null)
{
resources = new ArrayList();
resources.add(resource);
resource=null;
}
resources.add(r);
}
}
if (resource!=null)
return resource;
if (resources!=null)
return new ResourceCollection(resources.toArray(new Resource[resources.size()]));
return null;
}
/* ------------------------------------------------------------ */
/**
* @param path
* @return the resource(file) if found, returns a list of resource dirs if its a dir, else null.
* @throws IOException
* @throws MalformedURLException
*/
protected Object findResource(String path) throws IOException, MalformedURLException
{
Resource resource=null;
ArrayList resources = null;
int i=0;
for(; i<_resources.length; i++)
{
resource = _resources[i].addPath(path);
if (resource.exists())
{
if (resource.isDirectory())
break;
return resource;
}
}
for(i++; i<_resources.length; i++)
{
Resource r = _resources[i].addPath(path);
if (r.exists() && r.isDirectory())
{
if (resource!=null)
{
resources = new ArrayList();
resources.add(resource);
}
resources.add(r);
}
}
if (resource!=null)
return resource;
if (resources!=null)
return resources;
return null;
}
/* ------------------------------------------------------------ */
@Override
public boolean delete() throws SecurityException
{
throw new UnsupportedOperationException();
}
/* ------------------------------------------------------------ */
@Override
public boolean exists()
{
if(_resources==null)
throw new IllegalStateException("*resources* not set.");
return true;
}
/* ------------------------------------------------------------ */
@Override
public File getFile() throws IOException
{
if(_resources==null)
throw new IllegalStateException("*resources* not set.");
for(Resource r : _resources)
{
File f = r.getFile();
if(f!=null)
return f;
}
return null;
}
/* ------------------------------------------------------------ */
@Override
public InputStream getInputStream() throws IOException
{
if(_resources==null)
throw new IllegalStateException("*resources* not set.");
for(Resource r : _resources)
{
InputStream is = r.getInputStream();
if(is!=null)
return is;
}
return null;
}
/* ------------------------------------------------------------ */
@Override
public ReadableByteChannel getReadableByteChannel() throws IOException
{
if(_resources==null)
throw new IllegalStateException("*resources* not set.");
for(Resource r : _resources)
{
ReadableByteChannel channel = r.getReadableByteChannel();
if(channel!=null)
return channel;
}
return null;
}
/* ------------------------------------------------------------ */
@Override
public String getName()
{
if(_resources==null)
throw new IllegalStateException("*resources* not set.");
for(Resource r : _resources)
{
String name = r.getName();
if(name!=null)
return name;
}
return null;
}
/* ------------------------------------------------------------ */
@Override
public OutputStream getOutputStream() throws IOException, SecurityException
{
if(_resources==null)
throw new IllegalStateException("*resources* not set.");
for(Resource r : _resources)
{
OutputStream os = r.getOutputStream();
if(os!=null)
return os;
}
return null;
}
/* ------------------------------------------------------------ */
@Override
public URL getURL()
{
if(_resources==null)
throw new IllegalStateException("*resources* not set.");
for(Resource r : _resources)
{
URL url = r.getURL();
if(url!=null)
return url;
}
return null;
}
/* ------------------------------------------------------------ */
@Override
public boolean isDirectory()
{
if(_resources==null)
throw new IllegalStateException("*resources* not set.");
return true;
}
/* ------------------------------------------------------------ */
@Override
public long lastModified()
{
if(_resources==null)
throw new IllegalStateException("*resources* not set.");
for(Resource r : _resources)
{
long lm = r.lastModified();
if (lm!=-1)
return lm;
}
return -1;
}
/* ------------------------------------------------------------ */
@Override
public long length()
{
return -1;
}
/* ------------------------------------------------------------ */
/**
* @return The list of resource names(merged) contained in the collection of resources.
*/
@Override
public String[] list()
{
if(_resources==null)
throw new IllegalStateException("*resources* not set.");
HashSet set = new HashSet();
for(Resource r : _resources)
{
for(String s : r.list())
set.add(s);
}
String[] result=set.toArray(new String[set.size()]);
Arrays.sort(result);
return result;
}
/* ------------------------------------------------------------ */
@Override
public void release()
{
if(_resources==null)
throw new IllegalStateException("*resources* not set.");
for(Resource r : _resources)
r.release();
}
/* ------------------------------------------------------------ */
@Override
public boolean renameTo(Resource dest) throws SecurityException
{
throw new UnsupportedOperationException();
}
/* ------------------------------------------------------------ */
@Override
public void copyTo(File destination)
throws IOException
{
for (int r=_resources.length;r-->0;)
_resources[r].copyTo(destination);
}
/* ------------------------------------------------------------ */
/**
* @return the list of resources separated by a path separator
*/
@Override
public String toString()
{
if(_resources==null)
return "[]";
return String.valueOf(Arrays.asList(_resources));
}
/* ------------------------------------------------------------ */
@Override
public boolean isContainedIn(Resource r) throws MalformedURLException
{
// TODO could look at implementing the semantic of is this collection a subset of the Resource r?
return false;
}
}