com.google.appengine.repackaged.org.eclispe.jetty.util.resource.ResourceCollection Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995-2022 Mort Bay Consulting Pty Ltd and others.
// ------------------------------------------------------------------------
// 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.net.MalformedURLException;
import java.net.URL;
import java.nio.channels.ReadableByteChannel;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
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)
{
Collections.addAll(list, ((ResourceCollection)r).getResources());
}
else
{
list.add(r);
}
}
_resources = list.toArray(new Resource[0]);
for (Resource r : _resources)
{
assertResourceValid(r);
}
}
/**
* Instantiates a new resource collection.
*
* @param resources the resource strings to be added to collection
*/
public ResourceCollection(String[] resources)
{
if (resources == null || resources.length == 0)
{
_resources = null;
return;
}
ArrayList res = new ArrayList<>();
try
{
for (String strResource : resources)
{
if (strResource == null || strResource.length() == 0)
{
throw new IllegalArgumentException("empty/null resource path not supported");
}
Resource resource = Resource.newResource(strResource);
assertResourceValid(resource);
res.add(resource);
}
if (res.isEmpty())
{
_resources = null;
return;
}
_resources = res.toArray(new Resource[0]);
}
catch (RuntimeException e)
{
throw e;
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
/**
* Instantiates a new resource collection.
*
* @param csvResources the string containing comma-separated resource strings
*/
public ResourceCollection(String csvResources)
{
setResourcesAsCSV(csvResources);
}
/**
* Retrieves the resource collection's resources.
*
* @return the resource array
*/
public Resource[] getResources()
{
return _resources;
}
/**
* Sets the resource collection's resources.
*
* @param resources the new resource array
*/
public void setResources(Resource[] resources)
{
if (resources == null || resources.length == 0)
{
_resources = null;
return;
}
List res = new ArrayList<>();
for (Resource resource : resources)
{
assertResourceValid(resource);
res.add(resource);
}
if (res.isEmpty())
{
_resources = null;
return;
}
_resources = res.toArray(new Resource[0]);
}
/**
* Sets the resources as string of comma-separated values.
* This method should be used when configuring jetty-maven-plugin.
*
* @param csvResources the comma-separated string containing
* one or more resource strings.
*/
public void setResourcesAsCSV(String csvResources)
{
if (csvResources == null)
{
throw new IllegalArgumentException("CSV String is null");
}
StringTokenizer tokenizer = new StringTokenizer(csvResources, ",;");
int len = tokenizer.countTokens();
if (len == 0)
{
throw new IllegalArgumentException("ResourceCollection@setResourcesAsCSV(String) " +
" argument must be a string containing one or more comma-separated resource strings.");
}
List res = new ArrayList<>();
try
{
while (tokenizer.hasMoreTokens())
{
String token = tokenizer.nextToken().trim();
// TODO: If we want to support CSV tokens with spaces then we should not trim here
// However, if we decide to to this, then CVS formatting/syntax becomes more strict.
if (token.length() == 0)
{
continue; // skip
}
Resource resource = Resource.newResource(token);
assertResourceValid(resource);
res.add(resource);
}
if (res.isEmpty())
{
_resources = null;
return;
}
_resources = res.toArray(new Resource[0]);
}
catch (RuntimeException e)
{
throw e;
}
catch (Exception e)
{
throw new RuntimeException(e);
}
}
/**
* @param path The path segment to add
* @return The contained resource (found first) in the collection of resources
*/
@Override
public Resource addPath(String path) throws IOException
{
assertResourcesSet();
if (path == null)
{
throw new MalformedURLException();
}
if (path.length() == 0 || URIUtil.SLASH.equals(path))
{
return this;
}
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 (resources == null)
{
resources = new ArrayList<>();
}
if (resource != null)
{
resources.add(resource);
resource = null;
}
resources.add(r);
}
}
if (resource != null)
{
return resource;
}
if (resources != null)
{
return new ResourceCollection(resources.toArray(new Resource[0]));
}
throw new MalformedURLException();
}
@Override
public boolean delete() throws SecurityException
{
throw new UnsupportedOperationException();
}
@Override
public boolean exists()
{
assertResourcesSet();
return true;
}
@Override
public File getFile() throws IOException
{
assertResourcesSet();
for (Resource r : _resources)
{
File f = r.getFile();
if (f != null)
{
return f;
}
}
return null;
}
@Override
public InputStream getInputStream() throws IOException
{
assertResourcesSet();
for (Resource r : _resources)
{
InputStream is = r.getInputStream();
if (is != null)
{
return is;
}
}
return null;
}
@Override
public ReadableByteChannel getReadableByteChannel() throws IOException
{
assertResourcesSet();
for (Resource r : _resources)
{
ReadableByteChannel channel = r.getReadableByteChannel();
if (channel != null)
{
return channel;
}
}
return null;
}
@Override
public String getName()
{
assertResourcesSet();
for (Resource r : _resources)
{
String name = r.getName();
if (name != null)
{
return name;
}
}
return null;
}
@Override
public URL getURL()
{
assertResourcesSet();
for (Resource r : _resources)
{
URL url = r.getURL();
if (url != null)
{
return url;
}
}
return null;
}
@Override
public boolean isDirectory()
{
assertResourcesSet();
return true;
}
@Override
public long lastModified()
{
assertResourcesSet();
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()
{
assertResourcesSet();
HashSet set = new HashSet<>();
for (Resource r : _resources)
{
String[] list = r.list();
if (list != null)
Collections.addAll(set, list);
}
String[] result = set.toArray(new String[0]);
Arrays.sort(result);
return result;
}
@Override
public void close()
{
assertResourcesSet();
for (Resource r : _resources)
{
r.close();
}
}
@Override
public boolean renameTo(Resource dest) throws SecurityException
{
throw new UnsupportedOperationException();
}
@Override
public void copyTo(File destination)
throws IOException
{
assertResourcesSet();
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 || _resources.length == 0)
{
return "[]";
}
return String.valueOf(Arrays.asList(_resources));
}
@Override
public boolean isContainedIn(Resource r)
{
// TODO could look at implementing the semantic of is this collection a subset of the Resource r?
return false;
}
private void assertResourcesSet()
{
if (_resources == null || _resources.length == 0)
{
throw new IllegalStateException("*resources* not set.");
}
}
private void assertResourceValid(Resource resource)
{
if (resource == null)
{
throw new IllegalStateException("Null resource not supported");
}
if (!resource.exists() || !resource.isDirectory())
{
throw new IllegalArgumentException(resource + " is not an existing directory.");
}
}
}