de.mklinger.qetcher.client.jetty.http.pathmap.PathMappings Maven / Gradle / Ivy
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//
// ========================================================================
// Copyright (c) 1995-2018 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.http.pathmap;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.TreeSet;
import java.util.function.Predicate;
import org.eclipse.jetty.util.ArrayTernaryTrie;
import org.eclipse.jetty.util.Trie;
import org.eclipse.jetty.util.annotation.ManagedAttribute;
import org.eclipse.jetty.util.annotation.ManagedObject;
import org.eclipse.jetty.util.component.ContainerLifeCycle;
import org.eclipse.jetty.util.component.Dumpable;
import org.eclipse.jetty.util.log.Log;
import org.eclipse.jetty.util.log.Logger;
/**
* Path Mappings of PathSpec to Resource.
*
* Sorted into search order upon entry into the Set
*
* @param the type of mapping endpoint
*/
@ManagedObject("Path Mappings")
public class PathMappings implements Iterable>, Dumpable
{
private static final Logger LOG = Log.getLogger(PathMappings.class);
private final Set> _mappings = new TreeSet<>();
private Trie> _exactMap=new ArrayTernaryTrie<>(false);
private Trie> _prefixMap=new ArrayTernaryTrie<>(false);
private Trie> _suffixMap=new ArrayTernaryTrie<>(false);
@Override
public String dump()
{
return ContainerLifeCycle.dump(this);
}
@Override
public void dump(Appendable out, String indent) throws IOException
{
out.append("PathMappings[size=").append(Integer.toString(_mappings.size())).append("]\n");
ContainerLifeCycle.dump(out, indent, _mappings);
}
@ManagedAttribute(value = "mappings", readonly = true)
public List> getMappings()
{
return new ArrayList<>(_mappings);
}
public int size()
{
return _mappings.size();
}
public void reset()
{
_mappings.clear();
_prefixMap.clear();
_suffixMap.clear();
}
public void removeIf(Predicate> predicate)
{
_mappings.removeIf(predicate);
}
/**
* Return a list of MappedResource matches for the specified path.
*
* @param path the path to return matches on
* @return the list of mapped resource the path matches on
*/
public List> getMatches(String path)
{
boolean isRootPath = "/".equals(path);
List> ret = new ArrayList<>();
for (MappedResource mr :_mappings)
{
switch (mr.getPathSpec().group)
{
case ROOT:
if (isRootPath)
ret.add(mr);
break;
case DEFAULT:
if (isRootPath || mr.getPathSpec().matches(path))
ret.add(mr);
break;
default:
if (mr.getPathSpec().matches(path))
ret.add(mr);
break;
}
}
return ret;
}
public MappedResource getMatch(String path)
{
PathSpecGroup last_group=null;
// Search all the mappings
for (MappedResource mr : _mappings)
{
PathSpecGroup group=mr.getPathSpec().getGroup();
if (group!=last_group)
{
// New group in list, so let's look for an optimization
switch(group)
{
case EXACT:
{
int i= path.length();
final Trie> exact_map=_exactMap;
while(i>=0)
{
MappedResource candidate=exact_map.getBest(path,0,i);
if (candidate==null)
break;
if (candidate.getPathSpec().matches(path))
return candidate;
i=candidate.getPathSpec().getPrefix().length()-1;
}
break;
}
case PREFIX_GLOB:
{
int i= path.length();
final Trie> prefix_map=_prefixMap;
while(i>=0)
{
MappedResource candidate=prefix_map.getBest(path,0,i);
if (candidate==null)
break;
if (candidate.getPathSpec().matches(path))
return candidate;
i=candidate.getPathSpec().getPrefix().length()-1;
}
break;
}
case SUFFIX_GLOB:
{
int i=0;
final Trie> suffix_map=_suffixMap;
while ((i=path.indexOf('.',i+1))>0)
{
MappedResource candidate=suffix_map.get(path,i+1,path.length()-i-1);
if (candidate!=null && candidate.getPathSpec().matches(path))
return candidate;
}
break;
}
default:
}
}
if (mr.getPathSpec().matches(path))
return mr;
last_group=group;
}
return null;
}
@Override
public Iterator> iterator()
{
return _mappings.iterator();
}
public static PathSpec asPathSpec(String pathSpecString)
{
if ((pathSpecString == null) || (pathSpecString.length() < 1))
{
throw new RuntimeException("Path Spec String must start with '^', '/', or '*.': got [" + pathSpecString + "]");
}
return pathSpecString.charAt(0) == '^' ? new RegexPathSpec(pathSpecString):new ServletPathSpec(pathSpecString);
}
public E get(PathSpec spec)
{
Optional optionalResource = _mappings.stream()
.filter(mappedResource -> mappedResource.getPathSpec().equals(spec))
.map(mappedResource -> mappedResource.getResource())
.findFirst();
if(!optionalResource.isPresent())
return null;
return optionalResource.get();
}
public boolean put(String pathSpecString, E resource)
{
return put(asPathSpec(pathSpecString),resource);
}
public boolean put(PathSpec pathSpec, E resource)
{
MappedResource entry = new MappedResource<>(pathSpec,resource);
switch (pathSpec.group)
{
case EXACT:
String exact = pathSpec.getPrefix();
while (exact!=null && !_exactMap.put(exact,entry))
_exactMap=new ArrayTernaryTrie<>((ArrayTernaryTrie>)_exactMap,1.5);
break;
case PREFIX_GLOB:
String prefix = pathSpec.getPrefix();
while (prefix!=null && !_prefixMap.put(prefix,entry))
_prefixMap=new ArrayTernaryTrie<>((ArrayTernaryTrie>)_prefixMap,1.5);
break;
case SUFFIX_GLOB:
String suffix = pathSpec.getSuffix();
while (suffix!=null && !_suffixMap.put(suffix,entry))
_suffixMap=new ArrayTernaryTrie<>((ArrayTernaryTrie>)_prefixMap,1.5);
break;
default:
}
boolean added =_mappings.add(entry);
if (LOG.isDebugEnabled())
LOG.debug("{} {} to {}",added?"Added":"Ignored",entry,this);
return added;
}
@SuppressWarnings("incomplete-switch")
public boolean remove(PathSpec pathSpec)
{
switch (pathSpec.group)
{
case EXACT:
_exactMap.remove(pathSpec.getPrefix());
break;
case PREFIX_GLOB:
_prefixMap.remove(pathSpec.getPrefix());
break;
case SUFFIX_GLOB:
_suffixMap.remove(pathSpec.getSuffix());
break;
}
Iterator> iter = _mappings.iterator();
boolean removed=false;
while (iter.hasNext())
{
if (iter.next().getPathSpec().equals(pathSpec))
{
removed=true;
iter.remove();
break;
}
}
if (LOG.isDebugEnabled())
LOG.debug("{} {} to {}",removed?"Removed":"Ignored",pathSpec,this);
return removed;
}
@Override
public String toString()
{
return String.format("%s[size=%d]",this.getClass().getSimpleName(),_mappings.size());
}
}