org.eclipse.jetty.http.pathmap.PathMappings Maven / Gradle / Ivy
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//
// ========================================================================
// Copyright (c) 1995-2021 Mort Bay Consulting Pty Ltd and others.
//
// This program and the accompanying materials are made available under the
// terms of the Eclipse Public License v. 2.0 which is available at
// https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0
// which is available at https://www.apache.org/licenses/LICENSE-2.0.
//
// SPDX-License-Identifier: EPL-2.0 OR Apache-2.0
// ========================================================================
//
package org.eclipse.jetty.http.pathmap;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Comparator;
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.Index;
import org.eclipse.jetty.util.annotation.ManagedAttribute;
import org.eclipse.jetty.util.annotation.ManagedObject;
import org.eclipse.jetty.util.component.Dumpable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* 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 = LoggerFactory.getLogger(PathMappings.class);
private final Set> _mappings = new TreeSet<>(Comparator.comparing(MappedResource::getPathSpec));
private final Index.Mutable> _exactMap = new Index.Builder>()
.caseSensitive(true)
.mutable()
.build();
private final Index.Mutable> _prefixMap = new Index.Builder>()
.caseSensitive(true)
.mutable()
.build();
private final Index.Mutable> _suffixMap = new Index.Builder>()
.caseSensitive(true)
.mutable()
.build();
@Override
public String dump()
{
return Dumpable.dump(this);
}
@Override
public void dump(Appendable out, String indent) throws IOException
{
Dumpable.dumpObjects(out, indent, toString(), _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().getGroup())
{
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 lastGroup = null;
// Search all the mappings
for (MappedResource mr : _mappings)
{
PathSpecGroup group = mr.getPathSpec().getGroup();
if (group != lastGroup)
{
// New group in list, so let's look for an optimization
switch (group)
{
case EXACT:
{
int i = path.length();
while (i >= 0)
{
MappedResource candidate = _exactMap.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();
while (i >= 0)
{
MappedResource candidate = _prefixMap.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;
while ((i = path.indexOf('.', i + 1)) > 0)
{
MappedResource candidate = _suffixMap.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;
lastGroup = 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.getGroup())
{
case EXACT:
String exact = pathSpec.getPrefix();
if (exact != null)
_exactMap.put(exact, entry);
break;
case PREFIX_GLOB:
String prefix = pathSpec.getPrefix();
if (prefix != null)
_prefixMap.put(prefix, entry);
break;
case SUFFIX_GLOB:
String suffix = pathSpec.getSuffix();
if (suffix != null)
_suffixMap.put(suffix, entry);
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)
{
String prefix = pathSpec.getPrefix();
String suffix = pathSpec.getSuffix();
switch (pathSpec.getGroup())
{
case EXACT:
if (prefix != null)
_exactMap.remove(prefix);
break;
case PREFIX_GLOB:
if (prefix != null)
_prefixMap.remove(prefix);
break;
case SUFFIX_GLOB:
if (suffix != null)
_suffixMap.remove(suffix);
break;
default:
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());
}
}