/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.clerezza.triaxrs;
import java.util.Iterator;
import java.util.SortedSet;
import java.util.TreeSet;
import org.apache.clerezza.triaxrs.util.PathMatching;
import org.apache.clerezza.triaxrs.util.TemplateEncoder;
import org.apache.clerezza.utils.UriException;
import org.apache.clerezza.utils.UriUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.wymiwyg.wrhapi.HandlerException;
/**
* Manages a set of root-resources delivering a suitable root-resource given a
* path.
*
* @author reto
*/
public class RootResources {
/**
* @author mir
*
*/
public static class ResourceAndPathMatching {
private Object rootResource;
private PathMatching pathMatching;
public ResourceAndPathMatching(Object rootResource,
PathMatching pathMatching) {
this.rootResource = rootResource;
this.pathMatching = pathMatching;
}
public Object getRootResource() {
return rootResource;
}
public PathMatching getPathMatching() {
return pathMatching;
}
}
private static ThreadLocal<String> requestUri = new ThreadLocal<String>() {
};
public static String getCurrentRequestUri() {
return requestUri.get();
}
final static private Logger logger = LoggerFactory
.getLogger(RootResources.class);
/**
* we store the resource descriptors
*/
SortedSet<RootResourceDescriptor> rootResourceDescriptors = new TreeSet<RootResourceDescriptor>();
/**
* adds a {@link RootResourceDescriptor}
*
* @param descriptor
*/
public void add(RootResourceDescriptor descriptor) {
// TODO Flag an error if the set includes more than one instance
// of the same class.
rootResourceDescriptors.add(descriptor);
}
/**
* removes a {@link RootResourceDescriptor}
*
* @param descriptor
*/
public void remove(RootResourceDescriptor descriptor) {
rootResourceDescriptors.remove(descriptor);
}
/**
*
* @return the number of available root resources
*/
public int size() {
return rootResourceDescriptors.size();
}
/**
* Get the best matching root-resource for a path
*
* @param uriPath
* @return the matching root-resource or null if no root resources matches
*/
public RootResourceDescriptor getDescriptor(String uriPath) {
for (RootResourceDescriptor descriptor : rootResourceDescriptors) {
PathMatching pathMatching = descriptor.getUriTemplate().match(
uriPath);
if (pathMatching != null) {
return descriptor;
}
}
return null;
}
ResourceAndPathMatching getResourceAndPathMatching(WebRequest request)
throws HandlerException, NoMatchingRootResourceException {
String uriPath;
try {
uriPath = UriUtil.encodePartlyEncodedPath(request.getWrhapiRequest().getRequestURI().getPath(), "UTF-8");
} catch (UriException ex) {
throw new RuntimeException(ex);
}
requestUri.set(uriPath);
PathMatching pathMatching = null;
RootResourceDescriptor descriptor = null;
Iterator<RootResourceDescriptor> descriptorIter = rootResourceDescriptors
.iterator();
while (descriptorIter.hasNext()) {
descriptor = descriptorIter.next();
pathMatching = descriptor.getUriTemplate().match(uriPath);
if (pathMatching != null) {
break;
}
}
if (pathMatching == null) {
throw new NoMatchingRootResourceException();
}
return new ResourceAndPathMatching(descriptor.getInstance(request,
pathMatching.getParameters()), pathMatching);
}
}