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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.rest;
import org.elasticsearch.common.Nullable;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
/**
* Encapsulate multiple handlers for the same path, allowing different handlers for different HTTP verbs.
*/
final class MethodHandlers {
private final String path;
private final Map methodHandlers;
MethodHandlers(String path, RestHandler handler, RestRequest.Method... methods) {
this.path = path;
this.methodHandlers = new HashMap<>(methods.length);
for (RestRequest.Method method : methods) {
methodHandlers.put(method, handler);
}
}
/**
* Add a handler for an additional array of methods. Note that {@code MethodHandlers}
* does not allow replacing the handler for an already existing method.
*/
MethodHandlers addMethods(RestHandler handler, RestRequest.Method... methods) {
for (RestRequest.Method method : methods) {
RestHandler existing = methodHandlers.putIfAbsent(method, handler);
if (existing != null) {
throw new IllegalArgumentException("Cannot replace existing handler for [" + path + "] for method: " + method);
}
}
return this;
}
/**
* Returns the handler for the given method or {@code null} if none exists.
*/
@Nullable
RestHandler getHandler(RestRequest.Method method) {
return methodHandlers.get(method);
}
/**
* Return a set of all valid HTTP methods for the particular path
*/
Set getValidMethods() {
return methodHandlers.keySet();
}
}