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EndpointBase.java
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EndpointBase.java
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/*
* Licensed to Elasticsearch B.V. under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch B.V. 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 co.elastic.clients.transport.endpoints;
import co.elastic.clients.elasticsearch._types.ErrorResponse;
import co.elastic.clients.json.JsonpDeserializer;
import co.elastic.clients.transport.Endpoint;
import org.apache.http.client.utils.URLEncodedUtils;
import java.util.Collections;
import java.util.Map;
import java.util.function.Function;
public class EndpointBase<RequestT, ResponseT> implements Endpoint<RequestT, ResponseT, ErrorResponse> {
private static final Function<?, Map<String, String>> EMPTY_MAP = x -> Collections.emptyMap();
/**
* Returns a function that always returns an empty String to String map. Useful to avoid creating lots of
* duplicate lambdas in endpoints that don't have headers or parameters.
*/
@SuppressWarnings("unchecked")
public static <T> Function<T, Map<String, String>> emptyMap() {
return (Function<T, Map<String, String>>) EMPTY_MAP;
}
protected final String id;
protected final Function<RequestT, String> method;
protected final Function<RequestT, String> requestUrl;
protected final Function<RequestT, Map<String, String>> queryParameters;
protected final Function<RequestT, Map<String, String>> headers;
protected final boolean hasRequestBody;
public EndpointBase(
String id,
Function<RequestT, String> method,
Function<RequestT, String> requestUrl,
Function<RequestT, Map<String, String>> queryParameters,
Function<RequestT, Map<String, String>> headers,
boolean hasRequestBody
) {
this.id = id;
this.method = method;
this.requestUrl = requestUrl;
this.queryParameters = queryParameters;
this.headers = headers;
this.hasRequestBody = hasRequestBody;
}
@Override
public String id() {
return this.id;
}
@Override
public String method(RequestT request) {
return this.method.apply(request);
}
@Override
public String requestUrl(RequestT request) {
return this.requestUrl.apply(request);
}
@Override
public Map<String, String> queryParameters(RequestT request) {
return this.queryParameters.apply(request);
}
@Override
public Map<String, String> headers(RequestT request) {
return this.headers.apply(request);
}
@Override
public boolean hasRequestBody() {
return this.hasRequestBody;
}
// ES-specific
@Override
public boolean isError(int statusCode) {
return statusCode >= 400;
}
@Override
public JsonpDeserializer<ErrorResponse> errorDeserializer(int statusCode) {
return ErrorResponse._DESERIALIZER;
}
public <NewResponseT> SimpleEndpoint<RequestT, NewResponseT> withResponseDeserializer(
JsonpDeserializer<NewResponseT> newResponseParser
) {
return new SimpleEndpoint<>(
id,
method,
requestUrl,
queryParameters,
headers,
hasRequestBody,
newResponseParser
);
}
public static RuntimeException noPathTemplateFound(String what) {
return new RuntimeException("Could not find a request " + what + " with this set of properties. " +
"Please check the API documentation, or raise an issue if this should be a valid request.");
}
public static void pathEncode(String src, StringBuilder dest) {
// TODO: avoid dependency on HttpClient here (and use something more efficient)
dest.append(URLEncodedUtils.formatSegments(src).substring(1));
}
}