/*
* Copyright 2002-2014 the original author or authors.
*
* Licensed 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.springframework.web.client;
import java.net.URI;
import java.util.Map;
import java.util.Set;
import org.springframework.core.ParameterizedTypeReference;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.ResponseEntity;
/**
* Interface specifying a basic set of RESTful operations. Implemented by {@link RestTemplate}.
* Not often used directly, but a useful option to enhance testability, as it can easily
* be mocked or stubbed.
*
* @author Arjen Poutsma
* @author Juergen Hoeller
* @since 1.0
* @see RestTemplate
*/
public interface RestOperations {
// GET
/**
* Retrieve a representation by doing a GET on the specified URL.
* The response (if any) is converted and returned.
* <p>URI Template variables are expanded using the given URI variables, if any.
* @param url the URL
* @param responseType the type of the return value
* @param uriVariables the variables to expand the template
* @return the converted object
*/
<T> T getForObject(String url, Class<T> responseType, Object... uriVariables) throws RestClientException;
/**
* Retrieve a representation by doing a GET on the URI template.
* The response (if any) is converted and returned.
* <p>URI Template variables are expanded using the given map.
* @param url the URL
* @param responseType the type of the return value
* @param uriVariables the map containing variables for the URI template
* @return the converted object
*/
<T> T getForObject(String url, Class<T> responseType, Map<String, ?> uriVariables) throws RestClientException;
/**
* Retrieve a representation by doing a GET on the URL .
* The response (if any) is converted and returned.
* @param url the URL
* @param responseType the type of the return value
* @return the converted object
*/
<T> T getForObject(URI url, Class<T> responseType) throws RestClientException;
/**
* Retrieve an entity by doing a GET on the specified URL.
* The response is converted and stored in an {@link ResponseEntity}.
* <p>URI Template variables are expanded using the given URI variables, if any.
* @param url the URL
* @param responseType the type of the return value
* @param uriVariables the variables to expand the template
* @return the entity
*/
<T> ResponseEntity<T> getForEntity(String url, Class<T> responseType, Object... uriVariables) throws RestClientException;
/**
* Retrieve a representation by doing a GET on the URI template.
* The response is converted and stored in an {@link ResponseEntity}.
* <p>URI Template variables are expanded using the given map.
* @param url the URL
* @param responseType the type of the return value
* @param uriVariables the map containing variables for the URI template
* @return the converted object
*/
<T> ResponseEntity<T> getForEntity(String url, Class<T> responseType, Map<String, ?> uriVariables) throws RestClientException;
/**
* Retrieve a representation by doing a GET on the URL .
* The response is converted and stored in an {@link ResponseEntity}.
* @param url the URL
* @param responseType the type of the return value
* @return the converted object
*/
<T> ResponseEntity<T> getForEntity(URI url, Class<T> responseType) throws RestClientException;
// HEAD
/**
* Retrieve all headers of the resource specified by the URI template.
* <p>URI Template variables are expanded using the given URI variables, if any.
* @param url the URL
* @param uriVariables the variables to expand the template
* @return all HTTP headers of that resource
*/
HttpHeaders headForHeaders(String url, Object... uriVariables) throws RestClientException;
/**
* Retrieve all headers of the resource specified by the URI template.
* <p>URI Template variables are expanded using the given map.
* @param url the URL
* @param uriVariables the map containing variables for the URI template
* @return all HTTP headers of that resource
*/
HttpHeaders headForHeaders(String url, Map<String, ?> uriVariables) throws RestClientException;
/**
* Retrieve all headers of the resource specified by the URL.
* @param url the URL
* @return all HTTP headers of that resource
*/
HttpHeaders headForHeaders(URI url) throws RestClientException;
// POST
/**
* Create a new resource by POSTing the given object to the URI template, and returns the value of the
* {@code Location} header. This header typically indicates where the new resource is stored.
* <p>URI Template variables are expanded using the given URI variables, if any.
* <p>The {@code request} parameter can be a {@link HttpEntity} in order to
* add additional HTTP headers to the request.
* @param url the URL
* @param request the Object to be POSTed, may be {@code null}
* @param uriVariables the variables to expand the template
* @return the value for the {@code Location} header
* @see HttpEntity
*/
URI postForLocation(String url, Object request, Object... uriVariables) throws RestClientException;
/**
* Create a new resource by POSTing the given object to the URI template, and returns the value of the
* {@code Location} header. This header typically indicates where the new resource is stored.
* <p>URI Template variables are expanded using the given map.
* <p>The {@code request} parameter can be a {@link HttpEntity} in order to
* add additional HTTP headers to the request.
* @param url the URL
* @param request the Object to be POSTed, may be {@code null}
* @param uriVariables the variables to expand the template
* @return the value for the {@code Location} header
* @see HttpEntity
*/
URI postForLocation(String url, Object request, Map<String, ?> uriVariables) throws RestClientException;
/**
* Create a new resource by POSTing the given object to the URL, and returns the value of the
* {@code Location} header. This header typically indicates where the new resource is stored.
* <p>The {@code request} parameter can be a {@link HttpEntity} in order to
* add additional HTTP headers to the request.
* @param url the URL
* @param request the Object to be POSTed, may be {@code null}
* @return the value for the {@code Location} header
* @see HttpEntity
*/
URI postForLocation(URI url, Object request) throws RestClientException;
/**
* Create a new resource by POSTing the given object to the URI template,
* and returns the representation found in the response.
* <p>URI Template variables are expanded using the given URI variables, if any.
* <p>The {@code request} parameter can be a {@link HttpEntity} in order to
* add additional HTTP headers to the request.
* @param url the URL
* @param request the Object to be POSTed, may be {@code null}
* @param responseType the type of the return value
* @param uriVariables the variables to expand the template
* @return the converted object
* @see HttpEntity
*/
<T> T postForObject(String url, Object request, Class<T> responseType, Object... uriVariables)
throws RestClientException;
/**
* Create a new resource by POSTing the given object to the URI template,
* and returns the representation found in the response.
* <p>URI Template variables are expanded using the given map.
* <p>The {@code request} parameter can be a {@link HttpEntity} in order to
* add additional HTTP headers to the request.
* @param url the URL
* @param request the Object to be POSTed, may be {@code null}
* @param responseType the type of the return value
* @param uriVariables the variables to expand the template
* @return the converted object
* @see HttpEntity
*/
<T> T postForObject(String url, Object request, Class<T> responseType, Map<String, ?> uriVariables)
throws RestClientException;
/**
* Create a new resource by POSTing the given object to the URL,
* and returns the representation found in the response.
* <p>The {@code request} parameter can be a {@link HttpEntity} in order to
* add additional HTTP headers to the request.
* @param url the URL
* @param request the Object to be POSTed, may be {@code null}
* @param responseType the type of the return value
* @return the converted object
* @see HttpEntity
*/
<T> T postForObject(URI url, Object request, Class<T> responseType) throws RestClientException;
/**
* Create a new resource by POSTing the given object to the URI template,
* and returns the response as {@link ResponseEntity}.
* <p>URI Template variables are expanded using the given URI variables, if any.
* <p>The {@code request} parameter can be a {@link HttpEntity} in order to
* add additional HTTP headers to the request.
* @param url the URL
* @param request the Object to be POSTed, may be {@code null}
* @param uriVariables the variables to expand the template
* @return the converted object
* @see HttpEntity
*/
<T> ResponseEntity<T> postForEntity(String url, Object request, Class<T> responseType, Object... uriVariables)
throws RestClientException;
/**
* Create a new resource by POSTing the given object to the URI template,
* and returns the response as {@link HttpEntity}.
* <p>URI Template variables are expanded using the given map.
* <p>The {@code request} parameter can be a {@link HttpEntity} in order to
* add additional HTTP headers to the request.
* @param url the URL
* @param request the Object to be POSTed, may be {@code null}
* @param uriVariables the variables to expand the template
* @return the converted object
* @see HttpEntity
*/
<T> ResponseEntity<T> postForEntity(String url, Object request, Class<T> responseType, Map<String, ?> uriVariables)
throws RestClientException;
/**
* Create a new resource by POSTing the given object to the URL,
* and returns the response as {@link ResponseEntity}.
* <p>The {@code request} parameter can be a {@link HttpEntity} in order to
* add additional HTTP headers to the request.
* @param url the URL
* @param request the Object to be POSTed, may be {@code null}
* @return the converted object
* @see HttpEntity
*/
<T> ResponseEntity<T> postForEntity(URI url, Object request, Class<T> responseType) throws RestClientException;
// PUT
/**
* Create or update a resource by PUTting the given object to the URI.
* <p>URI Template variables are expanded using the given URI variables, if any.
* <p>The {@code request} parameter can be a {@link HttpEntity} in order to
* add additional HTTP headers to the request.
* @param url the URL
* @param request the Object to be PUT, may be {@code null}
* @param uriVariables the variables to expand the template
* @see HttpEntity
*/
void put(String url, Object request, Object... uriVariables) throws RestClientException;
/**
* Creates a new resource by PUTting the given object to URI template.
* <p>URI Template variables are expanded using the given map.
* <p>The {@code request} parameter can be a {@link HttpEntity} in order to
* add additional HTTP headers to the request.
* @param url the URL
* @param request the Object to be PUT, may be {@code null}
* @param uriVariables the variables to expand the template
* @see HttpEntity
*/
void put(String url, Object request, Map<String, ?> uriVariables) throws RestClientException;
/**
* Creates a new resource by PUTting the given object to URL.
* <p>The {@code request} parameter can be a {@link HttpEntity} in order to
* add additional HTTP headers to the request.
* @param url the URL
* @param request the Object to be PUT, may be {@code null}
* @see HttpEntity
*/
void put(URI url, Object request) throws RestClientException;
// DELETE
/**
* Delete the resources at the specified URI.
* <p>URI Template variables are expanded using the given URI variables, if any.
* @param url the URL
* @param uriVariables the variables to expand in the template
*/
void delete(String url, Object... uriVariables) throws RestClientException;
/**
* Delete the resources at the specified URI.
* <p>URI Template variables are expanded using the given map.
*
* @param url the URL
* @param uriVariables the variables to expand the template
*/
void delete(String url, Map<String, ?> uriVariables) throws RestClientException;
/**
* Delete the resources at the specified URL.
* @param url the URL
*/
void delete(URI url) throws RestClientException;
// OPTIONS
/**
* Return the value of the Allow header for the given URI.
* <p>URI Template variables are expanded using the given URI variables, if any.
* @param url the URL
* @param uriVariables the variables to expand in the template
* @return the value of the allow header
*/
Set<HttpMethod> optionsForAllow(String url, Object... uriVariables) throws RestClientException;
/**
* Return the value of the Allow header for the given URI.
* <p>URI Template variables are expanded using the given map.
* @param url the URL
* @param uriVariables the variables to expand in the template
* @return the value of the allow header
*/
Set<HttpMethod> optionsForAllow(String url, Map<String, ?> uriVariables) throws RestClientException;
/**
* Return the value of the Allow header for the given URL.
* @param url the URL
* @return the value of the allow header
*/
Set<HttpMethod> optionsForAllow(URI url) throws RestClientException;
// exchange
/**
* Execute the HTTP method to the given URI template, writing the given request entity to the request, and
* returns the response as {@link ResponseEntity}.
* <p>URI Template variables are expanded using the given URI variables, if any.
* @param url the URL
* @param method the HTTP method (GET, POST, etc)
* @param requestEntity the entity (headers and/or body) to write to the request, may be {@code null}
* @param responseType the type of the return value
* @param uriVariables the variables to expand in the template
* @return the response as entity
*/
<T> ResponseEntity<T> exchange(String url, HttpMethod method, HttpEntity<?> requestEntity,
Class<T> responseType, Object... uriVariables) throws RestClientException;
/**
* Execute the HTTP method to the given URI template, writing the given request entity to the request, and
* returns the response as {@link ResponseEntity}.
* <p>URI Template variables are expanded using the given URI variables, if any.
* @param url the URL
* @param method the HTTP method (GET, POST, etc)
* @param requestEntity the entity (headers and/or body) to write to the request, may be {@code null}
* @param responseType the type of the return value
* @param uriVariables the variables to expand in the template
* @return the response as entity
*/
<T> ResponseEntity<T> exchange(String url, HttpMethod method, HttpEntity<?> requestEntity,
Class<T> responseType, Map<String, ?> uriVariables) throws RestClientException;
/**
* Execute the HTTP method to the given URI template, writing the given request entity to the request, and
* returns the response as {@link ResponseEntity}.
* @param url the URL
* @param method the HTTP method (GET, POST, etc)
* @param requestEntity the entity (headers and/or body) to write to the request, may be {@code null}
* @param responseType the type of the return value
* @return the response as entity
*/
<T> ResponseEntity<T> exchange(URI url, HttpMethod method, HttpEntity<?> requestEntity,
Class<T> responseType) throws RestClientException;
/**
* Execute the HTTP method to the given URI template, writing the given
* request entity to the request, and returns the response as {@link ResponseEntity}.
* The given {@link ParameterizedTypeReference} is used to pass generic type information:
* <pre class="code">
* ParameterizedTypeReference<List<MyBean>> myBean = new ParameterizedTypeReference<List<MyBean>>() {};
* ResponseEntity<List<MyBean>> response = template.exchange("http://example.com",HttpMethod.GET, null, myBean);
* </pre>
* @param url the URL
* @param method the HTTP method (GET, POST, etc)
* @param requestEntity the entity (headers and/or body) to write to the
* request, may be {@code null}
* @param responseType the type of the return value
* @param uriVariables the variables to expand in the template
* @return the response as entity
* @since 2.0
*/
<T> ResponseEntity<T> exchange(String url,HttpMethod method, HttpEntity<?> requestEntity,
ParameterizedTypeReference<T> responseType, Object... uriVariables) throws RestClientException;
/**
* Execute the HTTP method to the given URI template, writing the given
* request entity to the request, and returns the response as {@link ResponseEntity}.
* The given {@link ParameterizedTypeReference} is used to pass generic type information:
* <pre class="code">
* ParameterizedTypeReference<List<MyBean>> myBean = new ParameterizedTypeReference<List<MyBean>>() {};
* ResponseEntity<List<MyBean>> response = template.exchange("http://example.com",HttpMethod.GET, null, myBean);
* </pre>
* @param url the URL
* @param method the HTTP method (GET, POST, etc)
* @param requestEntity the entity (headers and/or body) to write to the request, may be {@code null}
* @param responseType the type of the return value
* @param uriVariables the variables to expand in the template
* @return the response as entity
* @since 2.0
*/
<T> ResponseEntity<T> exchange(String url, HttpMethod method, HttpEntity<?> requestEntity,
ParameterizedTypeReference<T> responseType, Map<String, ?> uriVariables) throws RestClientException;
/**
* Execute the HTTP method to the given URI template, writing the given
* request entity to the request, and returns the response as {@link ResponseEntity}.
* The given {@link ParameterizedTypeReference} is used to pass generic type information:
* <pre class="code">
* ParameterizedTypeReference<List<MyBean>> myBean = new ParameterizedTypeReference<List<MyBean>>() {};
* ResponseEntity<List<MyBean>> response = template.exchange("http://example.com",HttpMethod.GET, null, myBean);
* </pre>
* @param url the URL
* @param method the HTTP method (GET, POST, etc)
* @param requestEntity the entity (headers and/or body) to write to the request, may be {@code null}
* @param responseType the type of the return value
* @return the response as entity
* @since 2.0
*/
<T> ResponseEntity<T> exchange(URI url, HttpMethod method, HttpEntity<?> requestEntity,
ParameterizedTypeReference<T> responseType) throws RestClientException;
// general execution
/**
* Execute the HTTP method to the given URI template, preparing the request with the
* {@link RequestCallback}, and reading the response with a {@link ResponseExtractor}.
* <p>URI Template variables are expanded using the given URI variables, if any.
* @param url the URL
* @param method the HTTP method (GET, POST, etc)
* @param requestCallback object that prepares the request
* @param responseExtractor object that extracts the return value from the response
* @param uriVariables the variables to expand in the template
* @return an arbitrary object, as returned by the {@link ResponseExtractor}
*/
<T> T execute(String url, HttpMethod method, RequestCallback requestCallback,
ResponseExtractor<T> responseExtractor, Object... uriVariables) throws RestClientException;
/**
* Execute the HTTP method to the given URI template, preparing the request with the
* {@link RequestCallback}, and reading the response with a {@link ResponseExtractor}.
* <p>URI Template variables are expanded using the given URI variables map.
* @param url the URL
* @param method the HTTP method (GET, POST, etc)
* @param requestCallback object that prepares the request
* @param responseExtractor object that extracts the return value from the response
* @param uriVariables the variables to expand in the template
* @return an arbitrary object, as returned by the {@link ResponseExtractor}
*/
<T> T execute(String url, HttpMethod method, RequestCallback requestCallback,
ResponseExtractor<T> responseExtractor, Map<String, ?> uriVariables) throws RestClientException;
/**
* Execute the HTTP method to the given URL, preparing the request with the
* {@link RequestCallback}, and reading the response with a {@link ResponseExtractor}.
* @param url the URL
* @param method the HTTP method (GET, POST, etc)
* @param requestCallback object that prepares the request
* @param responseExtractor object that extracts the return value from the response
* @return an arbitrary object, as returned by the {@link ResponseExtractor}
*/
<T> T execute(URI url, HttpMethod method, RequestCallback requestCallback,
ResponseExtractor<T> responseExtractor) throws RestClientException;
}