## org.springframework.web.client
Interface RestOperations

All Known Implementing Classes:
  RestTemplate

    public interface RestOperations

Interface specifying a basic set of RESTful operations. Implemented by `RestTemplate`. Not often used directly, but a useful option to enhance testability, as it can easily be mocked or stubbed.

Since:
  3.0
Author:
  Arjen Poutsma, Juergen Hoeller
See Also:
  `RestTemplate`

Method Summary
`void` `delete(String url, Map<String,?> uriVariables)` Delete the resources at the specified URI.
`void` `delete(String url, Object... uriVariables)` Delete the resources at the specified URI.
`void` `delete(URI url)` Delete the resources at the specified URL.

`

`<T> ResponseEntity<T>`

`

`exchange(String url, HttpMethod method, HttpEntity<?> requestEntity, Class<T> responseType, Map<String,?> uriVariables)`
Execute the HTTP method to the given URI template, writing the given request entity to the request, and returns the response as `ResponseEntity`.

`

`<T> ResponseEntity<T>`

`

`exchange(String url, HttpMethod method, HttpEntity<?> requestEntity, Class<T> responseType, Object... uriVariables)`
Execute the HTTP method to the given URI template, writing the given request entity to the request, and returns the response as `ResponseEntity`.

`

`<T> ResponseEntity<T>`

`

`exchange(URI url, HttpMethod method, HttpEntity<?> requestEntity, Class<T> responseType)`
Execute the HTTP method to the given URI template, writing the given request entity to the request, and returns the response as `ResponseEntity`.

`

`<T> T`

`

`execute(String url, HttpMethod method, RequestCallback requestCallback, ResponseExtractor<T> responseExtractor, Map<String,?> uriVariables)`
Execute the HTTP method to the given URI template, preparing the request with the `RequestCallback`, and reading the response with a `ResponseExtractor`.

`

`<T> T`

`

`execute(String url, HttpMethod method, RequestCallback requestCallback, ResponseExtractor<T> responseExtractor, Object... uriVariables)`
Execute the HTTP method to the given URI template, preparing the request with the `RequestCallback`, and reading the response with a `ResponseExtractor`.

`

`<T> T`

`

`execute(URI url, HttpMethod method, RequestCallback requestCallback, ResponseExtractor<T> responseExtractor)`
Execute the HTTP method to the given URL, preparing the request with the `RequestCallback`, and reading the response with a `ResponseExtractor`.

`

`<T> ResponseEntity<T>`

`

`getForEntity(String url, Class<T> responseType, Map<String,?> uriVariables)`
Retrieve a representation by doing a GET on the URI template.

`

`<T> ResponseEntity<T>`

`

`getForEntity(String url, Class<T> responseType, Object... uriVariables)`
Retrieve an entity by doing a GET on the specified URL.

`

`<T> ResponseEntity<T>`

`

`getForEntity(URI url, Class<T> responseType)`
Retrieve a representation by doing a GET on the URL .

`

`<T> T`

`

`getForObject(String url, Class<T> responseType, Map<String,?> uriVariables)`
Retrieve a representation by doing a GET on the URI template.

`

`<T> T`

`

`getForObject(String url, Class<T> responseType, Object... uriVariables)`
Retrieve a representation by doing a GET on the specified URL.

`

`<T> T`

`

`getForObject(URI url, Class<T> responseType)`
Retrieve a representation by doing a GET on the URL .

`HttpHeaders` `headForHeaders(String url, Map<String,?> uriVariables)` Retrieve all headers of the resource specified by the URI template.
`HttpHeaders` `headForHeaders(String url, Object... uriVariables)` Retrieve all headers of the resource specified by the URI template.
`HttpHeaders` `headForHeaders(URI url)` Retrieve all headers of the resource specified by the URL.
`Set<HttpMethod>` `optionsForAllow(String url, Map<String,?> uriVariables)` Return the value of the Allow header for the given URI.
`Set<HttpMethod>` `optionsForAllow(String url, Object... uriVariables)` Return the value of the Allow header for the given URI.
`Set<HttpMethod>` `optionsForAllow(URI url)` Return the value of the Allow header for the given URL.

`

`<T> ResponseEntity<T>`

`

`postForEntity(String url, Object request, Class<T> responseType, Map<String,?> uriVariables)`
Create a new resource by POSTing the given object to the URI template, and returns the response as `HttpEntity`.

`

`<T> ResponseEntity<T>`

`

`postForEntity(String url, Object request, Class<T> responseType, Object... uriVariables)`
Create a new resource by POSTing the given object to the URI template, and returns the response as `ResponseEntity`.

`

`<T> ResponseEntity<T>`

`

`postForEntity(URI url, Object request, Class<T> responseType)`
Create a new resource by POSTing the given object to the URL, and returns the response as `ResponseEntity`.

`URI` `postForLocation(String url, Object request, Map<String,?> uriVariables)` Create a new resource by POSTing the given object to the URI template, and returns the value of the `Location` header.
`URI` `postForLocation(String url, Object request, Object... uriVariables)` Create a new resource by POSTing the given object to the URI template, and returns the value of the `Location` header.
`URI` `postForLocation(URI url, Object request)` Create a new resource by POSTing the given object to the URL, and returns the value of the `Location` header.

`

`<T> T`

`

`postForObject(String url, Object request, Class<T> responseType, Map<String,?> uriVariables)`
Create a new resource by POSTing the given object to the URI template, and returns the representation found in the response.

`

`<T> T`

`

`postForObject(String url, Object request, Class<T> responseType, Object... uriVariables)`
Create a new resource by POSTing the given object to the URI template, and returns the representation found in the response.

`

`<T> T`

`

`postForObject(URI url, Object request, Class<T> responseType)`
Create a new resource by POSTing the given object to the URL, and returns the representation found in the response.

`void` `put(String url, Object request, Map<String,?> uriVariables)` Creates a new resource by PUTting the given object to URI template.
`void` `put(String url, Object request, Object... uriVariables)` Create or update a resource by PUTting the given object to the URI.
`void` `put(URI url, Object request)` Creates a new resource by PUTting the given object to URL.

Method Detail

### getForObject

    <T> T getForObject(String url,
                       Class<T> responseType,
                       Object... uriVariables)
                   throws RestClientException

  Retrieve a representation by doing a GET on the specified URL. The response (if any) is converted and returned.

  URI Template variables are expanded using the given URI variables, if any.

  Parameters:
    `url` - the URL
    `responseType` - the type of the return value
    `uriVariables` - the variables to expand the template
  Returns:
    the converted object
  Throws:
    `RestClientException`

### getForObject

    <T> T getForObject(String url,
                       Class<T> responseType,
                       Map<String,?> uriVariables)
                   throws RestClientException

  Retrieve a representation by doing a GET on the URI template. The response (if any) is converted and returned.

  URI Template variables are expanded using the given map.

  Parameters:
    `url` - the URL
    `responseType` - the type of the return value
    `uriVariables` - the map containing variables for the URI template
  Returns:
    the converted object
  Throws:
    `RestClientException`

### getForObject

    <T> T getForObject(URI url,
                       Class<T> responseType)
                   throws RestClientException

  Retrieve a representation by doing a GET on the URL . The response (if any) is converted and returned.

  Parameters:
    `url` - the URL
    `responseType` - the type of the return value
  Returns:
    the converted object
  Throws:
    `RestClientException`

### getForEntity

    <T> ResponseEntity<T> getForEntity(String url,
                                       Class<T> responseType,
                                       Object... uriVariables)
                                   throws RestClientException

  Retrieve an entity by doing a GET on the specified URL. The response is converted and stored in an `ResponseEntity`.

  URI Template variables are expanded using the given URI variables, if any.

  Parameters:
    `url` - the URL
    `responseType` - the type of the return value
    `uriVariables` - the variables to expand the template
  Returns:
    the entity
  Throws:
    `RestClientException`
  Since:
    3.0.2

### getForEntity

    <T> ResponseEntity<T> getForEntity(String url,
                                       Class<T> responseType,
                                       Map<String,?> uriVariables)
                                   throws RestClientException

  Retrieve a representation by doing a GET on the URI template. The response is converted and stored in an `ResponseEntity`.

  URI Template variables are expanded using the given map.

  Parameters:
    `url` - the URL
    `responseType` - the type of the return value
    `uriVariables` - the map containing variables for the URI template
  Returns:
    the converted object
  Throws:
    `RestClientException`
  Since:
    3.0.2

### getForEntity

    <T> ResponseEntity<T> getForEntity(URI url,
                                       Class<T> responseType)
                                   throws RestClientException

  Retrieve a representation by doing a GET on the URL . The response is converted and stored in an `ResponseEntity`.

  Parameters:
    `url` - the URL
    `responseType` - the type of the return value
  Returns:
    the converted object
  Throws:
    `RestClientException`
  Since:
    3.0.2

### headForHeaders

    HttpHeaders headForHeaders(String url,
                               Object... uriVariables)
                               throws RestClientException

  Retrieve all headers of the resource specified by the URI template.

  URI Template variables are expanded using the given URI variables, if any.

  Parameters:
    `url` - the URL
    `uriVariables` - the variables to expand the template
  Returns:
    all HTTP headers of that resource
  Throws:
    `RestClientException`

### headForHeaders

    HttpHeaders headForHeaders(String url,
                               Map<String,?> uriVariables)
                               throws RestClientException

  Retrieve all headers of the resource specified by the URI template.

  URI Template variables are expanded using the given map.

  Parameters:
    `url` - the URL
    `uriVariables` - the map containing variables for the URI template
  Returns:
    all HTTP headers of that resource
  Throws:
    `RestClientException`

### headForHeaders

    HttpHeaders headForHeaders(URI url)
                               throws RestClientException

  Retrieve all headers of the resource specified by the URL.

  Parameters:
    `url` - the URL
  Returns:
    all HTTP headers of that resource
  Throws:
    `RestClientException`

### postForLocation

    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 `Location` header. This header typically indicates where the new resource is stored.

  URI Template variables are expanded using the given URI variables, if any.

  The `request` parameter can be a `HttpEntity` in order to add additional HTTP headers to the request.

  Parameters:
    `url` - the URL
    `request` - the Object to be POSTed, may be `null`
    `uriVariables` - the variables to expand the template
  Returns:
    the value for the `Location` header
  Throws:
    `RestClientException`
  See Also:
    `HttpEntity`

### postForLocation

    URI postForLocation(String url,
                        Object request,
                        Map<String,?> uriVariables)
                        throws RestClientException

  Create a new resource by POSTing the given object to the URI template, and returns the value of the `Location` header. This header typically indicates where the new resource is stored.

  URI Template variables are expanded using the given map.

  The `request` parameter can be a `HttpEntity` in order to add additional HTTP headers to the request.

  Parameters:
    `url` - the URL
    `request` - the Object to be POSTed, may be `null`
    `uriVariables` - the variables to expand the template
  Returns:
    the value for the `Location` header
  Throws:
    `RestClientException`
  See Also:
    `HttpEntity`

### postForLocation

    URI postForLocation(URI url,
                        Object request)
                        throws RestClientException

  Create a new resource by POSTing the given object to the URL, and returns the value of the `Location` header. This header typically indicates where the new resource is stored.

  The `request` parameter can be a `HttpEntity` in order to add additional HTTP headers to the request.

  Parameters:
    `url` - the URL
    `request` - the Object to be POSTed, may be `null`
  Returns:
    the value for the `Location` header
  Throws:
    `RestClientException`
  See Also:
    `HttpEntity`

### postForObject

    <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.

  URI Template variables are expanded using the given URI variables, if any.

  The `request` parameter can be a `HttpEntity` in order to add additional HTTP headers to the request.

  Parameters:
    `url` - the URL
    `request` - the Object to be POSTed, may be `null`
    `responseType` - the type of the return value
    `uriVariables` - the variables to expand the template
  Returns:
    the converted object
  Throws:
    `RestClientException`
  See Also:
    `HttpEntity`

### postForObject

    <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 URI template, and returns the representation found in the response.

  URI Template variables are expanded using the given map.

  The `request` parameter can be a `HttpEntity` in order to add additional HTTP headers to the request.

  Parameters:
    `url` - the URL
    `request` - the Object to be POSTed, may be `null`
    `responseType` - the type of the return value
    `uriVariables` - the variables to expand the template
  Returns:
    the converted object
  Throws:
    `RestClientException`
  See Also:
    `HttpEntity`

### postForObject

    <T> T postForObject(URI url,
                        Object request,
                        Class<T> responseType)
                    throws RestClientException

  Create a new resource by POSTing the given object to the URL, and returns the representation found in the response.

  The `request` parameter can be a `HttpEntity` in order to add additional HTTP headers to the request.

  Parameters:
    `url` - the URL
    `request` - the Object to be POSTed, may be `null`
    `responseType` - the type of the return value
  Returns:
    the converted object
  Throws:
    `RestClientException`
  See Also:
    `HttpEntity`

### postForEntity

    <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 `ResponseEntity`.

  URI Template variables are expanded using the given URI variables, if any.

  The `request` parameter can be a `HttpEntity` in order to add additional HTTP headers to the request.

  Parameters:
    `url` - the URL
    `request` - the Object to be POSTed, may be `null`
    `uriVariables` - the variables to expand the template
  Returns:
    the converted object
  Throws:
    `RestClientException`
  Since:
    3.0.2
  See Also:
    `HttpEntity`

### postForEntity

    <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 URI template, and returns the response as `HttpEntity`.

  URI Template variables are expanded using the given map.

  The `request` parameter can be a `HttpEntity` in order to add additional HTTP headers to the request.

  Parameters:
    `url` - the URL
    `request` - the Object to be POSTed, may be `null`
    `uriVariables` - the variables to expand the template
  Returns:
    the converted object
  Throws:
    `RestClientException`
  Since:
    3.0.2
  See Also:
    `HttpEntity`

### postForEntity

    <T> ResponseEntity<T> postForEntity(URI url,
                                        Object request,
                                        Class<T> responseType)
                                    throws RestClientException

  Create a new resource by POSTing the given object to the URL, and returns the response as `ResponseEntity`.

  The `request` parameter can be a `HttpEntity` in order to add additional HTTP headers to the request.

  Parameters:
    `url` - the URL
    `request` - the Object to be POSTed, may be `null`
  Returns:
    the converted object
  Throws:
    `RestClientException`
  Since:
    3.0.2
  See Also:
    `HttpEntity`

### put

    void put(String url,
             Object request,
             Object... uriVariables)
             throws RestClientException

  Create or update a resource by PUTting the given object to the URI.

  URI Template variables are expanded using the given URI variables, if any.

  The `request` parameter can be a `HttpEntity` in order to add additional HTTP headers to the request.

  Parameters:
    `url` - the URL
    `request` - the Object to be PUT, may be `null`
    `uriVariables` - the variables to expand the template
  Throws:
    `RestClientException`
  See Also:
    `HttpEntity`

### put

    void put(String url,
             Object request,
             Map<String,?> uriVariables)
             throws RestClientException

  Creates a new resource by PUTting the given object to URI template.

  URI Template variables are expanded using the given map.

  The `request` parameter can be a `HttpEntity` in order to add additional HTTP headers to the request.

  Parameters:
    `url` - the URL
    `request` - the Object to be PUT, may be `null`
    `uriVariables` - the variables to expand the template
  Throws:
    `RestClientException`
  See Also:
    `HttpEntity`

### put

    void put(URI url,
             Object request)
             throws RestClientException

  Creates a new resource by PUTting the given object to URL.

  The `request` parameter can be a `HttpEntity` in order to add additional HTTP headers to the request.

  Parameters:
    `url` - the URL
    `request` - the Object to be PUT, may be `null`
  Throws:
    `RestClientException`
  See Also:
    `HttpEntity`

### delete

    void delete(String url,
                Object... uriVariables)
                throws RestClientException

  Delete the resources at the specified URI.

  URI Template variables are expanded using the given URI variables, if any.

  Parameters:
    `url` - the URL
    `uriVariables` - the variables to expand in the template
  Throws:
    `RestClientException`

### delete

    void delete(String url,
                Map<String,?> uriVariables)
                throws RestClientException

  Delete the resources at the specified URI.

  URI Template variables are expanded using the given map.

  Parameters:
    `url` - the URL
    `uriVariables` - the variables to expand the template
  Throws:
    `RestClientException`

### delete

    void delete(URI url)
                throws RestClientException

  Delete the resources at the specified URL.

  Parameters:
    `url` - the URL
  Throws:
    `RestClientException`

### optionsForAllow

    Set<HttpMethod> optionsForAllow(String url,
                                    Object... uriVariables)
                                    throws RestClientException

  Return the value of the Allow header for the given URI.

  URI Template variables are expanded using the given URI variables, if any.

  Parameters:
    `url` - the URL
    `uriVariables` - the variables to expand in the template
  Returns:
    the value of the allow header
  Throws:
    `RestClientException`

### optionsForAllow

    Set<HttpMethod> optionsForAllow(String url,
                                    Map<String,?> uriVariables)
                                    throws RestClientException

  Return the value of the Allow header for the given URI.

  URI Template variables are expanded using the given map.

  Parameters:
    `url` - the URL
    `uriVariables` - the variables to expand in the template
  Returns:
    the value of the allow header
  Throws:
    `RestClientException`

### optionsForAllow

    Set<HttpMethod> optionsForAllow(URI url)
                                    throws RestClientException

  Return the value of the Allow header for the given URL.

  Parameters:
    `url` - the URL
  Returns:
    the value of the allow header
  Throws:
    `RestClientException`

### exchange

    <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 `ResponseEntity`.

  URI Template variables are expanded using the given URI variables, if any.

  Parameters:
    `url` - the URL
    `method` - the HTTP method (GET, POST, etc)
    `requestEntity` - the entity (headers and/or body) to write to the request, may be `null`
    `responseType` - the type of the return value
    `uriVariables` - the variables to expand in the template
  Returns:
    the response as entity
  Throws:
    `RestClientException`
  Since:
    3.0.2

### exchange

    <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 `ResponseEntity`.

  URI Template variables are expanded using the given URI variables, if any.

  Parameters:
    `url` - the URL
    `method` - the HTTP method (GET, POST, etc)
    `requestEntity` - the entity (headers and/or body) to write to the request, may be `null`
    `responseType` - the type of the return value
    `uriVariables` - the variables to expand in the template
  Returns:
    the response as entity
  Throws:
    `RestClientException`
  Since:
    3.0.2

### exchange

    <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 `ResponseEntity`.

  Parameters:
    `url` - the URL
    `method` - the HTTP method (GET, POST, etc)
    `requestEntity` - the entity (headers and/or body) to write to the request, may be `null`
    `responseType` - the type of the return value
  Returns:
    the response as entity
  Throws:
    `RestClientException`
  Since:
    3.0.2

### execute

    <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 `RequestCallback`, and reading the response with a `ResponseExtractor`.

  URI Template variables are expanded using the given URI variables, if any.

  Parameters:
    `url` - the URL
    `method` - the HTTP method (GET, POST, etc)
    `requestCallback` - object that prepares the request
    `responseExtractor` - object that extracts the return value from the response
    `uriVariables` - the variables to expand in the template
  Returns:
    an arbitrary object, as returned by the `ResponseExtractor`
  Throws:
    `RestClientException`

### execute

    <T> T execute(String url,
                  HttpMethod method,
                  RequestCallback requestCallback,
                  ResponseExtractor<T> responseExtractor,
                  Map<String,?> uriVariables)
              throws RestClientException

  Execute the HTTP method to the given URI template, preparing the request with the `RequestCallback`, and reading the response with a `ResponseExtractor`.

  URI Template variables are expanded using the given URI variables map.

  Parameters:
    `url` - the URL
    `method` - the HTTP method (GET, POST, etc)
    `requestCallback` - object that prepares the request
    `responseExtractor` - object that extracts the return value from the response
    `uriVariables` - the variables to expand in the template
  Returns:
    an arbitrary object, as returned by the `ResponseExtractor`
  Throws:
    `RestClientException`

### execute

    <T> T execute(URI url,
                  HttpMethod method,
                  RequestCallback requestCallback,
                  ResponseExtractor<T> responseExtractor)
              throws RestClientException

  Execute the HTTP method to the given URL, preparing the request with the `RequestCallback`, and reading the response with a `ResponseExtractor`.

  Parameters:
    `url` - the URL
    `method` - the HTTP method (GET, POST, etc)
    `requestCallback` - object that prepares the request
    `responseExtractor` - object that extracts the return value from the response
  Returns:
    an arbitrary object, as returned by the `ResponseExtractor`
  Throws:
    `RestClientException`