org.springframework.http.converter

Class ResourceRegionHttpMessageConverter

java.lang.Object

org.springframework.http.converter.AbstractHttpMessageConverter<T>

org.springframework.http.converter.AbstractGenericHttpMessageConverter<Object>

org.springframework.http.converter.ResourceRegionHttpMessageConverter

All Implemented Interfaces:

GenericHttpMessageConverter<Object>, HttpMessageConverter<Object>

public class ResourceRegionHttpMessageConverter
extends AbstractGenericHttpMessageConverter<Object>

Implementation of HttpMessageConverter that can write a single ResourceRegion or Collections of ResourceRegions.

Since:

4.3

Author:

Brian Clozel, Juergen Hoeller

Field Summary

Fields inherited from class org.springframework.http.converter.AbstractHttpMessageConverter

logger

Constructor Summary

Constructors

Constructor and Description
ResourceRegionHttpMessageConverter()

Method Summary

Modifier and Type	Method and Description
boolean	canRead(Class<?> clazz, MediaType mediaType) This implementation checks if the given class is supported, and if the supported media types include the given media type.
boolean	canRead(Type type, Class<?> contextClass, MediaType mediaType) Indicates whether the given type can be read by this converter.
boolean	canWrite(Class<?> clazz, MediaType mediaType) This implementation checks if the given class is supported, and if the supported media types include the given media type.
boolean	canWrite(Type type, Class<?> clazz, MediaType mediaType) Indicates whether the given class can be written by this converter.
protected MediaType	getDefaultContentType(Object object) Returns the default content type for the given type.
Object	read(Type type, Class<?> contextClass, HttpInputMessage inputMessage) Read an object of the given type form the given input message, and returns it.
protected ResourceRegion	readInternal(Class<?> clazz, HttpInputMessage inputMessage) Abstract template method that reads the actual object.
protected void	writeInternal(Object object, Type type, HttpOutputMessage outputMessage) Abstract template method that writes the actual body.
protected void	writeResourceRegion(ResourceRegion region, HttpOutputMessage outputMessage)

Methods inherited from class org.springframework.http.converter.AbstractGenericHttpMessageConverter

supports, write, writeInternal

Methods inherited from class org.springframework.http.converter.AbstractHttpMessageConverter

addDefaultHeaders, canRead, canWrite, getContentLength, getDefaultCharset, getSupportedMediaTypes, read, setDefaultCharset, setSupportedMediaTypes, write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.http.converter.HttpMessageConverter

getSupportedMediaTypes, getSupportedMediaTypes, read, write

Constructor Detail

ResourceRegionHttpMessageConverter

public ResourceRegionHttpMessageConverter()

Method Detail

canRead

public boolean canRead(Class<?> clazz,
                       @Nullable
                       MediaType mediaType)

Description copied from class: AbstractHttpMessageConverter

This implementation checks if the given class is supported, and if the supported media types include the given media type.

Specified by:

canRead in interface HttpMessageConverter<Object>

Overrides:

canRead in class AbstractHttpMessageConverter<Object>

Parameters:

clazz - the class to test for readability

mediaType - the media type to read (can be null if not specified); typically the value of a Content-Type header.

Returns:

true if readable; false otherwise

canRead

public boolean canRead(Type type,
                       @Nullable
                       Class<?> contextClass,
                       @Nullable
                       MediaType mediaType)

Description copied from interface: GenericHttpMessageConverter

Indicates whether the given type can be read by this converter. This method should perform the same checks as HttpMessageConverter.canRead(Class, MediaType) with additional ones related to the generic type.

Specified by:

canRead in interface GenericHttpMessageConverter<Object>

Overrides:

canRead in class AbstractGenericHttpMessageConverter<Object>

Parameters:

type - the (potentially generic) type to test for readability

contextClass - a context class for the target type, for example a class in which the target type appears in a method signature (can be null)

mediaType - the media type to read, can be null if not specified. Typically, the value of a Content-Type header.

Returns:

true if readable; false otherwise

read

public Object read(Type type,
                   @Nullable
                   Class<?> contextClass,
                   HttpInputMessage inputMessage)
            throws IOException,
                   HttpMessageNotReadableException

Description copied from interface: GenericHttpMessageConverter

Read an object of the given type form the given input message, and returns it.

Parameters:

type - the (potentially generic) type of object to return. This type must have previously been passed to the canRead method of this interface, which must have returned true.

contextClass - a context class for the target type, for example a class in which the target type appears in a method signature (can be null)

inputMessage - the HTTP input message to read from

Returns:

the converted object

Throws:

IOException - in case of I/O errors

HttpMessageNotReadableException - in case of conversion errors

readInternal

protected ResourceRegion readInternal(Class<?> clazz,
                                      HttpInputMessage inputMessage)
                               throws IOException,
                                      HttpMessageNotReadableException

Description copied from class: AbstractHttpMessageConverter

Abstract template method that reads the actual object. Invoked from AbstractHttpMessageConverter.read(java.lang.Class<? extends T>, org.springframework.http.HttpInputMessage).

Specified by:

readInternal in class AbstractHttpMessageConverter<Object>

Parameters:

clazz - the type of object to return

inputMessage - the HTTP input message to read from

Returns:

the converted object

Throws:

IOException - in case of I/O errors

HttpMessageNotReadableException - in case of conversion errors

canWrite

public boolean canWrite(Class<?> clazz,
                        @Nullable
                        MediaType mediaType)

Description copied from class: AbstractHttpMessageConverter

This implementation checks if the given class is supported, and if the supported media types include the given media type.

Specified by:

canWrite in interface HttpMessageConverter<Object>

Overrides:

canWrite in class AbstractHttpMessageConverter<Object>

Parameters:

clazz - the class to test for writability

mediaType - the media type to write (can be null if not specified); typically the value of an Accept header.

Returns:

true if writable; false otherwise

canWrite

public boolean canWrite(@Nullable
                        Type type,
                        @Nullable
                        Class<?> clazz,
                        @Nullable
                        MediaType mediaType)

Description copied from interface: GenericHttpMessageConverter

Indicates whether the given class can be written by this converter.

This method should perform the same checks as HttpMessageConverter.canWrite(Class, MediaType) with additional ones related to the generic type.

Specified by:

canWrite in interface GenericHttpMessageConverter<Object>

Overrides:

canWrite in class AbstractGenericHttpMessageConverter<Object>

Parameters:

type - the (potentially generic) type to test for writability (can be null if not specified)

clazz - the source object class to test for writability

mediaType - the media type to write (can be null if not specified); typically the value of an Accept header.

Returns:

true if writable; false otherwise

writeInternal

protected void writeInternal(Object object,
                             @Nullable
                             Type type,
                             HttpOutputMessage outputMessage)
                      throws IOException,
                             HttpMessageNotWritableException

Description copied from class: AbstractGenericHttpMessageConverter

Abstract template method that writes the actual body. Invoked from AbstractGenericHttpMessageConverter.write(T, java.lang.reflect.Type, org.springframework.http.MediaType, org.springframework.http.HttpOutputMessage).

Specified by:

writeInternal in class AbstractGenericHttpMessageConverter<Object>

Parameters:

object - the object to write to the output message

type - the type of object to write (may be null)

outputMessage - the HTTP output message to write to

Throws:

IOException - in case of I/O errors

HttpMessageNotWritableException - in case of conversion errors

getDefaultContentType

protected MediaType getDefaultContentType(Object object)

Description copied from class: AbstractHttpMessageConverter

Returns the default content type for the given type. Called when AbstractHttpMessageConverter.write(T, org.springframework.http.MediaType, org.springframework.http.HttpOutputMessage) is invoked without a specified content type parameter.

By default, this returns the first element of the supportedMediaTypes property, if any. Can be overridden in subclasses.

Overrides:

getDefaultContentType in class AbstractHttpMessageConverter<Object>

Parameters:

object - the type to return the content type for

Returns:

the content type, or null if not known

writeResourceRegion

protected void writeResourceRegion(ResourceRegion region,
                                   HttpOutputMessage outputMessage)
                            throws IOException

Throws:

IOException