Package org.apache.wicket.resource

Class FileSystemResourceReference

java.lang.Object

org.apache.wicket.request.resource.ResourceReference

org.apache.wicket.resource.FileSystemResourceReference

All Implemented Interfaces:

Serializable, IClusterable

public class FileSystemResourceReference
extends ResourceReference

This resource reference is used to provide a reference to a resource based on Java NIO FileSystem API.

To implement a mime type detection refer to the documentation of Files.probeContentType(Path) and provide an implementation for java.nio.file.spi.FileTypeDetector in the META-INF/services folder for jars or in the /WEB-INF/classes/META-INF/services folder for webapps

You can optionally override getFileSystemResource() to provide an inline mime type detection, which is preferred to the default detection.

Example:

 
 Path path = FileSystemResourceReference.getPath(URI.create("jar:file:///folder/file.zip!/folderInZip/video.mp4"));
 add(new Video("video", new FileSystemResourceReference(path)));
 
 

Example 2:

 
 mountResource("/filecontent/${name}", new FileSystemResourceReference("filesystem")
 {
        private static final long serialVersionUID = 1L;
 
        @Override
        public IResource getResource()
        {
                return new FileSystemResource()
                {
                        private static final long serialVersionUID = 1L;
 
                        protected ResourceResponse newResourceResponse(Attributes attributes)
                        {
                                try
                                {
                                        String name = attributes.getParameters().get("name").toString("");
                                        URI uri = URI.create(
                                                "jar:file:////folder/example.zip!/zipfolder/" + name);
                                        return createResourceResponse(attributes, 
                                                FileSystemResourceReference.getPath(uri));
                                }
                                catch (IOException | URISyntaxException e)
                                {
                                        throw new WicketRuntimeException("Error while reading the file.", e);
                                }
                        };
                };
        }
 });
 
 

Author:

Tobias Soloschenko

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.wicket.request.resource.ResourceReference

ResourceReference.Key, ResourceReference.LambdaResourceReference, ResourceReference.UrlAttributes

Constructor Summary

Constructors

Constructor	Description
FileSystemResourceReference(Class<?> scope, String name)	Creates a file system resource reference based on the given scope and name
FileSystemResourceReference(String name)	Creates a file system resource reference based on the given name
FileSystemResourceReference(String name, Path path)	Creates a file system resource reference based on the given path

Method Summary

Modifier and Type	Method	Description
protected FileSystemResource	getFileSystemResource()	Gets the file system resource to be used for the resource reference
static Path	getPath(URI uri)	Creates a path and a file system (if required) based on the given URI
static Path	getPath(URI uri, Map<String,String> env)	Creates a path and a file system (if required) based on the given URI
IResource	getResource()	Creates a new FileSystemResource and applies the path to it.

Methods inherited from class org.apache.wicket.request.resource.ResourceReference

canBeRegistered, equals, getDependencies, getExtension, getKey, getLocale, getName, getScope, getStyle, getUrlAttributes, getVariation, hashCode, of, of, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

FileSystemResourceReference

public FileSystemResourceReference(String name,
                                   Path path)

Creates a file system resource reference based on the given path

Parameters:

name - the name of the resource reference to expose data

path - the path to create the resource reference

FileSystemResourceReference

public FileSystemResourceReference(String name)

Creates a file system resource reference based on the given name

Parameters:

name - the name of the resource reference

FileSystemResourceReference

public FileSystemResourceReference(Class<?> scope,
                                   String name)

Creates a file system resource reference based on the given scope and name

Parameters:

scope - the scope as class

name - the name of the resource reference

Method Detail

getResource

public IResource getResource()

Creates a new FileSystemResource and applies the path to it.

Specified by:

getResource in class ResourceReference

Returns:

resource instance

getFileSystemResource

protected FileSystemResource getFileSystemResource()

Gets the file system resource to be used for the resource reference

Returns:

the file system resource to be used for the resource reference

getPath

public static Path getPath(URI uri,
                           Map<String,String> env)

Creates a path and a file system (if required) based on the given URI

Parameters:

uri - the URI to create the file system and the path of

env - the environment parameter to create the file system with

Returns:

the path of the file in the file system

getPath

public static Path getPath(URI uri)
                    throws IOException,
                           URISyntaxException

Creates a path and a file system (if required) based on the given URI

Parameters:

uri - the URI to create the file system and the path of

Returns:

the path of the file in the file system

Throws:

IOException - if the file system could'nt be created

URISyntaxException - if the URI has no valid syntax