com.haulmont.cuba.gui.app.core.file

Class FileDownloadHelper

java.lang.Object

com.haulmont.cuba.gui.app.core.file.FileDownloadHelper

public class FileDownloadHelper
extends java.lang.Object

Helper class for displaying uploaded files.

Constructor Summary

Constructors

Constructor and Description
FileDownloadHelper()

Method Summary

Modifier and Type	Method and Description
static java.lang.String	formatFileSize(long fileSize) Format file size for displaying in bytes, KB, MB.
static java.lang.String	formatFileSize(long longSize, int decimalPos) Format file size for displaying in bytes, KB, MB.
static void	initGeneratedColumn(Table table) Initializes a column for downloading files in a table displaying FileDescriptors.
static void	initGeneratedColumn(Table table, java.lang.String fileProperty) Initializes a table column for downloading files.
static java.lang.String	makeLink(FileDescriptor fd, boolean newWindow, boolean attachment) Creates HTML link for downloading a file.
static java.lang.String	makeUrl(FileDescriptor fd, boolean attachment) Creates URL for downloading a file.

Methods inherited from class java.lang.Object

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

Constructor Detail

FileDownloadHelper

public FileDownloadHelper()

Method Detail

makeLink

public static java.lang.String makeLink(FileDescriptor fd,
                                        boolean newWindow,
                                        boolean attachment)

Creates HTML link for downloading a file.

Parameters:

fd - file descriptor

newWindow - adds target="_blank"

attachment - sets Content-Disposition: attachment

Returns:

HTML string

makeUrl

public static java.lang.String makeUrl(FileDescriptor fd,
                                       boolean attachment)

Creates URL for downloading a file.

Parameters:

fd - file descriptor

attachment - sets Content-Disposition: attachment

Returns:

URL string

initGeneratedColumn

public static void initGeneratedColumn(Table table)

Initializes a column for downloading files in a table displaying FileDescriptors.

Parameters:

table - table that displays instances of the FileDescriptor entity

initGeneratedColumn

public static void initGeneratedColumn(Table table,
                                       java.lang.String fileProperty)

Initializes a table column for downloading files.

Parameters:

table - table displaying some entity

fileProperty - property of the entity which is a reference to FileDescriptor

formatFileSize

public static java.lang.String formatFileSize(long longSize,
                                              int decimalPos)

Format file size for displaying in bytes, KB, MB.

Parameters:

longSize - size in bytes

decimalPos - maximum fraction digits

Returns:

formatted value

formatFileSize

public static java.lang.String formatFileSize(long fileSize)

Format file size for displaying in bytes, KB, MB.

Parameters:

fileSize - size in bytes

Returns:

formatted value