Package com.vaadin.util

Class FileTypeResolver

  • public class FileTypeResolver
extends java.lang.Object
    Utility class that can figure out mime-types and icons related to files.

    Note : The icons are associated purely to mime-types, so a file may not have a custom icon accessible with this class.

    Since:
    3.0
    Author:
    Vaadin Ltd.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      static Resource DEFAULT_ICON
      Default icon given if no icon is specified for a mime-type.
      static java.lang.String DEFAULT_MIME_TYPE
      Default mime-type.

    • Constructor Summary

      Constructors 
      Modifier Constructor Description
      protected FileTypeResolver()  

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static void addExtension​(java.lang.String extension, java.lang.String mimeType)
      Adds a mime-type mapping for the given filename extension.
      static java.util.Map<java.lang.String,​java.lang.String> getExtensionToMIMETypeMapping()
      Gets the internal file extension to mime-type mapping.
      static java.lang.String getMIMEType​(java.io.File file)
      Gets the mime-type for a file.
      static java.lang.String getMIMEType​(java.lang.String fileName)
      Gets the mime-type of a file.

      • Methods inherited from class java.lang.Object

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

    • Field Detail

      • DEFAULT_ICON

        public static Resource DEFAULT_ICON
        Default icon given if no icon is specified for a mime-type.

      • DEFAULT_MIME_TYPE

        public static java.lang.String DEFAULT_MIME_TYPE
        Default mime-type.

    • Constructor Detail

      • FileTypeResolver

        protected FileTypeResolver()

    • Method Detail

      • getMIMEType

        public static java.lang.String getMIMEType​(java.lang.String fileName)
        Gets the mime-type of a file. Currently the mime-type is resolved based only on the file name extension.
        Parameters:
        fileName - the name of the file whose mime-type is requested.
        Returns:
        mime-type String for the given filename

      • getMIMEType

        public static java.lang.String getMIMEType​(java.io.File file)
        Gets the mime-type for a file. Currently the returned file type is resolved by the filename extension only.
        Parameters:
        file - the file whose mime-type is requested.
        Returns:
        the files mime-type String

      • addExtension

        public static void addExtension​(java.lang.String extension,
                                java.lang.String mimeType)
        Adds a mime-type mapping for the given filename extension. If the extension is already in the internal mapping it is overwritten.
        Parameters:
        extension - the filename extension to be associated with MIMEType.
        mimeType - the new mime-type for extension.

      • getExtensionToMIMETypeMapping

        public static java.util.Map<java.lang.String,​java.lang.String> getExtensionToMIMETypeMapping()
        Gets the internal file extension to mime-type mapping.
        Returns:
        unmodifiable map containing the current file extension to mime-type mapping