com.drew.imaging

Class FileTypeDetector

java.lang.Object

com.drew.imaging.FileTypeDetector

public class FileTypeDetector
extends Object

Examines a file's first bytes and estimates the file's type.

Method Summary

Modifier and Type	Method and Description
static FileType	detectFileType(InputStream inputStream) Examines the file's bytes and estimates the file's type.
static FileType	detectFileType(InputStream inputStream, String filePath) Examines the file's bytes and estimates the file's type.

Methods inherited from class java.lang.Object

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

Method Detail

detectFileType

public static FileType detectFileType(InputStream inputStream)
                               throws IOException

Examines the file's bytes and estimates the file's type.

The input stream must support mark and reset, in order to return the stream to the position at which it was provided to this method once completed.

Requires the stream to contain at least eight bytes.

Throws:

IOException - if the stream does not support mark/reset.

detectFileType

public static FileType detectFileType(InputStream inputStream,
                                      String filePath)
                               throws IOException

Examines the file's bytes and estimates the file's type. When ambiguous, use the file name extension (if available).

The input stream must support mark and reset, in order to return the stream to the position at which it was provided to this method once completed.

Requires the stream to contain at least eight bytes.

Parameters:

filePath - The file path or file name of the file, if available. Only the extension is used.

Throws:

IOException - if the stream does not support mark/reset.