ch.randelshofer.activation

Class ZipRecognizer

java.lang.Object

ch.randelshofer.activation.ZipRecognizer

All Implemented Interfaces:

Recognizer

public class ZipRecognizer
extends java.lang.Object
implements Recognizer

This recognizer can identify Zip files.

Version:

1.0 2009-12-22 Created.

Author:

Werner Randelshofer, Hausmatt 10, CH-6405 Immensee, Switzerland.

Field Summary

Fields inherited from interface ch.randelshofer.activation.Recognizer

CONTENT_TYPE_OCTET_STREAM, CONTENT_TYPE_UNKNOWN

Method Summary

Methods

Modifier and Type	Method and Description
java.lang.String	getContentType(byte[] dataSnippet) Return the base MIME Type of this data.
static ZipRecognizer	getInstance()
int	getMinimalDeterminableDataLength() Return the number of bytes needed to determine the content type.

Methods inherited from class java.lang.Object

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

Method Detail

getInstance

public static ZipRecognizer getInstance()

getMinimalDeterminableDataLength

public int getMinimalDeterminableDataLength()

Return the number of bytes needed to determine the content type.

Specified by:

getMinimalDeterminableDataLength in interface Recognizer

getContentType

public java.lang.String getContentType(byte[] dataSnippet)

Return the base MIME Type of this data. This method is expected to ALWAYS return a valid (non-null) MIME Type.

Returns "application/zip" if the file starts with "PK".

Specified by:

getContentType in interface Recognizer

Parameters:

dataSnippet - the first few bytes of the data file.

Returns:

MIME Type or application/octet-stream' if content type can not be determined.