Package org.apache.tika.detect

Class TextDetector

java.lang.Object
org.apache.tika.detect.TextDetector
All Implemented Interfaces:
Serializable, Detector
public class TextDetector extends Object implements Detector
Content type detection of plain text documents. This detector looks at the beginning of the document input stream and considers the document to be a text document if no ASCII (ISO-Latin-1, UTF-8, etc.) control bytes are found. As a special case some control bytes (up to 2% of all characters) are also allowed in a text document if it also contains no or just a few (less than 10%) characters above the 7-bit ASCII range.

Note that text documents with a character encoding like UTF-16 are better detected with MagicDetector and an appropriate magic byte pattern.

Since:
Apache Tika 0.3
See Also:

  • Constructor Details

    • TextDetector

      public TextDetector()
      Constructs a TextDetector which will look at the default number of bytes from the beginning of the document.

    • TextDetector

      public TextDetector(int bytesToTest)
      Constructs a TextDetector which will look at a given number of bytes from the beginning of the document.

  • Method Details

    • detect

      public MediaType detect(InputStream input, Metadata metadata) throws IOException
      Looks at the beginning of the document input stream to determine whether the document is text or not.
      Specified by:
      detect in interface Detector
      Parameters:
      input - document input stream, or null
      metadata - ignored
      Returns:
      "text/plain" if the input stream suggest a text document, "application/octet-stream" otherwise
      Throws:
      IOException - if the document input stream could not be read