Package org.opencms.search.extractors

Class A_CmsTextExtractor

java.lang.Object

org.opencms.search.extractors.A_CmsTextExtractor

All Implemented Interfaces:

I_CmsTextExtractor

Direct Known Subclasses:

CmsExtractorHtml, CmsExtractorMsOfficeOLE2, CmsExtractorMsOfficeOOXML, CmsExtractorOpenOffice, CmsExtractorPdf, CmsExtractorRtf

public abstract class A_CmsTextExtractor
extends Object
implements I_CmsTextExtractor

Base utility class that allows extraction of the indexable "plain" text from a given document format.

Since:

6.0.0

Constructor Summary

Constructors

Constructor	Description
A_CmsTextExtractor()

Method Summary

Modifier and Type	Method	Description
protected void	combineContentItem(String itemValue, String itemKey, StringBuffer content, Map<String,String> contentItems)	Combines a meta information item extracted from the document with the main content buffer and also stores the individual information as item in the Map of content items.
I_CmsExtractionResult	extractText(byte[] content)	Extracts the text and meta information from the given binary document.
I_CmsExtractionResult	extractText(byte[] content, String encoding)	Extracts the text and meta information from the given binary document, using the specified content encoding.
I_CmsExtractionResult	extractText(InputStream in)	Extracts the text and meta information from the document on the input stream.
I_CmsExtractionResult	extractText(InputStream in, String encoding)	Extracts the text and meta information from the document on the input stream, using the specified content encoding.
protected CmsExtractionResult	extractText(InputStream in, org.apache.tika.parser.Parser parser)	Parses the given input stream with the provided parser and returns the result as a map of content items.
protected String	removeControlChars(String content)	Removes "unwanted" control chars from the given content.

Methods inherited from class java.lang.Object

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

Constructor Details

A_CmsTextExtractor

public A_CmsTextExtractor()

Method Details

extractText

public I_CmsExtractionResult extractText(byte[] content)
                                  throws Exception

Description copied from interface: I_CmsTextExtractor

Extracts the text and meta information from the given binary document.

The encoding of the input stream is either not required (the document type may have one common default encoding) or the extractor is able to divine the encoding from the provided binary array automatically.

Delivers is the same result as calling I_CmsTextExtractor.extractText(byte[], String) when String == null.

Specified by:

extractText in interface I_CmsTextExtractor

Parameters:

content - the binary content of the document to extract the text from

Returns:

the extracted text

Throws:

Exception - if the text extration fails

See Also:

• I_CmsTextExtractor.extractText(byte[])

extractText

public I_CmsExtractionResult extractText(byte[] content,
 String encoding)
                                  throws Exception

Description copied from interface: I_CmsTextExtractor

Extracts the text and meta information from the given binary document, using the specified content encoding.

The encoding is a hint for the text extractor, if the value given is null then the text extractor should try to figure out the encoding itself.

Specified by:

extractText in interface I_CmsTextExtractor

Parameters:

content - the binary content of the document to extract the text from

encoding - the encoding to use

Returns:

the extracted text

Throws:

Exception - if the text extration fails

See Also:

• I_CmsTextExtractor.extractText(byte[], java.lang.String)

extractText

public I_CmsExtractionResult extractText(InputStream in)
                                  throws Exception

Description copied from interface: I_CmsTextExtractor

Extracts the text and meta information from the document on the input stream.

The encoding of the input stream is either not required (the document type may have one common default encoding) or the extractor is able to divine the encoding from the provided input stream automatically.

Delivers is the same result as calling I_CmsTextExtractor.extractText(InputStream, String) when String == null.

Specified by:

extractText in interface I_CmsTextExtractor

Parameters:

in - the input stream for the document to extract the text from

Returns:

the extracted text and meta information

Throws:

Exception - if the text extration fails

See Also:

• I_CmsTextExtractor.extractText(java.io.InputStream)

extractText

public I_CmsExtractionResult extractText(InputStream in,
 String encoding)
                                  throws Exception

Description copied from interface: I_CmsTextExtractor

Extracts the text and meta information from the document on the input stream, using the specified content encoding.

The encoding is a hint for the text extractor, if the value given is null then the text extractor should try to figure out the encoding itself.

Specified by:

extractText in interface I_CmsTextExtractor

Parameters:

in - the input stream for the document to extract the text from

encoding - the encoding to use

Returns:

the extracted text and meta information

Throws:

Exception - if the text extration fails

See Also:

• I_CmsTextExtractor.extractText(java.io.InputStream, java.lang.String)

combineContentItem

protected void combineContentItem(String itemValue,
 String itemKey,
 StringBuffer content,
 Map<String,String> contentItems)

Combines a meta information item extracted from the document with the main content buffer and also stores the individual information as item in the Map of content items.

Parameters:

itemValue - the value of the item to store

itemKey - the key in the Map of content items

content - a buffer where to append the content item

contentItems - the Map of individual content items

extractText

protected CmsExtractionResult extractText(InputStream in,
 org.apache.tika.parser.Parser parser)
                                   throws Exception

Parses the given input stream with the provided parser and returns the result as a map of content items.

Parameters:

in - the input stream for the content to parse

parser - the parser to use

Returns:

the result of the parsing as a map of content items

Throws:

Exception - in case something goes wrong

removeControlChars

protected String removeControlChars(String content)

Removes "unwanted" control chars from the given content.

Parameters:

content - the content to remove the unwanted control chars from

Returns:

the content with the unwanted control chars removed