Package org.apache.solr.update.processor

Class SolrInputDocumentReader

java.lang.Object

java.io.Reader

org.apache.solr.update.processor.SolrInputDocumentReader

All Implemented Interfaces:

Closeable, AutoCloseable, Readable

public class SolrInputDocumentReader
extends Reader

Reader on top of SolrInputDocument that can "stream" a document as a character stream in a memory efficient way, to avoid potentially large intermediate string buffers containing whole document content.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Field Summary

Fields inherited from class java.io.Reader

lock

Constructor Summary

Constructors

Constructor	Description
SolrInputDocumentReader(SolrInputDocument doc, int maxTotalChars, int maxCharsPerFieldValue)	Creates a character-stream reader that streams all String fields in the document with space as separator
SolrInputDocumentReader(SolrInputDocument doc, String[] fields, int maxTotalChars, int maxCharsPerFieldValue, String fieldValueSep)	Creates a character-stream reader that reads the listed fields in order, with max lengths as specified.

Method Summary

Modifier and Type	Method	Description
static String	asString(Reader reader)	Gets the whole reader as a String
void	close()
protected static String[]	getStringFields(SolrInputDocument doc)
int	read(char[] cbuf, int off, int len)
boolean	ready()
void	setEodReturnValue(int eodReturnValue)	Choose another return value than -1 for end of document reached.

Methods inherited from class java.io.Reader

mark, markSupported, read, read, read, reset, skip

Methods inherited from class java.lang.Object

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

Constructor Detail

SolrInputDocumentReader

public SolrInputDocumentReader(SolrInputDocument doc,
                               int maxTotalChars,
                               int maxCharsPerFieldValue)

Creates a character-stream reader that streams all String fields in the document with space as separator

Parameters:

doc - Solr input document

maxCharsPerFieldValue - max chars to consume per field value

maxTotalChars - max chars to consume total

SolrInputDocumentReader

public SolrInputDocumentReader(SolrInputDocument doc,
                               String[] fields,
                               int maxTotalChars,
                               int maxCharsPerFieldValue,
                               String fieldValueSep)

Creates a character-stream reader that reads the listed fields in order, with max lengths as specified.

Parameters:

doc - Solr input document

fields - list of field names to include

fieldValueSep - separator to insert between field values

maxCharsPerFieldValue - max chars to consume per field value

maxTotalChars - max chars to consume total

Method Detail

read

public int read(char[] cbuf,
                int off,
                int len)
         throws IOException

Specified by:

read in class Reader

Throws:

IOException

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Specified by:

close in class Reader

Throws:

IOException

ready

public boolean ready()
              throws IOException

Overrides:

ready in class Reader

Throws:

IOException

setEodReturnValue

public void setEodReturnValue(int eodReturnValue)

Choose another return value than -1 for end of document reached. Warning: Only to work around buggy consumers such as LangDetect 1.1

Parameters:

eodReturnValue - integer which defaults to -1

asString

public static String asString(Reader reader)

Gets the whole reader as a String

Returns:

string of concatenated fields

getStringFields

protected static String[] getStringFields(SolrInputDocument doc)