Package org.apache.solr.response.transform

Class DocTransformers

java.lang.Object

org.apache.solr.response.transform.DocTransformer

org.apache.solr.response.transform.DocTransformers

public class DocTransformers
extends DocTransformer

Transform a document before it gets sent out

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.solr.response.transform.DocTransformer

DocTransformer.NoopFieldTransformer

Field Summary

Fields inherited from class org.apache.solr.response.transform.DocTransformer

context

Constructor Summary

Constructors

Constructor	Description
DocTransformers()

Method Summary

Modifier and Type	Method	Description
void	addTransformer(DocTransformer a)
String	getName()
Collection<String>	getRawFields()	If this transformer wants to bypass escaping in the TextResponseWriter and write content directly to output for certain field(s), the names of any such field(s) should be returned
DocTransformer	getTransformer(int idx)
boolean	needsSolrIndexSearcher()	Returns true if and only if at least 1 child transformer returns true
void	setContext(ResultContext context)	This is called before DocTransformer.transform(org.apache.solr.common.SolrDocument, int, org.apache.solr.search.DocIterationInfo) to provide context for any subsequent transformations.
int	size()
void	transform(org.apache.solr.common.SolrDocument doc, int docid, DocIterationInfo docInfo)	This is where implementations do the actual work.

Methods inherited from class org.apache.solr.response.transform.DocTransformer

getExtraRequestFields, toString

Methods inherited from class java.lang.Object

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

Constructor Details

DocTransformers

public DocTransformers()

Method Details

getName

public String getName()

Specified by:

getName in class DocTransformer

Returns:

The name of the transformer

getRawFields

public Collection<String> getRawFields()

Description copied from class: DocTransformer

If this transformer wants to bypass escaping in the TextResponseWriter and write content directly to output for certain field(s), the names of any such field(s) should be returned

NOTE: normally this will be conditional on the `wt` param in the request, as supplied to the DocTransformer's parent TransformerFactory at the time of transformer creation.

Overrides:

getRawFields in class DocTransformer

Returns:

Collection containing field names to be written raw; if no field names should be written raw, an empty collection should be returned. Any collection returned collection need not be externally modifiable -- i.e., Collections.singleton(Object) is acceptable.

addTransformer

public void addTransformer(DocTransformer a)

size

public int size()

getTransformer

public DocTransformer getTransformer(int idx)

setContext

public void setContext(ResultContext context)

Description copied from class: DocTransformer

This is called before DocTransformer.transform(org.apache.solr.common.SolrDocument, int, org.apache.solr.search.DocIterationInfo) to provide context for any subsequent transformations.

Overrides:

setContext in class DocTransformer

Parameters:

context - The ResultContext stores information about how the documents were produced.

See Also:

• DocTransformer.needsSolrIndexSearcher()

transform

public void transform(org.apache.solr.common.SolrDocument doc,
 int docid,
 DocIterationInfo docInfo)
               throws IOException

Description copied from class: DocTransformer

This is where implementations do the actual work. If implementations require a valid docId and index access, the DocTransformer.needsSolrIndexSearcher() method must return true

Specified by:

transform in class DocTransformer

Parameters:

doc - The document to alter

docid - The Lucene internal doc id, or -1 in cases where the doc did not come from the index

docInfo - the document information for this document, including the score. Do not pass null, instead use DocIterationInfo.NONE.

Throws:

IOException - If there is a low-level I/O error.

See Also:

• DocTransformer.needsSolrIndexSearcher()

needsSolrIndexSearcher

public boolean needsSolrIndexSearcher()

Returns true if and only if at least 1 child transformer returns true

Overrides:

needsSolrIndexSearcher in class DocTransformer

See Also:

• ResultContext.getSearcher()
• DocTransformer.transform(org.apache.solr.common.SolrDocument, int, org.apache.solr.search.DocIterationInfo)