org.apache.solr.handler.dataimport

Class Evaluator

java.lang.Object

org.apache.solr.handler.dataimport.Evaluator

Direct Known Subclasses:

DateFormatEvaluator, SolrQueryEscapingEvaluator, SqlEscapingEvaluator, UrlEvaluator

public abstract class Evaluator
extends Object

Pluggable functions for resolving variables

Implementations of this abstract class must provide a public no-arg constructor.

Refer to http://wiki.apache.org/solr/DataImportHandler for more details.

This API is experimental and may change in the future.

Since:

solr 1.3

Field Summary

Fields

Modifier and Type	Field and Description
static String	DATE_FORMAT_EVALUATOR
static String	ESCAPE_SOLR_QUERY_CHARS
static String	SQL_ESCAPE_EVALUATOR
static String	URL_ENCODE_EVALUATOR

Constructor Summary

Constructors

Constructor and Description
Evaluator()

Method Summary

Methods

Modifier and Type	Method and Description
abstract String	evaluate(String expression, Context context) Return a String after processing an expression and a VariableResolver

Methods inherited from class java.lang.Object

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

Field Detail

DATE_FORMAT_EVALUATOR

public static final String DATE_FORMAT_EVALUATOR

See Also:

Constant Field Values

URL_ENCODE_EVALUATOR

public static final String URL_ENCODE_EVALUATOR

See Also:

Constant Field Values

ESCAPE_SOLR_QUERY_CHARS

public static final String ESCAPE_SOLR_QUERY_CHARS

See Also:

Constant Field Values

SQL_ESCAPE_EVALUATOR

public static final String SQL_ESCAPE_EVALUATOR

See Also:

Constant Field Values

Constructor Detail

Evaluator

public Evaluator()

Method Detail

evaluate

public abstract String evaluate(String expression,
              Context context)

Return a String after processing an expression and a VariableResolver

Parameters:

expression - string to be evaluated

context - instance

Returns:

the value of the given expression evaluated using the resolver

See Also:

VariableResolver