org.springframework.data.hadoop.store.expression

Class MapExpressionMethods

java.lang.Object

org.springframework.data.hadoop.store.expression.MapExpressionMethods

public class MapExpressionMethods
extends java.lang.Object

Helper class to work with a spel expressions resolving values from a Map.

Author:

Janne Valkealahti

Constructor Summary

Constructors

Constructor and Description
MapExpressionMethods() Instantiates a new map expression methods.
MapExpressionMethods(org.springframework.expression.EvaluationContext evaluationContext) Instantiates a new map expression methods with a EvaluationContext which is expected to be a StandardEvaluationContext.
MapExpressionMethods(org.springframework.expression.spel.support.StandardEvaluationContext evaluationContext, boolean autoCustomize, boolean replaceMethodResolver)

Method Summary

Methods

Modifier and Type	Method and Description
<T> T	getValue(org.springframework.expression.Expression expression, java.util.Map<java.lang.String,java.lang.Object> map, java.lang.Class<T> desiredResultType) Gets the value.

Methods inherited from class java.lang.Object

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

Constructor Detail

MapExpressionMethods

public MapExpressionMethods()

Instantiates a new map expression methods.

MapExpressionMethods

public MapExpressionMethods(org.springframework.expression.EvaluationContext evaluationContext)

Instantiates a new map expression methods with a EvaluationContext which is expected to be a StandardEvaluationContext.

Parameters:

evaluationContext - the passed evaluation context

MapExpressionMethods

public MapExpressionMethods(org.springframework.expression.spel.support.StandardEvaluationContext evaluationContext,
                    boolean autoCustomize,
                    boolean replaceMethodResolver)

Method Detail

getValue

public <T> T getValue(org.springframework.expression.Expression expression,
             java.util.Map<java.lang.String,java.lang.Object> map,
             java.lang.Class<T> desiredResultType)
           throws org.springframework.expression.EvaluationException

Gets the value.

Type Parameters:

T - the generic return type

Parameters:

expression - the expression

map - the map to evaluate against

desiredResultType - the desired result type

Returns:

the value of expression evaluation

Throws:

org.springframework.expression.EvaluationException - the evaluation exception