org.apache.ofbiz.base.util.string

Class UelUtil

java.lang.Object

org.apache.ofbiz.base.util.string.UelUtil

public final class UelUtil
extends Object

Implements the Unified Expression Language (JSR-245).

Method Summary

Modifier and Type	Method and Description
static Object	autoVivifyListOrMap(Object property) Evaluates a property Object and returns a new List or Map.
static Object	evaluate(Map<String,? extends Object> context, String expression) Evaluates a Unified Expression Language expression and returns the result.
static Object	evaluate(Map<String,? extends Object> context, String expression, Class<?> expectedType) Evaluates a Unified Expression Language expression and returns the result.
static String	getLocalizedMapLocaleKey()
static String	prepareExpression(String expression) Prepares an expression for evaluation by UEL.
static void	removeValue(Map<String,Object> context, String expression) Evaluates a Unified Expression Language expression and sets the resulting object to null.
static Object	resolveVariable(String variable, Map<String,? extends Object> variables, Locale locale)
static void	setValue(Map<String,Object> context, String expression, Class<?> expectedType, Object value) Evaluates a Unified Expression Language expression and sets the resulting object to the specified value.

Methods inherited from class java.lang.Object

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

Method Detail

getLocalizedMapLocaleKey

public static String getLocalizedMapLocaleKey()

evaluate

public static Object evaluate(Map<String,? extends Object> context,
                              String expression)

Evaluates a Unified Expression Language expression and returns the result.

Parameters:

context - Evaluation context (variables)

expression - UEL expression

Returns:

Result object

evaluate

public static Object evaluate(Map<String,? extends Object> context,
                              String expression,
                              Class<?> expectedType)

Evaluates a Unified Expression Language expression and returns the result.

Parameters:

context - Evaluation context (variables)

expression - UEL expression

expectedType - The expected object Class to return

Returns:

Result object

setValue

public static void setValue(Map<String,Object> context,
                            String expression,
                            Class<?> expectedType,
                            Object value)

Evaluates a Unified Expression Language expression and sets the resulting object to the specified value.

Parameters:

context - Evaluation context (variables)

expression - UEL expression

expectedType - The expected object Class to set

removeValue

public static void removeValue(Map<String,Object> context,
                               String expression)

Evaluates a Unified Expression Language expression and sets the resulting object to null.

Parameters:

context - Evaluation context (variables)

expression - UEL expression

autoVivifyListOrMap

public static Object autoVivifyListOrMap(Object property)

Evaluates a property Object and returns a new List or Map. If property is not a String object type and it evaluates to an integer value, a new List instance is returned, otherwise a new Map instance is returned.

Parameters:

property - Property Object to be evaluated

Returns:

New List or Map

prepareExpression

public static String prepareExpression(String expression)

Prepares an expression for evaluation by UEL.

The OFBiz syntax is converted to UEL-compatible syntax and the resulting expression is returned.

Parameters:

expression - Expression to be converted

Returns:

Converted expression

See Also:

StringUtil.convertOperatorSubstitutions(java.lang.String)

resolveVariable

public static Object resolveVariable(String variable,
                                     Map<String,? extends Object> variables,
                                     Locale locale)