Class VariableIsEmptyExpressionFunction

java.lang.Object

org.flowable.common.engine.impl.el.function.AbstractFlowableVariableExpressionFunction

org.flowable.common.engine.impl.el.function.VariableIsEmptyExpressionFunction

All Implemented Interfaces:

FlowableFunctionDelegate, FlowableAstFunctionCreator

public class VariableIsEmptyExpressionFunction
extends AbstractFlowableVariableExpressionFunction

Checks if the value of a variable (fetched using the variableName through the variable scope) is empty. Depending on the variable type, this means the following: - String: following StringUtils.isEmpty(CharSequence) semantics - Collection: if the collection has no elements - Json Array: if the json array has no elements. When the variable value is null, true is returned in all cases. When the variable value is not null, and the instance type is not one of the cases above, false will be returned.

Author:

Joram Barrez

Field Summary

Fields inherited from class AbstractFlowableVariableExpressionFunction

functionName, functionNamesOptions, method, variableScopeName

Constructor Summary

Constructors

Constructor	Description
VariableIsEmptyExpressionFunction()

Method Summary

Modifier and Type	Method	Description
static boolean	isEmpty(VariableContainer variableContainer, String variableName)

Methods inherited from class AbstractFlowableVariableExpressionFunction

createFunction, createVariableNameNode, findMethod, functionMethod, getFunctionNames, getVariableValue, localName, localNames, prefix, prefixes, valuesAreNumbers

Methods inherited from class Object

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

Methods inherited from interface FlowableFunctionDelegate

functionMethod

Constructor Details

VariableIsEmptyExpressionFunction

public VariableIsEmptyExpressionFunction()

Method Details

isEmpty

public static boolean isEmpty(VariableContainer variableContainer,
 String variableName)