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

Class VariableIsEmptyExpressionFunction

java.lang.Object

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

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

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

All Implemented Interfaces:

FlowableExpressionEnhancer, FlowableFunctionDelegate, FlowableShortHandExpressionFunction

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 - ArrayNode: if the json array has no elements. When the variable value is null, true is returned in all cases. When the variale 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 org.flowable.common.engine.impl.el.function.AbstractFlowableShortHandExpressionFunction

functionName, localName, method, pattern, prefix, replacePattern, variableScopeName

Constructor Summary

Constructors

Constructor and Description
VariableIsEmptyExpressionFunction(String variableScopeName)

Method Summary

Modifier and Type	Method and Description
static boolean	isEmpty(VariableScope variableScope, String variableName)
protected boolean	isMultiParameterFunction()

Methods inherited from class org.flowable.common.engine.impl.el.function.AbstractFlowableVariableExpressionFunction

getFinalFunctionPrefix, getFunctionPrefixOptions, getVariableValue, prefix, valuesAreNumbers

Methods inherited from class org.flowable.common.engine.impl.el.function.AbstractFlowableShortHandExpressionFunction

buildOrWordGroup, enhance, findMethod, functionMethod, isNoParameterMethod, localName

Methods inherited from class java.lang.Object

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

Constructor Detail

VariableIsEmptyExpressionFunction

public VariableIsEmptyExpressionFunction(String variableScopeName)

Method Detail

isMultiParameterFunction

protected boolean isMultiParameterFunction()

Overrides:

isMultiParameterFunction in class AbstractFlowableVariableExpressionFunction

isEmpty

public static boolean isEmpty(VariableScope variableScope,
                              String variableName)