Array or JSON Object Process Variable

Flowable Engine
2

Hi,

the exception says:

org.flowable.engine.common.api.FlowableException: couldn't find a variable type that is able to serialize [object Array]
	at org.flowable.engine.impl.variable.DefaultVariableTypes.findVariableType(DefaultVariableTypes.java:62)
	at org.flowable.engine.impl.persistence.entity.VariableScopeImpl.createVariableInstance(VariableScopeImpl.java:863)
	at org.flowable.engine.impl.persistence.entity.ExecutionEntityImpl.createVariableInstance(ExecutionEntityImpl.java:531)
	at org.flowable.engine.impl.persistence.entity.VariableScopeImpl.createVariableLocal(VariableScopeImpl.java:784)
	at org.flowable.engine.impl.persistence.entity.VariableScopeImpl.setVariable(VariableScopeImpl.java:662)
	at org.flowable.engine.impl.persistence.entity.VariableScopeImpl.setVariable(VariableScopeImpl.java:654)

You can easily add new type support in ProcessEngineConfiguration.
See org.flowable.engine.impl.cfg.ProcessEngineConfigurationImpl#initVariableTypes

public void initVariableTypes() {
    if (variableTypes == null) {
        variableTypes = new DefaultVariableTypes();
        if (customPreVariableTypes != null) {
            for (VariableType customVariableType : customPreVariableTypes) {
                variableTypes.addType(customVariableType);
            }
        }
        variableTypes.addType(new NullType());
        variableTypes.addType(new StringType(getMaxLengthString()));
        variableTypes.addType(new LongStringType(getMaxLengthString() + 1));

The example in the jUnit test is org.flowable.examples.variables.VariablesTest#testBasicVariableOperations

Regards
Martin