Class: OpenWFE::AttributeExpression

Inherits:
FlowExpression show all
Defined in:
lib/openwfe/expressions/fe_fqv.rb

Overview

The ‘a’ or ‘attribute’ expression. Directly describing some variable or list content in XML or in YAML.

_set :field => "list" do
    _a """
        <list>
            <string>a</string>
            <string>b</string>
            <string>c</string>
        </list>
    """
end

or

_set :field => "list" do
    _attribute """
--- 
- a
- b
- c
    """
 end

Note that it’s actually easier to write :

_set :filed => "list" do
    reval "[ 'a', 'b', 'c' ]"
end

but it’s less secure.

Instance Attribute Summary

Attributes inherited from FlowExpression

#apply_time, #attributes, #children, #environment_id, #fei, #parent_id, #raw_representation

Attributes included from Contextual

#application_context

Instance Method Summary collapse

Methods inherited from FlowExpression

#cancel, #clean_children, #delete_variable, #dup_environment, #fetch_environment, #fetch_text_content, #get_binding, #get_environment, #get_parent, #get_root_environment, #has_attribute, #initialize, is_definition, is_definition?, #lookup_attribute, #lookup_attributes, #lookup_boolean_attribute, #lookup_comma_list_attribute, #lookup_downcase_attribute, #lookup_ref, #lookup_string_attribute, #lookup_sym_attribute, #lookup_value, #lookup_variable, #lookup_vf_attribute, names, #new_environment, new_exp, #owns_its_environment?, #paused?, #remove_child, #reply, #reply_to_parent, #set_variable, #store_itself, #synchronize, #to_s, #to_yaml_properties

Methods included from Contextual

#get_work_directory, #init_service, #lookup

Methods included from Logging

#ldebug, #ldebug_callstack, #lerror, #lfatal, #linfo, #llog, #lunknown, #lwarn

Methods included from OwfeServiceLocator

#get_engine, #get_error_journal, #get_expool, #get_expression_map, #get_expression_pool, #get_expression_storage, #get_expression_storages, #get_journal, #get_participant_map, #get_scheduler, #get_wfid_generator

Methods inherited from ObjectWithMeta

#class_def, meta_def, meta_eval, metaclass

Constructor Details

This class inherits a constructor from OpenWFE::FlowExpression

Instance Method Details

#apply(workitem) ⇒ Object 



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# File 'lib/openwfe/expressions/fe_fqv.rb', line 156

def apply workitem

    #text = fetch_text_content workitem
    #text = text.strip
    #result = if text[0, 3] == "---"
    #    YAML.load text
    #else
    #    d = REXML::Document.new text
    #    XmlCodec::decode_attribute d.root
    #end

    child = @children.first

    text = if child.is_a?(String)

        child

    elsif child.is_a?(FlowExpressionId)

        exp = get_expression_pool.fetch_expression child
        ExpressionTree.to_s exp.raw_representation

    else

        child.to_s
    end

    text = text.strip

    result = if text[0, 3] == '---'
        YAML.load text
    else
        d = REXML::Document.new text
        XmlCodec::decode_attribute d.root
    end

    workitem.set_result(result) if result != nil

    reply_to_parent workitem
end