DCAE-D tosca-lab initial commit

DCAE-D tosca-lab initial commit

Change-Id: Ia42934ce7c75abe05fa106585c9334c8b048ee36
Issue-ID: SDC-1218
Signed-off-by: Stone, Avi (as206k) <as206k@att.com>

15 files changed, 638 insertions, 0 deletions

diff --git a/app/toscalib/utils/__init__.py b/app/toscalib/utils/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/app/toscalib/utils/__init__.py
diff --git a/app/toscalib/utils/__init__.pyc b/app/toscalib/utils/__init__.pyc
new file mode 100644
index 0000000..b047006
--- /dev/null
+++ b/app/toscalib/utils/__init__.pyc
diff --git a/app/toscalib/utils/tosca_export.py b/app/toscalib/utils/tosca_export.py
new file mode 100644
index 0000000..c4399ef
--- /dev/null
+++ b/app/toscalib/utils/tosca_export.py
@@ -0,0 +1,40 @@
+#Author: Shu Shi
+#emaiL: shushi@research.att.com
+
+
+import yaml
+import re
+from toscalib.templates.constant import *
+
+def _yaml_export(filename, content):    
+    out_str = yaml.safe_dump(content,  default_flow_style=False, width=float("inf"))
+    out_str = re.sub(YMO_PREFIX, '', out_str)
+    if filename == 'WEB':
+        return out_str
+    with open(filename, 'w') as outfile:
+        outfile.write(out_str)
+    return out_str
+
+def _heat_export(filename, content):
+    heat_ver = YMO_PREFIX + 'heat_template_version'
+    heat_content = content[YMO_TOPOLOGY]
+    if heat_content is None:
+        heat_content = {}
+    heat_content[heat_ver] = '2013-05-23'
+#    if heat_content.has_key(YMO_TOPO_OUTPUTS):
+    if YMO_TOPO_OUTPUTS in heat_content:
+        heat_content.pop(YMO_TOPO_OUTPUTS)
+        
+    out_str = yaml.dump(heat_content,  default_flow_style=False)
+    out_str = re.sub(YMO_TOPO_INPUTS, YMO_PREFIX+'parameters', out_str)
+    out_str = re.sub(YMO_TOPO_NODE_TEMPLATES, YMO_PREFIX+'resources', out_str)
+    
+    out_str = re.sub('get_input', 'get_param', out_str)
+    out_str = re.sub('get_attribute', 'get_attr', out_str)
+    out_str = re.sub('get_id', 'get_resource', out_str)
+    out_str = re.sub('get_property', 'get_attr', out_str)
+    out_str = re.sub('type: integer', 'type: number', out_str)
+        
+    out_str = re.sub(YMO_PREFIX, '', out_str)
+    with open(filename, 'w') as outfile:
+        outfile.write(out_str)
diff --git a/app/toscalib/utils/tosca_export.pyc b/app/toscalib/utils/tosca_export.pyc
new file mode 100644
index 0000000..2552481
--- /dev/null
+++ b/app/toscalib/utils/tosca_export.pyc
diff --git a/app/toscalib/utils/tosca_heat.py b/app/toscalib/utils/tosca_heat.py
new file mode 100644
index 0000000..ca5672c
--- /dev/null
+++ b/app/toscalib/utils/tosca_heat.py
@@ -0,0 +1,6 @@
+
+def _type_validate(type):
+    pass
+
+def _type_translate(type):
+    pass
\ No newline at end of file
diff --git a/app/toscalib/utils/tosca_heat.pyc b/app/toscalib/utils/tosca_heat.pyc
new file mode 100644
index 0000000..a69a761
--- /dev/null
+++ b/app/toscalib/utils/tosca_heat.pyc
diff --git a/app/toscalib/utils/tosca_import.py b/app/toscalib/utils/tosca_import.py
new file mode 100644
index 0000000..d0e2f03
--- /dev/null
+++ b/app/toscalib/utils/tosca_import.py
@@ -0,0 +1,296 @@
+#Author: Shu Shi
+#emaiL: shushi@research.att.com
+
+
+import os
+from toscalib.utils.yamlparser import load_yaml, simple_parse
+from toscalib.templates.database import ToscaDB
+from toscalib.types.node import NodeType
+from toscalib.types.data import DataType
+from toscalib.types.capability import CapabilityType
+from toscalib.types.relationship import RelationshipType
+from toscalib.templates.constant import *
+from toscalib.templates.topology import ToscaTopology
+from macpath import dirname
+import logging
+
+
+# _TRUE_VALUES = ('True', 'true', '1', 'yes')
+
+class import_context(object):
+    def __init__(self):
+        self.curr_path = os.getcwd()
+        self.curr_file_name = ''
+        self.metadata = None
+        self.temp_name = None
+        self.extra_imports = []
+        
+def _dir_import(files_imported, dir_name, db=None, ctx=None):
+    if db is None:
+        db = ToscaDB()
+    
+    if os.path.isdir(dir_name) is False:
+        logging.warning( 'Dir: '+ dir_name+ ' not exist! Loading failed!')
+        return db
+    
+    for f in os.listdir(dir_name):
+        filename = os.path.join(dir_name, f)
+        if os.path.isfile(filename):
+            try:
+                db = _file_import(files_imported, filename, db)
+            except ValueError:
+                logging.error( 'Fail to import file: '+ filename)
+                continue
+        if os.path.isdir(filename):
+            try: 
+                db = _dir_import(files_imported, filename, db)
+            except ValueError:
+                logging.error( 'Fail to import dir: '+ filename)
+                continue
+    
+    return db  
+ 
+     
+    
+def _file_import(files_imported, filename, db=None, ctx=None):
+    logging.debug( 'Start to import file: '+ filename)
+
+    if db is None:
+        db = ToscaDB()
+        
+    if ctx is None:
+        orig_import = True
+        ctx = import_context()
+    else:
+        orig_import = False
+            
+    if filename == os.path.abspath(filename):
+        full_file_path = filename
+    else:
+        full_file_path = os.path.abspath(os.path.join(ctx.curr_path, filename))
+        
+    if os.path.isfile(full_file_path) == False:
+        logging.debug( 'File: ' + filename + ' not exist! Import as extra import!')
+        ctx.extra_imports.append({filename:filename})
+        return db
+    
+    if full_file_path in files_imported:
+        logging.debug( 'File: ' + filename + ' has been imported!')
+        return db
+    
+    ctx.curr_path = os.path.dirname(full_file_path)
+    ctx.curr_file_name = os.path.basename(full_file_path)
+    parser = load_yaml(full_file_path)
+
+    ctx.extra_imports = []
+    
+#    if parser.has_key(IMPORT):
+    if IMPORT in parser:
+        db = _parse_import(files_imported, parser[IMPORT], db, ctx)
+#    if parser.has_key(METADATA):
+    if METADATA in parser:
+        ctx.metadata = parser[METADATA]
+#    if parser.has_key(DATA_TYPE):
+    if DATA_TYPE in parser:
+        db = _parse_data_type(parser[DATA_TYPE], db, ctx)
+#    if parser.has_key(NODE_TYPE):
+    if NODE_TYPE in parser:
+        db = _parse_node_type(parser[NODE_TYPE], db, ctx)
+#    if parser.has_key(TOPOLOGY):
+    if TOPOLOGY in parser:
+        db = _parse_topology_template(parser[TOPOLOGY], db, ctx)
+#    if parser.has_key(CAPABILITY_TYPE):
+    if CAPABILITY_TYPE in parser:
+        db = _parse_capability_type(parser[CAPABILITY_TYPE], db, ctx)
+#    if parser.has_key(RELATIONSHIP_TYPE):
+    if RELATIONSHIP_TYPE in parser:
+        db = _parse_relationship_type(parser[RELATIONSHIP_TYPE], db, ctx)
+    
+    if orig_import:
+        db._parse_objects()
+    
+    files_imported.append(full_file_path)
+    logging.debug( 'File '+ filename+ ' imported!')
+    return db
+
+def _single_template_file_import(filename, db=None, ctx=None):
+    logging.debug( 'Start to import file: '+ filename)
+
+    if db is None:
+        db = ToscaDB()
+        
+    if ctx is None:
+        ctx = import_context()
+            
+    if filename == os.path.abspath(filename):
+        full_file_path = filename
+    else:
+        full_file_path = os.path.abspath(os.path.join(ctx.curr_path, filename))
+        
+    if os.path.isfile(full_file_path) == False:
+        logging.warning( 'File: ' +filename + ' not exist! Import failed!')
+        return db
+    
+    
+    ctx.curr_path = os.path.dirname(full_file_path)
+    ctx.curr_file_name = os.path.basename(full_file_path)
+    parser = load_yaml(full_file_path)
+    
+#     if parser.has_key(IMPORT):
+#         db = _parse_import(files_imported, parser[IMPORT], db, ctx)
+    ctx.extra_imports = []
+#    if parser.has_key(IMPORT):
+    if IMPORT in parser:
+        db = _parse_import([], parser[IMPORT], db, ctx)
+#    if parser.has_key(METADATA):
+    if METADATA in parser:
+        ctx.metadata = parser[METADATA]
+#    if parser.has_key(DATA_TYPE):
+    if DATA_TYPE in parser:
+        db = _parse_data_type(parser[DATA_TYPE], db, ctx)
+#    if parser.has_key(NODE_TYPE):
+    if NODE_TYPE in parser:
+        db = _parse_node_type(parser[NODE_TYPE], db, ctx)
+#    if parser.has_key(TOPOLOGY):
+    if TOPOLOGY in parser:
+        db = _parse_topology_template(parser[TOPOLOGY], db, ctx)
+#    if parser.has_key(CAPABILITY_TYPE):
+    if CAPABILITY_TYPE in parser:
+        db = _parse_capability_type(parser[CAPABILITY_TYPE], db, ctx)
+#    if parser.has_key(RELATIONSHIP_TYPE):
+    if RELATIONSHIP_TYPE in parser:
+        db = _parse_relationship_type(parser[RELATIONSHIP_TYPE], db, ctx)
+    
+    db._parse_objects()
+    
+    logging.debug( 'File '+ filename+ ' imported!')
+    return db
+
+def _yaml_str_import(yml_str, db=None, ctx=None):
+    parser = simple_parse(yml_str)
+    
+    if ctx is None:
+        ctx = import_context()
+
+    ctx.extra_imports = []
+    
+#    if parser.has_key(IMPORT):
+    if IMPORT in parser:
+        db = _parse_import([], parser[IMPORT], db, ctx)
+#    if parser.has_key(METADATA):
+    if METADATA in parser:
+        ctx.metadata = parser[METADATA]
+#    if parser.has_key(DATA_TYPE):
+    if DATA_TYPE in parser:
+        db = _parse_data_type(parser[DATA_TYPE], db, ctx)
+#    if parser.has_key(NODE_TYPE):
+    if NODE_TYPE in parser:
+        db = _parse_node_type(parser[NODE_TYPE], db, ctx)
+#    if parser.has_key(TOPOLOGY):
+    if TOPOLOGY in parser:
+        db = _parse_topology_template(parser[TOPOLOGY], db, ctx)
+#    if parser.has_key(CAPABILITY_TYPE):
+    if CAPABILITY_TYPE in parser:
+        db = _parse_capability_type(parser[CAPABILITY_TYPE], db, ctx)
+#    if parser.has_key(RELATIONSHIP_TYPE):
+    if RELATIONSHIP_TYPE in parser:
+        db = _parse_relationship_type(parser[RELATIONSHIP_TYPE], db, ctx)
+    
+    db._parse_objects()
+    
+    return db
+
+def _parse_data_type(data_type_section, db, ctx):
+    if data_type_section is None:
+        return db
+    if db is None: 
+        db = ToscaDB()
+        
+    for data_type_name in data_type_section.keys():
+        db._import_data_type(DataType(data_type_name, data_type_section[data_type_name]))
+    return db
+
+def _parse_node_type(node_type_section, db, ctx):    
+    if node_type_section is None:
+        return db
+    if db is None:
+        db = ToscaDB()
+            
+    for node_type_def_name in node_type_section.keys():
+        db._import_node_type(NodeType(node_type_def_name, node_type_section[node_type_def_name]))
+    return db
+
+def _parse_capability_type(cap_type_section, db, ctx):    
+    if cap_type_section is None:
+        return db
+    if db is None:
+        db = ToscaDB()
+            
+    for cap_type_def_name in cap_type_section.keys():
+        db._import_capability_type(CapabilityType(cap_type_def_name, cap_type_section[cap_type_def_name]))
+    return db
+
+def _parse_relationship_type(rel_type_section, db, ctx):    
+    if rel_type_section is None:
+        return db
+    if db is None:
+        db = ToscaDB()
+            
+    for rel_type_def_name in rel_type_section.keys():
+        db._import_relationship_type(RelationshipType(rel_type_def_name,rel_type_section[rel_type_def_name]))
+    return db
+
+def _parse_topology_template(topology_section, db, ctx):    
+    if topology_section is None:
+        return db
+    if db is None:
+        db = ToscaDB()
+        
+    if ctx.metadata is None or ctx.metadata['template_name'] is None or ctx.metadata['template_name']=='':
+        template_key = ctx.curr_file_name
+    else:
+        template_key = ctx.metadata['template_name']
+        
+    if template_key is None or template_key == '':
+        index = 0
+        while True:
+#            if db.TEMPLATES.has_key('template'+str(index)):
+            if 'template'+str(index) in db.TEMPLATES:
+                index+=1
+                continue
+            break
+        template_key = 'template'+str(index)
+        
+    ctx.temp_name = template_key
+    
+    new_topology = ToscaTopology(template_key, ctx.metadata, topology_section)
+    new_topology.extra_imports = ctx.extra_imports
+    db._import_template(new_topology)
+            
+    return db
+
+def _parse_requirement_name_and_value(content):
+    list_size = len(content.keys())
+    if list_size != 1:
+        logging.warning( 'Requirement section does not have exact one element: '+ list_size)
+        return
+    ck = list(content.keys())[0]
+    return ck, content[ck]        
+        
+def _parse_import(file_imported, import_section, db, ctx):
+    if db is None:
+        db = ToscaDB()
+        
+    if import_section is None:
+        return db
+    
+    for new_file_sec in import_section:
+#        for new_file in new_file_sec.itervalues():
+        for new_file in iter(new_file_sec.values()):
+            curr_path_bk = ctx.curr_path
+            curr_filename_bk = ctx.curr_file_name
+            _file_import(file_imported, new_file, db, ctx)
+            ctx.curr_path = curr_path_bk
+            ctx.curr_file_name = curr_filename_bk
+        
+    return db
diff --git a/app/toscalib/utils/tosca_import.pyc b/app/toscalib/utils/tosca_import.pyc
new file mode 100644
index 0000000..b86dfa7
--- /dev/null
+++ b/app/toscalib/utils/tosca_import.pyc
diff --git a/app/toscalib/utils/tosca_operate.py b/app/toscalib/utils/tosca_operate.py
new file mode 100644
index 0000000..bc67310
--- /dev/null
+++ b/app/toscalib/utils/tosca_operate.py
@@ -0,0 +1,94 @@
+#Author: Shu Shi
+#emaiL: shushi@research.att.com
+
+
+from toscalib.templates.node import Node
+import copy, logging
+#from __builtin__ import False
+
+def _create_new_node(template, type_name, node_name = None):
+    db = template.db
+#    if db.NODE_TYPES.has_key(type_name) is False:
+    if type_name not in db.NODE_TYPES:
+        new_name = 'unknown_'+ str(template.node_index)
+        template.node_index = template.node_index + 1
+        new_node = Node(template, new_name, None)
+        logging.debug( 'New node: '+ new_name+ ' added')
+        return new_node
+    
+    if node_name is None:
+        new_name = _get_basename(db.NODE_TYPES[type_name].name) + '_' + str(template.node_index)
+        template.node_index = template.node_index + 1
+    else:
+        new_name = node_name
+         
+    new_node = Node(template, new_name, db.NODE_TYPES[type_name])
+
+    template._add_node(new_node)    
+    
+    logging.debug( 'New node: '+ new_name+ ' added')
+    return new_node
+    
+
+def _create_new_template(template, type_name, prefix_name = None):
+    db = template.db
+    if prefix_name is None:
+        prefix = db.TEMPLATES[type_name].name + '_' + str(template.temp_index) + '_'
+        template.temp_index = template.temp_index + 1
+    elif prefix_name == 'NO_PREFIX':
+        prefix = ''
+    else:
+        prefix = prefix_name
+    
+    new_temp = copy.deepcopy(db.TEMPLATES[type_name])
+    new_temp._update_prefix(prefix)
+    template.inputs.update(new_temp.inputs)
+    template.outputs.update(new_temp.outputs)
+    template.node_dict.update(new_temp.node_dict)
+    return template
+
+def _assign_property_value(node, property_name, value):
+#    if node.properties.has_key(property_name) is False:
+    if property_name not in node.properties:
+        logging.warning( 'No property with name '+ property_name+ ' in the node '+ node.name)
+        return False
+    return node.properties[property_name]._assign(value)
+
+def _assign_capability_property_value(node, cap_name, prop_name, value):
+#    if node.capabilities.has_key(cap_name) is False:
+    if cap_name not in node.capabilities:
+        logging.warning( 'No capability with name '+ cap_name+ ' in the node '+ node.name)
+        return False
+    cap_item = node.capabilities[cap_name]
+#    if cap_item.properties.has_key(prop_name) is False:
+    if prop_name not in cap_item.properties:
+        logging.warning( 'No propoerty with name'+ prop_name+ ' in the node '+ node.name+ ' capability '+ cap_name)
+        return False
+    return cap_item.properties[prop_name]._assign(value)
+
+def _assign_requirement_value(node, requirement_name, value):
+
+    requirement_found = False
+    for req in node.requirements:
+        if req.name == requirement_name:
+            requirement_found = req
+            break
+    if requirement_found is False:
+        logging.warning( 'No requirement with name '+ requirement_name+ ' in the node '+ node.name)
+        return False
+    if isinstance(value, Node) is False:
+        logging.warning( 'Node value should be passed to requirement assignment')
+        return False
+    else:
+        if requirement_found._verify_node(value):
+            requirement_found._assign(value)
+        else:
+            logging.warning( 'Invalid requirement fulfillment for node '+ node.name+ '->'+ requirement_name)
+ 
+    
+    return True
+ 
+def _get_basename(name):
+    names = name.split(".")
+    return names[len(names)-1]       
+    
\ No newline at end of file
diff --git a/app/toscalib/utils/tosca_operate.pyc b/app/toscalib/utils/tosca_operate.pyc
new file mode 100644
index 0000000..4ebd264
--- /dev/null
+++ b/app/toscalib/utils/tosca_operate.pyc
diff --git a/app/toscalib/utils/tosca_print.py b/app/toscalib/utils/tosca_print.py
new file mode 100644
index 0000000..a7205e3
--- /dev/null
+++ b/app/toscalib/utils/tosca_print.py
@@ -0,0 +1,58 @@
+#Author: Shu Shi
+#emaiL: shushi@research.att.com
+
+
+LEVEL_NODE_NAME = 1
+LEVEL_NODE_DETAILS = 2
+LEVEL_NODE_EVERYTHING = 3
+
+def _print_template(template, level=LEVEL_NODE_DETAILS):
+    print_str = ''
+    if template is None: 
+        return print_str
+    print_str += 'Nodes:'+ '\n'
+    for node in iter(template.node_dict.values()):
+        print_str += _print_node(node, level)
+    return print_str
+ 
+def _print_node(node, level):
+    print_str = ''
+    if node is None:
+        return
+    print_str +=  ' '+ node.name + '\n'
+    print_str +=   '    type: '+ node.type+ '\n'
+    if level == LEVEL_NODE_DETAILS:
+        if len(node.properties) > 0:
+            print_str +=   '    properties:' + '\n'
+        for prop in iter(node.properties.values()):
+            if prop.filled:
+                print_str +=   '     '+ prop.name+ ': '+ str(prop.value._get_value()[0])+ '\n'
+            else:
+                print_str +=   '     '+ prop.name+ ': null'+ '\n'
+        if len(node.requirements)> 0:
+            print_str +=   '    requirements:'+ '\n'
+        for req in node.requirements:
+            if req.filled:
+                print_str +=   '     '+ req.name+ ': '+ req.value.name+ '\n'
+            else:
+                print_str +=   '     '+ req.name+ ': null'+ '\n'
+        print_str +=   ''+ '\n'
+    return print_str
+    
+
+def _print_node_types(db):
+    print_str =  'Available node types: '+ '\n'
+    for name in db.NODE_TYPES.keys():
+        print_str +=   name, '\n'
+    return print_str
+
+def _print_templates(db):
+    print_str =   'Available templates: '+ '\n'
+    for name in db.TEMPLATES.keys():
+        print_str +=   name, '\n'
+    return print_str
+
+def _print_node_type(node_type):
+    print_str =   'Node Type Definition: '+ node_type.name+ '\n'
+    print_str +=   node_type.raw_content+ '\n'
+    return print_str
diff --git a/app/toscalib/utils/tosca_print.pyc b/app/toscalib/utils/tosca_print.pyc
new file mode 100644
index 0000000..7c39616
--- /dev/null
+++ b/app/toscalib/utils/tosca_print.pyc
diff --git a/app/toscalib/utils/validateutils.py b/app/toscalib/utils/validateutils.py
new file mode 100644
index 0000000..dca08b1
--- /dev/null
+++ b/app/toscalib/utils/validateutils.py
@@ -0,0 +1,81 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import collections
+import dateutil.parser
+import numbers
+
+import six
+
+#from toscalib.utils.gettextutils import _
+
+
+def str_to_num(value):
+    '''Convert a string representation of a number into a numeric type.'''
+    if isinstance(value, numbers.Number):
+        return value
+    try:
+        return int(value)
+    except ValueError:
+        return float(value)
+
+
+def validate_number(value):
+    return str_to_num(value)
+
+
+def validate_integer(value):
+    if not isinstance(value, int):
+        try:
+            value = int(value)
+        except Exception:
+            raise ValueError(_('"%s" is not an integer') % value)
+    return value
+
+
+def validate_float(value):
+    if not isinstance(value, float):
+        raise ValueError(_('"%s" is not a float') % value)
+    return validate_number(value)
+
+
+def validate_string(value):
+    if not isinstance(value, six.string_types):
+        raise ValueError(_('"%s" is not a string') % value)
+    return value
+
+
+def validate_list(value):
+    if not isinstance(value, list):
+        raise ValueError(_('"%s" is not a list') % value)
+    return value
+
+
+def validate_map(value):
+    if not isinstance(value, collections.Mapping):
+        raise ValueError(_('"%s" is not a map') % value)
+    return value
+
+
+def validate_boolean(value):
+    if isinstance(value, bool):
+        return value
+
+    if isinstance(value, str):
+        normalised = value.lower()
+        if normalised in ['true', 'false']:
+            return normalised == 'true'
+    raise ValueError(_('"%s" is not a boolean') % value)
+
+
+def validate_timestamp(value):
+    return dateutil.parser.parse(value)
diff --git a/app/toscalib/utils/yamlparser.py b/app/toscalib/utils/yamlparser.py
new file mode 100644
index 0000000..e54227d
--- /dev/null
+++ b/app/toscalib/utils/yamlparser.py
@@ -0,0 +1,63 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+import codecs
+from collections import OrderedDict
+
+import yaml
+
+
+if hasattr(yaml, 'CSafeLoader'):
+    yaml_loader = yaml.CSafeLoader
+else:
+    yaml_loader = yaml.SafeLoader
+
+
+def load_yaml(path):
+    with codecs.open(path, encoding='utf-8', errors='strict') as f:
+        return yaml.load(f.read(), Loader=yaml_loader)
+
+
+def simple_parse(tmpl_str):
+    try:
+        tpl = yaml.load(tmpl_str, Loader=yaml_loader)
+    except yaml.YAMLError as yea:
+        raise ValueError(yea)
+    else:
+        if tpl is None:
+            tpl = {}
+    return tpl
+
+
+def ordered_load(stream, Loader=yaml.Loader, object_pairs_hook=OrderedDict):
+    class OrderedLoader(Loader):
+        pass
+
+    def construct_mapping(loader, node):
+        loader.flatten_mapping(node)
+        return object_pairs_hook(loader.construct_pairs(node))
+
+    OrderedLoader.add_constructor(
+        yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG,
+        construct_mapping)
+    return yaml.load(stream, OrderedLoader)
+
+
+def simple_ordered_parse(tmpl_str):
+    try:
+        tpl = ordered_load(tmpl_str)
+    except yaml.YAMLError as yea:
+        raise ValueError(yea)
+    else:
+        if tpl is None:
+            tpl = {}
+    return tpl
diff --git a/app/toscalib/utils/yamlparser.pyc b/app/toscalib/utils/yamlparser.pyc
new file mode 100644
index 0000000..8d97b2a
--- /dev/null
+++ b/app/toscalib/utils/yamlparser.pyc