diff --git a/.idea/cmem-plugin-base.iml b/.idea/cmem-plugin-base.iml
index 5ba7e2f..759b1b2 100644
--- a/.idea/cmem-plugin-base.iml
+++ b/.idea/cmem-plugin-base.iml
@@ -5,7 +5,7 @@
       <sourceFolder url="file://$MODULE_DIR$/cmem_plugin_base" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/tests" isTestSource="true" />
     </content>
-    <orderEntry type="jdk" jdkName="Poetry (cmem-plugin-base) (2)" jdkType="Python SDK" />
+    <orderEntry type="jdk" jdkName="Python 3.11 (cmem-plugin-base)" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
   <component name="PyDocumentationSettings">
diff --git a/.python-version b/.python-version
new file mode 100644
index 0000000..371cfe3
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+3.11.1
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5e4d1e3..2679539 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](http://keepachangelog.com/) and this project adheres to [Semantic Versioning](https://semver.org/)
 
+## [Unreleased]
+
+### Added
+
+- add util method to generate entities from python dict | list object
+
+
 ## [4.4.0] 2023-11-24
 
 ### Added
diff --git a/cmem_plugin_base/dataintegration/entity.py b/cmem_plugin_base/dataintegration/entity.py
index fcde0a2..256d96a 100644
--- a/cmem_plugin_base/dataintegration/entity.py
+++ b/cmem_plugin_base/dataintegration/entity.py
@@ -19,6 +19,19 @@ def __init__(self, path: str,
         self.is_relation = is_relation
         self.is_single_value = is_single_value
 
+    def __repr__(self):
+        obj = {
+            'path': self.path, 'is_relation': self.is_relation,
+            'is_single_value': self.is_single_value
+        }
+        return f"EntityPath({obj})"
+
+    def __eq__(self, other):
+        return (isinstance(other, EntityPath)
+                and self.path == other.path
+                and self.is_relation == other.is_relation
+                and self.is_single_value == other.is_single_value)
+
 
 class EntitySchema:
     """An entity schema.
@@ -40,6 +53,20 @@ def __init__(self,
         self.path_to_root = path_to_root
         self.sub_schemata = sub_schemata
 
+    def __repr__(self):
+        obj = {
+            "type_uri": self.type_uri, "paths": self.paths,
+            "path_to_root": self.path_to_root
+        }
+        return f"EntitySchema({obj})"
+
+    def __eq__(self, other):
+        return (isinstance(other, EntitySchema)
+                and self.type_uri == other.type_uri
+                and self.paths == other.paths
+                and self.path_to_root == other.path_to_root
+                and self.sub_schemata == other.sub_schemata)
+
 
 class Entity:
     """An Entity can represent an instance of any given concept.
diff --git a/cmem_plugin_base/dataintegration/utils.py b/cmem_plugin_base/dataintegration/utils/__init__.py
similarity index 97%
rename from cmem_plugin_base/dataintegration/utils.py
rename to cmem_plugin_base/dataintegration/utils/__init__.py
index fef30b3..0ce80e5 100644
--- a/cmem_plugin_base/dataintegration/utils.py
+++ b/cmem_plugin_base/dataintegration/utils/__init__.py
@@ -71,7 +71,7 @@ def split_task_id(task_id: str) -> tuple:
 
 
 def write_to_dataset(
-    dataset_id: str, file_resource=None, context: Optional[UserContext] = None
+        dataset_id: str, file_resource=None, context: Optional[UserContext] = None
 ):
     """Write to a dataset.
 
diff --git a/cmem_plugin_base/dataintegration/utils/entity_builder.py b/cmem_plugin_base/dataintegration/utils/entity_builder.py
new file mode 100644
index 0000000..b830f22
--- /dev/null
+++ b/cmem_plugin_base/dataintegration/utils/entity_builder.py
@@ -0,0 +1,213 @@
+"""utils module for building entities from python objects dict|list."""
+from typing import Optional, Union
+
+from ulid import ULID
+
+from cmem_plugin_base.dataintegration.entity import (
+    Entities, Entity, EntityPath
+)
+from cmem_plugin_base.dataintegration.entity import EntitySchema
+
+
+def merge_path_values(paths_map1, paths_map2):
+    """
+    Merge two dictionaries representing paths and values.
+
+    This function takes two dictionaries, `paths_map1` and `paths_map2`,
+    each representing paths and corresponding values. It merges these dictionaries
+    by combining values for common paths and returns the merged dictionary.
+
+    Args:
+        paths_map1 (dict): The first dictionary containing paths and values.
+        paths_map2 (dict): The second dictionary containing paths and values.
+
+    Returns:
+        dict: A merged dictionary containing combined values for common paths.
+    """
+    for key, value in paths_map2.items():
+        current_path_map = {}
+        if paths_map1.get(key) is not None:
+            current_path_map = paths_map1[key]
+        current_path_map = current_path_map | value
+        paths_map1[key] = current_path_map
+    return paths_map1
+
+
+def generate_paths_from_data(data, path='root'):
+    """
+    Generate a dictionary representing paths and data types from a nested JSON
+    structure.
+
+    This function recursively traverses a nested JSON structure ('data') and builds
+    a dictionary ('paths_map') where keys are paths and values are dictionaries
+    containing keys and their corresponding data types.
+
+    Args:
+        data (dict or list): The nested JSON structure to traverse.
+        path (str, optional): The current path (used for recursion). Default is 'root'.
+
+    Returns:
+        dict: A dictionary representing paths and data types.
+    """
+    paths_map = {}
+    if isinstance(data, list):
+        for _ in data:
+            paths_map = merge_path_values(paths_map,
+                                          generate_paths_from_data(_, path=path))
+    if isinstance(data, dict):
+        key_to_type_map = {}
+        for key, value in data.items():
+            key_to_type_map[key] = type(value).__name__
+            if key_to_type_map[key] == 'dict':
+                sub_path = f"{path}/{key}"
+                paths_map = merge_path_values(paths_map,
+                                              generate_paths_from_data(data=value,
+                                                                       path=sub_path))
+            if key_to_type_map[key] == 'list':
+                for _ in value:
+                    if isinstance(_, dict):
+                        key_to_type_map[key] = 'list_dict'
+                        sub_path = f"{path}/{key}"
+                        paths_map = merge_path_values(paths_map,
+                                                      generate_paths_from_data(
+                                                          data=_,
+                                                          path=sub_path))
+        paths_map[path] = key_to_type_map
+    return paths_map
+
+
+def _get_schema(data: Union[dict, list]):
+    """Get the schema of an entity."""
+    if not data:
+        return None
+    paths_map = generate_paths_from_data(data=data)
+    path_to_schema_map = {}
+    for path, key_to_type_map in paths_map.items():
+        schema_paths = []
+        for _key, _type in key_to_type_map.items():
+            schema_paths.append(
+                EntityPath(
+                    path=_key,
+                    is_relation=_type in ('dict', 'list_dict'),
+                    is_single_value=_type not in ('list', 'list_dict')
+                )
+            )
+        schema = EntitySchema(
+            type_uri="",
+            paths=schema_paths,
+        )
+        path_to_schema_map[path] = schema
+    return path_to_schema_map
+
+
+def extend_path_list(path_to_entities, sub_path_to_entities):
+    """
+    Extend a dictionary of paths to entities by merging with another.
+
+    This function takes two dictionaries, `path_to_entities` and `sub_path_to_entities`,
+    representing paths and lists of entities. It extends the lists of entities for each
+    path in `path_to_entities` by combining them with corresponding lists in
+    `sub_path_to_entities`.
+
+    Args:
+        path_to_entities (dict): The main dictionary of paths to entities.
+        sub_path_to_entities (dict): The dictionary of additional paths to entities.
+
+    Returns:
+        None: The result is modified in-place. `path_to_entities` is extended with
+        entities from `sub_path_to_entities`.
+    """
+    for key, sub_entities in sub_path_to_entities.items():
+        entities = path_to_entities.get(key, [])
+        entities.extend(sub_entities)
+        path_to_entities[key] = entities
+
+
+def _get_entity(
+        path_from_root,
+        path_to_schema_map,
+        data,
+):
+    """Get an entity based on the schema and data."""
+    path_to_entities = {}
+    entity_uri = f"urn:x-ulid:{ULID()}"
+    values = []
+    schema = path_to_schema_map[path_from_root]
+    for _ in schema.paths:
+        if data.get(_.path) is None:
+            values.append([''])
+        elif not _.is_relation:
+            values.append(
+                [f"{data.get(_.path)}"]
+                if _.is_single_value
+                else
+                [f"{_v}" for _v in data.get(_.path)]
+            )
+        else:
+            _data = [data.get(_.path)] if _.is_single_value else data.get(_.path)
+            sub_entities_uri = []
+            for _v in _data:
+                sub_entity_path = f"{path_from_root}/{_.path}"
+                sub_path_to_entities = _get_entity(
+                    path_from_root=sub_entity_path,
+                    path_to_schema_map=path_to_schema_map,
+                    data=_v,
+                )
+                sub_entity = sub_path_to_entities[sub_entity_path].pop()
+                sub_entities_uri.append(sub_entity.uri)
+                sub_path_to_entities[sub_entity_path].append(sub_entity)
+                extend_path_list(path_to_entities, sub_path_to_entities)
+            values.append(sub_entities_uri)
+    entity = Entity(uri=entity_uri, values=values)
+    entities = path_to_entities.get(path_from_root, [])
+    entities.append(entity)
+    path_to_entities[path_from_root] = entities
+    return path_to_entities
+
+
+def _get_entities(
+        data: Union[dict, list],
+        path_to_schema_map: dict[str, EntitySchema],
+) -> dict[str, list[Entity]]:
+    """
+    Get entities based on the schema, data, and sub-entities.
+    """
+    path_to_entities: dict[str, list[Entity]] = {}
+    if isinstance(data, list):
+        for _ in data:
+            sub_path_to_entities = _get_entity(
+                path_from_root="root",
+                path_to_schema_map=path_to_schema_map,
+                data=_
+            )
+            extend_path_list(path_to_entities, sub_path_to_entities)
+    else:
+        path_to_entities = _get_entity(
+            path_from_root="root",
+            path_to_schema_map=path_to_schema_map,
+            data=data,
+        )
+    return path_to_entities
+
+
+def build_entities_from_data(data: Union[dict, list]) -> Optional[Entities]:
+    """
+    Get entities from a data object.
+    """
+    path_to_schema_map = _get_schema(data)
+    if not path_to_schema_map:
+        return None
+    path_to_entities = _get_entities(
+        data=data,
+        path_to_schema_map=path_to_schema_map,
+    )
+    return Entities(
+        entities=iter(path_to_entities.get('root')),  # type: ignore[arg-type]
+        schema=path_to_schema_map['root'],
+        sub_entities=[
+            Entities(
+                entities=iter(value),
+                schema=path_to_schema_map[key]
+            ) for key, value in path_to_entities.items() if key != 'root'
+        ]
+    )
diff --git a/poetry.lock b/poetry.lock
index dd4aa52..39fdcdb 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -425,15 +425,34 @@ test = ["black", "coverage[toml]", "ddt (>=1.1.1,!=1.4.3)", "mock", "mypy", "pre
 
 [[package]]
 name = "idna"
-version = "3.4"
+version = "3.6"
 description = "Internationalized Domain Names in Applications (IDNA)"
 optional = false
 python-versions = ">=3.5"
 files = [
-    {file = "idna-3.4-py3-none-any.whl", hash = "sha256:90b77e79eaa3eba6de819a0c442c0b4ceefc341a7a2ab77d7562bf49f425c5c2"},
-    {file = "idna-3.4.tar.gz", hash = "sha256:814f528e8dead7d329833b91c5faa87d60bf71824cd12a7530b5526063d02cb4"},
+    {file = "idna-3.6-py3-none-any.whl", hash = "sha256:c05567e9c24a6b9faaa835c4821bad0590fbb9d5779e7caa6e1cc4978e7eb24f"},
+    {file = "idna-3.6.tar.gz", hash = "sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca"},
 ]
 
+[[package]]
+name = "importlib-metadata"
+version = "7.0.0"
+description = "Read metadata from Python packages"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "importlib_metadata-7.0.0-py3-none-any.whl", hash = "sha256:d97503976bb81f40a193d41ee6570868479c69d5068651eb039c40d850c59d67"},
+    {file = "importlib_metadata-7.0.0.tar.gz", hash = "sha256:7fc841f8b8332803464e5dc1c63a2e59121f46ca186c0e2e182e80bf8c1319f7"},
+]
+
+[package.dependencies]
+zipp = ">=0.5"
+
+[package.extras]
+docs = ["furo", "jaraco.packaging (>=9.3)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (<7.2.5)", "sphinx (>=3.5)", "sphinx-lint"]
+perf = ["ipython"]
+testing = ["flufl.flake8", "importlib-resources (>=1.3)", "packaging", "pyfakefs", "pytest (>=6)", "pytest-black (>=0.3.7)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=2.2)", "pytest-mypy (>=0.9.1)", "pytest-perf (>=0.9.2)", "pytest-ruff"]
+
 [[package]]
 name = "iniconfig"
 version = "2.0.0"
@@ -566,6 +585,26 @@ files = [
     {file = "lazy_object_proxy-1.9.0-cp39-cp39-win_amd64.whl", hash = "sha256:db1c1722726f47e10e0b5fdbf15ac3b8adb58c091d12b3ab713965795036985f"},
 ]
 
+[[package]]
+name = "linkify-it-py"
+version = "2.0.2"
+description = "Links recognition library with FULL unicode support."
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "linkify-it-py-2.0.2.tar.gz", hash = "sha256:19f3060727842c254c808e99d465c80c49d2c7306788140987a1a7a29b0d6ad2"},
+    {file = "linkify_it_py-2.0.2-py3-none-any.whl", hash = "sha256:a3a24428f6c96f27370d7fe61d2ac0be09017be5190d68d8658233171f1b6541"},
+]
+
+[package.dependencies]
+uc-micro-py = "*"
+
+[package.extras]
+benchmark = ["pytest", "pytest-benchmark"]
+dev = ["black", "flake8", "isort", "pre-commit", "pyproject-flake8"]
+doc = ["myst-parser", "sphinx", "sphinx-book-theme"]
+test = ["coverage", "pytest", "pytest-cov"]
+
 [[package]]
 name = "markdown-it-py"
 version = "3.0.0"
@@ -578,6 +617,8 @@ files = [
 ]
 
 [package.dependencies]
+linkify-it-py = {version = ">=1,<3", optional = true, markers = "extra == \"linkify\""}
+mdit-py-plugins = {version = "*", optional = true, markers = "extra == \"plugins\""}
 mdurl = ">=0.1,<1.0"
 
 [package.extras]
@@ -660,6 +701,25 @@ files = [
     {file = "mccabe-0.7.0.tar.gz", hash = "sha256:348e0240c33b60bbdf4e523192ef919f28cb2c3d7d5c7794f74009290f236325"},
 ]
 
+[[package]]
+name = "mdit-py-plugins"
+version = "0.4.0"
+description = "Collection of plugins for markdown-it-py"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "mdit_py_plugins-0.4.0-py3-none-any.whl", hash = "sha256:b51b3bb70691f57f974e257e367107857a93b36f322a9e6d44ca5bf28ec2def9"},
+    {file = "mdit_py_plugins-0.4.0.tar.gz", hash = "sha256:d8ab27e9aed6c38aa716819fedfde15ca275715955f8a185a8e1cf90fb1d2c1b"},
+]
+
+[package.dependencies]
+markdown-it-py = ">=1.0.0,<4.0.0"
+
+[package.extras]
+code-style = ["pre-commit"]
+rtd = ["myst-parser", "sphinx-book-theme"]
+testing = ["coverage", "pytest", "pytest-cov", "pytest-regressions"]
+
 [[package]]
 name = "mdurl"
 version = "0.1.2"
@@ -673,58 +733,59 @@ files = [
 
 [[package]]
 name = "memray"
-version = "1.10.0"
+version = "1.11.0"
 description = "A memory profiler for Python applications"
 optional = false
 python-versions = ">=3.7.0"
 files = [
-    {file = "memray-1.10.0-cp310-cp310-macosx_10_14_x86_64.whl", hash = "sha256:843a688877691746f9d1835cfa8a65139948471bdd78720435808d20bc30a1cc"},
-    {file = "memray-1.10.0-cp310-cp310-macosx_11_0_arm64.whl", hash = "sha256:6937d7ef67d18ccc01c3250cdf3b4ef1445b859ee8756f09e3d11bd3ff0c7d67"},
-    {file = "memray-1.10.0-cp310-cp310-manylinux_2_12_i686.manylinux2010_i686.whl", hash = "sha256:23e8c402625cfb32d0e9edb5ec0945f3e5e54bc6b0c5699f6284302082b80bd4"},
-    {file = "memray-1.10.0-cp310-cp310-manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:f16c5c8730b616613dc8bafe32649ca6bd7252606251eb00148582011758d0b5"},
-    {file = "memray-1.10.0-cp310-cp310-manylinux_2_17_aarch64.manylinux2014_aarch64.whl", hash = "sha256:c7aeb47174c42e99740a8e2b3b6fe0932c95d987258d48a746974ead19176c26"},
-    {file = "memray-1.10.0-cp310-cp310-musllinux_1_1_x86_64.whl", hash = "sha256:2ce59ef485db3634de98b3a026d2450fc0a875e3a58a9ea85f7a89098841defe"},
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 [package.dependencies]
 jinja2 = ">=2.9"
 rich = ">=11.2.0"
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 [package.extras]
 benchmark = ["asv"]
-dev = ["Cython", "IPython", "asv", "black", "bump2version", "check-manifest", "flake8", "furo", "greenlet", "ipython", "isort", "mypy", "pytest", "pytest-cov", "setuptools", "sphinx", "sphinx-argparse", "towncrier"]
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 lint = ["black", "check-manifest", "flake8", "isort", "mypy"]
-test = ["Cython", "greenlet", "ipython", "pytest", "pytest-cov", "setuptools"]
+test = ["Cython", "greenlet", "ipython", "pytest", "pytest-cov", "pytest-textual-snapshot", "setuptools"]
 
 [[package]]
 name = "mypy"
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@@ -908,13 +957,13 @@ files = [
 
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+[[package]]
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 pbr = ">=2.0.0,<2.1.0 || >2.1.0"
 
+[[package]]
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+python-versions = ">=3.8,<4.0"
+files = [
+    {file = "textual-0.44.1-py3-none-any.whl", hash = "sha256:19cfd3a0c623bff02cc80d872ba3e93e1a5b77289fecf74c16ffcfa7407b49a1"},
+    {file = "textual-0.44.1.tar.gz", hash = "sha256:7a45b85943957095b97d0a90c4fa4d3e1028fa26493c0720f403d879157a6589"},
+]
+
+[package.dependencies]
+importlib-metadata = ">=4.11.3"
+markdown-it-py = {version = ">=2.1.0", extras = ["linkify", "plugins"]}
+rich = ">=13.3.3"
+typing-extensions = ">=4.4.0,<5.0.0"
+
+[package.extras]
+syntax = ["tree-sitter (>=0.20.1,<0.21.0)", "tree_sitter_languages (>=1.7.0)"]
+
 [[package]]
 name = "tomlkit"
 version = "0.12.3"
@@ -1362,6 +1442,20 @@ files = [
     {file = "typing_extensions-4.8.0.tar.gz", hash = "sha256:df8e4339e9cb77357558cbdbceca33c303714cf861d1eef15e1070055ae8b7ef"},
 ]
 
+[[package]]
+name = "uc-micro-py"
+version = "1.0.2"
+description = "Micro subset of unicode data files for linkify-it-py projects."
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "uc-micro-py-1.0.2.tar.gz", hash = "sha256:30ae2ac9c49f39ac6dce743bd187fcd2b574b16ca095fa74cd9396795c954c54"},
+    {file = "uc_micro_py-1.0.2-py3-none-any.whl", hash = "sha256:8c9110c309db9d9e87302e2f4ad2c3152770930d88ab385cd544e7a7e75f3de0"},
+]
+
+[package.extras]
+test = ["coverage", "pytest", "pytest-cov"]
+
 [[package]]
 name = "urllib3"
 version = "2.1.0"
@@ -1471,7 +1565,22 @@ files = [
     {file = "wrapt-1.16.0.tar.gz", hash = "sha256:5f370f952971e7d17c7d1ead40e49f32345a7f7a5373571ef44d800d06b1899d"},
 ]
 
+[[package]]
+name = "zipp"
+version = "3.17.0"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "zipp-3.17.0-py3-none-any.whl", hash = "sha256:0e923e726174922dce09c53c59ad483ff7bbb8e572e00c7f7c46b88556409f31"},
+    {file = "zipp-3.17.0.tar.gz", hash = "sha256:84e64a1c28cf7e91ed2078bb8cc8c259cb19b76942096c8d7b84947690cabaf0"},
+]
+
+[package.extras]
+docs = ["furo", "jaraco.packaging (>=9.3)", "jaraco.tidelift (>=1.4)", "rst.linker (>=1.9)", "sphinx (<7.2.5)", "sphinx (>=3.5)", "sphinx-lint"]
+testing = ["big-O", "jaraco.functools", "jaraco.itertools", "more-itertools", "pytest (>=6)", "pytest-black (>=0.3.7)", "pytest-checkdocs (>=2.4)", "pytest-cov", "pytest-enabler (>=2.2)", "pytest-ignore-flaky", "pytest-mypy (>=0.9.1)", "pytest-ruff"]
+
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11"
-content-hash = "736c8e7226e1adb41e86572ccf10e7030fb9f58837c523cc33ba63f09729c991"
+content-hash = "e6a5dcc43b6248d8cf2ba91e3f8131d17596fb1df989cf16cc4129749a706549"
diff --git a/pyproject.toml b/pyproject.toml
index 77b81a3..4d7b7d9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,6 +21,7 @@ keywords = [
 [tool.poetry.dependencies]
 python = "^3.11"
 cmem-cmempy = ">=23.3.0"
+python-ulid = "^2.2.0"
 
 [tool.poetry.group.dev.dependencies]
 bandit = "^1.7.5"
@@ -31,8 +32,6 @@ defusedxml = "^0.7.1"
 flake8-formatter-junit-xml = "^0.0.6"
 genbadge = "^1.1.0"
 mypy = "^1.4.1"
-# https://github.com/smarie/python-genbadge/issues/31
-pillow = "9.5.0"
 # https://github.com/rasjani/pylint-junit/issues/1
 pylint = "^2"
 pylint-junit = "^0.3.2"
diff --git a/tests/test_utils_build_entities_from_data.py b/tests/test_utils_build_entities_from_data.py
new file mode 100644
index 0000000..c7b34d5
--- /dev/null
+++ b/tests/test_utils_build_entities_from_data.py
@@ -0,0 +1,219 @@
+"""Tests for `utils.build_entities_from_data`"""
+import json
+
+from cmem_plugin_base.dataintegration.entity import EntitySchema, EntityPath
+from cmem_plugin_base.dataintegration.utils.entity_builder import (
+    build_entities_from_data
+)
+
+
+def test_single_object():
+    """test generation of entities and schema for a simple JSON object."""
+    test_data = """
+{
+  "name": "sai",
+  "email": "saipraneeth@example.com"
+}"""
+    data = json.loads(test_data)
+    entities = build_entities_from_data(data)
+    assert len(list(entities.entities)) == 1
+    for _ in entities.entities:
+        assert len(_.values) == 2
+        assert _.values == [["sai"], ["saipraneeth@example.com"]]
+    assert len(entities.schema.paths) == 2
+    assert entities.schema == EntitySchema(
+        type_uri="",
+        paths=[
+            EntityPath("name", False, is_single_value=True),
+            EntityPath("email", False, is_single_value=True),
+        ]
+    )
+
+
+def test_single_object_one_level():
+    """test generation of entities and schema for a JSON object with one level of
+    hierarchy"""
+    test_data = """
+{
+  "name": "sai",
+  "email": "saipraneeth@example.com",
+  "city": {
+    "name": "San Francisco",
+    "country": "United States"
+  }
+}"""
+    data = json.loads(test_data)
+    entities = build_entities_from_data(data)
+    assert len(list(entities.entities)) == 1
+    for _ in entities.entities:
+        assert len(_.values) == 3
+        assert _.values[0:2] == [["sai"], ["saipraneeth@example.com"]]
+        assert _.values[2][0].startswith("urn:x-ulid:")
+    assert len(entities.schema.paths) == 3
+    assert entities.schema == EntitySchema(
+        type_uri="",
+        paths=[
+            EntityPath("name", False, is_single_value=True),
+            EntityPath("email", False, is_single_value=True),
+            EntityPath("city", True, is_single_value=True),
+        ]
+    )
+    # Validate sub entities
+    for _ in entities.sub_entities:
+        for _entity in _.entities:
+            assert len(_entity.values) == 2
+            assert _entity.values == [["San Francisco"], ["United States"]]
+        assert _.schema == EntitySchema(
+            type_uri="",
+            paths=[
+                EntityPath("name", False, is_single_value=True),
+                EntityPath("country", False, is_single_value=True)
+            ]
+        )
+
+
+def test_single_object_one_level_array():
+    """test generation of entities and schema for a JSON object with array object in
+     first level of hierarchy"""
+    test_data = """
+{
+  "name": "sai",
+  "email": "saipraneeth@example.com",
+  "city": [{
+    "name": "San Francisco",
+    "country": "United States"
+  },
+  {
+    "name": "New York",
+    "country": "United States"
+  }]
+}"""
+    data = json.loads(test_data)
+    entities = build_entities_from_data(data)
+    assert len(list(entities.entities)) == 1
+    for _ in entities.entities:
+        assert len(_.values) == 3
+        assert _.values[0:2] == [["sai"], ["saipraneeth@example.com"]]
+        assert _.values[2][0].startswith("urn:x-ulid:")
+    assert len(entities.schema.paths) == 3
+    assert entities.schema == EntitySchema(
+        type_uri="",
+        paths=[
+            EntityPath("name", False, is_single_value=True),
+            EntityPath("email", False, is_single_value=True),
+            EntityPath("city", True, is_single_value=False),
+        ]
+    )
+    # Validate sub entities
+    for _ in entities.sub_entities:
+        assert len(list(_.entities)) == 2
+        for _entity in _.entities:
+            assert len(_entity.values) == 2
+        assert _.schema == EntitySchema(
+            type_uri="",
+            paths=[
+                EntityPath("name", False, is_single_value=True),
+                EntityPath("country", False, is_single_value=True)
+            ]
+        )
+
+
+def test_single_object_two_level_array():
+    """test generation of entities and schema for a JSON object with two levels of
+    hierarchy"""
+    test_data = """
+{
+  "name": "sai",
+  "email": "saipraneeth@example.com",
+  "city": [
+    {
+      "name": "San Francisco",
+      "country": "United States",
+      "geo_location": {
+        "lat": "37.773972",
+        "long": "-122.431297"
+      }
+    },
+    {
+      "name": "New York",
+      "country": "United States",
+      "geo_location": {
+        "lat": "40.730610",
+        "long": "-73.935242"
+      }
+    }
+  ]
+}"""
+    data = json.loads(test_data)
+    entities = build_entities_from_data(data)
+    assert len(list(entities.entities)) == 1
+    for _ in entities.entities:
+        assert len(_.values) == 3
+        assert _.values[0:2] == [["sai"], ["saipraneeth@example.com"]]
+        assert _.values[2][0].startswith("urn:x-ulid:")
+    assert len(entities.schema.paths) == 3
+    assert entities.schema == EntitySchema(
+        type_uri="",
+        paths=[
+            EntityPath("name", False, is_single_value=True),
+            EntityPath("email", False, is_single_value=True),
+            EntityPath("city", True, is_single_value=False),
+        ]
+    )
+    # Validate sub entities
+    location_entities = entities.sub_entities[0]
+    city_entities = entities.sub_entities[1]
+    assert len(list(city_entities.entities)) == 2
+    assert len(list(location_entities.entities)) == 2
+
+    assert city_entities.schema == EntitySchema(
+            type_uri="",
+            paths=[
+                EntityPath("name", False, is_single_value=True),
+                EntityPath("country", False, is_single_value=True),
+                EntityPath("geo_location", True, is_single_value=True),
+            ]
+        )
+
+    assert location_entities.schema == EntitySchema(
+            type_uri="",
+            paths=[
+                EntityPath("lat", False, is_single_value=True),
+                EntityPath("long", False, is_single_value=True),
+            ]
+        )
+
+
+def test_array_object():
+    """test generation of entities and schema for a simple array JSON object."""
+    test_data = """
+[{
+  "name": "seebi"
+},
+{
+  "name": "sai",
+  "email": "saipraneeth@example.com"
+}]"""
+    data = json.loads(test_data)
+    entities = build_entities_from_data(data)
+    _ = next(entities.entities)
+    assert len(_.values) == 2
+    assert _.values == [["seebi"], [""]]
+    _ = next(entities.entities)
+    assert len(_.values) == 2
+    assert _.values == [["sai"], ["saipraneeth@example.com"]]
+    assert len(entities.schema.paths) == 2
+    assert entities.schema == EntitySchema(
+        type_uri="",
+        paths=[
+            EntityPath("name", False, is_single_value=True),
+            EntityPath("email", False, is_single_value=True),
+        ]
+    )
+
+
+def test_empty_object():
+    """test empty json object input"""
+    test_data = """[]"""
+    data = json.loads(test_data)
+    assert build_entities_from_data(data) is None