domain native and operational policies support

- moved DomainMaker to policy-utils/ project.
- support for native drools and controller drools policy types.

Issue-ID: POLICY-2345
Signed-off-by: jhh <jorge.hernandez-herrero@att.com>
Change-Id: I46b9816eadceb7ef280e0e6789f07b4d4ca51519
Signed-off-by: jhh <jorge.hernandez-herrero@att.com>

11 files changed, 735 insertions, 0 deletions

diff --git a/policy-utils/pom.xml b/policy-utils/pom.xml
index 1bc680ba..f7bbff67 100644
--- a/policy-utils/pom.xml
+++ b/policy-utils/pom.xml
@@ -42,6 +42,11 @@
             <scope>test</scope>
         </dependency>
         <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
             <groupId>org.onap.policy.common</groupId>
             <artifactId>utils</artifactId>
             <version>${policy.common.version}</version>
@@ -51,6 +56,21 @@
             <artifactId>commons-configuration2</artifactId>
             <version>2.4</version>
         </dependency>
+        <dependency>
+            <groupId>org.onap.policy.common</groupId>
+            <artifactId>gson</artifactId>
+            <version>${policy.common.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.onap.policy.models</groupId>
+            <artifactId>policy-models-tosca</artifactId>
+            <version>${policy.models.version}</version>
+        </dependency>
     </dependencies>
     <build>
         <plugins>
diff --git a/policy-utils/src/main/java/org/onap/policy/drools/policies/DomainMaker.java b/policy-utils/src/main/java/org/onap/policy/drools/policies/DomainMaker.java
new file mode 100644
index 00000000..6e1e0881
--- /dev/null
+++ b/policy-utils/src/main/java/org/onap/policy/drools/policies/DomainMaker.java
@@ -0,0 +1,233 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.policies;
+
+import com.worldturner.medeia.api.ValidationFailedException;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import lombok.NoArgsConstructor;
+import lombok.NonNull;
+import org.apache.commons.lang3.StringUtils;
+import org.onap.policy.common.utils.coder.CoderException;
+import org.onap.policy.common.utils.coder.StandardCoder;
+import org.onap.policy.common.utils.coder.StandardValCoder;
+import org.onap.policy.common.utils.resources.ResourceUtils;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyType;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyTypeIdentifier;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Converts Tosca Policies into Domain policies.
+ *
+ * <p>
+ * A Domain Policy is a specialized version of the Tosca Policy that
+ * conform with a particular domain specification in json schema format.
+ * A ToscaPolicy is a generic data structure where domain data is contained
+ * in a Map[String, Object]. This class contains that generic information
+ * into a concrete domain specific data model for the ToscaPolicy.
+ * </p>
+ */
+
+@NoArgsConstructor
+public class DomainMaker {
+
+    private static final Logger logger = LoggerFactory.getLogger(DomainMaker.class);
+
+    /**
+     * policy-type -> schema validator map.
+     */
+    private final Map<ToscaPolicyTypeIdentifier, StandardValCoder> validators = new ConcurrentHashMap<>();
+
+    /**
+     * non-validation serialization coder.
+     */
+    private final StandardCoder nonValCoder = new StandardCoder();
+
+    /**
+     * Does this json conform to a registered policy type schema?.
+     */
+    public boolean isConformant(@NonNull ToscaPolicyTypeIdentifier policyType, @NonNull String json) {
+        if (!isRegistered(policyType)) {
+            return false;
+        }
+
+        return validators.get(policyType).isConformant(json);
+    }
+
+    /**
+     * Does this policy conform to its domain specification?.
+     */
+    public boolean isConformant(@NonNull ToscaPolicy policy) {
+        String rawPolicy = serialize(policy);
+        if (StringUtils.isBlank(rawPolicy)) {
+            return false;
+        }
+
+        return isConformant(policy.getTypeIdentifier(), rawPolicy);
+    }
+
+    /**
+     * Does this domain policy conforms to its schema definition?.
+     */
+    public <T> boolean isDomainConformant(@NonNull ToscaPolicyTypeIdentifier policyType, @NonNull T domainPolicy) {
+        if (!isRegistered(policyType)) {
+            return false;
+        }
+
+        try {
+            return validators.get(policyType).encode(domainPolicy) != null;
+        } catch (CoderException e) {
+            logger.info("policy {}:{} is not conformant", policyType, domainPolicy.getClass().getName(), e);
+            return false;
+        }
+    }
+
+    /**
+     * Check policy conformance to its specification providing a list of errors
+     * in a ValidationFailedException.
+     */
+    public boolean conformance(@NonNull ToscaPolicy policy) throws ValidationFailedException {
+        if (!isRegistered(policy.getTypeIdentifier())) {
+            return false;
+        }
+
+        String rawPolicy = serialize(policy);
+        if (StringUtils.isBlank(rawPolicy)) {
+            return false;
+        }
+
+        try {
+            validators.get(policy.getTypeIdentifier()).conformance(rawPolicy);
+        } catch (CoderException e) {
+            logger.info("policy {}:{}:{} is not conformant",
+                    policy.getTypeIdentifier(), policy.getName(), policy.getVersion(), e);
+            if (e.getCause() instanceof ValidationFailedException) {
+                throw (ValidationFailedException) e.getCause();
+            }
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Checks a domain policy conformance to its specification providing a list of errors
+     * in a ValidationFailedException.
+     */
+    public <T> boolean conformance(@NonNull ToscaPolicyTypeIdentifier policyType, T domainPolicy)
+        throws ValidationFailedException {
+
+        if (!isRegistered(policyType)) {
+            return false;
+        }
+
+        try {
+            validators.get(policyType).encode(domainPolicy);
+        } catch (CoderException e) {
+            logger.info("policy {}:{}:{} is not conformant", policyType, domainPolicy.getClass().getName(), e);
+            if (e.getCause() instanceof ValidationFailedException) {
+                throw (ValidationFailedException) e.getCause();
+            }
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Registers a known schema resource for validation.
+     */
+    public boolean registerValidator(@NonNull ToscaPolicyTypeIdentifier policyType) {
+        //
+        // A known schema is an schema embedded in a .jar in the classpath under the schemas/
+        // resource directory matching the following syntax: schemas/<policy-type>.schema.json.
+        //
+        String schema =
+                ResourceUtils
+                        .getResourceAsString("schemas/"
+                            + policyType.getName() + "-" + policyType.getVersion() + ".schema.json");
+        if (schema == null) {
+            return false;
+        }
+
+        return registerValidator(policyType, schema);
+    }
+
+    /**
+     * Registers/Overrides a new/known schema for a policy type.
+     */
+    public boolean registerValidator(@NonNull ToscaPolicyTypeIdentifier policyType, @NonNull String schema) {
+        try {
+            validators.put(policyType, new StandardValCoder(schema, policyType.toString()));
+        } catch (RuntimeException r) {
+            logger.info("schema for {} is not valid", policyType, r);
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Converts a ToscaPolicy into a Domain Policy.
+     */
+    public <T> T convertTo(@NonNull ToscaPolicy toscaPolicy, @NonNull Class<T> clazz) throws CoderException {
+        return convertTo(toscaPolicy.getTypeIdentifier(), nonValCoder.encode(toscaPolicy), clazz);
+    }
+
+    /**
+     * Converts a JSON policy into a Domain Policy.
+     */
+    public <T> T convertTo(@NonNull ToscaPolicyTypeIdentifier policyType, @NonNull String json, @NonNull Class<T> clazz)
+            throws CoderException {
+        if (isRegistered(policyType)) {
+            return validators.get(policyType).decode(json, clazz);
+        } else {
+            return nonValCoder.decode(json, clazz);
+        }
+    }
+
+    /**
+     * Converts a Tosca Policy Type specification to a domain-specific json specification.
+     */
+    public String convertToSchema(@NonNull ToscaPolicyType policyType) {
+        //
+        // TODO:
+        // 1. Convert Tosca Policy Type definition schema to suitable json schema.
+        // 2. Call registerValidator to register
+        throw new UnsupportedOperationException("schema generation from policy type is not supported");
+    }
+
+    public boolean isRegistered(@NonNull ToscaPolicyTypeIdentifier policyType) {
+        return validators.containsKey(policyType) || registerValidator(policyType);
+    }
+
+
+    private String serialize(@NonNull ToscaPolicy policy) {
+        String rawPolicy = null;
+        try {
+            rawPolicy = nonValCoder.encode(policy);
+        } catch (CoderException e) {
+            logger.debug("policy {}:{} is invalid json", policy.getTypeIdentifier(), policy.getIdentifier(), e);
+        }
+        return rawPolicy;
+    }
+}
diff --git a/policy-utils/src/test/java/org/onap/policy/drools/models/domains/a/DomainAPolicy.java b/policy-utils/src/test/java/org/onap/policy/drools/models/domains/a/DomainAPolicy.java
new file mode 100644
index 00000000..04f20b2a
--- /dev/null
+++ b/policy-utils/src/test/java/org/onap/policy/drools/models/domains/a/DomainAPolicy.java
@@ -0,0 +1,49 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.models.domains.a;
+
+import com.google.gson.annotations.SerializedName;
+import lombok.Builder;
+import lombok.Data;
+
+@Data
+@Builder
+public class DomainAPolicy {
+    private static final long serialVersionUID = -8942432000554391455L;
+
+    @SerializedName("type")
+    public String type;
+
+    @SerializedName("type_version")
+    public String typeVersion;
+
+    @SerializedName("version")
+    public String version;
+
+    @SerializedName("metadata")
+    public Metadata metadata;
+
+    @SerializedName("properties")
+    public Properties properties;
+
+    @SerializedName("name")
+    public String name;
+}
diff --git a/policy-utils/src/test/java/org/onap/policy/drools/models/domains/a/Metadata.java b/policy-utils/src/test/java/org/onap/policy/drools/models/domains/a/Metadata.java
new file mode 100644
index 00000000..0cad4ff0
--- /dev/null
+++ b/policy-utils/src/test/java/org/onap/policy/drools/models/domains/a/Metadata.java
@@ -0,0 +1,35 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.models.domains.a;
+
+import com.google.gson.annotations.SerializedName;
+import java.io.Serializable;
+import lombok.Builder;
+import lombok.Data;
+
+@Data
+@Builder
+public class Metadata implements Serializable {
+    private static final long serialVersionUID = 476541531265304644L;
+
+    @SerializedName("policy-id")
+    public String policyId;
+}
diff --git a/policy-utils/src/test/java/org/onap/policy/drools/models/domains/a/Nested.java b/policy-utils/src/test/java/org/onap/policy/drools/models/domains/a/Nested.java
new file mode 100644
index 00000000..eedadeff
--- /dev/null
+++ b/policy-utils/src/test/java/org/onap/policy/drools/models/domains/a/Nested.java
@@ -0,0 +1,41 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.models.domains.a;
+
+import com.google.gson.annotations.SerializedName;
+import java.io.Serializable;
+import lombok.Builder;
+import lombok.Data;
+
+@Data
+@Builder
+public class Nested implements Serializable {
+    private static final long serialVersionUID = -1203143214137354429L;
+
+    @SerializedName("nested1")
+    public String nested1;
+
+    @SerializedName("nested2")
+    public boolean nested2;
+
+    @SerializedName("nested3")
+    public int nested3;
+}
diff --git a/policy-utils/src/test/java/org/onap/policy/drools/models/domains/a/Properties.java b/policy-utils/src/test/java/org/onap/policy/drools/models/domains/a/Properties.java
new file mode 100644
index 00000000..3ba66ce9
--- /dev/null
+++ b/policy-utils/src/test/java/org/onap/policy/drools/models/domains/a/Properties.java
@@ -0,0 +1,35 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.models.domains.a;
+
+import com.google.gson.annotations.SerializedName;
+import java.io.Serializable;
+import lombok.Builder;
+import lombok.Data;
+
+@Data
+@Builder
+public class Properties implements Serializable {
+    private static final long serialVersionUID = 8476625479607243095L;
+
+    @SerializedName("nested")
+    public Nested nested;
+}
diff --git a/policy-utils/src/test/java/org/onap/policy/drools/policies/DomainMakerTest.java b/policy-utils/src/test/java/org/onap/policy/drools/policies/DomainMakerTest.java
new file mode 100644
index 00000000..cfacc7ab
--- /dev/null
+++ b/policy-utils/src/test/java/org/onap/policy/drools/policies/DomainMakerTest.java
@@ -0,0 +1,194 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * 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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.drools.policies;
+
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+
+import com.worldturner.medeia.api.ValidationFailedException;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.common.utils.coder.CoderException;
+import org.onap.policy.common.utils.coder.StandardCoder;
+import org.onap.policy.drools.models.domains.a.DomainAPolicy;
+import org.onap.policy.drools.models.domains.a.Metadata;
+import org.onap.policy.drools.models.domains.a.Nested;
+import org.onap.policy.drools.models.domains.a.Properties;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyType;
+import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicyTypeIdentifier;
+
+public class DomainMakerTest {
+
+    private DomainMaker domainMaker;
+    private StandardCoder nonValCoder;
+
+    @Before
+    public void setUp() throws Exception {
+        domainMaker = new DomainMaker();
+        nonValCoder = new StandardCoder();
+    }
+
+    @Test
+    public void testIsConformantString() throws IOException {
+        ToscaPolicyTypeIdentifier policyTypeId =
+            new ToscaPolicyTypeIdentifier("policy.type.A", "1.0.0");
+        String rawJsonPolicyType =
+            getJsonFromFile("src/test/resources/policyA.json");
+
+        assertTrue(domainMaker.isConformant(policyTypeId, rawJsonPolicyType));
+
+        policyTypeId.setVersion("2.0.0");
+        assertFalse(domainMaker.isConformant(policyTypeId, rawJsonPolicyType));
+    }
+
+    @Test
+    public void testIsConformantToscaPolicy() throws IOException, CoderException {
+        ToscaPolicy policy = getToscaPolicy("src/test/resources/policyA.json");
+        assertTrue(domainMaker.isConformant(policy));
+
+        policy.setType("policy.type.Z");
+        assertFalse(domainMaker.isConformant(policy));
+    }
+
+    @Test
+    public void testIsDomainConformant() {
+        ToscaPolicyTypeIdentifier policyTypeId =
+                new ToscaPolicyTypeIdentifier("policy.type.A", "1.0.0");
+
+        DomainAPolicy domainAPolicy = createDomainPolicy();
+
+        assertTrue(domainMaker.isDomainConformant(policyTypeId, domainAPolicy));
+
+        // integer exceeding max. value
+        domainAPolicy.getProperties().getNested().setNested3(999);
+        assertFalse(domainMaker.isDomainConformant(policyTypeId, domainAPolicy));
+        domainAPolicy.getProperties().getNested().setNested3(33); // restore good valude
+
+        // not registered schema for policy type
+        policyTypeId.setVersion("2.0.0");
+        assertFalse(domainMaker.isDomainConformant(policyTypeId, domainAPolicy));
+    }
+
+
+    @Test
+    public void testConformance() throws IOException, CoderException {
+        ToscaPolicy policy1 = getToscaPolicy("src/test/resources/policyA.json");
+        assertTrue(domainMaker.conformance(policy1));
+
+        policy1.getProperties().remove("nested");
+        assertThatThrownBy(() -> domainMaker.conformance(policy1))
+                .isInstanceOf(ValidationFailedException.class)
+                .hasMessageContaining("Required property nested is missing from object");
+
+        DomainAPolicy domainAPolicy = createDomainPolicy();
+        assertTrue(domainMaker.conformance(policy1.getTypeIdentifier(), domainAPolicy));
+        assertDomainPolicy(domainAPolicy);
+
+        domainAPolicy.getProperties().getNested().setNested1("");
+        assertThatThrownBy(() -> domainMaker.conformance(policy1.getTypeIdentifier(), domainAPolicy))
+                .isInstanceOf(ValidationFailedException.class)
+                .hasMessageContaining("Pattern ^(.+)$ is not contained in text");
+    }
+
+    @Test
+    public void testRegisterValidator() throws IOException, CoderException {
+        ToscaPolicyTypeIdentifier policyTypeId =
+                new ToscaPolicyTypeIdentifier("policy.type.external", "9.9.9");
+
+        assertTrue(domainMaker.registerValidator(policyTypeId,
+            getJsonFromFile("src/test/resources/policy.type.external-9.9.9.schema.json")));
+
+        ToscaPolicy policy = getToscaPolicy("src/test/resources/policyA.json");
+        policy.setType("policy.type.external");
+        policy.setTypeVersion("9.9.9");
+        assertTrue(domainMaker.isConformant(policy));
+
+        policy.setTypeVersion("1.0.0");
+        assertFalse(domainMaker.isConformant(policy));
+    }
+
+    @Test
+    public void testConvertToDomainPolicy() throws IOException, CoderException {
+        DomainAPolicy domainAPolicy =
+                domainMaker.convertTo(getToscaPolicy("src/test/resources/policyA.json"), DomainAPolicy.class);
+        assertDomainPolicy(domainAPolicy);
+
+        assertNotNull(domainMaker.convertTo(getToscaPolicy("src/test/resources/policyA-no-policy-type.json"),
+                DomainAPolicy.class));
+    }
+
+    @Test
+    public void testConvertToSchema() {
+        assertThatThrownBy(() -> domainMaker
+            .convertToSchema(new ToscaPolicyType()))
+            .isInstanceOf(UnsupportedOperationException.class);
+    }
+
+    @Test
+    public void testIsRegistered() {
+        ToscaPolicyTypeIdentifier policyTypeId1 =
+                new ToscaPolicyTypeIdentifier("policy.type.A", "1.0.0");
+        assertTrue(domainMaker.isRegistered(policyTypeId1));
+
+        ToscaPolicyTypeIdentifier policyTypeId2 =
+                new ToscaPolicyTypeIdentifier("policy.type.external", "7.7.9");
+        assertFalse(domainMaker.isRegistered(policyTypeId2));
+
+    }
+
+    private String getJsonFromFile(String filePath) throws IOException {
+        return new String(Files.readAllBytes(Paths.get(filePath)));
+    }
+
+    private ToscaPolicy getToscaPolicy(String filePath) throws CoderException, IOException {
+        String policyJson = getJsonFromFile(filePath);
+        return new StandardCoder().decode(policyJson, ToscaPolicy.class);
+    }
+
+    private DomainAPolicy createDomainPolicy() {
+        return DomainAPolicy.builder().metadata(Metadata.builder().policyId("A").build())
+                       .name("A")
+                       .version("1.0.0")
+                       .type("policy.type.A")
+                       .typeVersion("1.0.0")
+                       .properties(Properties.builder()
+                           .nested(Nested.builder().nested1("nested1").nested2(true).nested3(50).build())
+                           .build()).build();
+    }
+
+    private void assertDomainPolicy(DomainAPolicy domainAPolicy) {
+        assertEquals("A", domainAPolicy.getName());
+        assertEquals("1.0.0", domainAPolicy.getVersion());
+        assertEquals("1.0.0", domainAPolicy.getTypeVersion());
+        assertEquals("policy.type.A", domainAPolicy.getType());
+        assertEquals("A", domainAPolicy.getMetadata().getPolicyId());
+        assertEquals("nested1", domainAPolicy.getProperties().getNested().getNested1());
+        assertEquals(true, domainAPolicy.getProperties().getNested().isNested2());
+        assertEquals(50, domainAPolicy.getProperties().getNested().getNested3());
+    }
+}
\ No newline at end of file
diff --git a/policy-utils/src/test/resources/policy.type.external-9.9.9.schema.json b/policy-utils/src/test/resources/policy.type.external-9.9.9.schema.json
new file mode 100644
index 00000000..d8651eb5
--- /dev/null
+++ b/policy-utils/src/test/resources/policy.type.external-9.9.9.schema.json
@@ -0,0 +1,7 @@
+{
+    "definitions": {},
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "$id": "http://www.onap.org/policy/models/schemas/policy.type.external",
+    "type": "object",
+    "title": "Domain policy.type.external Policy root schema"
+}
diff --git a/policy-utils/src/test/resources/policyA-no-policy-type.json b/policy-utils/src/test/resources/policyA-no-policy-type.json
new file mode 100644
index 00000000..c92b736c
--- /dev/null
+++ b/policy-utils/src/test/resources/policyA-no-policy-type.json
@@ -0,0 +1,16 @@
+{
+  "type": "policy.type.Z",
+  "type_version": "1.0.0",
+  "version": "1.0.0",
+  "metadata": {
+    "policy-id": "A"
+  },
+  "properties": {
+    "nested": {
+      "nested1": "nested1",
+      "nested2": true,
+      "nested3": 50
+    }
+  },
+  "name": "A"
+}
\ No newline at end of file
diff --git a/policy-utils/src/test/resources/policyA.json b/policy-utils/src/test/resources/policyA.json
new file mode 100644
index 00000000..7afa79d3
--- /dev/null
+++ b/policy-utils/src/test/resources/policyA.json
@@ -0,0 +1,16 @@
+{
+  "type": "policy.type.A",
+  "type_version": "1.0.0",
+  "version": "1.0.0",
+  "metadata": {
+    "policy-id": "A"
+  },
+  "properties": {
+    "nested": {
+      "nested1": "nested1",
+      "nested2": true,
+      "nested3": 50
+    }
+  },
+  "name": "A"
+}
\ No newline at end of file
diff --git a/policy-utils/src/test/resources/schemas/policy.type.A-1.0.0.schema.json b/policy-utils/src/test/resources/schemas/policy.type.A-1.0.0.schema.json
new file mode 100644
index 00000000..089ec44f
--- /dev/null
+++ b/policy-utils/src/test/resources/schemas/policy.type.A-1.0.0.schema.json
@@ -0,0 +1,89 @@
+{
+    "definitions": {},
+    "$schema": "http://json-schema.org/draft-07/schema#",
+    "$id": "http://www.onap.org/policy/models/schemas/policy.type.A",
+    "type": "object",
+    "title": "Domain policy.type.A Policy root schema",
+    "required": [
+        "type",
+        "type_version",
+        "version",
+        "metadata",
+        "properties"
+    ],
+    "properties": {
+        "type": {
+            "$id": "#/properties/type",
+            "type": "string",
+            "pattern": "^(.+)$"
+        },
+        "type_version": {
+            "$id": "#/properties/type_version",
+            "type": "string",
+            "pattern": "^(.+)$"
+        },
+        "version": {
+            "$id": "#/properties/version",
+            "type": "string",
+            "title": "Version",
+            "pattern": "^(.+)$"
+        },
+        "name": {
+            "$id": "#/properties/name",
+            "type": "string",
+            "pattern": "^(.+)$"
+        },
+        "metadata": {
+            "$id": "#/properties/metadata",
+            "type": "object",
+            "title": "Metadata",
+            "required": [
+                "policy-id"
+            ],
+            "properties": {
+                "policy-id": {
+                    "$id": "#/properties/metadata/properties/policy-id",
+                    "type": "string",
+                    "pattern": "^(.+)$"
+                }
+            }
+        },
+        "properties": {
+            "$id": "#/properties/properties",
+            "type": "object",
+            "required": [
+                "nested"
+            ],
+            "properties": {
+                "nested": {
+                    "$id": "#/properties/properties/properties/nested",
+                    "type": "object",
+                    "required": [
+                        "nested1",
+                        "nested2",
+                        "nested3"
+                    ],
+                    "properties": {
+                        "nested1": {
+                            "$id": "#/properties/properties/properties/nested/properties/nested1",
+                            "type": "string",
+                            "pattern": "^(.+)$"
+                        },
+                        "nested2": {
+                            "$id": "#/properties/properties/properties/nested/properties/nested2",
+                            "type": "boolean",
+                            "default": true
+                        },
+                        "nested3": {
+                            "$id": "#/properties/properties/properties/nested/properties/nested3",
+                            "type": "integer",
+                            "minimum": 1,
+                            "maximum": 100,
+                            "default": 30
+                        }
+                    }
+                }
+            }
+        }
+    }
+}