Build XACML PDP support for native xacml policy type

Added a new native application to the service loader framework
Added a new translator for the native application
Added custom serialization providers for xacml+json and xacml+xml
Added a new endpoint for native xacml decision api
Added a new api provider function to handle the native xacml api calls
Added corresponding junit tests

Issue-ID: POLICY-2182
Change-Id: I30fa4637612c324d543f9952386cf1a27a52d76c
Signed-off-by: Chenfei Gao <cgao@research.att.com>

6 files changed, 389 insertions, 3 deletions

diff --git a/main/src/test/java/org/onap/policy/pdpx/main/rest/TestDecision.java b/main/src/test/java/org/onap/policy/pdpx/main/rest/TestDecision.java
index e3ad7b67..178e4b14 100644
--- a/main/src/test/java/org/onap/policy/pdpx/main/rest/TestDecision.java
+++ b/main/src/test/java/org/onap/policy/pdpx/main/rest/TestDecision.java
@@ -24,6 +24,7 @@ package org.onap.policy.pdpx.main.rest;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.Assert.assertEquals;
 
+import com.att.research.xacml.std.dom.DOMStructureException;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import java.io.File;
@@ -54,6 +55,7 @@ import org.onap.policy.common.endpoints.parameters.RestServerParameters;
 import org.onap.policy.common.endpoints.parameters.TopicParameterGroup;
 import org.onap.policy.common.gson.GsonMessageBodyHandler;
 import org.onap.policy.common.utils.network.NetworkUtil;
+import org.onap.policy.common.utils.resources.ResourceUtils;
 import org.onap.policy.models.decisions.concepts.DecisionRequest;
 import org.onap.policy.models.decisions.concepts.DecisionResponse;
 import org.onap.policy.models.errors.concepts.ErrorResponse;
@@ -73,6 +75,7 @@ public class TestDecision {
     private static Main main;
     private static HttpClient client;
     private static CommonTestData testData = new CommonTestData();
+    private static final String APPLICATION_XACML_XML = "application/xacml+xml";
 
     @ClassRule
     public static final TemporaryFolder appsFolder = new TemporaryFolder();
@@ -179,6 +182,22 @@ public class TestDecision {
         assertThat(response.getStatus()).isEqualTo("Permit");
     }
 
+    @Test
+    public void testDecision_Native() throws IOException, DOMStructureException {
+
+        LOGGER.info("Running test testDecision_Native");
+
+        String requestAsString = ResourceUtils.getResourceAsString(
+                "src/test/resources/decisions/decision.native.request.xml");
+        if (requestAsString == null) {
+            throw new IOException("failed to read the xml request");
+        }
+
+        String response = getNativeDecision(requestAsString);
+        LOGGER.info("Response {}", response);
+        assertThat(response).contains("NOTAPPLICABLE");
+    }
+
     private static Main startXacmlPdpService(File params) throws PolicyXacmlPdpException {
         final String[] XacmlPdpConfigParameters = {"-c", params.getAbsolutePath()};
         return new Main(XacmlPdpConfigParameters);
@@ -191,17 +210,27 @@ public class TestDecision {
     private DecisionResponse getDecision(DecisionRequest request) {
 
         Entity<DecisionRequest> entityRequest = Entity.entity(request, MediaType.APPLICATION_JSON);
-        Response response = client.post("", entityRequest, Collections.emptyMap());
+        Response response = client.post("/decision", entityRequest, Collections.emptyMap());
 
         assertEquals(200, response.getStatus());
 
         return HttpClient.getBody(response, DecisionResponse.class);
     }
 
+    private String getNativeDecision(String request) {
+
+        Entity<String> entityRequest = Entity.entity(request, APPLICATION_XACML_XML);
+        Response response = client.post("/xacml", entityRequest, Collections.emptyMap());
+
+        assertEquals(200, response.getStatus());
+
+        return HttpClient.getBody(response, String.class);
+    }
+
     private ErrorResponse getErrorDecision(DecisionRequest request) {
 
         Entity<DecisionRequest> entityRequest = Entity.entity(request, MediaType.APPLICATION_JSON);
-        Response response = client.post("", entityRequest, Collections.emptyMap());
+        Response response = client.post("/decision", entityRequest, Collections.emptyMap());
 
         assertEquals(400, response.getStatus());
 
@@ -213,7 +242,7 @@ public class TestDecision {
                 .clientName("testDecisionClient")
                 .serializationProvider(GsonMessageBodyHandler.class.getName())
                 .useHttps(false).allowSelfSignedCerts(false).hostname("localhost").port(port)
-                .basePath("policy/pdpx/v1/decision")
+                .basePath("policy/pdpx/v1")
                 .userName("healthcheck").password("zb!XztG34").managed(true).build());
     }
 
diff --git a/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/CommonSerialization.java b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/CommonSerialization.java
new file mode 100644
index 00000000..2b4a4fd0
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/CommonSerialization.java
@@ -0,0 +1,83 @@
+/*-
+ * ============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.pdpx.main.rest.serialization;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import com.att.research.xacml.api.Request;
+import com.att.research.xacml.api.Response;
+import java.lang.annotation.Annotation;
+import java.lang.reflect.Type;
+import javax.ws.rs.core.MediaType;
+
+public class CommonSerialization {
+
+    @SuppressWarnings("rawtypes")
+    private static final Class REQUEST_CLASS = Request.class;
+    @SuppressWarnings("rawtypes")
+    private static final Class RESPONSE_CLASS = Response.class;
+    @SuppressWarnings("rawtypes")
+    private static final Class GENERAL_CLASS = MyObject.class;
+
+    public static void testIsWritableOrReadable(String primaryType, String subType,
+            MultiArgsFunction<Class<?>, Type, Annotation[], MediaType, Boolean> getter) {
+
+        // null media type
+        assertFalse(getter.apply(null, null, null, null));
+
+        // valid media type and class type
+        assertTrue("writeable " + subType, getter.apply(
+                REQUEST_CLASS, null, null, new MediaType(primaryType, subType)));
+        assertTrue("writeable " + subType, getter.apply(
+                RESPONSE_CLASS, null, null, new MediaType(primaryType, subType)));
+
+        // valid media type but invalid class type
+        assertFalse(getter.apply(
+                GENERAL_CLASS, null, null, new MediaType(primaryType, subType)));
+
+        // null subtype or invalid media type
+        assertFalse(getter.apply(null, null, null, new MediaType(primaryType, null)));
+        assertFalse(getter.apply(null, null, null, MediaType.APPLICATION_JSON_TYPE));
+    }
+
+    public static class MyObject {
+        private int id;
+
+        public MyObject() {
+            super();
+        }
+
+        public MyObject(int id) {
+            this.id = id;
+        }
+
+        @Override
+        public String toString() {
+            return "MyObject [id=" + id + "]";
+        }
+    }
+
+    @FunctionalInterface
+    public interface MultiArgsFunction<T, U, V, W, R> {
+        public R apply(T value1, U value2, V value3, W value4);
+    }
+}
\ No newline at end of file
diff --git a/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlJsonExceptionMapper.java b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlJsonExceptionMapper.java
new file mode 100644
index 00000000..1b3cc209
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlJsonExceptionMapper.java
@@ -0,0 +1,57 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pdpx.main.rest.serialization;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.IOException;
+import javax.ws.rs.core.Response;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.common.utils.coder.CoderException;
+import org.onap.policy.common.utils.coder.StandardCoder;
+
+public class TestXacmlJsonExceptionMapper {
+    private XacmlJsonExceptionMapper mapper;
+
+    @Before
+    public void setUp() {
+        mapper = new XacmlJsonExceptionMapper();
+    }
+
+    @Test
+    public void testToResponse() throws CoderException {
+        final IOException writeToEx = new IOException("failed to convert a json response to a string");
+        final IOException readFromEx = new IOException("failed to decode incoming request string to a json request");
+        final IOException unexpectedEx = new IOException("unexpected exception");
+        final Response writeToResp = mapper.toResponse(writeToEx);
+        final Response readFromResp = mapper.toResponse(readFromEx);
+        final Response unexpectedResp = mapper.toResponse(unexpectedEx);
+
+        assertEquals(Response.Status.BAD_REQUEST.getStatusCode(), writeToResp.getStatus());
+        assertEquals("{'errorDetails':'invalid JSON xacml response'}".replace('\'', '"'),
+                        new StandardCoder().encode(writeToResp.getEntity()));
+        assertEquals(Response.Status.BAD_REQUEST.getStatusCode(), readFromResp.getStatus());
+        assertEquals("{'errorDetails':'invalid JSON xacml request'}".replace('\'', '"'),
+                        new StandardCoder().encode(readFromResp.getEntity()));
+        assertEquals(Response.Status.INTERNAL_SERVER_ERROR.getStatusCode(), unexpectedResp.getStatus());
+    }
+}
\ No newline at end of file
diff --git a/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlJsonMessageBodyHandler.java b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlJsonMessageBodyHandler.java
new file mode 100644
index 00000000..5d5a4b88
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlJsonMessageBodyHandler.java
@@ -0,0 +1,59 @@
+/*-
+ * ============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.pdpx.main.rest.serialization;
+
+import com.att.research.xacml.std.dom.DOMStructureException;
+import java.io.IOException;
+import org.junit.Before;
+import org.junit.Test;
+
+public class TestXacmlJsonMessageBodyHandler {
+
+    private static final String PRIMARY_TYPE = "application";
+    private static final String SUB_TYPE = "xacml+json";
+
+    private XacmlJsonMessageBodyHandler hdlr;
+
+    @Before
+    public void setUp() {
+        hdlr = new XacmlJsonMessageBodyHandler();
+    }
+
+    @Test
+    public void testIsWriteable() {
+        CommonSerialization.testIsWritableOrReadable(PRIMARY_TYPE, SUB_TYPE, hdlr::isWriteable);
+    }
+
+    @Test
+    public void testWriteTo() throws IOException, DOMStructureException {
+        //TODO: placeholder for JsonResponseTranslator
+    }
+
+    @Test
+    public void testIsReadable() {
+        CommonSerialization.testIsWritableOrReadable(PRIMARY_TYPE, SUB_TYPE, hdlr::isReadable);
+    }
+
+    @Test
+    public void testReadFrom() throws IOException {
+        //TODO: placeholder for JsonRequestTranslator
+    }
+}
\ No newline at end of file
diff --git a/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlXmlExceptionMapper.java b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlXmlExceptionMapper.java
new file mode 100644
index 00000000..c9b7bac5
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlXmlExceptionMapper.java
@@ -0,0 +1,57 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP
+ * ================================================================================
+ * 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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pdpx.main.rest.serialization;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.IOException;
+import javax.ws.rs.core.Response;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.common.utils.coder.CoderException;
+import org.onap.policy.common.utils.coder.StandardCoder;
+
+public class TestXacmlXmlExceptionMapper {
+    private XacmlXmlExceptionMapper mapper;
+
+    @Before
+    public void setUp() {
+        mapper = new XacmlXmlExceptionMapper();
+    }
+
+    @Test
+    public void testToResponse() throws CoderException {
+        final IOException writeToEx = new IOException("failed to convert a dom response to a string");
+        final IOException readFromEx = new IOException("failed to decode incoming request string to a dom request");
+        final IOException unexpectedEx = new IOException("unexpected exception");
+        final Response writeToResp = mapper.toResponse(writeToEx);
+        final Response readFromResp = mapper.toResponse(readFromEx);
+        final Response unexpectedResp = mapper.toResponse(unexpectedEx);
+
+        assertEquals(Response.Status.BAD_REQUEST.getStatusCode(), writeToResp.getStatus());
+        assertEquals("{'errorDetails':'invalid XML xacml response'}".replace('\'', '"'),
+                        new StandardCoder().encode(writeToResp.getEntity()));
+        assertEquals(Response.Status.BAD_REQUEST.getStatusCode(), readFromResp.getStatus());
+        assertEquals("{'errorDetails':'invalid XML xacml request'}".replace('\'', '"'),
+                        new StandardCoder().encode(readFromResp.getEntity()));
+        assertEquals(Response.Status.INTERNAL_SERVER_ERROR.getStatusCode(), unexpectedResp.getStatus());
+    }
+}
\ No newline at end of file
diff --git a/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlXmlMessageBodyHandler.java b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlXmlMessageBodyHandler.java
new file mode 100644
index 00000000..4ae75387
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlXmlMessageBodyHandler.java
@@ -0,0 +1,101 @@
+/*-
+ * ============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.pdpx.main.rest.serialization;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import com.att.research.xacml.api.Request;
+import com.att.research.xacml.api.RequestAttributes;
+import com.att.research.xacml.api.Response;
+import com.att.research.xacml.std.dom.DOMResponse;
+import com.att.research.xacml.std.dom.DOMStructureException;
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.util.Iterator;
+import org.junit.Before;
+import org.junit.Test;
+import org.onap.policy.common.utils.resources.ResourceUtils;
+
+public class TestXacmlXmlMessageBodyHandler {
+
+    private static final String PRIMARY_TYPE = "application";
+    private static final String SUB_TYPE = "xacml+xml";
+
+    @SuppressWarnings("rawtypes")
+    private static final Class REQUEST_CLASS = Request.class;
+    @SuppressWarnings("rawtypes")
+    private static final Class RESPONSE_CLASS = Response.class;
+
+    private XacmlXmlMessageBodyHandler hdlr;
+
+    @Before
+    public void setUp() {
+        hdlr = new XacmlXmlMessageBodyHandler();
+    }
+
+    @Test
+    public void testIsWriteable() {
+        CommonSerialization.testIsWritableOrReadable(PRIMARY_TYPE, SUB_TYPE, hdlr::isWriteable);
+    }
+
+    @Test
+    public void testWriteTo() throws IOException, DOMStructureException {
+        ByteArrayOutputStream stream = new ByteArrayOutputStream();
+        Response resp = DOMResponse.load(ResourceUtils.getResourceAsString(
+                "src/test/resources/decisions/decision.native.response.xml"));
+        hdlr.writeTo(resp, RESPONSE_CLASS, RESPONSE_CLASS, null, null, null, stream);
+        assertEquals(resp, DOMResponse.load(new ByteArrayInputStream(stream.toByteArray())));
+    }
+
+    @Test
+    public void testIsReadable() {
+        CommonSerialization.testIsWritableOrReadable(PRIMARY_TYPE, SUB_TYPE, hdlr::isReadable);
+    }
+
+    @Test
+    @SuppressWarnings("unchecked")
+    public void testReadFrom() throws IOException {
+        Request req = hdlr.readFrom(REQUEST_CLASS, REQUEST_CLASS, null, null, null, ResourceUtils.getResourceAsStream(
+                "src/test/resources/decisions/decision.native.request.xml"));
+        assertFalse(req.getCombinedDecision());
+        assertFalse(req.getReturnPolicyIdList());
+        assertTrue(req.getRequestAttributes().size() == 4);
+        Iterator<RequestAttributes> iter = req.getRequestAttributes().iterator();
+
+        RequestAttributes firstRequestAttributes = iter.next();
+        assertTrue(firstRequestAttributes.getAttributes().size() == 1);
+        assertEquals("Julius Hibbert", firstRequestAttributes.getAttributes().iterator().next()
+                .getValues().iterator().next().getValue().toString());
+
+        RequestAttributes secondRequestAttributes = iter.next();
+        assertTrue(secondRequestAttributes.getAttributes().size() == 1);
+        assertEquals("http://medico.com/record/patient/BartSimpson", secondRequestAttributes.getAttributes()
+                .iterator().next().getValues().iterator().next().getValue().toString());
+
+        RequestAttributes thirdRequestAttributes = iter.next();
+        assertTrue(thirdRequestAttributes.getAttributes().size() == 1);
+        assertEquals("read", thirdRequestAttributes.getAttributes().iterator().next()
+                .getValues().iterator().next().getValue().toString());
+    }
+}
\ No newline at end of file