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>

1 files changed, 163 insertions, 0 deletions

diff --git a/applications/native/src/test/java/org/onap/policy/xacml/pdp/application/nativ/NativePdpApplicationTest.java b/applications/native/src/test/java/org/onap/policy/xacml/pdp/application/nativ/NativePdpApplicationTest.java
new file mode 100644
index 00000000..b25c2a31
--- /dev/null
+++ b/applications/native/src/test/java/org/onap/policy/xacml/pdp/application/nativ/NativePdpApplicationTest.java
@@ -0,0 +1,163 @@
+/*-
+ * ============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.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.xacml.pdp.application.nativ;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import com.att.research.xacml.api.Decision;
+import com.att.research.xacml.api.Request;
+import com.att.research.xacml.api.Response;
+import com.att.research.xacml.std.dom.DOMRequest;
+import com.att.research.xacml.std.dom.DOMResponse;
+import java.io.File;
+import java.util.Properties;
+import java.util.ServiceLoader;
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+import org.onap.policy.common.endpoints.parameters.RestServerParameters;
+import org.onap.policy.common.utils.resources.TextFileUtils;
+import org.onap.policy.pdp.xacml.application.common.XacmlApplicationServiceProvider;
+import org.onap.policy.pdp.xacml.application.common.XacmlPolicyUtils;
+import org.onap.policy.pdp.xacml.xacmltest.TestUtils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+public class NativePdpApplicationTest {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(NativePdpApplicationTest.class);
+    private static final String PERMIT = "Permit";
+    private static Properties properties = new Properties();
+    private static File propertiesFile;
+    private static RestServerParameters clientParams = new RestServerParameters();
+    private static NativePdpApplication service;
+    private static Request request;
+
+    @ClassRule
+    public static final TemporaryFolder policyFolder = new TemporaryFolder();
+
+    /**
+     * Copies the xacml.properties and policies files into
+     * temporary folder and loads the service provider saving
+     * instance of provider off for other tests to use.
+     */
+    @BeforeClass
+    public static void setup() throws Exception {
+        LOGGER.info("Setting up class");
+        //
+        // Setup our temporary folder
+        //
+        XacmlPolicyUtils.FileCreator myCreator = (filename) -> policyFolder.newFile(filename);
+        propertiesFile = XacmlPolicyUtils.copyXacmlPropertiesContents("src/test/resources/xacml.properties",
+                properties, myCreator);
+        //
+        // Load service
+        //
+        ServiceLoader<XacmlApplicationServiceProvider> applicationLoader =
+                ServiceLoader.load(XacmlApplicationServiceProvider.class);
+        //
+        // Find the native application and save for use in all the tests
+        //
+        StringBuilder strDump = new StringBuilder("Loaded applications:" + XacmlPolicyUtils.LINE_SEPARATOR);
+        for (XacmlApplicationServiceProvider application : applicationLoader) {
+            //
+            // Is it our service?
+            //
+            if (application instanceof NativePdpApplication) {
+                //
+                // Should be the first and only one
+                //
+                assertThat(service).isNull();
+                service = (NativePdpApplication) application;
+            }
+            strDump.append(application.applicationName());
+            strDump.append(" supports ");
+            strDump.append(application.supportedPolicyTypes());
+            strDump.append(XacmlPolicyUtils.LINE_SEPARATOR);
+        }
+        LOGGER.info("{}", strDump);
+        //
+        // Tell it to initialize based on the properties file
+        // we just built for it.
+        //
+        service.initialize(propertiesFile.toPath().getParent(), clientParams);
+        //
+        // Load XACML Request
+        //
+        request = DOMRequest.load(
+                TextFileUtils.getTextFileAsString(
+                        "src/test/resources/requests/native.policy.request.xml"));
+    }
+
+    @Test
+    public void testNativePolicy() throws Exception {
+
+        LOGGER.info("*********** Running native policy test *************");
+        //
+        // Now load the TOSCA compliant native policy - make sure
+        // the pdp can support it and have it load into the PDP.
+        //
+        TestUtils.loadPolicies("src/test/resources/policies/native.policy.yaml", service);
+        //
+        // Send the request and verify decision result
+        //
+        requestAndCheckDecision(request, PERMIT);
+    }
+
+    /**
+     * Request a decision and check that it matches expectation.
+     *
+     * @param request to send to XACML PDP
+     * @param expected from the response
+     * @throws Exception on errors requesting a decision and checking the returned decision
+     *
+     **/
+    private void requestAndCheckDecision(Request request, String expected) throws Exception {
+        //
+        // Ask for a decision
+        //
+        Response decision = service.makeNativeDecision(request);
+        //
+        // Check decision
+        //
+        checkDecision(expected, decision);
+    }
+
+    /**
+     * Check that decision matches expectation.
+     *
+     * @param expected from the response
+     * @param response received
+     * @throws Exception on errors checking the decision
+     *
+     **/
+    public void checkDecision(String expected, Response response) throws Exception {
+        LOGGER.info("Looking for {} Decision", expected);
+        assertThat(response).isNotNull();
+        Decision decision = response.getResults().iterator().next().getDecision();
+        assertThat(decision).isNotNull();
+        assertThat(decision.toString()).isEqualTo(expected);
+        LOGGER.info("Xacml response we received {}", DOMResponse.toString(response));
+    }
+}
\ No newline at end of file