[ONOS-6169] Implement codec for LispTeAddress with unit test

Change-Id: I47edf0d20e2a8abdfd38bde19afa51b5abfb7240
diff --git a/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/LispMappingExtensionCodecRegistrator.java b/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/LispMappingExtensionCodecRegistrator.java
index 027aefe..d9e5e68 100644
--- a/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/LispMappingExtensionCodecRegistrator.java
+++ b/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/LispMappingExtensionCodecRegistrator.java
@@ -30,6 +30,8 @@
 import org.onosproject.drivers.lisp.extensions.codec.LispNonceAddressCodec;
 import org.onosproject.drivers.lisp.extensions.codec.LispSegmentAddressCodec;
 import org.onosproject.drivers.lisp.extensions.codec.LispSrcDstAddressCodec;
+import org.onosproject.drivers.lisp.extensions.codec.LispTeAddressCodec;
+import org.onosproject.drivers.lisp.extensions.codec.LispTeRecordCodec;
 import org.onosproject.mapping.web.MappingCodecRegistrator;
 import org.slf4j.Logger;
 
@@ -64,6 +66,8 @@
         codecService.registerCodec(LispNonceAddress.class, new LispNonceAddressCodec());
         codecService.registerCodec(LispSegmentAddress.class, new LispSegmentAddressCodec());
         codecService.registerCodec(LispSrcDstAddress.class, new LispSrcDstAddressCodec());
+        codecService.registerCodec(LispTeAddress.class, new LispTeAddressCodec());
+        codecService.registerCodec(LispTeAddress.TeRecord.class, new LispTeRecordCodec());
 
         log.info("Started");
     }
@@ -79,6 +83,8 @@
         codecService.unregisterCodec(LispNonceAddress.class);
         codecService.unregisterCodec(LispSegmentAddress.class);
         codecService.unregisterCodec(LispSrcDstAddress.class);
+        codecService.unregisterCodec(LispTeAddress.class);
+        codecService.unregisterCodec(LispTeAddress.TeRecord.class);
 
         registrator.deactivate();
         registrator = null;
diff --git a/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/codec/LispTeAddressCodec.java b/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/codec/LispTeAddressCodec.java
new file mode 100644
index 0000000..ff518f4
--- /dev/null
+++ b/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/codec/LispTeAddressCodec.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * 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.
+ */
+package org.onosproject.drivers.lisp.extensions.codec;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.google.common.collect.Lists;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.drivers.lisp.extensions.LispTeAddress;
+
+import java.util.List;
+import java.util.stream.IntStream;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.onlab.util.Tools.nullIsIllegal;
+
+/**
+ * LISP traffic engineering address codec.
+ */
+public final class LispTeAddressCodec extends JsonCodec<LispTeAddress> {
+
+    protected static final String TE_RECORDS = "records";
+
+    private static final String MISSING_MEMBER_MESSAGE =
+                                " member is required in LispTeAddress";
+
+    @Override
+    public ObjectNode encode(LispTeAddress address, CodecContext context) {
+        checkNotNull(address, "LispTeAddress cannot be null");
+
+        final ObjectNode result = context.mapper().createObjectNode();
+        final ArrayNode jsonRecords = result.putArray(TE_RECORDS);
+
+        final JsonCodec<LispTeAddress.TeRecord> recordCodec =
+                context.codec(LispTeAddress.TeRecord.class);
+
+        for (final LispTeAddress.TeRecord record : address.getTeRecords()) {
+            jsonRecords.add(recordCodec.encode(record, context));
+        }
+
+        return result;
+    }
+
+    @Override
+    public LispTeAddress decode(ObjectNode json, CodecContext context) {
+        if (json == null || !json.isObject()) {
+            return null;
+        }
+
+        final JsonCodec<LispTeAddress.TeRecord> recordCodec =
+                context.codec(LispTeAddress.TeRecord.class);
+
+        JsonNode recordsJson = nullIsIllegal(json.get(TE_RECORDS),
+                TE_RECORDS + MISSING_MEMBER_MESSAGE);
+        List<LispTeAddress.TeRecord> records = Lists.newArrayList();
+
+        if (recordsJson != null) {
+            IntStream.range(0, recordsJson.size())
+                    .forEach(i -> records.add(
+                            recordCodec.decode(get(recordsJson, i), context)));
+        }
+
+        return new LispTeAddress.Builder()
+                        .withTeRecords(records)
+                        .build();
+    }
+}
diff --git a/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/codec/LispTeRecordCodec.java b/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/codec/LispTeRecordCodec.java
new file mode 100644
index 0000000..b5a3cc8
--- /dev/null
+++ b/drivers/lisp/src/main/java/org/onosproject/drivers/lisp/extensions/codec/LispTeRecordCodec.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * 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.
+ */
+package org.onosproject.drivers.lisp.extensions.codec;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.drivers.lisp.extensions.LispTeAddress;
+import org.onosproject.mapping.addresses.MappingAddress;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.onlab.util.Tools.nullIsIllegal;
+
+/**
+ * LISP traffic engineering record codec.
+ */
+public final class LispTeRecordCodec extends JsonCodec<LispTeAddress.TeRecord> {
+
+    protected static final String LOOKUP = "lookup";
+    protected static final String RLOC_PROBE = "rlocProbe";
+    protected static final String STRICT = "strict";
+    protected static final String ADDRESS = "address";
+
+    private static final String MISSING_MEMBER_MESSAGE =
+                                " member is required in LispTeRecord";
+
+    @Override
+    public ObjectNode encode(LispTeAddress.TeRecord record, CodecContext context) {
+        checkNotNull(record, "LispTeRecord cannot be null");
+
+        final ObjectNode result = context.mapper().createObjectNode()
+                .put(LOOKUP, record.isLookup())
+                .put(RLOC_PROBE, record.isRlocProbe())
+                .put(STRICT, record.isStrict());
+
+        if (record.getAddress() != null) {
+            final JsonCodec<MappingAddress> addressCodec =
+                    context.codec(MappingAddress.class);
+            ObjectNode address = addressCodec.encode(record.getAddress(), context);
+            result.set(ADDRESS, address);
+        }
+
+        return result;
+    }
+
+    @Override
+    public LispTeAddress.TeRecord decode(ObjectNode json, CodecContext context) {
+        if (json == null || !json.isObject()) {
+            return null;
+        }
+
+        boolean isLookup = nullIsIllegal(json.get(LOOKUP),
+                LOOKUP + MISSING_MEMBER_MESSAGE).asBoolean();
+        boolean isRlocProbe = nullIsIllegal(json.get(RLOC_PROBE),
+                RLOC_PROBE + MISSING_MEMBER_MESSAGE).asBoolean();
+        boolean isStrict = nullIsIllegal(json.get(STRICT),
+                STRICT + MISSING_MEMBER_MESSAGE).asBoolean();
+
+        ObjectNode addressJson = get(json, ADDRESS);
+        MappingAddress mappingAddress = null;
+
+        if (addressJson != null) {
+            final JsonCodec<MappingAddress> addressCodec =
+                    context.codec(MappingAddress.class);
+            mappingAddress = addressCodec.decode(addressJson, context);
+        }
+
+        return new LispTeAddress.TeRecord.Builder()
+                        .withIsLookup(isLookup)
+                        .withIsRlocProbe(isRlocProbe)
+                        .withIsStrict(isStrict)
+                        .withRtrRlocAddress(mappingAddress)
+                        .build();
+    }
+
+}
diff --git a/drivers/lisp/src/test/java/org/onosproject/drivers/lisp/extensions/codec/LispTeAddressCodecTest.java b/drivers/lisp/src/test/java/org/onosproject/drivers/lisp/extensions/codec/LispTeAddressCodecTest.java
new file mode 100644
index 0000000..490061c
--- /dev/null
+++ b/drivers/lisp/src/test/java/org/onosproject/drivers/lisp/extensions/codec/LispTeAddressCodecTest.java
@@ -0,0 +1,202 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * 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.
+ */
+package org.onosproject.drivers.lisp.extensions.codec;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.google.common.collect.ImmutableList;
+import com.google.common.testing.EqualsTester;
+import org.hamcrest.Description;
+import org.hamcrest.TypeSafeDiagnosingMatcher;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onlab.packet.IpPrefix;
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.codec.impl.CodecManager;
+import org.onosproject.drivers.lisp.extensions.LispMappingExtensionCodecRegistrator;
+import org.onosproject.drivers.lisp.extensions.LispTeAddress;
+import org.onosproject.mapping.addresses.MappingAddresses;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.notNullValue;
+
+/**
+ * LISP traffic engineering address codec.
+ */
+public class LispTeAddressCodecTest {
+
+    private static final boolean LOOKUP_1 = true;
+    private static final boolean RLOC_PROBE_1 = true;
+    private static final boolean STRICT_1 = true;
+    private static final IpPrefix IPV4_ADDRESS_1 = IpPrefix.valueOf("10.1.1.1/24");
+
+    private static final boolean LOOKUP_2 = false;
+    private static final boolean RLOC_PROBE_2 = false;
+    private static final boolean STRICT_2 = false;
+    private static final IpPrefix IPV4_ADDRESS_2 = IpPrefix.valueOf("10.1.1.2/24");
+
+    private LispTeAddress.TeRecord record1;
+    private LispTeAddress.TeRecord record2;
+
+    private CodecContext context;
+    private JsonCodec<LispTeAddress> teAddressCodec;
+    private LispMappingExtensionCodecRegistrator registrator;
+
+    /**
+     * Sets up for each test.
+     * Creates a context and fetches the LispTeAddress codec.
+     */
+    @Before
+    public void setUp() {
+        CodecManager manager = new CodecManager();
+        registrator = new LispMappingExtensionCodecRegistrator();
+        registrator.codecService = manager;
+        registrator.activate();
+
+        context = new LispMappingExtensionCodecContextAdapter(registrator.codecService);
+        teAddressCodec = context.codec(LispTeAddress.class);
+        assertThat("Traffic Engineering address codec should not be null",
+                teAddressCodec, notNullValue());
+
+        record1 = new LispTeAddress.TeRecord.Builder()
+                .withIsLookup(LOOKUP_1)
+                .withIsRlocProbe(RLOC_PROBE_1)
+                .withIsStrict(STRICT_1)
+                .withRtrRlocAddress(MappingAddresses.ipv4MappingAddress(IPV4_ADDRESS_1))
+                .build();
+
+        record2 = new LispTeAddress.TeRecord.Builder()
+                .withIsLookup(LOOKUP_2)
+                .withIsRlocProbe(RLOC_PROBE_2)
+                .withIsStrict(STRICT_2)
+                .withRtrRlocAddress(MappingAddresses.ipv4MappingAddress(IPV4_ADDRESS_2))
+                .build();
+    }
+
+    /**
+     * Deactivates the codec registrator.
+     */
+    @After
+    public void tearDown() {
+        registrator.deactivate();
+    }
+
+    /**
+     * Tests encoding of a LispTeAddress object.
+     */
+    @Test
+    public void testLispTeAddressEncode() {
+
+        LispTeAddress address = new LispTeAddress.Builder()
+                .withTeRecords(ImmutableList.of(record1, record2))
+                .build();
+
+        ObjectNode addressJson = teAddressCodec.encode(address, context);
+        assertThat("errors in encoding Traffic Engineering address JSON",
+                addressJson, LispTeAddressJsonMatcher.matchesTeAddress(address));
+    }
+
+    /**
+     * Tests decoding of a LispTeAddress JSON object.
+     */
+    @Test
+    public void testLispTeAddressDecode() throws IOException {
+
+        LispTeAddress address = getLispTeAddress("LispTeAddress.json");
+
+        new EqualsTester()
+                .addEqualityGroup(address.getTeRecords().get(0), record1)
+                .addEqualityGroup(address.getTeRecords().get(1), record2).testEquals();
+    }
+
+    /**
+     * Hamcrest matcher for LispTeAddress.
+     */
+    public static final class LispTeAddressJsonMatcher
+            extends TypeSafeDiagnosingMatcher<JsonNode> {
+
+        private final LispTeAddress address;
+
+        /**
+         * Default constructor.
+         *
+         * @param address LispTeAddress object
+         */
+        private LispTeAddressJsonMatcher(LispTeAddress address) {
+            this.address = address;
+        }
+
+        private int filteredSize(JsonNode node) {
+            return node.size();
+        }
+
+        @Override
+        protected boolean matchesSafely(JsonNode jsonNode, Description description) {
+
+            // check TE records
+            final JsonNode jsonTeRecords = jsonNode.get(LispTeAddressCodec.TE_RECORDS);
+
+            if (address.getTeRecords().size() != filteredSize(jsonTeRecords)) {
+                description.appendText("TE records array size of " +
+                        Integer.toString(address.getTeRecords().size()));
+                return false;
+            }
+
+            for (int recordIndex = 0; recordIndex < jsonTeRecords.size(); recordIndex++) {
+                assertThat(jsonTeRecords.get(recordIndex),
+                        LispTeRecordJsonMatcher.matchesTeRecord(address.getTeRecords().get(recordIndex)));
+            }
+
+            return true;
+        }
+
+        @Override
+        public void describeTo(Description description) {
+            description.appendText(address.toString());
+        }
+
+        /**
+         * Factory to allocate a LispTeAddress matcher.
+         *
+         * @param address LispTeAddress object we are looking for
+         * @return matcher
+         */
+        public static LispTeAddressJsonMatcher matchesTeAddress(LispTeAddress address) {
+            return new LispTeAddressJsonMatcher(address);
+        }
+    }
+
+    /**
+     * Reads in a LispTeAddress from the given resource and decodes it.
+     *
+     * @param resourceName resource to use to read the JSON for the rule
+     * @return decoded LispTeAddress
+     * @throws IOException if processing the resource fails
+     */
+    private LispTeAddress getLispTeAddress(String resourceName) throws IOException {
+        InputStream jsonStream = LispTeAddressCodecTest.class.getResourceAsStream(resourceName);
+        JsonNode json = context.mapper().readTree(jsonStream);
+        assertThat("JSON string should not be null", json, notNullValue());
+        LispTeAddress teAddress = teAddressCodec.decode((ObjectNode) json, context);
+        assertThat("decoded address should not be null", teAddress, notNullValue());
+        return teAddress;
+    }
+}
\ No newline at end of file
diff --git a/drivers/lisp/src/test/java/org/onosproject/drivers/lisp/extensions/codec/LispTeRecordJsonMatcher.java b/drivers/lisp/src/test/java/org/onosproject/drivers/lisp/extensions/codec/LispTeRecordJsonMatcher.java
new file mode 100644
index 0000000..e964538
--- /dev/null
+++ b/drivers/lisp/src/test/java/org/onosproject/drivers/lisp/extensions/codec/LispTeRecordJsonMatcher.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2017-present Open Networking Laboratory
+ *
+ * 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.
+ */
+package org.onosproject.drivers.lisp.extensions.codec;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import org.hamcrest.Description;
+import org.hamcrest.TypeSafeDiagnosingMatcher;
+import org.onosproject.drivers.lisp.extensions.LispTeAddress;
+import org.onosproject.mapping.web.codec.MappingAddressJsonMatcher;
+
+/**
+ * Hamcrest matcher for TeRecord.
+ */
+public final class LispTeRecordJsonMatcher
+        extends TypeSafeDiagnosingMatcher<JsonNode> {
+
+    private final LispTeAddress.TeRecord record;
+
+    /**
+     * Default constructor.
+     *
+     * @param record TeRecord object
+     */
+    private LispTeRecordJsonMatcher(LispTeAddress.TeRecord record) {
+        this.record = record;
+    }
+
+    @Override
+    protected boolean matchesSafely(JsonNode jsonNode, Description description) {
+
+        // check isLookup
+        boolean jsonLookup = jsonNode.get(LispTeRecordCodec.LOOKUP).asBoolean();
+        boolean lookup = record.isLookup();
+        if (jsonLookup != lookup) {
+            description.appendText("IsLookup was " + jsonLookup);
+            return false;
+        }
+
+        // check isRlocProbe
+        boolean jsonRlocProbe = jsonNode.get(LispTeRecordCodec.RLOC_PROBE).asBoolean();
+        boolean rlocProbe = record.isRlocProbe();
+        if (jsonRlocProbe != rlocProbe) {
+            description.appendText("IsRlocProbe was " + jsonRlocProbe);
+            return false;
+        }
+
+        // check isStrict
+        boolean jsonStrict = jsonNode.get(LispTeRecordCodec.STRICT).asBoolean();
+        boolean strict = record.isStrict();
+        if (jsonStrict != strict) {
+            description.appendText("IsStrict was " + jsonStrict);
+            return false;
+        }
+
+        // check address
+        MappingAddressJsonMatcher addressMatcher =
+                MappingAddressJsonMatcher.matchesMappingAddress(record.getAddress());
+
+        return addressMatcher.matches(jsonNode.get(LispTeRecordCodec.ADDRESS));
+    }
+
+    @Override
+    public void describeTo(Description description) {
+        description.appendText(record.toString());
+    }
+
+    /**
+     * Factory to allocate a TeRecord matcher.
+     *
+     * @param record TeRecord object we are looking for
+     * @return matcher
+     */
+    public static LispTeRecordJsonMatcher matchesTeRecord(LispTeAddress.TeRecord record) {
+        return new LispTeRecordJsonMatcher(record);
+    }
+}
diff --git a/drivers/lisp/src/test/resources/org/onosproject/drivers/lisp/extensions/codec/LispTeAddress.json b/drivers/lisp/src/test/resources/org/onosproject/drivers/lisp/extensions/codec/LispTeAddress.json
new file mode 100644
index 0000000..1cc7fe2
--- /dev/null
+++ b/drivers/lisp/src/test/resources/org/onosproject/drivers/lisp/extensions/codec/LispTeAddress.json
@@ -0,0 +1,22 @@
+{
+  "records": [
+    {
+      "lookup": true,
+      "rlocProbe": true,
+      "strict": true,
+      "address": {
+        "type": "IPV4",
+        "ipv4": "10.1.1.1/24"
+      }
+    },
+    {
+      "lookup": false,
+      "rlocProbe": false,
+      "strict": false,
+      "address": {
+        "type": "IPV4",
+        "ipv4": "10.1.1.2/24"
+      }
+    }
+  ]
+}
\ No newline at end of file