[ONOS-4945] PCE Json fix

Change-Id: I701ed1044c603ea60becf8ba606098e4154a7733
diff --git a/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/PceCodecRegistrator.java b/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/PceCodecRegistrator.java
new file mode 100644
index 0000000..685d330
--- /dev/null
+++ b/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/PceCodecRegistrator.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2016-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.pcerest;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onosproject.codec.CodecService;
+import org.onosproject.pce.pceservice.PcePath;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Implementation of the json codec brokering service for pce app.
+ */
+@Component(immediate = true)
+public class PceCodecRegistrator {
+
+    private static Logger log = LoggerFactory.getLogger(PceCodecRegistrator.class);
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected CodecService codecService;
+
+    @Activate
+    public void activate() {
+        codecService.registerCodec(PcePath.class, new PcePathCodec());
+        log.info("Started");
+    }
+
+    @Deactivate
+    public void deactivate() {
+        log.info("Stopped");
+    }
+}
diff --git a/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/PcePathCodec.java b/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/PcePathCodec.java
new file mode 100644
index 0000000..034d045
--- /dev/null
+++ b/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/PcePathCodec.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright 2016-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.pcerest;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import org.onosproject.codec.CodecContext;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.pce.pceservice.PcePath;
+import org.onosproject.pce.pceservice.DefaultPcePath;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.fasterxml.jackson.databind.JsonNode;
+
+/**
+ * PCE path json codec.
+ */
+public final class PcePathCodec extends JsonCodec<PcePath> {
+    private final Logger log = LoggerFactory.getLogger(PcePathCodec.class);
+    private static final String SOURCE = "source";
+    private static final String DESTINATION = "destination";
+    private static final String LSP_TYPE = "pathType";
+    private static final String SYMBOLIC_PATH_NAME = "name";
+    private static final String CONSTRAINT = "constraint";
+    private static final String COST = "cost";
+    private static final String BANDWIDTH = "bandwidth";
+    private static final String PATH_ID = "pathId";
+    private static final String MISSING_MEMBER_MESSAGE = " member is required in pce-path";
+
+    @Override
+    public PcePath decode(ObjectNode json, CodecContext context) {
+        if (json == null || !json.isObject()) {
+            log.error("Empty json input");
+            return null;
+        }
+
+        // build pce-path
+        PcePath.Builder resultBuilder = new DefaultPcePath.Builder();
+
+        // retrieve source
+        JsonNode jNode = json.get(SOURCE);
+        if (jNode != null) {
+            String src = jNode.asText();
+            resultBuilder.source(src);
+        }
+
+        // retrieve destination
+        jNode = json.get(DESTINATION);
+        if (jNode != null) {
+            String dst = jNode.asText();
+            resultBuilder.destination(dst);
+        }
+
+        // retrieve lsp-type
+        jNode = json.get(LSP_TYPE);
+        if (jNode != null) {
+            String lspType = jNode.asText();
+            resultBuilder.lspType(lspType);
+        }
+
+        // retrieve symbolic-path-name
+        jNode = json.get(SYMBOLIC_PATH_NAME);
+        if (jNode != null) {
+            String name = jNode.asText();
+            resultBuilder.name(name);
+        }
+
+        // retrieve constraint
+        JsonNode constraintJNode = (JsonNode) json.path(CONSTRAINT);
+        if ((constraintJNode != null) && (!constraintJNode.isMissingNode())) {
+            // retrieve cost
+            jNode = constraintJNode.get(COST);
+            if (jNode != null) {
+                String cost = jNode.asText();
+                resultBuilder.costConstraint(cost);
+            }
+
+            // retrieve bandwidth
+            jNode = constraintJNode.get(BANDWIDTH);
+            if (jNode != null) {
+                String bandwidth = jNode.asText();
+                resultBuilder.bandwidthConstraint(bandwidth);
+            }
+        }
+
+        return resultBuilder.build();
+    }
+
+    @Override
+    public ObjectNode encode(PcePath path, CodecContext context) {
+        checkNotNull(path, "path output cannot be null");
+        ObjectNode result = context.mapper()
+                .createObjectNode()
+                .put(PATH_ID, path.id().id())
+                .put(SOURCE, path.source())
+                .put(DESTINATION, path.destination())
+                .put(LSP_TYPE, path.lspType().type())
+                .put(SYMBOLIC_PATH_NAME, path.name());
+
+        ObjectNode constraintNode = context.mapper()
+                .createObjectNode()
+                .put(COST, path.costConstraint().toString())
+                .put(BANDWIDTH, path.bandwidthConstraint().toString());
+
+        result.set(CONSTRAINT, constraintNode);
+        return result;
+    }
+}
diff --git a/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/PcePathWebResource.java b/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/PcePathWebResource.java
new file mode 100644
index 0000000..1b7c48b
--- /dev/null
+++ b/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/PcePathWebResource.java
@@ -0,0 +1,203 @@
+/*
+ * Copyright 2016-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.pcerest;
+
+import static javax.ws.rs.core.Response.Status.OK;
+import static org.onlab.util.Tools.nullIsNotFound;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.List;
+import java.util.LinkedList;
+
+import javax.ws.rs.Consumes;
+import javax.ws.rs.DELETE;
+import javax.ws.rs.GET;
+import javax.ws.rs.POST;
+import javax.ws.rs.PUT;
+import javax.ws.rs.Path;
+import javax.ws.rs.PathParam;
+import javax.ws.rs.Produces;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+
+import org.onosproject.incubator.net.tunnel.Tunnel;
+import org.onosproject.incubator.net.tunnel.TunnelId;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.intent.Constraint;
+import org.onosproject.pce.pceservice.api.PceService;
+import org.onosproject.pce.pceservice.PcePath;
+import org.onosproject.pce.pceservice.DefaultPcePath;
+import org.onosproject.pce.pceservice.LspType;
+import org.onosproject.rest.AbstractWebResource;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+/**
+ * Query and program pce path.
+ */
+@Path("path")
+public class PcePathWebResource extends AbstractWebResource {
+
+    private final Logger log = LoggerFactory.getLogger(PcePathWebResource.class);
+    public static final String PCE_PATH_NOT_FOUND = "Path not found";
+    public static final String PCE_PATH_ID_EXIST = "Path exists";
+    public static final String PCE_PATH_ID_NOT_EXIST = "Path does not exist for the identifier";
+    public static final String PCE_SETUP_PATH_FAILED = "PCE Setup path has failed.";
+
+    /**
+     * Retrieve details of all paths created.
+     *
+     * @return 200 OK
+     */
+    @GET
+    @Produces(MediaType.APPLICATION_JSON)
+    @Consumes(MediaType.APPLICATION_JSON)
+    public Response queryAllPath() {
+        log.debug("Query all paths.");
+        Iterable<Tunnel> tunnels = get(PceService.class).queryAllPath();
+        ObjectNode result = mapper().createObjectNode();
+        ArrayNode pathEntry = result.putArray("paths");
+        if (tunnels != null) {
+            for (final Tunnel tunnel : tunnels) {
+                PcePath path = DefaultPcePath.builder().of(tunnel).build();
+                pathEntry.add(codec(PcePath.class).encode(path, this));
+            }
+        }
+        return ok(result.toString()).build();
+    }
+
+    /**
+     * Retrieve details of a specified path id.
+     *
+     * @param id path id
+     * @return 200 OK, 404 if given identifier does not exist
+     */
+    @GET
+    @Path("{path_id}")
+    @Produces(MediaType.APPLICATION_JSON)
+    @Consumes(MediaType.APPLICATION_JSON)
+    public Response queryPath(@PathParam("path_id") String id) {
+        log.debug("Query path by identifier {}.", id);
+        Tunnel tunnel = nullIsNotFound(get(PceService.class).queryPath(TunnelId.valueOf(id)),
+                                       PCE_PATH_NOT_FOUND);
+        PcePath path = DefaultPcePath.builder().of(tunnel).build();
+        ObjectNode result = mapper().createObjectNode();
+        result.set("path", codec(PcePath.class).encode(path, this));
+        return ok(result.toString()).build();
+    }
+
+    /**
+     * Creates a new path.
+     *
+     * @param stream pce path from json
+     * @return status of the request
+     */
+    @POST
+    @Consumes(MediaType.APPLICATION_JSON)
+    @Produces(MediaType.APPLICATION_JSON)
+    public Response setupPath(InputStream stream) {
+        log.debug("Setup path.");
+        try {
+            ObjectNode jsonTree = (ObjectNode) mapper().readTree(stream);
+            JsonNode port = jsonTree.get("path");
+            PcePath path = codec(PcePath.class).decode((ObjectNode) port, this);
+
+            DeviceId srcDevice = DeviceId.deviceId(path.source());
+            DeviceId dstDevice = DeviceId.deviceId(path.destination());
+            LspType lspType = path.lspType();
+            List<Constraint> listConstrnt = new LinkedList<Constraint>();
+
+            // Add bandwidth
+            listConstrnt.add(path.bandwidthConstraint());
+
+            // Add cost
+            listConstrnt.add(path.costConstraint());
+
+            Boolean issuccess = nullIsNotFound(get(PceService.class)
+                                               .setupPath(srcDevice, dstDevice, path.name(), listConstrnt, lspType),
+                                               PCE_SETUP_PATH_FAILED);
+            return Response.status(OK).entity(issuccess.toString()).build();
+        } catch (IOException e) {
+            log.error("Exception while creating path {}.", e.toString());
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    /**
+     * Update details of a specified path id.
+     *
+     * @param id path id
+     * @param stream pce path from json
+     * @return 200 OK, 404 if given identifier does not exist
+     */
+    @PUT
+    @Path("{path_id}")
+    @Produces(MediaType.APPLICATION_JSON)
+    @Consumes(MediaType.APPLICATION_JSON)
+    public Response updatePath(@PathParam("path_id") String id,
+            final InputStream stream) {
+        log.debug("Update path by identifier {}.", id);
+        try {
+            ObjectNode jsonTree = (ObjectNode) mapper().readTree(stream);
+            JsonNode pathNode = jsonTree.get("path");
+            PcePath path = codec(PcePath.class).decode((ObjectNode) pathNode, this);
+            List<Constraint> constrntList = new LinkedList<Constraint>();
+            // Assign bandwidth
+            if (path.bandwidthConstraint() != null) {
+                constrntList.add(path.bandwidthConstraint());
+            }
+
+            // Assign cost
+            if (path.costConstraint() != null) {
+                constrntList.add(path.costConstraint());
+            }
+
+            Boolean result = nullIsNotFound(get(PceService.class).updatePath(TunnelId.valueOf(id), constrntList),
+                                            PCE_PATH_NOT_FOUND);
+            return Response.status(OK).entity(result.toString()).build();
+        } catch (IOException e) {
+            log.error("Update path failed because of exception {}.", e.toString());
+            throw new IllegalArgumentException(e);
+        }
+    }
+
+    /**
+     * Release a specified path.
+     *
+     * @param id path id
+     * @return 200 OK, 404 if given identifier does not exist
+     */
+    @DELETE
+    @Path("{path_id}")
+    @Produces(MediaType.APPLICATION_JSON)
+    @Consumes(MediaType.APPLICATION_JSON)
+    public Response releasePath(@PathParam("path_id") String id) {
+        log.debug("Deletes path by identifier {}.", id);
+
+        Boolean isSuccess = nullIsNotFound(get(PceService.class).releasePath(TunnelId.valueOf(id)),
+                                           PCE_PATH_NOT_FOUND);
+        if (!isSuccess) {
+            log.debug("Path identifier {} does not exist", id);
+        }
+
+        return Response.status(OK).entity(isSuccess.toString()).build();
+    }
+}
diff --git a/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/PceWebApplication.java b/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/PceWebApplication.java
new file mode 100644
index 0000000..09fc42a
--- /dev/null
+++ b/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/PceWebApplication.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2016-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.pcerest;
+
+import org.onlab.rest.AbstractWebApplication;
+
+import java.util.Set;
+
+/**
+ * PCE rest api web application.
+ */
+public class PceWebApplication extends AbstractWebApplication {
+    @Override
+    public Set<Class<?>> getClasses() {
+        return getClasses(PcePathWebResource.class);
+    }
+}
+
diff --git a/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/package-info.java b/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/package-info.java
new file mode 100644
index 0000000..3cc04cd
--- /dev/null
+++ b/apps/pce/pcerest/src/main/java/org/onosproject/pcerest/package-info.java
@@ -0,0 +1,21 @@
+/*
+ * Copyright 2016-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.
+ */
+
+/**
+ * PCE rest application.
+ */
+
+package org.onosproject.pcerest;
diff --git a/apps/pce/pcerest/src/main/resources/WEB-INF/web.xml b/apps/pce/pcerest/src/main/resources/WEB-INF/web.xml
new file mode 100644
index 0000000..66dc27a
--- /dev/null
+++ b/apps/pce/pcerest/src/main/resources/WEB-INF/web.xml
@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright 2016-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.
+  -->
+<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee"
+         xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
+         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
+         id="ONOS" version="2.5">
+    <display-name>PCE REST API v1.0</display-name>
+
+    <servlet>
+        <servlet-name>JAX-RS Service</servlet-name>
+        <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
+        <init-param>
+            <param-name>javax.ws.rs.Application</param-name>
+            <param-value>org.onosproject.pcerest.PceWebApplication</param-value>
+        </init-param>
+        <load-on-startup>1</load-on-startup>
+    </servlet>
+
+    <servlet-mapping>
+        <servlet-name>JAX-RS Service</servlet-name>
+        <url-pattern>/*</url-pattern>
+    </servlet-mapping>
+</web-app>