Revert "[ONOS-5187] Compute path with Explicit path objects"

This reverts commit a32f6da9cea107b5a2c8d95c2566e1f1af1a7cce.

Change-Id: Ic023d701d18f0ae7af2579bc43777714a0e701dc
diff --git a/apps/pce/app/src/main/java/org/onosproject/pce/cli/PceQueryPathCommand.java b/apps/pce/app/src/main/java/org/onosproject/pce/cli/PceQueryPathCommand.java
index 8994f47..09a396e 100644
--- a/apps/pce/app/src/main/java/org/onosproject/pce/cli/PceQueryPathCommand.java
+++ b/apps/pce/app/src/main/java/org/onosproject/pce/cli/PceQueryPathCommand.java
@@ -24,13 +24,10 @@
 import org.onosproject.incubator.net.tunnel.Tunnel;
 import org.onosproject.incubator.net.tunnel.TunnelId;
 import org.onosproject.net.AnnotationKeys;
-import org.onosproject.pce.pceservice.ExplicitPathInfo;
 import org.onosproject.pce.pceservice.api.PceService;
 
 import org.slf4j.Logger;
 
-import java.util.List;
-
 /**
  * Supports quering PCE path.
  */
@@ -75,28 +72,17 @@
      * @param tunnel pce tunnel
      */
     void display(Tunnel tunnel) {
-        List<ExplicitPathInfo> explicitPathInfoList = AbstractShellCommand.get(PceService.class)
-                .explicitPathInfoList(tunnel.tunnelName().value());
-
-        print("\npath-id                  : %s \n" +
-                "source                   : %s \n" +
-                "destination              : %s \n" +
-                "path-type                : %s \n" +
-                "symbolic-path-name       : %s \n" +
+        print("\npath-id            : %s \n" +
+                "source             : %s \n" +
+                "destination        : %s \n" +
+                "path-type          : %s \n" +
+                "symbolic-path-name : %s \n" +
                 "constraints:            \n" +
-                "   cost                  : %s \n" +
-                "   bandwidth             : %s",
+                "   cost            : %s \n" +
+                "   bandwidth       : %s",
                 tunnel.tunnelId().id(), tunnel.path().src().deviceId().toString(),
                 tunnel.path().dst().deviceId().toString(),
                 tunnel.type().name(), tunnel.tunnelName(), tunnel.annotations().value(COST_TYPE),
                 tunnel.annotations().value(AnnotationKeys.BANDWIDTH));
-        if (explicitPathInfoList != null) {
-            for (ExplicitPathInfo e : explicitPathInfoList) {
-                print("explicitPathObjects      : \n" +
-                      "    type                 : %s \n" +
-                      "    value                : %s ",
-                      String.valueOf(e.type().type()), e.value().toString());
-            }
-        }
     }
 }
diff --git a/apps/pce/app/src/main/java/org/onosproject/pce/cli/PceSetupPathCommand.java b/apps/pce/app/src/main/java/org/onosproject/pce/cli/PceSetupPathCommand.java
index 149b37a..7bd7970 100644
--- a/apps/pce/app/src/main/java/org/onosproject/pce/cli/PceSetupPathCommand.java
+++ b/apps/pce/app/src/main/java/org/onosproject/pce/cli/PceSetupPathCommand.java
@@ -15,35 +15,27 @@
  */
 package org.onosproject.pce.cli;
 
-import static org.onosproject.net.Link.State.ACTIVE;
-import static org.onosproject.net.Link.Type.DIRECT;
 import static org.slf4j.LoggerFactory.getLogger;
 
 import java.util.Collection;
 import java.util.List;
 import java.util.LinkedList;
 
-import com.google.common.collect.Lists;
-
 import org.apache.karaf.shell.commands.Argument;
 import org.apache.karaf.shell.commands.Command;
 import org.apache.karaf.shell.commands.Option;
+
 import org.onlab.util.DataRateUnit;
 import org.onosproject.cli.AbstractShellCommand;
 import org.onosproject.incubator.net.tunnel.Tunnel;
 import org.onosproject.incubator.net.tunnel.TunnelService;
-import org.onosproject.net.ConnectPoint;
-import org.onosproject.net.DefaultLink;
 import org.onosproject.net.DeviceId;
-import org.onosproject.net.NetworkResource;
-import org.onosproject.net.PortNumber;
 import org.onosproject.net.intent.constraint.BandwidthConstraint;
 import org.onosproject.net.intent.Constraint;
-import org.onosproject.net.provider.ProviderId;
-import org.onosproject.pce.pceservice.ExplicitPathInfo;
 import org.onosproject.pce.pceservice.constraint.CostConstraint;
 import org.onosproject.pce.pceservice.LspType;
 import org.onosproject.pce.pceservice.api.PceService;
+
 import org.slf4j.Logger;
 
 /**
@@ -52,16 +44,6 @@
 @Command(scope = "onos", name = "pce-setup-path", description = "Supports creating pce path.")
 public class PceSetupPathCommand extends AbstractShellCommand {
     private final Logger log = getLogger(getClass());
-    public static final byte SUBTYPE_DEVICEID = 0;
-    public static final byte SUBTYPE_LINK = 1;
-    public static final byte SUBTYPE_INDEX = 1;
-    public static final byte TYPE_INDEX = 0;
-
-    public static final byte DEVICEID_INDEX = 2;
-    public static final byte SOURCE_DEVICEID_INDEX = 2;
-    public static final byte SOURCE_PORTNO_INDEX = 3;
-    public static final byte DESTINATION_DEVICEID_INDEX = 4;
-    public static final byte DESTINATION_PORTNO_INDEX = 5;
 
     @Argument(index = 0, name = "src", description = "source device.", required = true, multiValued = false)
     String src = null;
@@ -87,15 +69,6 @@
             + "Data rate unit is in BPS.", required = false, multiValued = false)
     double bandwidth = 0.0;
 
-    @Option(name = "-e", aliases = "--explicitPathObjects", description = "List of strict and loose hopes",
-            required = false, multiValued = true)
-    String[] explicitPathInfoStrings;
-
-    //explicitPathInfo format : Type/SubType/Value(DeviceId or Link info)
-    //If Value is Device : Type/SubType/deviceId
-    //If Value is Link : Type/SubType/SourceDeviceId/SourcePortNo/DestinationDeviceId/DestinationPortNo
-    List<ExplicitPathInfo> explicitPathInfo = Lists.newLinkedList();
-
     @Override
     protected void execute() {
         log.info("executing pce-setup-path");
@@ -141,50 +114,7 @@
         CostConstraint.Type costType = CostConstraint.Type.values()[cost - 1];
         listConstrnt.add(CostConstraint.of(costType));
 
-        if (explicitPathInfoStrings != null)  {
-            for (String str : explicitPathInfoStrings) {
-                String[] splitted = str.split("/");
-                DeviceId deviceId;
-                NetworkResource res = null;
-                PortNumber portNo;
-                int explicitPathType = Integer.parseInt(splitted[TYPE_INDEX]);
-                if ((explicitPathType < 0) || (explicitPathType > 1)) {
-                    error("Explicit path validation failed");
-                    return;
-                }
-
-                //subtype 0 = deviceId, 1 = link
-                //subtype is required to store either as deviceId or Link
-                if (splitted[DEVICEID_INDEX] != null && Integer.parseInt(splitted[SUBTYPE_INDEX]) == SUBTYPE_DEVICEID) {
-                    res = DeviceId.deviceId(splitted[DEVICEID_INDEX]);
-                } else if (Integer.parseInt(splitted[SUBTYPE_INDEX]) == SUBTYPE_LINK
-                        && splitted[SOURCE_DEVICEID_INDEX] != null
-                        && splitted[SOURCE_PORTNO_INDEX] != null
-                        && splitted[DESTINATION_DEVICEID_INDEX] != null
-                        && splitted[DESTINATION_PORTNO_INDEX] != null) {
-
-                    deviceId = DeviceId.deviceId(splitted[SOURCE_DEVICEID_INDEX]);
-                    portNo = PortNumber.portNumber(splitted[SOURCE_PORTNO_INDEX]);
-                    ConnectPoint cpSrc = new ConnectPoint(deviceId, portNo);
-                    deviceId = DeviceId.deviceId(splitted[DESTINATION_DEVICEID_INDEX]);
-                    portNo = PortNumber.portNumber(splitted[DESTINATION_PORTNO_INDEX]);
-                    ConnectPoint cpDst = new ConnectPoint(deviceId, portNo);
-                    res = DefaultLink.builder()
-                            .providerId(ProviderId.NONE)
-                            .src(cpSrc)
-                            .dst(cpDst)
-                            .type(DIRECT)
-                            .state(ACTIVE)
-                            .build();
-                } else {
-                    error("Explicit path validation failed");
-                    return;
-                }
-                ExplicitPathInfo obj = new ExplicitPathInfo(ExplicitPathInfo.Type.values()[explicitPathType], res);
-                explicitPathInfo.add(obj);
-            }
-        }
-        if (!service.setupPath(srcDevice, dstDevice, name, listConstrnt, lspType, explicitPathInfo)) {
+        if (!service.setupPath(srcDevice, dstDevice, name, listConstrnt, lspType)) {
             error("Path creation failed.");
         }
     }
diff --git a/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/DefaultPcePath.java b/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/DefaultPcePath.java
index bcc12ec..10acd0a 100644
--- a/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/DefaultPcePath.java
+++ b/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/DefaultPcePath.java
@@ -18,18 +18,14 @@
 
 import static com.google.common.base.MoreObjects.toStringHelper;
 
-import java.util.Collection;
-import java.util.List;
 import java.util.Objects;
 
-import org.onlab.rest.BaseResource;
 import org.onlab.util.DataRateUnit;
 import org.onosproject.incubator.net.tunnel.Tunnel;
 import org.onosproject.incubator.net.tunnel.TunnelId;
 import org.onosproject.net.intent.constraint.BandwidthConstraint;
 import org.onosproject.net.intent.Constraint;
 import org.onosproject.pce.pceservice.constraint.CostConstraint;
-import org.onosproject.pce.pcestore.api.PceStore;
 
 /**
  * Implementation of an entity which provides functionalities of pce path.
@@ -43,7 +39,6 @@
     private String name; // symbolic-path-name
     private Constraint costConstraint; // cost constraint
     private Constraint bandwidthConstraint; // bandwidth constraint
-    private Collection<ExplicitPathInfo> explicitPathInfo; //list of explicit path info
 
     /**
      * Initializes PCE path attributes.
@@ -55,11 +50,10 @@
      * @param name symbolic-path-name
      * @param costConstrnt cost constraint
      * @param bandwidthConstrnt bandwidth constraint
-     * @param explicitPathInfo list of explicit path info
      */
     private DefaultPcePath(TunnelId id, String src, String dst, LspType lspType,
-                           String name, Constraint costConstrnt, Constraint bandwidthConstrnt,
-                           Collection<ExplicitPathInfo> explicitPathInfo) {
+                           String name, Constraint costConstrnt, Constraint bandwidthConstrnt) {
+
         this.id = id;
         this.source = src;
         this.destination = dst;
@@ -67,7 +61,6 @@
         this.name = name;
         this.costConstraint = costConstrnt;
         this.bandwidthConstraint = bandwidthConstrnt;
-        this.explicitPathInfo = explicitPathInfo;
     }
 
     @Override
@@ -121,11 +114,6 @@
     }
 
     @Override
-    public Collection<ExplicitPathInfo> explicitPathInfo() {
-        return explicitPathInfo;
-    }
-
-    @Override
     public PcePath copy(PcePath path) {
         if (null != path.source()) {
             this.source = path.source();
@@ -150,8 +138,7 @@
 
     @Override
     public int hashCode() {
-        return Objects.hash(id, source, destination, lspType, name, costConstraint, bandwidthConstraint,
-                explicitPathInfo);
+        return Objects.hash(id, source, destination, lspType, name, costConstraint, bandwidthConstraint);
     }
 
     @Override
@@ -167,8 +154,7 @@
                     && Objects.equals(lspType, that.lspType)
                     && Objects.equals(name, that.name)
                     && Objects.equals(costConstraint, that.costConstraint)
-                    && Objects.equals(bandwidthConstraint, that.bandwidthConstraint)
-                    && Objects.equals(explicitPathInfo, that.explicitPathInfo);
+                    && Objects.equals(bandwidthConstraint, that.bandwidthConstraint);
         }
         return false;
     }
@@ -184,7 +170,6 @@
                 .add("name", name)
                 .add("costConstraint", costConstraint)
                 .add("bandwidthConstraint", bandwidthConstraint)
-                .add("explicitPathInfo", explicitPathInfo)
                 .toString();
     }
 
@@ -200,7 +185,7 @@
     /**
      * Builder class for pce path.
      */
-    public static final class Builder extends BaseResource implements PcePath.Builder {
+    public static final class Builder implements PcePath.Builder {
         private TunnelId id;
         private String source;
         private String destination;
@@ -208,7 +193,6 @@
         private String name;
         private Constraint costConstraint;
         private Constraint bandwidthConstraint;
-        private Collection<ExplicitPathInfo> explicitPathInfo;
 
         @Override
         public Builder id(String id) {
@@ -256,12 +240,6 @@
         }
 
         @Override
-        public Builder explicitPathInfo(Collection<ExplicitPathInfo> explicitPathInfo) {
-            this.explicitPathInfo = explicitPathInfo;
-            return this;
-        }
-
-        @Override
         public Builder of(Tunnel tunnel) {
             this.id = TunnelId.valueOf(tunnel.tunnelId().id());
             this.source = tunnel.path().src().deviceId().toString();
@@ -286,20 +264,13 @@
                                                                   DataRateUnit.valueOf("BPS"));
             }
 
-            PceStore pceStore = get(PceStore.class);
-            List<ExplicitPathInfo> explicitPathInfoList = pceStore
-                    .getTunnelNameExplicitPathInfoMap(tunnel.tunnelName().value());
-            if (explicitPathInfoList != null) {
-                this.explicitPathInfo = explicitPathInfoList;
-            }
-
             return this;
         }
 
         @Override
         public PcePath build() {
             return new DefaultPcePath(id, source, destination, lspType, name,
-                                      costConstraint, bandwidthConstraint, explicitPathInfo);
+                                      costConstraint, bandwidthConstraint);
         }
     }
 }
diff --git a/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/ExplicitPathInfo.java b/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/ExplicitPathInfo.java
deleted file mode 100644
index 52ef270..0000000
--- a/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/ExplicitPathInfo.java
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- * 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.pce.pceservice;
-
-import org.onosproject.net.NetworkResource;
-
-import com.google.common.annotations.Beta;
-
-import java.util.Objects;
-
-/**
- * Representation of explicit path info consists of contraints (strict / loose) to compute path.
- */
-@Beta
-public final class ExplicitPathInfo {
-
-    private final Type type;
-
-    //Can be Link or DeviceId
-    private final NetworkResource value;
-
-    public enum Type {
-        /**
-         * Signifies that path includes strict node or link.
-         */
-        STRICT(0),
-
-        /**
-         * Signifies that path includes loose node or link.
-         */
-        LOOSE(1);
-
-        int value;
-
-        /**
-         * Assign val with the value as the type.
-         *
-         * @param val type
-         */
-        Type(int val) {
-            value = val;
-        }
-
-        /**
-         * Returns value of type.
-         *
-         * @return type
-         */
-        public byte type() {
-            return (byte) value;
-        }
-    }
-
-    /**
-     * Creates instance of explicit path object.
-     *
-     * @param type specifies whether strict or loose node/link
-     * @param value specifies deviceId or link
-     */
-    public ExplicitPathInfo(Type type, NetworkResource value) {
-        this.type = type;
-        this.value = value;
-    }
-
-    /**
-     * Returns explicit path type.
-     *
-     * @return explicit path type as strict/loose
-     */
-    public Type type() {
-        return type;
-    }
-
-    /**
-     * Returns deviceId or link.
-     *
-     * @return deviceId or link
-     */
-    public NetworkResource value() {
-        return value;
-    }
-
-    @Override
-    public int hashCode() {
-        return Objects.hash(type, value);
-    }
-
-    @Override
-    public boolean equals(Object obj) {
-        if (this == obj) {
-            return true;
-        }
-        if (obj instanceof ExplicitPathInfo) {
-            final ExplicitPathInfo other = (ExplicitPathInfo) obj;
-            return Objects.equals(this.type, other.type)
-                    && Objects.equals(this.value, other.value);
-        }
-        return false;
-    }
-}
diff --git a/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/PceManager.java b/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/PceManager.java
index 9267dc2..a4c2aa6 100644
--- a/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/PceManager.java
+++ b/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/PceManager.java
@@ -24,7 +24,6 @@
 import java.util.List;
 import java.util.Optional;
 import java.util.Set;
-
 import org.apache.felix.scr.annotations.Activate;
 import org.apache.felix.scr.annotations.Component;
 import org.apache.felix.scr.annotations.Deactivate;
@@ -49,11 +48,9 @@
 import org.onosproject.net.config.NetworkConfigService;
 import org.onosproject.net.DefaultAnnotations;
 import org.onosproject.net.DefaultAnnotations.Builder;
-import org.onosproject.net.DefaultPath;
 import org.onosproject.net.Device;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.Link;
-import org.onosproject.net.NetworkResource;
 import org.onosproject.net.Path;
 import org.onosproject.net.device.DeviceService;
 import org.onosproject.net.intent.Constraint;
@@ -89,7 +86,6 @@
 
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.ImmutableSet;
-import com.google.common.collect.Sets;
 
 import static org.onosproject.incubator.net.tunnel.Tunnel.State.INIT;
 import static org.onosproject.incubator.net.tunnel.Tunnel.State.UNSTABLE;
@@ -234,177 +230,10 @@
         return ImmutableSet.of();
     }
 
-    //Computes the partial path from partial computed path to specified dst.
-    private List<Path> computePartialPath(List<Path> computedPath, DeviceId src, DeviceId dst,
-                                    List<Constraint> constraints) {
-        int size = computedPath.size();
-        Path path = null;
-        DeviceId deviceId = size == 0 ? src :
-                computedPath.get(size - 1).dst().deviceId();
-
-        Set<Path> tempComputePath = computePath(deviceId, dst, constraints);
-        if (tempComputePath.isEmpty()) {
-            return null;
-        }
-
-        //if path validation fails return null
-        //Validate computed path to avoid loop in the path
-        for (Path p : tempComputePath) {
-            if (pathValidation(computedPath, p)) {
-                path = p;
-                break;
-            }
-        }
-        if (path == null) {
-            return null;
-        }
-
-        //Store the partial path result in a list
-        computedPath.add(path);
-        return computedPath;
-    }
-
-    private List<DeviceId> createListOfDeviceIds(List<? extends NetworkResource> list) {
-        List<Link> links = new LinkedList<>();
-        if (!list.isEmpty() && list.iterator().next() instanceof Path) {
-            for (Path path : (List<Path>) list) {
-                links.addAll(path.links());
-            }
-        } else if (!list.isEmpty() && list.iterator().next() instanceof Link) {
-            links.addAll((List<Link>) list);
-        }
-
-        //List of devices for new path computed
-        DeviceId source = null;
-        DeviceId destination = null;
-        List<DeviceId> devList = new LinkedList<>();
-
-        for (Link l : links) {
-            if (!devList.contains(l.src().deviceId())) {
-                devList.add(l.src().deviceId());
-            }
-            if (!devList.contains(l.dst().deviceId())) {
-                devList.add(l.dst().deviceId());
-            }
-        }
-
-        return devList;
-    }
-
-    //To dectect loops in the path i.e if the partial paths has intersection node avoid it.
-    private boolean pathValidation(List<Path> partialPath, Path path) {
-
-        //List of devices in new path computed
-        List<DeviceId> newPartialPathDevList;
-        newPartialPathDevList = createListOfDeviceIds(path.links());
-
-        //List of devices in partial computed path
-        List<DeviceId> partialComputedPathDevList;
-        partialComputedPathDevList = createListOfDeviceIds(partialPath);
-
-        for (DeviceId deviceId : newPartialPathDevList) {
-            for (DeviceId devId : partialComputedPathDevList) {
-                if (!newPartialPathDevList.get(0).equals(deviceId) &&
-                        !partialComputedPathDevList.get(partialComputedPathDevList.size() - 1).equals(devId)
-                        && deviceId.equals(devId)) {
-                    return false;
-                }
-            }
-        }
-
-        return true;
-    }
-
-    //Returns final computed explicit path (list of partial computed paths).
-    private List<Path> computeExplicitPath(List<ExplicitPathInfo> explicitPathInfo, DeviceId src, DeviceId dst,
-            List<Constraint> constraints) {
-        List<Path> finalComputedPath = new LinkedList<>();
-        for (ExplicitPathInfo info : explicitPathInfo) {
-            /*
-             * If explicit path object is LOOSE,
-             * 1) If specified as DeviceId (node) :
-             * If it is source , compute from source to destination (partial computation not required),
-             * otherwise compute from specified source to specified device
-             * 2) If specified as Link :
-             * Compute partial path from source to link's source , if path exists compute from link's source to dst
-             */
-            if (info.type().equals(ExplicitPathInfo.Type.LOOSE)) {
-                if (info.value() instanceof DeviceId) {
-                    // If deviceId is source no need to compute
-                    if (!(info.value()).equals(src)) {
-                        finalComputedPath = computePartialPath(finalComputedPath, src, (DeviceId) info.value(),
-                                constraints);
-                    }
-
-                } else if (info.value() instanceof Link) {
-                    if ((((Link) info.value()).src().deviceId().equals(src))
-                            || (!finalComputedPath.isEmpty()
-                            && finalComputedPath.get(finalComputedPath.size() - 1).dst().equals(
-                                    ((Link) info.value()).src().deviceId()))) {
-
-                        finalComputedPath = computePartialPath(finalComputedPath, src, ((Link) info.value()).dst()
-                                .deviceId(), constraints);
-                    } else {
-
-                        finalComputedPath = computePartialPath(finalComputedPath, src, ((Link) info.value()).src()
-                                .deviceId(), constraints) != null ? computePartialPath(finalComputedPath, src,
-                                ((Link) info.value()).dst().deviceId(), constraints) : null;
-                    }
-                }
-                /*
-                 * If explicit path object is STRICT,
-                 * 1) If specified as DeviceId (node) :
-                 * Check whether partial computed path has reachable to strict specified node or
-                 * strict node is the source, if no set path as null else do nothing
-                 * 2) If specified as Link :
-                 * Check whether partial computed path has reachable to strict link's src, if yes compute
-                 * path from strict link's src to link's dst (to include specified link)
-                 */
-            } else if (info.type().equals(ExplicitPathInfo.Type.STRICT)) {
-                if (info.value() instanceof DeviceId) {
-                    if (!(!finalComputedPath.isEmpty() && finalComputedPath.get(finalComputedPath.size() - 1).dst()
-                            .deviceId().equals(info.value()))
-                            && !info.value().equals(src)) {
-                        finalComputedPath = null;
-                    }
-
-                } else if (info.value() instanceof Link) {
-
-                    finalComputedPath = ((Link) info.value()).src().deviceId().equals(src)
-                            || !finalComputedPath.isEmpty()
-                            && finalComputedPath.get(finalComputedPath.size() - 1).dst().deviceId()
-                                    .equals(((Link) info.value()).src().deviceId()) ? computePartialPath(
-                            finalComputedPath, src, ((Link) info.value()).dst().deviceId(), constraints) : null;
-
-                }
-            }
-            if (finalComputedPath == null) {
-                return null;
-            }
-        }
-        // Destination is not reached in Partial computed path then compute till destination
-        if (finalComputedPath.isEmpty() || !finalComputedPath.isEmpty()
-                && !finalComputedPath.get(finalComputedPath.size() - 1).dst().deviceId().equals(dst)) {
-
-            finalComputedPath = computePartialPath(finalComputedPath, src, dst, constraints);
-            if (finalComputedPath == null) {
-                return null;
-            }
-        }
-
-        return finalComputedPath;
-    }
-
-    @Override
-    public boolean setupPath(DeviceId src, DeviceId dst, String tunnelName, List<Constraint> constraints,
-                             LspType lspType) {
-        return setupPath(src, dst, tunnelName, constraints, lspType, null);
-    }
-
     //[TODO:] handle requests in queue
     @Override
     public boolean setupPath(DeviceId src, DeviceId dst, String tunnelName, List<Constraint> constraints,
-                             LspType lspType, List<ExplicitPathInfo> explicitPathInfo) {
+                             LspType lspType) {
         checkNotNull(src);
         checkNotNull(dst);
         checkNotNull(tunnelName);
@@ -416,7 +245,7 @@
 
         if (srcDevice == null || dstDevice == null) {
             // Device is not known.
-            pceStore.addFailedPathInfo(new PcePathInfo(src, dst, tunnelName, constraints, lspType, explicitPathInfo));
+            pceStore.addFailedPathInfo(new PcePathInfo(src, dst, tunnelName, constraints, lspType));
             return false;
         }
 
@@ -426,7 +255,7 @@
 
         if (srcLsrId == null || dstLsrId == null) {
             // LSR id is not known.
-            pceStore.addFailedPathInfo(new PcePathInfo(src, dst, tunnelName, constraints, lspType, explicitPathInfo));
+            pceStore.addFailedPathInfo(new PcePathInfo(src, dst, tunnelName, constraints, lspType));
             return false;
         }
 
@@ -434,7 +263,7 @@
         DeviceCapability cfg = netCfgService.getConfig(DeviceId.deviceId(srcLsrId), DeviceCapability.class);
         if (cfg == null) {
             log.debug("No session to ingress.");
-            pceStore.addFailedPathInfo(new PcePathInfo(src, dst, tunnelName, constraints, lspType, explicitPathInfo));
+            pceStore.addFailedPathInfo(new PcePathInfo(src, dst, tunnelName, constraints, lspType));
             return false;
         }
 
@@ -470,30 +299,12 @@
             constraints = new LinkedList<>();
             constraints.add(CapabilityConstraint.of(CapabilityType.valueOf(lspType.name())));
         }
-        Set<Path> computedPathSet = Sets.newLinkedHashSet();
 
-        if (explicitPathInfo != null && !explicitPathInfo.isEmpty()) {
-            List<Path> finalComputedPath = computeExplicitPath(explicitPathInfo, src, dst, constraints);
-            if (finalComputedPath == null) {
-                return false;
-            }
-
-            pceStore.tunnelNameExplicitPathInfoMap(tunnelName, explicitPathInfo);
-            List<Link> links = new LinkedList<>();
-            double totalCost = 0;
-            // Add all partial computed paths
-            for (Path path : finalComputedPath) {
-                links.addAll(path.links());
-                totalCost = totalCost + path.cost();
-            }
-            computedPathSet.add(new DefaultPath(finalComputedPath.iterator().next().providerId(), links, totalCost));
-        } else {
-            computedPathSet = computePath(src, dst, constraints);
-        }
+        Set<Path> computedPathSet = computePath(src, dst, constraints);
 
         // NO-PATH
         if (computedPathSet.isEmpty()) {
-            pceStore.addFailedPathInfo(new PcePathInfo(src, dst, tunnelName, constraints, lspType, explicitPathInfo));
+            pceStore.addFailedPathInfo(new PcePathInfo(src, dst, tunnelName, constraints, lspType));
             return false;
         }
 
@@ -528,15 +339,14 @@
         if (bwConstraintValue != 0) {
             consumerId = reserveBandwidth(computedPath, bwConstraintValue, null);
             if (consumerId == null) {
-                pceStore.addFailedPathInfo(new PcePathInfo(src, dst, tunnelName, constraints,
-                        lspType, explicitPathInfo));
+                pceStore.addFailedPathInfo(new PcePathInfo(src, dst, tunnelName, constraints, lspType));
                 return false;
             }
         }
 
         TunnelId tunnelId = tunnelService.setupTunnel(appId, src, tunnel, computedPath);
         if (tunnelId == null) {
-            pceStore.addFailedPathInfo(new PcePathInfo(src, dst, tunnelName, constraints, lspType, explicitPathInfo));
+            pceStore.addFailedPathInfo(new PcePathInfo(src, dst, tunnelName, constraints, lspType));
             if (consumerId != null) {
                 resourceService.release(consumerId);
             }
@@ -553,7 +363,7 @@
     @Override
     public boolean updatePath(TunnelId tunnelId, List<Constraint> constraints) {
         checkNotNull(tunnelId);
-        Set<Path> computedPathSet = Sets.newLinkedHashSet();
+        Set<Path> computedPathSet = null;
         Tunnel tunnel = tunnelService.queryTunnel(tunnelId);
 
         if (tunnel == null) {
@@ -631,30 +441,8 @@
             constraints.add(costConstraint);
         }
 
-        List<ExplicitPathInfo> explicitPathInfo = pceStore
-                .getTunnelNameExplicitPathInfoMap(tunnel.tunnelName().value());
-        if (explicitPathInfo != null) {
-            List<Path> finalComputedPath = computeExplicitPath(explicitPathInfo,
-                    tunnel.path().src().deviceId(), tunnel.path().dst().deviceId(),
-                    constraints);
-
-            if (finalComputedPath == null) {
-                return false;
-            }
-
-            List<Link> totalLinks = new LinkedList<>();
-            double totalCost = 0;
-            //Add all partial computed paths
-            for (Path path : finalComputedPath) {
-                totalLinks.addAll(path.links());
-                totalCost = totalCost + path.cost();
-            }
-            computedPathSet.add(new DefaultPath(finalComputedPath.iterator().next().providerId(),
-                    totalLinks, totalCost));
-        } else {
-            computedPathSet = computePath(tunnel.path().src().deviceId(), tunnel.path().dst().deviceId(),
-                    constraints);
-        }
+        computedPathSet = computePath(links.get(0).src().deviceId(), links.get(links.size() - 1).dst().deviceId(),
+                                      constraints);
 
         // NO-PATH
         if (computedPathSet.isEmpty()) {
@@ -848,8 +636,7 @@
                 // then PCInitiate (Remove)
                 pceStore.addFailedPathInfo(new PcePathInfo(tunnel.path().src().deviceId(), tunnel
                         .path().dst().deviceId(), tunnel.tunnelName().value(), constraintList,
-                        LspType.valueOf(tunnel.annotations().value(LSP_SIG_TYPE)),
-                         pceStore.getTunnelNameExplicitPathInfoMap(tunnel.tunnelName().value())));
+                        LspType.valueOf(tunnel.annotations().value(LSP_SIG_TYPE))));
                 //Release that tunnel calling PCInitiate
                 releasePath(tunnel.tunnelId());
             }
@@ -1045,9 +832,7 @@
                     List<Link> links = tunnel.path().links();
                     pceStore.addFailedPathInfo(new PcePathInfo(links.get(0).src().deviceId(),
                                                                   links.get(links.size() - 1).dst().deviceId(),
-                                                                  tunnel.tunnelName().value(), constraints, lspType,
-                                                                  pceStore.getTunnelNameExplicitPathInfoMap(tunnel
-                                                                          .tunnelName().value())));
+                                                                  tunnel.tunnelName().value(), constraints, lspType));
                 }
 
                 break;
@@ -1076,11 +861,6 @@
         }
     }
 
-    @Override
-    public List<ExplicitPathInfo> explicitPathInfoList(String tunnelName) {
-        return pceStore.getTunnelNameExplicitPathInfoMap(tunnelName);
-    }
-
     //Computes path from tunnel store and also path failed to setup.
     private void callForOptimization() {
         //Recompute the LSPs which it was delegated [LSPs stored in PCE store (failed paths)]
@@ -1100,7 +880,7 @@
          */
         if (mastershipService.isLocalMaster(failedPathInfo.src())) {
             if (setupPath(failedPathInfo.src(), failedPathInfo.dst(), failedPathInfo.name(),
-                    failedPathInfo.constraints(), failedPathInfo.lspType(), failedPathInfo.explicitPathInfo())) {
+                    failedPathInfo.constraints(), failedPathInfo.lspType())) {
                 // If computation is success remove that path
                 pceStore.removeFailedPathInfo(failedPathInfo);
                 return true;
diff --git a/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/PcePath.java b/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/PcePath.java
index 19e9ce2..807b233 100644
--- a/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/PcePath.java
+++ b/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/PcePath.java
@@ -19,8 +19,7 @@
 import org.onosproject.incubator.net.tunnel.Tunnel;
 import org.onosproject.incubator.net.tunnel.TunnelId;
 import org.onosproject.net.intent.Constraint;
-
-import java.util.Collection;
+import org.onosproject.pce.pceservice.DefaultPcePath.Builder;
 
 /**
  * Abstraction of an entity which provides functionalities of pce path.
@@ -98,13 +97,6 @@
     Constraint bandwidthConstraint();
 
     /**
-     * Returns the list of explicit path objects.
-     *
-     * @return list of explicit path objects
-     */
-    Collection<ExplicitPathInfo> explicitPathInfo();
-
-    /**
      * Copies only non-null or non-zero member variables.
      *
      * @param id path-id
@@ -182,14 +174,6 @@
         Builder of(Tunnel tunnel);
 
         /**
-         * Returns the builder object of ExplicitPathInfo.
-         *
-         * @param explicitPathInfo list of explicit path obj
-         * @return builder object of ExplicitPathInfo
-         */
-        Builder explicitPathInfo(Collection<ExplicitPathInfo> explicitPathInfo);
-
-        /**
          * Builds object of pce path.
          *
          * @return object of pce path.
diff --git a/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/api/PceService.java b/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/api/PceService.java
index fdfdb73..f2d3622 100644
--- a/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/api/PceService.java
+++ b/apps/pce/app/src/main/java/org/onosproject/pce/pceservice/api/PceService.java
@@ -19,7 +19,6 @@
 
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.intent.Constraint;
-import org.onosproject.pce.pceservice.ExplicitPathInfo;
 import org.onosproject.pce.pceservice.LspType;
 import org.onosproject.incubator.net.tunnel.Tunnel;
 import org.onosproject.incubator.net.tunnel.TunnelId;
@@ -43,20 +42,6 @@
     boolean setupPath(DeviceId src, DeviceId dst, String tunnelName, List<Constraint> constraints, LspType lspType);
 
     /**
-     * Creates new path based on constraints and LSP type.
-     *
-     * @param src source device
-     * @param dst destination device
-     * @param tunnelName name of the tunnel
-     * @param constraints list of constraints to be applied on path
-     * @param lspType type of path to be setup
-     * @param explicitPathInfo list of explicit path info
-     * @return false on failure and true on successful path creation
-     */
-    boolean setupPath(DeviceId src, DeviceId dst, String tunnelName, List<Constraint> constraints, LspType lspType,
-                      List<ExplicitPathInfo> explicitPathInfo);
-
-    /**
      * Updates an existing path.
      *
      * @param tunnelId tunnel identifier
@@ -87,12 +72,4 @@
      * @return tunnel if path exists, otherwise null
      */
     Tunnel queryPath(TunnelId tunnelId);
-
-    /**
-     * Returns list of explicit path info.
-     *
-     * @param tunnelName tunnel name
-     * @return list of explicit path info
-     */
-    List<ExplicitPathInfo> explicitPathInfoList(String tunnelName);
 }
\ No newline at end of file
diff --git a/apps/pce/app/src/main/java/org/onosproject/pce/pcestore/DistributedPceStore.java b/apps/pce/app/src/main/java/org/onosproject/pce/pcestore/DistributedPceStore.java
index 78e46f6..9b2941f 100644
--- a/apps/pce/app/src/main/java/org/onosproject/pce/pcestore/DistributedPceStore.java
+++ b/apps/pce/app/src/main/java/org/onosproject/pce/pcestore/DistributedPceStore.java
@@ -19,7 +19,6 @@
 
 import com.google.common.collect.ImmutableSet;
 
-import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
 
@@ -34,7 +33,6 @@
 import org.onosproject.incubator.net.tunnel.TunnelId;
 import org.onosproject.net.intent.constraint.BandwidthConstraint;
 import org.onosproject.net.resource.ResourceConsumer;
-import org.onosproject.pce.pceservice.ExplicitPathInfo;
 import org.onosproject.pce.pceservice.constraint.CapabilityConstraint;
 import org.onosproject.pce.pceservice.constraint.CostConstraint;
 import org.onosproject.pce.pceservice.TunnelConsumerId;
@@ -71,9 +69,6 @@
     // List of Failed path info
     private DistributedSet<PcePathInfo> failedPathSet;
 
-    // Maintains tunnel name mapped to explicit path info
-    private ConsistentMap<String, List<ExplicitPathInfo>> tunnelNameExplicitPathInfoMap;
-
     private static final Serializer SERIALIZER = Serializer
             .using(new KryoNamespace.Builder().register(KryoNamespaces.API)
                     .register(PcePathInfo.class)
@@ -104,16 +99,6 @@
                 .build()
                 .asDistributedSet();
 
-        tunnelNameExplicitPathInfoMap = storageService.<String, List<ExplicitPathInfo>>consistentMapBuilder()
-                .withName("onos-pce-explicitpathinfo")
-                .withSerializer(Serializer.using(
-                        new KryoNamespace.Builder()
-                                .register(KryoNamespaces.API)
-                                .register(ExplicitPathInfo.class)
-                                .register(ExplicitPathInfo.Type.class)
-                                .build()))
-                .build();
-
         log.info("Started");
     }
 
@@ -196,18 +181,4 @@
         }
         return true;
     }
-
-    @Override
-    public boolean tunnelNameExplicitPathInfoMap(String tunnelName, List<ExplicitPathInfo> explicitPathInfo) {
-        checkNotNull(tunnelName);
-        checkNotNull(explicitPathInfo);
-        return tunnelNameExplicitPathInfoMap.put(tunnelName, explicitPathInfo) != null ? true : false;
-    }
-
-    @Override
-    public List<ExplicitPathInfo> getTunnelNameExplicitPathInfoMap(String tunnelName) {
-        checkNotNull(tunnelName);
-        return tunnelNameExplicitPathInfoMap.get(tunnelName).value();
-    }
-
 }
diff --git a/apps/pce/app/src/main/java/org/onosproject/pce/pcestore/PcePathInfo.java b/apps/pce/app/src/main/java/org/onosproject/pce/pcestore/PcePathInfo.java
index 6497e36..3b7b47e 100644
--- a/apps/pce/app/src/main/java/org/onosproject/pce/pcestore/PcePathInfo.java
+++ b/apps/pce/app/src/main/java/org/onosproject/pce/pcestore/PcePathInfo.java
@@ -22,7 +22,6 @@
 
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.intent.Constraint;
-import org.onosproject.pce.pceservice.ExplicitPathInfo;
 import org.onosproject.pce.pceservice.LspType;
 
 /**
@@ -41,8 +40,6 @@
 
     private LspType lspType; // lsp type
 
-    private List<ExplicitPathInfo> explicitPathInfo; //Explicit path info to compute explicit path
-
     /**
      * Initialization of member variables.
      *
@@ -51,20 +48,17 @@
      * @param name tunnel name
      * @param constraints list of constraints
      * @param lspType lsp type
-     * @param explicitPathInfo explicit path info
      */
     public PcePathInfo(DeviceId src,
                     DeviceId dst,
                     String name,
                     List<Constraint> constraints,
-                    LspType lspType,
-                    List<ExplicitPathInfo> explicitPathInfo) {
+                    LspType lspType) {
        this.src = src;
        this.dst = dst;
        this.name = name;
        this.constraints = constraints;
        this.lspType = lspType;
-       this.explicitPathInfo = explicitPathInfo;
     }
 
     /**
@@ -76,7 +70,6 @@
        this.name = null;
        this.constraints = null;
        this.lspType = null;
-       this.explicitPathInfo = null;
     }
 
     /**
@@ -169,27 +162,9 @@
         this.lspType = lspType;
     }
 
-    /**
-     * Returns list of explicit path info.
-     *
-     * @return list of explicit path info
-     */
-    public List<ExplicitPathInfo> explicitPathInfo() {
-        return explicitPathInfo;
-    }
-
-    /**
-     * Sets list of explicit path info.
-     *
-     * @param explicitPathInfo list of explicit path info
-     */
-    public void explicitPathInfo(List<ExplicitPathInfo> explicitPathInfo) {
-        this.explicitPathInfo = explicitPathInfo;
-    }
-
     @Override
     public int hashCode() {
-        return Objects.hash(src, dst, name, constraints, lspType, explicitPathInfo);
+        return Objects.hash(src, dst, name, constraints, lspType);
     }
 
     @Override
@@ -203,8 +178,7 @@
                     Objects.equals(this.dst, other.dst) &&
                     Objects.equals(this.name, other.name) &&
                     Objects.equals(this.constraints, other.constraints) &&
-                    Objects.equals(this.lspType, other.lspType) &&
-                    Objects.equals(this.explicitPathInfo, other.explicitPathInfo);
+                    Objects.equals(this.lspType, other.lspType);
         }
         return false;
     }
@@ -213,12 +187,11 @@
     public String toString() {
         return MoreObjects.toStringHelper(getClass())
                 .omitNullValues()
-                .add("Source", src)
-                .add("Destination", dst)
-                .add("Name", name)
-                .add("Constraints", constraints)
-                .add("explicitPathInfo", explicitPathInfo)
-                .add("LspType", lspType)
+                .add("Source", src.toString())
+                .add("Destination", dst.toString())
+                .add("Name", name.toString())
+                .add("Constraints", constraints.toString())
+                .add("LspType", lspType.toString())
                 .toString();
     }
 }
diff --git a/apps/pce/app/src/main/java/org/onosproject/pce/pcestore/api/PceStore.java b/apps/pce/app/src/main/java/org/onosproject/pce/pcestore/api/PceStore.java
index 0a7fa94..3fdef15 100644
--- a/apps/pce/app/src/main/java/org/onosproject/pce/pcestore/api/PceStore.java
+++ b/apps/pce/app/src/main/java/org/onosproject/pce/pcestore/api/PceStore.java
@@ -15,11 +15,8 @@
  */
 package org.onosproject.pce.pcestore.api;
 
-import java.util.List;
-
 import org.onosproject.incubator.net.tunnel.TunnelId;
 import org.onosproject.net.resource.ResourceConsumer;
-import org.onosproject.pce.pceservice.ExplicitPathInfo;
 import org.onosproject.pce.pcestore.PcePathInfo;
 
 import java.util.Map;
@@ -110,21 +107,4 @@
      * @return success or failure
      */
     boolean removeFailedPathInfo(PcePathInfo failedPathInfo);
-
-    /**
-     * Adds explicit path info to the map with corresponding tunnel name.
-     *
-     * @param tunnelName tunnel name as key
-     * @param explicitPathInfo list of explicit path objects
-     * @return whether it is added to map
-     */
-    boolean tunnelNameExplicitPathInfoMap(String tunnelName, List<ExplicitPathInfo> explicitPathInfo);
-
-    /**
-     * Gets explicit path info based on tunnel name.
-     *
-     * @param tunnelName tunnel name as key
-     * @return list of explicit path info
-     */
-    List<ExplicitPathInfo> getTunnelNameExplicitPathInfoMap(String tunnelName);
 }