Changed es version from string to class Version

Author: martijnvg

src/main/java/org/elasticsearch/action/admin/cluster/node/info/NodeInfo.java

@@ -20,6 +20,7 @@
 package org.elasticsearch.action.admin.cluster.node.info;
 
 import com.google.common.collect.ImmutableMap;
+import org.elasticsearch.Version;
 import org.elasticsearch.action.support.nodes.NodeOperationResponse;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.common.Nullable;
@@ -49,7 +50,7 @@ public class NodeInfo extends NodeOperationResponse {
  @Nullable
  private String hostname;
 
- private String version;
+ private Version version;
 
  @Nullable
  private Settings settings;
@@ -78,7 +79,7 @@ public class NodeInfo extends NodeOperationResponse {
  NodeInfo() {
  }
 
- public NodeInfo(@Nullable String hostname, String version, DiscoveryNode node, @Nullable ImmutableMap<String, String> serviceAttributes, @Nullable Settings settings,
+ public NodeInfo(@Nullable String hostname, Version version, DiscoveryNode node, @Nullable ImmutableMap<String, String> serviceAttributes, @Nullable Settings settings,
  @Nullable OsInfo os, @Nullable ProcessInfo process, @Nullable JvmInfo jvm, @Nullable ThreadPoolInfo threadPool, @Nullable NetworkInfo network,
  @Nullable TransportInfo transport, @Nullable HttpInfo http) {
  super(node);
@@ -114,14 +115,14 @@ public String getHostname() {
  /**
  * The current ES version
  */
- public String version() {
+ public Version version() {
  return version;
  }
 
  /**
  * The current ES version
  */
- public String getVersion() {
+ public Version getVersion() {
  return version();
  }
 
@@ -263,7 +264,7 @@ public void readFrom(StreamInput in) throws IOException {
  if (in.readBoolean()) {
  hostname = in.readUTF();
  }
- version = in.readOptionalString();
+ version = Version.readVersion(in);
  if (in.readBoolean()) {
  ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
  int size = in.readVInt();
@@ -307,7 +308,7 @@ public void writeTo(StreamOutput out) throws IOException {
  out.writeBoolean(true);
  out.writeUTF(hostname);
  }
- out.writeOptionalString(version);
+ out.writeVInt(version.id);
  if (serviceAttributes() == null) {
  out.writeBoolean(false);
  } else {