Rest: Remove 'case' parameter from rest apis

The current api allows for choosing which "case" response json keys are
written in. This has the options of camelCase or underscore. camelCase
is going to be deprecated from the query apis. However, with the case
api, it is not necessary to deprecate, as users who were using it in 2.x
can transition completely on 2.x before upgrading by simply using
the underscore option.

This change removes the 'case' option from rest apis.

see elastic#8988

core/src/main/java/org/elasticsearch/action/admin/cluster/health/ClusterHealthResponse.java

@@ -305,7 +305,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
         if (outputIndices) {
             builder.startObject(Fields.INDICES);
             for (ClusterIndexHealth indexHealth : clusterStateHealth.getIndices().values()) {
-                builder.startObject(indexHealth.getIndex(), XContentBuilder.FieldCaseConversion.NONE);
+                builder.startObject(indexHealth.getIndex());
                 indexHealth.toXContent(builder, params);
                 builder.endObject();
             }

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

@@ -64,23 +64,23 @@ public void writeTo(StreamOutput out) throws IOException {
 
     @Override
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
-        builder.field("cluster_name", getClusterName().value(), XContentBuilder.FieldCaseConversion.NONE);
+        builder.field("cluster_name", getClusterName().value());
 
         builder.startObject("nodes");
         for (NodeInfo nodeInfo : this) {
-            builder.startObject(nodeInfo.getNode().getId(), XContentBuilder.FieldCaseConversion.NONE);
+            builder.startObject(nodeInfo.getNode().getId());
 
-            builder.field("name", nodeInfo.getNode().getName(), XContentBuilder.FieldCaseConversion.NONE);
+            builder.field("name", nodeInfo.getNode().getName());
             builder.field("transport_address", nodeInfo.getNode().getAddress().toString());
-            builder.field("host", nodeInfo.getNode().getHostName(), XContentBuilder.FieldCaseConversion.NONE);
-            builder.field("ip", nodeInfo.getNode().getHostAddress(), XContentBuilder.FieldCaseConversion.NONE);
+            builder.field("host", nodeInfo.getNode().getHostName());
+            builder.field("ip", nodeInfo.getNode().getHostAddress());
 
             builder.field("version", nodeInfo.getVersion());
             builder.field("build_hash", nodeInfo.getBuild().shortHash());
 
             if (nodeInfo.getServiceAttributes() != null) {
                 for (Map.Entry<String, String> nodeAttribute : nodeInfo.getServiceAttributes().entrySet()) {
-                    builder.field(nodeAttribute.getKey(), nodeAttribute.getValue(), XContentBuilder.FieldCaseConversion.NONE);
+                    builder.field(nodeAttribute.getKey(), nodeAttribute.getValue());
                 }
             }
 
@@ -93,7 +93,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
             if (!nodeInfo.getNode().getAttributes().isEmpty()) {
                 builder.startObject("attributes");
                 for (Map.Entry<String, String> entry : nodeInfo.getNode().getAttributes().entrySet()) {
-                    builder.field(entry.getKey(), entry.getValue(), XContentBuilder.FieldCaseConversion.NONE);
+                    builder.field(entry.getKey(), entry.getValue());
                 }
                 builder.endObject();
             }

core/src/main/java/org/elasticsearch/action/admin/cluster/node/stats/NodeStats.java

@@ -299,10 +299,10 @@ public void writeTo(StreamOutput out) throws IOException {
     @Override
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
         if (!params.param("node_info_format", "default").equals("none")) {
-            builder.field("name", getNode().getName(), XContentBuilder.FieldCaseConversion.NONE);
-            builder.field("transport_address", getNode().getAddress().toString(), XContentBuilder.FieldCaseConversion.NONE);
-            builder.field("host", getNode().getHostName(), XContentBuilder.FieldCaseConversion.NONE);
-            builder.field("ip", getNode().getAddress(), XContentBuilder.FieldCaseConversion.NONE);
+            builder.field("name", getNode().getName());
+            builder.field("transport_address", getNode().getAddress().toString());
+            builder.field("host", getNode().getHostName());
+            builder.field("ip", getNode().getAddress());
 
             builder.startArray("roles");
             for (DiscoveryNode.Role role : getNode().getRoles()) {
@@ -313,7 +313,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
             if (!getNode().getAttributes().isEmpty()) {
                 builder.startObject("attributes");
                 for (Map.Entry<String, String> attrEntry : getNode().getAttributes().entrySet()) {
-                    builder.field(attrEntry.getKey(), attrEntry.getValue(), XContentBuilder.FieldCaseConversion.NONE);
+                    builder.field(attrEntry.getKey(), attrEntry.getValue());
                 }
                 builder.endObject();
             }

core/src/main/java/org/elasticsearch/action/admin/cluster/node/stats/NodesStatsResponse.java

@@ -65,7 +65,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
 
         builder.startObject("nodes");
         for (NodeStats nodeStats : this) {
-            builder.startObject(nodeStats.getNode().getId(), XContentBuilder.FieldCaseConversion.NONE);
+            builder.startObject(nodeStats.getNode().getId());
             builder.field("timestamp", nodeStats.getTimestamp());
             nodeStats.toXContent(builder, params);
 
@@ -88,4 +88,4 @@ public String toString() {
             return "{ \"error\" : \"" + e.getMessage() + "\"}";
         }
     }
-}
+}

core/src/main/java/org/elasticsearch/action/admin/cluster/node/tasks/list/ListTasksResponse.java

@@ -163,7 +163,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
             builder.startObject("nodes");
             for (Map.Entry<DiscoveryNode, List<TaskInfo>> entry : getPerNodeTasks().entrySet()) {
                 DiscoveryNode node = entry.getKey();
-                builder.startObject(node.getId(), XContentBuilder.FieldCaseConversion.NONE);
+                builder.startObject(node.getId());
                 builder.field("name", node.getName());
                 builder.field("transport_address", node.getAddress().toString());
                 builder.field("host", node.getHostName());
@@ -178,13 +178,13 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
                 if (!node.getAttributes().isEmpty()) {
                     builder.startObject("attributes");
                     for (Map.Entry<String, String> attrEntry : node.getAttributes().entrySet()) {
-                        builder.field(attrEntry.getKey(), attrEntry.getValue(), XContentBuilder.FieldCaseConversion.NONE);
+                        builder.field(attrEntry.getKey(), attrEntry.getValue());
                     }
                     builder.endObject();
                 }
                 builder.startObject("tasks");
                 for(TaskInfo task : entry.getValue()) {
-                    builder.startObject(task.getTaskId().toString(), XContentBuilder.FieldCaseConversion.NONE);
+                    builder.startObject(task.getTaskId().toString());
                     task.toXContent(builder, params);
                     builder.endObject();
                 }
@@ -194,7 +194,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
         } else if ("parents".equals(groupBy)) {
             builder.startObject("tasks");
             for (TaskGroup group : getTaskGroups()) {
-                builder.startObject(group.getTaskInfo().getTaskId().toString(), XContentBuilder.FieldCaseConversion.NONE);
+                builder.startObject(group.getTaskInfo().getTaskId().toString());
                 group.toXContent(builder, params);
                 builder.endObject();
             }

core/src/main/java/org/elasticsearch/action/admin/cluster/repositories/verify/VerifyRepositoryResponse.java

@@ -86,8 +86,8 @@ static final class Fields {
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
         builder.startObject(Fields.NODES);
         for (DiscoveryNode node : nodes) {
-            builder.startObject(node.getId(), XContentBuilder.FieldCaseConversion.NONE);
-            builder.field(Fields.NAME, node.getName(), XContentBuilder.FieldCaseConversion.NONE);
+            builder.startObject(node.getId());
+            builder.field(Fields.NAME, node.getName());
             builder.endObject();
         }
         builder.endObject();

core/src/main/java/org/elasticsearch/action/admin/cluster/snapshots/status/SnapshotIndexStatus.java

@@ -96,7 +96,7 @@ static final class Fields {
 
     @Override
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
-        builder.startObject(getIndex(), XContentBuilder.FieldCaseConversion.NONE);
+        builder.startObject(getIndex());
         shardsStats.toXContent(builder, params);
         stats.toXContent(builder, params);
         builder.startObject(Fields.SHARDS);

core/src/main/java/org/elasticsearch/action/admin/indices/mapping/get/GetFieldMappingsResponse.java

@@ -74,10 +74,10 @@ public FieldMappingMetaData fieldMappings(String index, String type, String fiel
     @Override
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
         for (Map.Entry<String, Map<String, Map<String, FieldMappingMetaData>>> indexEntry : mappings.entrySet()) {
-            builder.startObject(indexEntry.getKey(), XContentBuilder.FieldCaseConversion.NONE);
+            builder.startObject(indexEntry.getKey());
             builder.startObject("mappings");
             for (Map.Entry<String, Map<String, FieldMappingMetaData>> typeEntry : indexEntry.getValue().entrySet()) {
-                builder.startObject(typeEntry.getKey(), XContentBuilder.FieldCaseConversion.NONE);
+                builder.startObject(typeEntry.getKey());
                 for (Map.Entry<String, FieldMappingMetaData> fieldEntry : typeEntry.getValue().entrySet()) {
                     builder.startObject(fieldEntry.getKey());
                     fieldEntry.getValue().toXContent(builder, params);

core/src/main/java/org/elasticsearch/action/admin/indices/segments/IndicesSegmentResponse.java

@@ -102,7 +102,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
         builder.startObject(Fields.INDICES);
 
         for (IndexSegments indexSegments : getIndices().values()) {
-            builder.startObject(indexSegments.getIndex(), XContentBuilder.FieldCaseConversion.NONE);
+            builder.startObject(indexSegments.getIndex());
 
             builder.startObject(Fields.SHARDS);
             for (IndexShardSegments indexSegment : indexSegments) {
@@ -164,7 +164,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
         builder.endObject();
         return builder;
     }
-    
+
     static void toXContent(XContentBuilder builder, Accountable tree) throws IOException {
         builder.startObject();
         builder.field(Fields.DESCRIPTION, tree.toString());
@@ -208,4 +208,4 @@ static final class Fields {
         static final XContentBuilderString DESCRIPTION = new XContentBuilderString("description");
         static final XContentBuilderString CHILDREN = new XContentBuilderString("children");
     }
-}
+}

core/src/main/java/org/elasticsearch/action/admin/indices/stats/IndicesStatsResponse.java

@@ -176,7 +176,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
         if ("indices".equalsIgnoreCase(level) || "shards".equalsIgnoreCase(level)) {
             builder.startObject(Fields.INDICES);
             for (IndexStats indexStats : getIndices().values()) {
-                builder.startObject(indexStats.getIndex(), XContentBuilder.FieldCaseConversion.NONE);
+                builder.startObject(indexStats.getIndex());
 
                 builder.startObject("primaries");
                 indexStats.getPrimaries().toXContent(builder, params);

core/src/main/java/org/elasticsearch/action/admin/indices/upgrade/get/UpgradeStatusResponse.java

@@ -126,7 +126,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
         if (outputIndices) {
             builder.startObject(Fields.INDICES);
             for (IndexUpgradeStatus indexUpgradeStatus : getIndices().values()) {
-                builder.startObject(indexUpgradeStatus.getIndex(), XContentBuilder.FieldCaseConversion.NONE);
+                builder.startObject(indexUpgradeStatus.getIndex());
 
                 builder.byteSizeField(Fields.SIZE_IN_BYTES, Fields.SIZE, indexUpgradeStatus.getTotalBytes());
                 builder.byteSizeField(Fields.SIZE_TO_UPGRADE_IN_BYTES, Fields.SIZE_TO_UPGRADE, indexUpgradeStatus.getToUpgradeBytes());

core/src/main/java/org/elasticsearch/cluster/ClusterState.java

@@ -427,7 +427,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
             builder.startObject("templates");
             for (ObjectCursor<IndexTemplateMetaData> cursor : metaData().templates().values()) {
                 IndexTemplateMetaData templateMetaData = cursor.value;
-                builder.startObject(templateMetaData.name(), XContentBuilder.FieldCaseConversion.NONE);
+                builder.startObject(templateMetaData.name());
 
                 builder.field("template", templateMetaData.template());
                 builder.field("order", templateMetaData.order());
@@ -458,7 +458,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
 
             builder.startObject("indices");
             for (IndexMetaData indexMetaData : metaData()) {
-                builder.startObject(indexMetaData.getIndex().getName(), XContentBuilder.FieldCaseConversion.NONE);
+                builder.startObject(indexMetaData.getIndex().getName());
 
                 builder.field("state", indexMetaData.getState().toString().toLowerCase(Locale.ENGLISH));
 
@@ -522,7 +522,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
             builder.startObject("routing_table");
             builder.startObject("indices");
             for (IndexRoutingTable indexRoutingTable : routingTable()) {
-                builder.startObject(indexRoutingTable.getIndex().getName(), XContentBuilder.FieldCaseConversion.NONE);
+                builder.startObject(indexRoutingTable.getIndex().getName());
                 builder.startObject("shards");
                 for (IndexShardRoutingTable indexShardRoutingTable : indexRoutingTable) {
                     builder.startArray(Integer.toString(indexShardRoutingTable.shardId().id()));
@@ -549,7 +549,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
 
             builder.startObject("nodes");
             for (RoutingNode routingNode : getRoutingNodes()) {
-                builder.startArray(routingNode.nodeId() == null ? "null" : routingNode.nodeId(), XContentBuilder.FieldCaseConversion.NONE);
+                builder.startArray(routingNode.nodeId() == null ? "null" : routingNode.nodeId());
                 for (ShardRouting shardRouting : routingNode) {
                     shardRouting.toXContent(builder, params);
                 }

core/src/main/java/org/elasticsearch/cluster/metadata/AliasMetaData.java

@@ -281,7 +281,7 @@ public AliasMetaData build() {
         }
 
         public static void toXContent(AliasMetaData aliasMetaData, XContentBuilder builder, ToXContent.Params params) throws IOException {
-            builder.startObject(aliasMetaData.alias(), XContentBuilder.FieldCaseConversion.NONE);
+            builder.startObject(aliasMetaData.alias());
 
             boolean binary = params.paramAsBoolean("binary", false);
 

core/src/main/java/org/elasticsearch/cluster/metadata/IndexMetaData.java

@@ -908,7 +908,7 @@ public IndexMetaData build() {
         }
 
         public static void toXContent(IndexMetaData indexMetaData, XContentBuilder builder, ToXContent.Params params) throws IOException {
-            builder.startObject(indexMetaData.getIndex().getName(), XContentBuilder.FieldCaseConversion.NONE);
+            builder.startObject(indexMetaData.getIndex().getName());
 
             builder.field(KEY_VERSION, indexMetaData.getVersion());
             builder.field(KEY_STATE, indexMetaData.getState().toString().toLowerCase(Locale.ENGLISH));
@@ -936,7 +936,7 @@ public static void toXContent(IndexMetaData indexMetaData, XContentBuilder build
             builder.endArray();
 
             for (ObjectObjectCursor<String, Custom> cursor : indexMetaData.getCustoms()) {
-                builder.startObject(cursor.key, XContentBuilder.FieldCaseConversion.NONE);
+                builder.startObject(cursor.key);
                 cursor.value.toXContent(builder, params);
                 builder.endObject();
             }

core/src/main/java/org/elasticsearch/cluster/metadata/IndexTemplateMetaData.java

@@ -316,7 +316,7 @@ public IndexTemplateMetaData build() {
 
         @SuppressWarnings("unchecked")
         public static void toXContent(IndexTemplateMetaData indexTemplateMetaData, XContentBuilder builder, ToXContent.Params params) throws IOException {
-            builder.startObject(indexTemplateMetaData.name(), XContentBuilder.FieldCaseConversion.NONE);
+            builder.startObject(indexTemplateMetaData.name());
 
             builder.field("order", indexTemplateMetaData.order());
             builder.field("template", indexTemplateMetaData.template());
@@ -352,7 +352,7 @@ public static void toXContent(IndexTemplateMetaData indexTemplateMetaData, XCont
             }
 
             for (ObjectObjectCursor<String, IndexMetaData.Custom> cursor : indexTemplateMetaData.customs()) {
-                builder.startObject(cursor.key, XContentBuilder.FieldCaseConversion.NONE);
+                builder.startObject(cursor.key);
                 cursor.value.toXContent(builder, params);
                 builder.endObject();
             }

core/src/main/java/org/elasticsearch/cluster/metadata/RepositoriesMetaData.java

@@ -197,7 +197,7 @@ public EnumSet<MetaData.XContentContext> context() {
      * @param params     serialization parameters
      */
     public static void toXContent(RepositoryMetaData repository, XContentBuilder builder, ToXContent.Params params) throws IOException {
-        builder.startObject(repository.name(), XContentBuilder.FieldCaseConversion.NONE);
+        builder.startObject(repository.name());
         builder.field("type", repository.type());
         builder.startObject("settings");
         repository.settings().toXContent(builder, params);

core/src/main/java/org/elasticsearch/cluster/node/DiscoveryNode.java

@@ -335,7 +335,7 @@ public String toString() {
 
     @Override
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
-        builder.startObject(getId(), XContentBuilder.FieldCaseConversion.NONE);
+        builder.startObject(getId());
         builder.field("name", getName());
         builder.field("transport_address", getAddress().toString());
 

core/src/main/java/org/elasticsearch/common/settings/Settings.java

@@ -751,7 +751,7 @@ public XContentBuilder toXContent(XContentBuilder builder, Params params) throws
             }
         } else {
             for (Map.Entry<String, String> entry : settings.getAsMap().entrySet()) {
-                builder.field(entry.getKey(), entry.getValue(), XContentBuilder.FieldCaseConversion.NONE);
+                builder.field(entry.getKey(), entry.getValue());
             }
         }
         return builder;

core/src/main/java/org/elasticsearch/common/unit/Fuzziness.java

@@ -43,7 +43,7 @@ public final class Fuzziness implements ToXContent, Writeable<Fuzziness> {
     public static final Fuzziness ONE = new Fuzziness(1);
     public static final Fuzziness TWO = new Fuzziness(2);
     public static final Fuzziness AUTO = new Fuzziness("AUTO");
-    public static final ParseField FIELD = new ParseField(X_FIELD_NAME.camelCase().getValue());
+    public static final ParseField FIELD = new ParseField(X_FIELD_NAME.value());
 
     private final String fuzziness;