Encapsulate AggregationBuilder name and make getter public

src/main/java/org/elasticsearch/search/aggregations/AbstractAggregationBuilder.java

@@ -25,12 +25,15 @@
  */
 public abstract class AbstractAggregationBuilder implements ToXContent {
 
-    protected final String name;
+    private final String name;
     protected final String type;
 
     protected AbstractAggregationBuilder(String name, String type) {
         this.name = name;
         this.type = type;
     }
 
+    public String getName() {
+        return name;
+    }
 }

src/main/java/org/elasticsearch/search/aggregations/AggregationBuilder.java

@@ -100,7 +100,7 @@ public B subAggregation(Map<String, Object> aggs) {
 
     @Override
     public final XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
-        builder.startObject(name);
+        builder.startObject(getName());
 
         builder.field(type);
         internalXContent(builder, params);

src/main/java/org/elasticsearch/search/aggregations/bucket/children/ChildrenBuilder.java

@@ -43,7 +43,7 @@ public ChildrenBuilder childType(String childType) {
     protected XContentBuilder internalXContent(XContentBuilder builder, Params params) throws IOException {
         builder.startObject();
         if (childType == null) {
-            throw new SearchSourceBuilderException("child_type must be set on children aggregation [" + name + "]");
+            throw new SearchSourceBuilderException("child_type must be set on children aggregation [" + getName() + "]");
         }
         builder.field("type", childType);
         return builder.endObject();

src/main/java/org/elasticsearch/search/aggregations/bucket/filter/FilterAggregationBuilder.java

@@ -45,7 +45,7 @@ public FilterAggregationBuilder filter(FilterBuilder filter) {
     @Override
     protected XContentBuilder internalXContent(XContentBuilder builder, Params params) throws IOException {
         if (filter == null) {
-            throw new SearchSourceBuilderException("filter must be set on filter aggregation [" + name + "]");
+            throw new SearchSourceBuilderException("filter must be set on filter aggregation [" + getName() + "]");
         }
         filter.toXContent(builder, params);
         return builder;

src/main/java/org/elasticsearch/search/aggregations/bucket/filters/FiltersAggregationBuilder.java

@@ -63,7 +63,7 @@ public FiltersAggregationBuilder filter(FilterBuilder filter) {
     protected XContentBuilder internalXContent(XContentBuilder builder, Params params) throws IOException {
         builder.startObject();
         if (keyedFilters == null && nonKeyedFilters == null) {
-            throw new SearchSourceBuilderException("At least one filter must be set on filter aggregation [" + name + "]");
+            throw new SearchSourceBuilderException("At least one filter must be set on filter aggregation [" + getName() + "]");
         }
         if (keyedFilters != null && nonKeyedFilters != null) {
             throw new SearchSourceBuilderException("Cannot add both keyed and non-keyed filters to filters aggregation");

src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/DateHistogramBuilder.java

@@ -125,7 +125,7 @@ public DateHistogramBuilder extendedBounds(DateTime min, DateTime max) {
     @Override
     protected XContentBuilder doInternalXContent(XContentBuilder builder, Params params) throws IOException {
         if (interval == null) {
-            throw new SearchSourceBuilderException("[interval] must be defined for histogram aggregation [" + name + "]");
+            throw new SearchSourceBuilderException("[interval] must be defined for histogram aggregation [" + getName() + "]");
         }
         if (interval instanceof Number) {
             interval = TimeValue.timeValueMillis(((Number) interval).longValue()).toString();

src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/HistogramBuilder.java

@@ -99,7 +99,7 @@ public HistogramBuilder postOffset(long postOffset) {
     @Override
     protected XContentBuilder doInternalXContent(XContentBuilder builder, Params params) throws IOException {
         if (interval == null) {
-            throw new SearchSourceBuilderException("[interval] must be defined for histogram aggregation [" + name + "]");
+            throw new SearchSourceBuilderException("[interval] must be defined for histogram aggregation [" + getName() + "]");
         }
         builder.field("interval", interval);
 

src/main/java/org/elasticsearch/search/aggregations/bucket/nested/NestedBuilder.java

@@ -45,7 +45,7 @@ public NestedBuilder path(String path) {
     protected XContentBuilder internalXContent(XContentBuilder builder, Params params) throws IOException {
         builder.startObject();
         if (path == null) {
-            throw new SearchSourceBuilderException("nested path must be set on nested aggregation [" + name + "]");
+            throw new SearchSourceBuilderException("nested path must be set on nested aggregation [" + getName() + "]");
         }
         builder.field("path", path);
         return builder.endObject();

src/main/java/org/elasticsearch/search/aggregations/bucket/range/AbstractRangeBuilder.java

@@ -70,7 +70,7 @@ protected AbstractRangeBuilder(String name, String type) {
     @Override
     protected XContentBuilder doInternalXContent(XContentBuilder builder, Params params) throws IOException {
         if (ranges.isEmpty()) {
-            throw new SearchSourceBuilderException("at least one range must be defined for range aggregation [" + name + "]");
+            throw new SearchSourceBuilderException("at least one range must be defined for range aggregation [" + getName() + "]");
         }
         builder.startArray("ranges");
         for (Range range : ranges) {

src/main/java/org/elasticsearch/search/aggregations/bucket/range/geodistance/GeoDistanceBuilder.java

@@ -156,10 +156,10 @@ public GeoDistanceBuilder addUnboundedFrom(double from) {
     protected XContentBuilder internalXContent(XContentBuilder builder, Params params) throws IOException {
         builder.startObject();
         if (ranges.isEmpty()) {
-            throw new SearchSourceBuilderException("at least one range must be defined for geo_distance aggregation [" + name + "]");
+            throw new SearchSourceBuilderException("at least one range must be defined for geo_distance aggregation [" + getName() + "]");
         }
         if (point == null) {
-            throw new SearchSourceBuilderException("center point must be defined for geo_distance aggregation [" + name + "]");
+            throw new SearchSourceBuilderException("center point must be defined for geo_distance aggregation [" + getName() + "]");
         }
 
         if (field != null) {

src/main/java/org/elasticsearch/search/aggregations/bucket/range/ipv4/IPv4RangeBuilder.java

@@ -47,7 +47,7 @@ public IPv4RangeBuilder addMaskRange(String mask) {
     public IPv4RangeBuilder addMaskRange(String key, String mask) {
         long[] fromTo = cidrMaskToMinMax(mask);
         if (fromTo == null) {
-            throw new SearchSourceBuilderException("invalid CIDR mask [" + mask + "] in ip_range aggregation [" + name + "]");
+            throw new SearchSourceBuilderException("invalid CIDR mask [" + mask + "] in ip_range aggregation [" + getName() + "]");
         }
         ranges.add(new Range(key, fromTo[0] < 0 ? null : fromTo[0], fromTo[1] < 0 ? null : fromTo[1]));
         return this;

src/main/java/org/elasticsearch/search/aggregations/metrics/MetricsAggregationBuilder.java

@@ -35,7 +35,7 @@ public MetricsAggregationBuilder(String name, String type) {
 
     @Override
     public final XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
-        builder.startObject(name).startObject(type);
+        builder.startObject(getName()).startObject(type);
         internalXContent(builder, params);
         return builder.endObject().endObject();
     }

src/main/java/org/elasticsearch/search/aggregations/metrics/percentiles/PercentilesBuilder.java

@@ -39,7 +39,7 @@ public PercentilesBuilder percentiles(double... percentiles) {
         for (int i = 0; i < percentiles.length; i++) {
             if (percentiles[i] < 0 || percentiles[i] > 100) {
                 throw new IllegalArgumentException("the percents in the percentiles aggregation [" +
-                        name + "] must be in the [0, 100] range");
+                        getName() + "] must be in the [0, 100] range");
             }
         }
         this.percentiles = percentiles;

src/main/java/org/elasticsearch/search/aggregations/metrics/tophits/TopHitsBuilder.java

@@ -376,7 +376,7 @@ public TopHitsBuilder setHighlighterOptions(Map<String, Object> options) {
 
     @Override
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
-        builder.startObject(name).field(type);
+        builder.startObject(getName()).field(type);
         sourceBuilder().toXContent(builder, params);
         return builder.endObject();
     }

src/test/java/org/elasticsearch/search/aggregations/bucket/DateHistogramTests.java

@@ -182,7 +182,7 @@ public void singleValuedField_WithPostTimeZone() throws Exception {
                 .addAggregation(new AbstractAggregationBuilder("histo", "date_histogram") {
                     @Override
                     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
-                        return builder.startObject(name)
+                        return builder.startObject(getName())
                                 .startObject(type)
                                     .field("field", "date")
                                     .field("interval", "1d")