[doc] fix outdated java api examples

* QueryBuilders.queryString is now QueryBuilders.queryStringQuery
* DateHistogram.Interval is now DateHistogramInterval
* Refactoring of buckets in aggs
* FilterBuilders has been replaced by QueryBuilders

Closes #9976.

docs/java-api/aggregations/bucket/datehistogram-aggregation.asciidoc

@@ -47,11 +47,11 @@ Histogram agg = sr.getAggregations().get("agg");
 
 // For each entry
 for (Histogram.Bucket entry : agg.getBuckets()) {
-    DateTime keyAsDate = (DateTime) entry.getKey();  // Key
+    DateTime key = (DateTime) entry.getKey();    // Key
-    String key = entry.getKeyAsString();            // Key as String
+    String keyAsString = entry.getKeyAsString(); // Key as String
-    long docCount = entry.getDocCount();             // Doc count
+    long docCount = entry.getDocCount();         // Doc count
 
-    logger.info("key [{}], date [{}], doc_count [{}]", key, keyAsDate.getYear(), docCount);
+    logger.info("key [{}], date [{}], doc_count [{}]", keyAsString, key.getYear(), docCount);
 }
 --------------------------------------------------
 

docs/java-api/aggregations/bucket/daterange-aggregation.asciidoc

@@ -39,10 +39,10 @@ Range agg = sr.getAggregations().get("agg");
 
 // For each entry
 for (Range.Bucket entry : agg.getBuckets()) {
-    String key = entry.getKey();                         // Date range as key
+    String key = entry.getKeyAsString();                // Date range as key
-    DateTime fromAsDate = (DateTime) entry.getFrom();    // Date bucket from as a Date
+    DateTime fromAsDate = (DateTime) entry.getFrom();   // Date bucket from as a Date
-    DateTime toAsDate = (DateTime) entry.getTo();        // Date bucket to as a Date
+    DateTime toAsDate = (DateTime) entry.getTo();       // Date bucket to as a Date
-    long docCount = entry.getDocCount();                 // Doc count
+    long docCount = entry.getDocCount();                // Doc count
 
     logger.info("key [{}], from [{}], to [{}], doc_count [{}]", key, fromAsDate, toAsDate, docCount);
 }

docs/java-api/aggregations/bucket/filter-aggregation.asciidoc

@@ -14,7 +14,7 @@ Here is an example on how to create the aggregation request:
 --------------------------------------------------
 AggregationBuilders
     .filter("agg")
-    .filter(FilterBuilders.termFilter("gender", "male"));
+    .filter(QueryBuilders.termQuery("gender", "male"));
 --------------------------------------------------
 
 

docs/java-api/aggregations/bucket/filters-aggregation.asciidoc

@@ -15,8 +15,8 @@ Here is an example on how to create the aggregation request:
 AggregationBuilder aggregation =
     AggregationBuilders
         .filters("agg")
-            .filter("men", FilterBuilders.termFilter("gender", "male"))
+            .filter("men", QueryBuilders.termQuery("gender", "male"))
-            .filter("women", FilterBuilders.termFilter("gender", "female"));
+            .filter("women", QueryBuilders.termQuery("gender", "female"));
 --------------------------------------------------
 
 
@@ -36,7 +36,7 @@ Filters agg = sr.getAggregations().get("agg");
 
 // For each entry
 for (Filters.Bucket entry : agg.getBuckets()) {
-    String key = entry.getKey();                    // bucket key
+    String key = entry.getKeyAsString();            // bucket key
     long docCount = entry.getDocCount();            // Doc count
     logger.info("key [{}], doc_count [{}]", key, docCount);
 }

docs/java-api/aggregations/bucket/geodistance-aggregation.asciidoc

@@ -40,10 +40,10 @@ Range agg = sr.getAggregations().get("agg");
 
 // For each entry
 for (Range.Bucket entry : agg.getBuckets()) {
-    String key = entry.getKey();                     // key as String
+    String key = entry.getKeyAsString();    // key as String
-    Number from = (Number) entry.getFrom();          // bucket from value
+    Number from = (Number) entry.getFrom(); // bucket from value
-    Number to = (Number) entry.getTo();              // bucket to value
+    Number to = (Number) entry.getTo();     // bucket to value
-    long docCount = entry.getDocCount();             // Doc count
+    long docCount = entry.getDocCount();    // Doc count
 
     logger.info("key [{}], from [{}], to [{}], doc_count [{}]", key, from, to, docCount);
 }

docs/java-api/aggregations/bucket/geohashgrid-aggregation.asciidoc

@@ -36,11 +36,11 @@ GeoHashGrid agg = sr.getAggregations().get("agg");
 
 // For each entry
 for (GeoHashGrid.Bucket entry : agg.getBuckets()) {
-    String key = entry.getKey();                        // key as String
+    String keyAsString = entry.getKeyAsString(); // key as String
-    GeoPoint keyAsGeoPoint = entry.getKeyAsGeoPoint();  // key as geo point
+    GeoPoint key = (GeoPoint) entry.getKey();    // key as geo point
-    long docCount = entry.getDocCount();                // Doc count
+    long docCount = entry.getDocCount();         // Doc count
 
-    logger.info("key [{}], point {}, doc_count [{}]", key, keyAsGeoPoint, docCount);
+    logger.info("key [{}], point {}, doc_count [{}]", keyAsString, key, docCount);
 }
 --------------------------------------------------
 

docs/java-api/aggregations/bucket/histogram-aggregation.asciidoc

@@ -36,8 +36,9 @@ Histogram agg = sr.getAggregations().get("agg");
 
 // For each entry
 for (Histogram.Bucket entry : agg.getBuckets()) {
-    Number key = (Number) entry.getKey();                    // Key
+    Long key = (Long) entry.getKey();       // Key
-    String keyAsString = entry.getKeyAsString();             // Key As String
+    long docCount = entry.getDocCount();    // Doc count
-    long docCount = entry.getDocCount();                     // Doc count
+
+    logger.info("key [{}], doc_count [{}]", key, docCount);
 }
 --------------------------------------------------

docs/java-api/aggregations/bucket/iprange-aggregation.asciidoc

@@ -46,11 +46,11 @@ import org.elasticsearch.search.aggregations.bucket.range.Range;
 [source,java]
 --------------------------------------------------
 // sr is here your SearchResponse object
-IPv4Range agg = sr.getAggregations().get("agg");
+Range agg = sr.getAggregations().get("agg");
 
 // For each entry
 for (Range.Bucket entry : agg.getBuckets()) {
-    String key = entry.getKey();                    // Ip range as key
+    String key = entry.getKeyAsString();            // Ip range as key
     String fromAsString = entry.getFromAsString();  // Ip bucket from as a String
     String toAsString = entry.getToAsString();      // Ip bucket to as a String
     long docCount = entry.getDocCount();            // Doc count

docs/java-api/aggregations/bucket/range-aggregation.asciidoc

@@ -38,10 +38,10 @@ Range agg = sr.getAggregations().get("agg");
 
 // For each entry
 for (Range.Bucket entry : agg.getBuckets()) {
-    String key = entry.getKey();                     // Range as key
+    String key = entry.getKeyAsString();             // Range as key
     Number from = (Number) entry.getFrom();          // Bucket from
     Number to = (Number) entry.getTo();              // Bucket to
-    long docCount = entry.getDocCount();             // Doc count
+    long docCount = entry.getDocCount();    // Doc count
 
     logger.info("key [{}], from [{}], to [{}], doc_count [{}]", key, from, to, docCount);
 }

docs/java-api/aggs.asciidoc

@@ -47,7 +47,7 @@ SearchResponse sr = node.client().prepareSearch()
         AggregationBuilders.terms("by_country").field("country")
         .subAggregation(AggregationBuilders.dateHistogram("by_year")
             .field("dateOfBirth")
-            .interval((DateHistogram.Interval.YEAR)
+            .interval((DateHistogramInterval.YEAR)
             .subAggregation(AggregationBuilders.avg("avg_children").field("children"))
         )
     )

docs/java-api/query-dsl-filters.asciidoc

@@ -416,7 +416,7 @@ See {ref}/query-dsl-query-filter.html[Query Filter]
 [source,java]
 --------------------------------------------------
 FilterBuilder filter = queryFilter(
-        queryString("this AND that OR thus")    <1>
+        queryStringQuery("this AND that OR thus")    <1>
     );
 --------------------------------------------------
 <1> query you want to wrap as a filter

docs/java-api/search.asciidoc

@@ -87,7 +87,7 @@ documentation
 [source,java]
 --------------------------------------------------
 SearchRequestBuilder srb1 = node.client()
-    .prepareSearch().setQuery(QueryBuilders.queryString("elasticsearch")).setSize(1);
+    .prepareSearch().setQuery(QueryBuilders.queryStringQuery("elasticsearch")).setSize(1);
 SearchRequestBuilder srb2 = node.client()
     .prepareSearch().setQuery(QueryBuilders.matchQuery("name", "kimchy")).setSize(1);
 
@@ -120,7 +120,7 @@ SearchResponse sr = node.client().prepareSearch()
     .addAggregation(
             AggregationBuilders.dateHistogram("agg2")
                     .field("birth")
-                    .interval(DateHistogram.Interval.YEAR)
+                    .interval(DateHistogramInterval.YEAR)
     )
     .execute().actionGet();