Merge pull request elastic#11121 from cbuescher/feature/query-refacto…

…ring-boolquery

Query refactoring: BoolQueryBuilder and Parser

core/src/main/java/org/elasticsearch/common/io/stream/StreamInput.java

@@ -509,6 +509,20 @@ public <C> C readNamedWriteable() throws IOException {
         return namedWriteable.readFrom(this);
     }
 
+    /**
+     * Reads a list of {@link NamedWriteable} from the current stream, by first reading its size and then
+     * reading the individual objects using {@link #readNamedWriteable()}.
+     */
+    public <C> List<C> readNamedWritableList() throws IOException {
+        List<C> list = new ArrayList<>();
+        int size = readInt();
+        for (int i = 0; i < size; i++) {
+            C obj = readNamedWriteable();
+            list.add(obj);
+        }
+        return list;
+    }
+
     public static StreamInput wrap(BytesReference reference) {
         if (reference.hasArray() == false) {
             reference = reference.toBytesArray();

core/src/main/java/org/elasticsearch/common/io/stream/StreamOutput.java

@@ -457,4 +457,15 @@ public void writeNamedWriteable(NamedWriteable namedWriteable) throws IOExceptio
         writeString(namedWriteable.getName());
         namedWriteable.writeTo(this);
     }
+
+    /**
+     * Writes a list of {@link NamedWriteable} to the current stream, by first writing its size and then iterating over the objects
+     * in the list
+     */
+    public void writeNamedWritableList(List<? extends NamedWriteable> list) throws IOException {
+        writeInt(list.size());
+        for (NamedWriteable obj : list) {
+            writeNamedWriteable(obj);
+        }
+    }
 }