Add String based value querying and setting to DataView (#2611)

* Add String based value querying and setting to DataView

* Add DataView#streamRootKeys

Author: aromaa

src/main/java/org/spongepowered/api/data/persistence/DataContainer.java

@@ -58,6 +58,11 @@ static DataContainer createNew(SafetyMode safety) {
     @Override
     DataContainer set(DataQuery path, Object value);
 
+    @Override
+    default DataContainer set(String key, Object value) {
+        return this.set(DataQuery.of(key), value);
+    }
+
     @Override
     DataContainer remove(DataQuery path);
 }

src/main/java/org/spongepowered/api/data/persistence/DataView.java

@@ -38,6 +38,7 @@
 import java.util.Objects;
 import java.util.Optional;
 import java.util.Set;
+import java.util.stream.Stream;
 
 /**
  * Represents an object of data represented by a map.
@@ -106,6 +107,15 @@ public interface DataView {
      */
     Set<DataQuery> keys(boolean deep);
 
+    /**
+     * Gets a Stream containing all root keys for this {@link DataView}.
+     *
+     * @return Stream of root keys of this container
+     */
+    default Stream<String> streamRootKeys() {
+        return this.keys(false).stream().map(k -> k.parts().getFirst());
+    }
+
     /**
      * Gets a Map containing all keys and their values for this {@link DataView}.
      *
@@ -121,6 +131,15 @@ public interface DataView {
      */
     Map<DataQuery, Object> values(boolean deep);
 
+    /**
+     * Gets a Stream containing all root keys and their values for this {@link DataView}.
+     *
+     * @return Stream of root keys and values of this container
+     */
+    default Stream<Map.Entry<String, Object>> streamRootValues() {
+        return this.values(false).entrySet().stream().map(entry -> Map.entry(entry.getKey().parts().getFirst(), entry.getValue()));
+    }
+
     /**
      * Returns whether this {@link DataView} contains the given path.
      *
@@ -158,6 +177,17 @@ public interface DataView {
      */
     DataView set(DataQuery path, Object value);
 
+    /**
+     * Sets the given Object value to this {@link DataView}'s key.
+     *
+     * @param key The key of the object to set
+     * @param value The value of the data
+     * @return This view, for chaining
+     */
+    default DataView set(String key, Object value) {
+        return this.set(DataQuery.of(key), value);
+    }
+
     /**
      * Removes the data associated to the given path relative to this
      * {@link DataView}'s path.