Add list position changing Lambdas

Initial shot at repositioning Lambdas.

Lambdas/Lists/ListReposition/src/ListRepositionActor.java

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+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.HashMap;
+import java.util.Map;
+
+public class ListRepositionActor implements CallHandler {
+
+    private Connection connection;
+    private String cognitoID;
+
+    public ListRepositionActor(Connection connection, String cognitoID) {
+        this.connection = connection;
+        this.cognitoID = cognitoID;
+    }
+
+    final private String GET_PRIOR_POSITON = "SELECT uiPosition FROM ListSharee WHERE userID = ? AND listID = ?;";
+    final private String SET_NEW_POSITON = "UPDATE ListSharee SET uiPosition = ? WHERE userID = ? AND listID = ?;";
+    final private String DECREMENT_HIGHER_POSITIONS = "UPDATE ListSharee SET uiPosition = uiPosition - 1 WHERE uiPosition > ? AND userID = ?;";
+    final private String INCREMENT_GEQ_POSITIONS = "UPDATE ListSharee SET uiPosition = uiPosition + 1 WHERE uiPosition >= ? AND userID = ?;";
+
+
+    public Object conductAction(Map<String, Object> bodyMap, HashMap<String, String> queryString, String cognitoID) throws SQLException {
+        Integer listID = (Integer) bodyMap.get("listID");
+        Integer newPosition = (Integer) bodyMap.get("newPosition");
+
+        PreparedStatement getPriorPosition = connection.prepareStatement(GET_PRIOR_POSITON);
+        getPriorPosition.setString(1, cognitoID);
+        getPriorPosition.setInt(2, listID);
+        ResultSet priorPositionRS = getPriorPosition.executeQuery();
+        if (!priorPositionRS.next()) {
+            throw new IllegalArgumentException("Bad listID for user");
+        }
+        Integer priorPosition = priorPositionRS.getInt("uiPosition");
+
+        PreparedStatement fillPriorPosition = connection.prepareStatement(DECREMENT_HIGHER_POSITIONS);
+        fillPriorPosition.setInt(1, priorPosition);
+        fillPriorPosition.setString(2, cognitoID);
+        System.out.println(fillPriorPosition);
+        fillPriorPosition.executeUpdate();
+
+        PreparedStatement openNewPosition = connection.prepareStatement(INCREMENT_GEQ_POSITIONS);
+        openNewPosition.setInt(1, priorPosition);
+        openNewPosition.setString(2, cognitoID);
+        System.out.println(openNewPosition);
+        openNewPosition.executeUpdate();
+
+        PreparedStatement setNewPosition = connection.prepareStatement(SET_NEW_POSITON);
+        setNewPosition.setInt(1, newPosition);
+        setNewPosition.setString(2, cognitoID);
+        setNewPosition.setInt(3, listID);
+        System.out.println(setNewPosition);
+        setNewPosition.executeUpdate();
+
+        connection.commit();
+        return null;
+    }
+
+}

Lambdas/Lists/ListReposition/src/ListRepositionPUT.java

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+import com.amazonaws.services.lambda.runtime.Context;
+import com.amazonaws.services.lambda.runtime.RequestHandler;
+
+import java.util.Map;
+
+public class ListRepositionPUT  implements RequestHandler<Map<String,Object>, Object> {
+
+    public Object handleRequest(Map<String, Object> inputMap, Context unfilled) {
+        return BasicHandler.handleRequest(inputMap, unfilled, ListRepositionActor.class);
+    }
+}