/* Copyright 2013 Red Hat, Inc. and/or its affiliates. This file is part of lightblue. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ package com.redhat.lightblue.query; import com.fasterxml.jackson.databind.node.ObjectNode; import com.redhat.lightblue.util.Error; /** * Base class for array update expressions * <pre> * array_update_expression := { $append : { path : rvalue_expression } } | * { $append : { path : [ rvalue_expression, ... ] }} | * { $insert : { path : rvalue_expression } } | * { $insert : { path : [ rvalue_expression,...] }} | * { $foreach : { path : update_query_expression, * $update : foreach_update_expression } } * </pre> */ public abstract class ArrayUpdateExpression extends PartialUpdateExpression { private static final long serialVersionUID = 1L; /** * Parses an array update expression using the given json object */ public static ArrayUpdateExpression fromJson(ObjectNode node) { if (node.has(UpdateOperator._append.toString()) || node.has(UpdateOperator._insert.toString())) { return ArrayAddExpression.fromJson(node); } else if (node.has(UpdateOperator._foreach.toString())) { return ForEachExpression.fromJson(node); } else { throw Error.get(QueryConstants.ERR_INVALID_ARRAY_UPDATE_EXPRESSION, node.toString()); } } }