| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.openjpa.kernel.exps; |
| |
| import java.util.Collection; |
| import java.util.Map; |
| |
| /** |
| * {@link BindVariableExpression} for map key sets. |
| * |
| * @author Abe White |
| */ |
| class BindKeyVariableExpression |
| extends BindVariableExpression { |
| |
| /** |
| * Constructor. |
| * |
| * @param var the bound variable |
| * @param val the value the variable is bound to |
| */ |
| public BindKeyVariableExpression(BoundVariable var, Val val) { |
| super(var, val); |
| } |
| |
| protected Collection getCollection(Object values) { |
| Map map = (Map) values; |
| return (map == null) ? null : map.keySet(); |
| } |
| } |
| |