| /* |
| * 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.geode.cache.query.internal; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Nested name scope for name resolution Currently allow only one iterator per scope, and can be |
| * known by zero or one identifier |
| * |
| * @version $Revision: 1.1 $ |
| * |
| */ |
| class QScope { |
| |
| private final List<RuntimeIterator> iterators = new ArrayList<>(); |
| /** if there is exactly one index lookup in this scope */ |
| boolean _oneIndexLookup = false; |
| /** set if scope evaluation is limited up to this iterator */ |
| private RuntimeIterator limit = null; |
| private final int scopeID; |
| |
| /** |
| * |
| * @param scopeID The scopeID assosciated with the scope |
| */ |
| QScope(int scopeID) { |
| this.scopeID = scopeID; |
| } |
| |
| void setLimit(RuntimeIterator iter) { |
| this.limit = iter; |
| } |
| |
| RuntimeIterator getLimit() { |
| return limit; |
| } |
| |
| void bindIterator(RuntimeIterator iterator) { |
| iterators.add(iterator); |
| iterator.setInternalId("iter" + iterators.size()); |
| } |
| |
| CompiledValue resolve(String name) { |
| for (RuntimeIterator _iterator : iterators) { |
| if (_iterator != null && name.equals(_iterator.getName())) { |
| return _iterator; |
| } |
| } |
| return null; |
| } |
| |
| List<RuntimeIterator> getIterators() { |
| return iterators; |
| } |
| |
| /** |
| * |
| * @return unique int identifying the scope. It also indicates the relative visibility of scopes, |
| * with higher scope being able to see iterators of lower scope. |
| */ |
| int getScopeID() { |
| return scopeID; |
| } |
| |
| } |