1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, 13 * software distributed under the License is distributed on an 14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 15 * KIND, either express or implied. See the License for the 16 * specific language governing permissions and limitations 17 * under the License. 18 */ 19 package org.apache.chemistry.opencmis.server.support.query; 20 21 import org.antlr.runtime.tree.Tree; 22 23 /** 24 * Base interface for a tree walker of a WHERE clause. 25 * <p> 26 * COntains only a single method used by the ANTLR query walker to 27 * initiate a tree walk for evaluating the query. You can inherit from 28 * this interface if you want to have your own walking mechanism 29 * <p> 30 * The method {@link walkClause} is the entry point. 31 */ 32 public interface PredicateWalkerBase { 33 34 Boolean walkPredicate(Tree whereNode); 35 36 }