| /* |
| * 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.persistence.query; |
| |
| /** |
| * Denotes LOCATE(e1, e2, n) Expression. |
| * e1 : string to be located |
| * e2 : string to be searched |
| * n : starting poistion in e2, default is 1 |
| * |
| * @author Pinaki Poddar |
| * |
| */ |
| public class LocateExpression extends BinaryOperatorExpression { |
| |
| private static final long serialVersionUID = 1L; |
| private final Expression _start; |
| |
| public LocateExpression(Expression key, String str, int start) { |
| super(key, BinaryFunctionalOperator.LOCATE, |
| new ConstantExpression(str)); |
| _start = new ConstantExpression(start); |
| } |
| |
| public LocateExpression(Expression key, Expression str, int start) { |
| super(key, BinaryFunctionalOperator.LOCATE, str); |
| _start = new ConstantExpression(start); |
| } |
| |
| public LocateExpression(Expression key, String str, Expression start) { |
| super(key, BinaryFunctionalOperator.LOCATE, |
| new ConstantExpression(str)); |
| _start = start; |
| } |
| |
| public LocateExpression(Expression key, Expression str, Expression start) { |
| super(key, BinaryFunctionalOperator.LOCATE, str); |
| _start = start; |
| } |
| |
| @Override |
| public String asExpression(AliasContext ctx) { |
| String start = _start == null ? EMPTY : COMMA + |
| ((Visitable)_start).asExpression(ctx); |
| return new StringBuilder(_op.toString()) |
| .append(OPEN_BRACE) |
| .append(((Visitable)_e1).asExpression(ctx)) |
| .append(COMMA) |
| .append(((Visitable)_e2).asExpression(ctx)) |
| .append(start) |
| .append(CLOSE_BRACE).toString(); |
| } |
| |
| } |