| /******************************************************************************* |
| * 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.olingo.odata2.core.uri.expression; |
| |
| import java.util.List; |
| |
| import org.apache.olingo.odata2.api.edm.EdmLiteral; |
| import org.apache.olingo.odata2.api.edm.EdmTyped; |
| import org.apache.olingo.odata2.api.uri.expression.BinaryExpression; |
| import org.apache.olingo.odata2.api.uri.expression.BinaryOperator; |
| import org.apache.olingo.odata2.api.uri.expression.ExpressionVisitor; |
| import org.apache.olingo.odata2.api.uri.expression.FilterExpression; |
| import org.apache.olingo.odata2.api.uri.expression.LiteralExpression; |
| import org.apache.olingo.odata2.api.uri.expression.MemberExpression; |
| import org.apache.olingo.odata2.api.uri.expression.MethodExpression; |
| import org.apache.olingo.odata2.api.uri.expression.MethodOperator; |
| import org.apache.olingo.odata2.api.uri.expression.OrderByExpression; |
| import org.apache.olingo.odata2.api.uri.expression.OrderExpression; |
| import org.apache.olingo.odata2.api.uri.expression.PropertyExpression; |
| import org.apache.olingo.odata2.api.uri.expression.SortOrder; |
| import org.apache.olingo.odata2.api.uri.expression.UnaryExpression; |
| import org.apache.olingo.odata2.api.uri.expression.UnaryOperator; |
| |
| public class VisitorTool implements ExpressionVisitor { |
| |
| @Override |
| public Object visitBinary(final BinaryExpression binaryExpression, final BinaryOperator operator, |
| final Object leftSide, final Object rightSide) { |
| return "{" + leftSide.toString() + " " + operator.toUriLiteral() + " " + rightSide.toString() + "}"; |
| } |
| |
| @Override |
| public Object visitFilterExpression(final FilterExpression filterExpression, final String expressionString, |
| final Object expression) { |
| return expression; |
| } |
| |
| @Override |
| public Object visitLiteral(final LiteralExpression literal, final EdmLiteral edmLiteral) { |
| return "" + literal.getUriLiteral() + ""; |
| } |
| |
| @Override |
| public Object visitMethod(final MethodExpression methodExpression, final MethodOperator method, |
| final List<Object> retParameters) { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("{"); |
| sb.append(method.toUriLiteral()); |
| |
| sb.append("("); |
| for (int i = 0; i < retParameters.size(); i++) { |
| if (i != 0) { |
| sb.append(","); |
| } |
| sb.append(retParameters.get(i)); |
| } |
| |
| sb.append(")}"); |
| |
| return sb.toString(); |
| } |
| |
| @Override |
| public Object visitMember(final MemberExpression memberExpression, final Object source, final Object path) { |
| return "{" + source.toString() + "/" + path.toString() + "}"; |
| } |
| |
| @Override |
| public Object visitProperty(final PropertyExpression literal, final String uriLiteral, final EdmTyped edmProperty) { |
| return uriLiteral; |
| } |
| |
| @Override |
| public Object visitUnary(final UnaryExpression unaryExpression, final UnaryOperator operator, final Object operand) { |
| return "{" + operator.toUriLiteral() + " " + operand.toString() + "}"; |
| } |
| |
| @Override |
| public Object visitOrderByExpression(final OrderByExpression orderByExpression, final String expressionString, |
| final List<Object> orders) { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("{"); |
| sb.append("oc"); |
| |
| sb.append("("); |
| for (int i = 0; i < orders.size(); i++) { |
| if (i != 0) { |
| sb.append(","); |
| } |
| sb.append(orders.get(i)); |
| } |
| |
| sb.append(")}"); |
| |
| return sb.toString(); |
| } |
| |
| @Override |
| public Object visitOrder(final OrderExpression orderExpression, final Object filterResult, |
| final SortOrder sortOrder) { |
| return "{o(" + filterResult + ", " + sortOrder.toString() + ")}"; |
| } |
| |
| } |