| /******************************************************************************* |
| * 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.sling.scripting.sightly.compiler.expression; |
| |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.ArrayLiteral; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.BinaryOperation; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.BooleanConstant; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.Identifier; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.MapLiteral; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.NullLiteral; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.NumericConstant; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.PropertyAccess; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.RuntimeCall; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.StringConstant; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.TernaryOperator; |
| import org.apache.sling.scripting.sightly.compiler.expression.nodes.UnaryOperation; |
| |
| import org.osgi.annotation.versioning.ProviderType; |
| |
| /** |
| * A {@code NodeVisitor} represents the mechanism through which {@link ExpressionNode} entities are processed. |
| * |
| * @param <T> the type of the object that's returned after an {@link ExpressionNode} evaluation |
| */ |
| @ProviderType |
| public interface NodeVisitor<T> { |
| |
| /** |
| * Evaluate a {@link PropertyAccess} node. |
| * |
| * @param propertyAccess the node to evaluate |
| * @return the evaluation result |
| */ |
| T evaluate(PropertyAccess propertyAccess); |
| |
| /** |
| * Evaluate an {@link Identifier} node. |
| * |
| * @param identifier the node to evaluate |
| * @return the evaluation result |
| */ |
| T evaluate(Identifier identifier); |
| |
| /** |
| * Evaluate a {@link StringConstant} node. |
| * |
| * @param text the node to evaluate |
| * @return the evaluation result |
| */ |
| T evaluate(StringConstant text); |
| |
| /** |
| * Evaluate a {@link BinaryOperation} node. |
| * |
| * @param binaryOperation the node to evaluate |
| * @return the evaluation result |
| */ |
| T evaluate(BinaryOperation binaryOperation); |
| |
| /** |
| * Evaluate a {@link BooleanConstant} node. |
| * |
| * @param booleanConstant the node to evaluate |
| * @return the evaluation result |
| */ |
| T evaluate(BooleanConstant booleanConstant); |
| |
| /** |
| * Evaluate a {@link NumericConstant} node. |
| * |
| * @param numericConstant the node to evaluate |
| * @return the evaluation result |
| */ |
| T evaluate(NumericConstant numericConstant); |
| |
| /** |
| * Evaluate a {@link UnaryOperation} node. |
| * |
| * @param unaryOperation the node to evaluate |
| * @return the evaluation result |
| */ |
| T evaluate(UnaryOperation unaryOperation); |
| |
| /** |
| * Evaluate a {@link TernaryOperator} node. |
| * |
| * @param ternaryOperator the node to evaluate |
| * @return the evaluation result |
| */ |
| T evaluate(TernaryOperator ternaryOperator); |
| |
| /** |
| * Evaluate a {@link RuntimeCall} node. |
| * |
| * @param runtimeCall the node to evaluate |
| * @return the evaluation result |
| */ |
| T evaluate(RuntimeCall runtimeCall); |
| |
| /** |
| * Evaluate a {@link MapLiteral} node. |
| * |
| * @param mapLiteral the node to evaluate |
| * @return the evaluation result |
| */ |
| T evaluate(MapLiteral mapLiteral); |
| |
| /** |
| * Evaluate a {@link ArrayLiteral} node. |
| * |
| * @param arrayLiteral the node to evaluate |
| * @return the evaluation result |
| */ |
| T evaluate(ArrayLiteral arrayLiteral); |
| |
| /** |
| * Evaluate a {@link NullLiteral} node. |
| * |
| * @param nullLiteral the node to evaluate |
| * @return the evaluation result |
| */ |
| T evaluate(NullLiteral nullLiteral); |
| |
| } |