| 1 | /* |
|---|---|
| 2 | * Copyright (C) 2007-2010 Júlio Vilmar Gesser. |
| 3 | * Copyright (C) 2011, 2013-2020 The JavaParser Team. |
| 4 | * |
| 5 | * This file is part of JavaParser. |
| 6 | * |
| 7 | * JavaParser can be used either under the terms of |
| 8 | * a) the GNU Lesser General Public License as published by |
| 9 | * the Free Software Foundation, either version 3 of the License, or |
| 10 | * (at your option) any later version. |
| 11 | * b) the terms of the Apache License |
| 12 | * |
| 13 | * You should have received a copy of both licenses in LICENCE.LGPL and |
| 14 | * LICENCE.APACHE. Please refer to those files for details. |
| 15 | * |
| 16 | * JavaParser is distributed in the hope that it will be useful, |
| 17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 19 | * GNU Lesser General Public License for more details. |
| 20 | */ |
| 21 | |
| 22 | package com.github.javaparser.ast.validator; |
| 23 | |
| 24 | import com.github.javaparser.ast.Node; |
| 25 | import com.github.javaparser.ast.NodeList; |
| 26 | import com.github.javaparser.ast.expr.IntegerLiteralExpr; |
| 27 | import com.github.javaparser.ast.expr.VariableDeclarationExpr; |
| 28 | import com.github.javaparser.ast.nodeTypes.NodeWithTypeArguments; |
| 29 | import com.github.javaparser.ast.stmt.ForEachStmt; |
| 30 | import com.github.javaparser.ast.stmt.SwitchEntry; |
| 31 | import com.github.javaparser.ast.type.PrimitiveType; |
| 32 | import com.github.javaparser.ast.type.Type; |
| 33 | |
| 34 | import java.util.Optional; |
| 35 | |
| 36 | /** |
| 37 | * This validator validates according to Java 5 syntax rules. |
| 38 | */ |
| 39 | public class Java5Validator extends Java1_4Validator { |
| 40 | final Validator genericsWithoutDiamondOperator = new TreeVisitorValidator((node, reporter) -> { |
| 41 | if (node instanceof NodeWithTypeArguments) { |
| 42 | Optional<NodeList<Type>> typeArguments = ((NodeWithTypeArguments<? extends Node>) node).getTypeArguments(); |
| 43 | if (typeArguments.isPresent() && typeArguments.get().isEmpty()) { |
| 44 | reporter.report(node, "The diamond operator is not supported."); |
| 45 | } |
| 46 | } |
| 47 | }); |
| 48 | |
| 49 | protected final Validator noPrimitiveGenericArguments = new TreeVisitorValidator((node, reporter) -> { |
| 50 | if (node instanceof NodeWithTypeArguments) { |
| 51 | Optional<NodeList<Type>> typeArguments = ((NodeWithTypeArguments<? extends Node>) node).getTypeArguments(); |
| 52 | typeArguments.ifPresent(types -> types.forEach(ty -> { |
| 53 | if (ty instanceof PrimitiveType) { |
| 54 | reporter.report(node, "Type arguments may not be primitive."); |
| 55 | } |
| 56 | })); |
| 57 | } |
| 58 | }); |
| 59 | |
| 60 | // Enhanced for statements were introduced in Java 5. There must be exactly one declared variable, and the only |
| 61 | // allowed modifier is FINAL. |
| 62 | final Validator forEachStmt = new SingleNodeTypeValidator<>(ForEachStmt.class, (node, reporter) -> { |
| 63 | VariableDeclarationExpr declaration = node.getVariable(); |
| 64 | // assert that the variable declaration expression has exactly one variable declarator |
| 65 | if (declaration.getVariables().size() != 1) { |
| 66 | reporter.report(node, "A foreach statement's variable declaration must have exactly one variable " + |
| 67 | "declarator. Given: " + declaration.getVariables().size() + "."); |
| 68 | } |
| 69 | }); |
| 70 | |
| 71 | final Validator enumNotAllowed = new ReservedKeywordValidator("enum"); |
| 72 | |
| 73 | public Java5Validator() { |
| 74 | super(); |
| 75 | replace(noGenerics, genericsWithoutDiamondOperator); |
| 76 | add(noPrimitiveGenericArguments); |
| 77 | add(enumNotAllowed); |
| 78 | add(forEachStmt); |
| 79 | |
| 80 | // TODO validate annotations on classes, fields and methods but nowhere else |
| 81 | // The following is probably too simple. |
| 82 | remove(noAnnotations); |
| 83 | |
| 84 | remove(noEnums); |
| 85 | remove(noVarargs); |
| 86 | remove(noForEach); |
| 87 | remove(noStaticImports); |
| 88 | } |
| 89 | } |
| 90 |
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