| /* |
| * 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.codehaus.groovy.control; |
| |
| import org.codehaus.groovy.ast.ClassCodeVisitorSupport; |
| import org.codehaus.groovy.ast.ClassHelper; |
| import org.codehaus.groovy.ast.ClassNode; |
| import org.codehaus.groovy.ast.expr.BinaryExpression; |
| import org.codehaus.groovy.ast.expr.ClassExpression; |
| import org.codehaus.groovy.ast.expr.Expression; |
| import org.codehaus.groovy.syntax.Types; |
| |
| public abstract class InstanceOfVerifier extends ClassCodeVisitorSupport { |
| |
| @Override |
| public void visitBinaryExpression(BinaryExpression expression) { |
| if (expression.getOperation().isA(Types.INSTANCEOF_OPERATOR) && |
| expression.getRightExpression() instanceof ClassExpression) { |
| ClassNode referenceType = expression.getRightExpression().getType(); |
| |
| if (ClassHelper.isPrimitiveType(referenceType)) { |
| addTypeError(expression.getRightExpression(), "primitive type " + referenceType.getName()); |
| } else { |
| while (referenceType.isArray()) { |
| referenceType = referenceType.getComponentType(); |
| } |
| |
| if (referenceType.isGenericsPlaceHolder()) { |
| addTypeError(expression.getRightExpression(), "type parameter " + referenceType.getUnresolvedName() + |
| ". Use its erasure " + referenceType.getNameWithoutPackage() + " instead since further generic type information will be erased at runtime"); |
| } else if (referenceType.getGenericsTypes() != null) { |
| // TODO: Cannot perform instanceof check against parameterized type Class<Type>. Use the form Class<?> instead since further eneric type information will be erased at runtime |
| } |
| } |
| } |
| super.visitBinaryExpression(expression); |
| } |
| |
| private void addTypeError(Expression referenceExpr, String referenceType) { |
| addError("Cannot perform instanceof check against " + referenceType, referenceExpr); |
| } |
| } |