| //////////////////////////////////////////////////////////////////////////////// |
| // |
| // 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.royale.linter.rules; |
| |
| import java.util.Collection; |
| import java.util.HashMap; |
| import java.util.HashSet; |
| import java.util.Map; |
| import java.util.Set; |
| |
| import org.apache.royale.compiler.internal.tree.as.ContainerNode; |
| import org.apache.royale.compiler.problems.CompilerProblem; |
| import org.apache.royale.compiler.problems.ICompilerProblem; |
| import org.apache.royale.compiler.tree.ASTNodeID; |
| import org.apache.royale.compiler.tree.as.IASNode; |
| import org.apache.royale.compiler.tree.as.IExpressionNode; |
| import org.apache.royale.compiler.tree.as.IIdentifierNode; |
| import org.apache.royale.compiler.tree.as.ILiteralContainerNode; |
| import org.apache.royale.compiler.tree.as.ILiteralNode; |
| import org.apache.royale.compiler.tree.as.ILiteralNode.LiteralType; |
| import org.apache.royale.compiler.tree.as.IObjectLiteralValuePairNode; |
| import org.apache.royale.linter.LinterRule; |
| import org.apache.royale.linter.NodeVisitor; |
| import org.apache.royale.linter.TokenQuery; |
| import org.apache.royale.linter.problems.ILinterProblem; |
| |
| /** |
| * Check that each key in an object literal is unique. |
| */ |
| public class NoDuplicateObjectKeysRule extends LinterRule { |
| @Override |
| public Map<ASTNodeID, NodeVisitor> getNodeVisitors() { |
| Map<ASTNodeID, NodeVisitor> result = new HashMap<>(); |
| result.put(ASTNodeID.ObjectLiteralExpressionID, (node, tokenQuery, problems) -> { |
| checkLiteralContainerNode((ILiteralContainerNode) node, tokenQuery, problems); |
| }); |
| return result; |
| } |
| |
| private void checkLiteralContainerNode(ILiteralContainerNode objectLiteralNode, TokenQuery tokenQuery, Collection<ICompilerProblem> problems) { |
| if (!LiteralType.OBJECT.equals(objectLiteralNode.getLiteralType())) { |
| return; |
| } |
| ContainerNode contentsNode = objectLiteralNode.getContentsNode(); |
| if (contentsNode == null) { |
| return; |
| } |
| Set<String> keyNames = new HashSet<>(); |
| for (int i = 0; i < contentsNode.getChildCount(); i++) { |
| IASNode child = contentsNode.getChild(i); |
| if (!(child instanceof IObjectLiteralValuePairNode)) { |
| continue; |
| } |
| String keyName = null; |
| IObjectLiteralValuePairNode valuePairNode = (IObjectLiteralValuePairNode) child; |
| IExpressionNode nameNode = valuePairNode.getNameNode(); |
| if (nameNode instanceof IIdentifierNode) { |
| IIdentifierNode identifierNode = (IIdentifierNode) nameNode; |
| keyName = identifierNode.getName(); |
| } else if (nameNode instanceof ILiteralNode) { |
| ILiteralNode literalNode = (ILiteralNode) nameNode; |
| if (!LiteralType.STRING.equals(literalNode.getLiteralType())) { |
| continue; |
| } |
| keyName = literalNode.getValue(); |
| } |
| if (keyName != null) { |
| if (keyNames.contains(keyName)) { |
| problems.add(new NoDuplicateObjectKeysLinterProblem(nameNode, keyName)); |
| } else { |
| keyNames.add(keyName); |
| } |
| } |
| } |
| } |
| |
| public static class NoDuplicateObjectKeysLinterProblem extends CompilerProblem implements ILinterProblem { |
| public static final String DESCRIPTION = "Object literal contains duplicate key '${keyName}'"; |
| |
| public NoDuplicateObjectKeysLinterProblem(IExpressionNode node, String keyName) |
| { |
| super(node); |
| this.keyName = keyName; |
| } |
| |
| public String keyName; |
| } |
| } |