| grammar FieldSpecifierNotation; |
| |
| @header { |
| /* |
| * 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.beam.sdk.schemas.parser.generated; |
| } |
| |
| fieldSpecifier: dotExpression; |
| |
| dotExpression: dotExpressionComponent ('.' dotExpressionComponent)*; |
| |
| dotExpressionComponent: qualifiedComponent # qualifyComponent |
| | IDENTIFIER # simpleIdentifier |
| | WILDCARD # wildcard |
| ; |
| |
| qualifiedComponent: IDENTIFIER qualifierList |
| ; |
| |
| qualifierList: arrayQualifier (qualifierList)* # arrayQualifierList |
| | mapQualifier (qualifierList)* # mapQualifierList |
| ; |
| |
| arrayQualifier: '[]' |
| | '[*]' |
| ; |
| |
| mapQualifier: '{}' |
| | '{*}' |
| ; |
| |
| IDENTIFIER: [a-zA-Z0-9_]+ ; |
| |
| WILDCARD: '*'; |
| |
| WS: [ \t\n\r]+ -> skip ; |