1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package parser.elements 18 19 import lexer.Token 20 import lexer.TokenCategory 21 import lexer.TokenGrammar 22 import parser.peekPreviousToken 23 import parser.peekToken 24 import java.text.ParseException 25 26 class AnnotationParser(iter: ListIterator<Token>, var shouldResetIterator: Boolean = false) : AbstractParser(iter) { 27 28 lateinit var name: TokenGrammar 29 lateinit var value: String 30 31 init { 32 parseTokens(scanTokens(iter)) 33 if (shouldResetIterator) resetIterator(iter) 34 } 35 36 override fun scanTokens(iter: ListIterator<Token>): List<Token> { 37 val tokens = mutableListOf<Token>() 38 //depending how called, queue up annotation 39 if (peekToken(iter)?.identifier == TokenGrammar.AT) iter.next() 40 if (peekPreviousToken(iter)?.category == TokenCategory.Annotation) iter.previous() 41 42 if (peekToken(iter)!!.category != TokenCategory.Annotation) 43 throw ParseException("Doc token sequence must begin with an annotation", this.indexStart) 44 45 //just one token, info embedded 46 tokens.add(iter.next()) 47 return tokens 48 } 49 50 override fun parseTokens(tokens: List<Token>) { 51 val iter = tokens.listIterator() 52 assert(peekToken(iter)!!.category == TokenCategory.Annotation) 53 var token = iter.next() 54 55 this.name = token.identifier 56 this.value = parseAnnotationValue(token) 57 } 58 59 //capture text between parens 60 private fun parseAnnotationValue(token: Token): String { 61 return Regex(""".*\((.*)\).*""") 62 .matchEntire(token.value) 63 ?.groups?.get(1) 64 ?.value?.trim() 65 ?: "" 66 } 67 }
