| /* |
| * 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.tuweni.toml; |
| |
| import static java.util.Objects.requireNonNull; |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.Reader; |
| import java.nio.channels.ReadableByteChannel; |
| import java.nio.file.Path; |
| import java.util.List; |
| import java.util.StringJoiner; |
| import java.util.regex.Pattern; |
| |
| import org.antlr.v4.runtime.CharStream; |
| import org.antlr.v4.runtime.CharStreams; |
| |
| /** |
| * Methods for parsing data stored in Tom's Obvious, Minimal Language (TOML). |
| */ |
| public final class Toml { |
| private static final Pattern simpleKeyPattern = Pattern.compile("^[A-Za-z0-9_-]+$"); |
| |
| private Toml() {} |
| |
| /** |
| * Parse a TOML string. |
| * |
| * @param input The input to parse. |
| * @return The parse result. |
| */ |
| public static TomlParseResult parse(String input) { |
| return parse(input, TomlVersion.LATEST); |
| } |
| |
| /** |
| * Parse a TOML string. |
| * |
| * @param input The input to parse. |
| * @param version The version level to parse at. |
| * @return The parse result. |
| */ |
| public static TomlParseResult parse(String input, TomlVersion version) { |
| CharStream stream = CharStreams.fromString(input); |
| return Parser.parse(stream, version.canonical); |
| } |
| |
| /** |
| * Parse a TOML file. |
| * |
| * @param file The input file to parse. |
| * @return The parse result. |
| * @throws IOException If an IO error occurs. |
| */ |
| public static TomlParseResult parse(Path file) throws IOException { |
| return parse(file, TomlVersion.LATEST); |
| } |
| |
| /** |
| * Parse a TOML file. |
| * |
| * @param file The input file to parse. |
| * @param version The version level to parse at. |
| * @return The parse result. |
| * @throws IOException If an IO error occurs. |
| */ |
| public static TomlParseResult parse(Path file, TomlVersion version) throws IOException { |
| CharStream stream = CharStreams.fromPath(file); |
| return Parser.parse(stream, version.canonical); |
| } |
| |
| /** |
| * Parse a TOML input stream. |
| * |
| * @param is The input stream to read the TOML document from. |
| * @return The parse result. |
| * @throws IOException If an IO error occurs. |
| */ |
| public static TomlParseResult parse(InputStream is) throws IOException { |
| return parse(is, TomlVersion.LATEST); |
| } |
| |
| /** |
| * Parse a TOML input stream. |
| * |
| * @param is The input stream to read the TOML document from. |
| * @param version The version level to parse at. |
| * @return The parse result. |
| * @throws IOException If an IO error occurs. |
| */ |
| public static TomlParseResult parse(InputStream is, TomlVersion version) throws IOException { |
| CharStream stream = CharStreams.fromStream(is); |
| return Parser.parse(stream, version.canonical); |
| } |
| |
| /** |
| * Parse a TOML reader. |
| * |
| * @param reader The reader to obtain the TOML document from. |
| * @return The parse result. |
| * @throws IOException If an IO error occurs. |
| */ |
| public static TomlParseResult parse(Reader reader) throws IOException { |
| return parse(reader, TomlVersion.LATEST); |
| } |
| |
| /** |
| * Parse a TOML input stream. |
| * |
| * @param reader The reader to obtain the TOML document from. |
| * @param version The version level to parse at. |
| * @return The parse result. |
| * @throws IOException If an IO error occurs. |
| */ |
| public static TomlParseResult parse(Reader reader, TomlVersion version) throws IOException { |
| CharStream stream = CharStreams.fromReader(reader); |
| return Parser.parse(stream, version.canonical); |
| } |
| |
| /** |
| * Parse a TOML reader. |
| * |
| * @param channel The channel to read the TOML document from. |
| * @return The parse result. |
| * @throws IOException If an IO error occurs. |
| */ |
| public static TomlParseResult parse(ReadableByteChannel channel) throws IOException { |
| return parse(channel, TomlVersion.LATEST); |
| } |
| |
| /** |
| * Parse a TOML input stream. |
| * |
| * @param channel The channel to read the TOML document from. |
| * @param version The version level to parse at. |
| * @return The parse result. |
| * @throws IOException If an IO error occurs. |
| */ |
| public static TomlParseResult parse(ReadableByteChannel channel, TomlVersion version) throws IOException { |
| CharStream stream = CharStreams.fromChannel(channel); |
| return Parser.parse(stream, version.canonical); |
| } |
| |
| /** |
| * Parse a dotted key into individual parts. |
| * |
| * @param dottedKey A dotted key (e.g. {@code server.address.port}). |
| * @return A list of individual keys in the path. |
| * @throws IllegalArgumentException If the dotted key cannot be parsed. |
| */ |
| public static List<String> parseDottedKey(String dottedKey) { |
| requireNonNull(dottedKey); |
| return Parser.parseDottedKey(dottedKey); |
| } |
| |
| /** |
| * Join a list of keys into a single dotted key string. |
| * |
| * @param path The list of keys that form the path. |
| * @return The path string. |
| */ |
| public static String joinKeyPath(List<String> path) { |
| requireNonNull(path); |
| |
| StringJoiner joiner = new StringJoiner("."); |
| for (String key : path) { |
| if (simpleKeyPattern.matcher(key).matches()) { |
| joiner.add(key); |
| } else { |
| joiner.add("\"" + tomlEscape(key) + '\"'); |
| } |
| } |
| return joiner.toString(); |
| } |
| |
| /** |
| * Get the canonical form of the dotted key. |
| * |
| * @param dottedKey A dotted key (e.g. {@code server.address.port}). |
| * @return The canonical form of the dotted key. |
| * @throws IllegalArgumentException If the dotted key cannot be parsed. |
| */ |
| public static String canonicalDottedKey(String dottedKey) { |
| return joinKeyPath(parseDottedKey(dottedKey)); |
| } |
| |
| /** |
| * Escape a text string using the TOML escape sequences. |
| * |
| * @param text The text string to escape. |
| * @return A {@link StringBuilder} holding the results of escaping the text. |
| */ |
| public static StringBuilder tomlEscape(String text) { |
| final StringBuilder out = new StringBuilder(); |
| for (int i = 0; i < text.length(); i++) { |
| int codepoint = text.codePointAt(i); |
| if (Character.charCount(codepoint) > 1) { |
| out.append("\\U").append(String.format("%08x", codepoint)); |
| ++i; |
| continue; |
| } |
| |
| char ch = Character.toChars(codepoint)[0]; |
| if (ch == '\'') { |
| out.append("\\'"); |
| continue; |
| } |
| if (ch >= 0x20 && ch < 0x7F) { |
| out.append(ch); |
| continue; |
| } |
| |
| switch (ch) { |
| case '\t': |
| out.append("\\t"); |
| break; |
| case '\b': |
| out.append("\\b"); |
| break; |
| case '\n': |
| out.append("\\n"); |
| break; |
| case '\r': |
| out.append("\\r"); |
| break; |
| case '\f': |
| out.append("\\f"); |
| break; |
| default: |
| out.append("\\u").append(String.format("%04x", codepoint)); |
| } |
| } |
| return out; |
| } |
| } |