| // *************************************************************************************************************************** |
| // * 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.juneau.uon; |
| |
| import static org.apache.juneau.internal.StringUtils.*; |
| |
| import org.apache.juneau.internal.*; |
| |
| /** |
| * Utility methods for the UON and UrlEncoding serializers and parsers. |
| */ |
| public final class UonUtils { |
| |
| private static final AsciiSet needsQuoteChars = AsciiSet.create("),=\n\t\r\b\f "); |
| private static final AsciiSet maybeNeedsQuotesFirstChar = AsciiSet.create("),=\n\t\r\b\f tfn+-.#0123456789"); |
| |
| /** |
| * Returns <jk>true</jk> if the specified string needs to be quoted per UON notation. |
| * |
| * <p> |
| * For example, strings that start with '(' or '@' or look like boolean or numeric values need to be quoted. |
| * |
| * @param s The string to test. |
| * @return <jk>true</jk> if the specified string needs to be quoted per UON notation. |
| */ |
| public static final boolean needsQuotes(String s) { |
| char c0 = s.isEmpty() ? 0 : s.charAt(0); |
| return ( |
| s.isEmpty() |
| || c0 == '@' |
| || c0 == '(' |
| || needsQuoteChars.contains(s) |
| || ( |
| maybeNeedsQuotesFirstChar.contains(c0) |
| && ( |
| "true".equals(s) |
| || "false".equals(s) |
| || "null".equals(s) |
| || isNumeric(s) |
| ) |
| ) |
| ); |
| } |
| } |