| /* |
| * 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 freemarker.core; |
| |
| import freemarker.template.Configuration; |
| import freemarker.template.utility.StringUtil; |
| |
| /** |
| * For internal use only; don't depend on this, there's no backward compatibility guarantee at all! |
| * This class is to work around the lack of module system in Java, i.e., so that other FreeMarker packages can |
| * access things inside this package that users shouldn't. |
| */ |
| public final class _CoreStringUtils { |
| |
| private _CoreStringUtils() { |
| // No meant to be instantiated |
| } |
| |
| public static String toFTLIdentifierReferenceAfterDot(String name) { |
| return backslashEscapeIdentifier(name); |
| } |
| |
| public static String toFTLTopLevelIdentifierReference(String name) { |
| return backslashEscapeIdentifier(name); |
| } |
| |
| public static String toFTLTopLevelTragetIdentifier(final String name) { |
| char quotationType = 0; |
| scanForQuotationType: for (int i = 0; i < name.length(); i++) { |
| final char c = name.charAt(i); |
| if (!(i == 0 ? StringUtil.isFTLIdentifierStart(c) : StringUtil.isFTLIdentifierPart(c)) && c != '@') { |
| if ((quotationType == 0 || quotationType == '\\') && (c == '-' || c == '.' || c == ':')) { |
| quotationType = '\\'; |
| } else { |
| quotationType = '"'; |
| break scanForQuotationType; |
| } |
| } |
| } |
| switch (quotationType) { |
| case 0: |
| return name; |
| case '"': |
| return StringUtil.ftlQuote(name); |
| case '\\': |
| return backslashEscapeIdentifier(name); |
| default: |
| throw new BugException(); |
| } |
| } |
| |
| private static String backslashEscapeIdentifier(String name) { |
| return StringUtil.replace(StringUtil.replace(StringUtil.replace(name, "-", "\\-"), ".", "\\."), ":", "\\:"); |
| } |
| |
| /** |
| * @return {@link Configuration#CAMEL_CASE_NAMING_CONVENTION}, or {@link Configuration#LEGACY_NAMING_CONVENTION} |
| * or, {@link Configuration#AUTO_DETECT_NAMING_CONVENTION} when undecidable. |
| */ |
| public static int getIdentifierNamingConvention(String name) { |
| final int ln = name.length(); |
| for (int i = 0; i < ln; i++) { |
| final char c = name.charAt(i); |
| if (c == '_') { |
| return Configuration.LEGACY_NAMING_CONVENTION; |
| } |
| if (isUpperUSASCII(c)) { |
| return Configuration.CAMEL_CASE_NAMING_CONVENTION; |
| } |
| } |
| return Configuration.AUTO_DETECT_NAMING_CONVENTION; |
| } |
| |
| // [2.4] Won't be needed anymore |
| /** |
| * A deliberately very inflexible camel case to underscored converter; it must not convert improper camel case |
| * names to a proper underscored name. |
| */ |
| public static String camelCaseToUnderscored(String camelCaseName) { |
| int i = 0; |
| while (i < camelCaseName.length() && Character.isLowerCase(camelCaseName.charAt(i))) { |
| i++; |
| } |
| if (i == camelCaseName.length()) { |
| // No conversion needed |
| return camelCaseName; |
| } |
| |
| StringBuilder sb = new StringBuilder(); |
| sb.append(camelCaseName.substring(0, i)); |
| while (i < camelCaseName.length()) { |
| final char c = camelCaseName.charAt(i); |
| if (isUpperUSASCII(c)) { |
| sb.append('_'); |
| sb.append(Character.toLowerCase(c)); |
| } else { |
| sb.append(c); |
| } |
| i++; |
| } |
| return sb.toString(); |
| } |
| |
| public static boolean isUpperUSASCII(char c) { |
| return c >= 'A' && c <= 'Z'; |
| } |
| |
| } |