com.google.api.generator.gapic.utils.JavaStyle Maven / Gradle / Ivy
// Copyright 2020 Google LLC
//
// Licensed 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 com.google.api.generator.gapic.utils;
import com.google.api.generator.engine.lexicon.Keyword;
import com.google.common.base.CaseFormat;
import com.google.common.base.Strings;
import java.util.stream.IntStream;
public class JavaStyle {
private static final String UNDERSCORE = "_";
public static String toLowerCamelCase(String s) {
if (Strings.isNullOrEmpty(s)) {
return s;
}
s = s.replace('-', '_');
if (s.indexOf(UNDERSCORE) >= 0) {
s = CaseFormat.LOWER_UNDERSCORE.to(CaseFormat.UPPER_CAMEL, s);
}
String name =
capitalizeLettersAfterDigits(
String.format("%s%s", s.substring(0, 1).toLowerCase(), s.substring(1)));
// Some APIs use legit java keywords as method names. Both protobuf and gGRPC add an underscore
// in generated stubs to resolve name conflict, so we need to do the same.
return Keyword.escapeKeyword(name);
}
public static String toUpperCamelCase(String s) {
if (Strings.isNullOrEmpty(s)) {
return s;
}
s = s.replace('-', '_');
if (s.indexOf(UNDERSCORE) >= 0) {
s = CaseFormat.LOWER_UNDERSCORE.to(CaseFormat.UPPER_CAMEL, s);
}
return capitalizeLettersAfterDigits(
String.format("%s%s", s.substring(0, 1).toUpperCase(), s.substring(1)));
}
public static String toUpperSnakeCase(String s) {
String result = CaseFormat.UPPER_CAMEL.to(CaseFormat.UPPER_UNDERSCORE, toUpperCamelCase(s));
return result;
}
private static String capitalizeLettersAfterDigits(String s) {
return IntStream.range(0, s.length())
.collect(
StringBuilder::new,
(sb, i) ->
sb.append(
i > 0 && Character.isDigit(s.charAt(i - 1))
? Character.toUpperCase(s.charAt(i))
: s.charAt(i)),
StringBuilder::append)
.toString();
}
}
© 2015 - 2024 Weber Informatics LLC | Privacy Policy