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/*
* SPDX-License-Identifier: Apache-2.0
*
* Copyright 2019 Tomasz Linkowski.
*
* 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 pl.tlinkowski.gradle.my.superpom.shared.internal
/**
* Validates given string as a JPMS module name.
*
* @author Tomasz Linkowski
*/
internal object ModuleNameValidator {
// https://docs.oracle.com/javase/specs/jls/se12/html/jls-3.html#jls-Keyword
// https://docs.oracle.com/javase/specs/jls/se12/html/jls-3.html#jls-BooleanLiteral
// https://docs.oracle.com/javase/specs/jls/se12/html/jls-3.html#jls-NullLiteral
private val keywordOrLiteral = Regex(
"abstract|continue|for|new|switch|assert|default|if|package|synchronized|boolean|do|goto|private|this|break|double|implements|protected|throw|byte|else|import|public|throws|case|enum|instanceof|return|transient|catch|extends|int|short|try|char|final|interface|static|void|class|finally|long|strictfp|volatile|const|float|native|super|while|_|true|false|null"
).pattern
// https://docs.oracle.com/javase/specs/jls/se12/html/jls-3.html#jls-Identifier
private val identifier = Regex("(?!(?:$keywordOrLiteral)(?:\\.|$))[A-Za-z_$][\\w$]*+").pattern
// https://docs.oracle.com/javase/specs/jls/se12/html/jls-7.html#jls-7.7
private val validModuleNameRegex = Regex("$identifier(\\.$identifier)*+")
/**
* Returns `true` if given `moduleName` is a valid JPMS module name as per
* [Java Language Specification](https://docs.oracle.com/javase/specs/jls/se12/html/jls-7.html#jls-7.7).
*/
fun isValidModuleName(moduleName: String) = validModuleNameRegex.matches(moduleName)
}
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