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/*******************************************************************************
* Copyright (c) 2015 Jeff Martin.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the GNU Lesser General Public
* License v3.0 which accompanies this distribution, and is available at
* http://www.gnu.org/licenses/lgpl.html
*
* Contributors:
* Jeff Martin - initial API and implementation
******************************************************************************/
package cuchaz.enigma.mapping;
import java.util.Arrays;
import java.util.List;
import java.util.regex.Pattern;
import javassist.bytecode.Descriptor;
public class NameValidator {
private static final Pattern IdentifierPattern;
private static final Pattern ClassPattern;
private static final List<String> ReservedWords = Arrays.asList(
"abstract", "continue", "for", "new", "switch", "assert", "default", "goto", "package", "synchronized",
"boolean", "do", "if", "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"
);
static {
// java allows all kinds of weird characters...
StringBuilder startChars = new StringBuilder();
StringBuilder partChars = new StringBuilder();
for (int i = Character.MIN_CODE_POINT; i <= Character.MAX_CODE_POINT; i++) {
if (Character.isJavaIdentifierStart(i)) {
startChars.appendCodePoint(i);
}
if (Character.isJavaIdentifierPart(i)) {
partChars.appendCodePoint(i);
}
}
String identifierRegex = "[A-Za-z_<][A-Za-z0-9_>]*";
IdentifierPattern = Pattern.compile(identifierRegex);
ClassPattern = Pattern.compile(String.format("^(%s(\\.|/))*(%s)$", identifierRegex, identifierRegex));
}
public static String validateClassName(String name, boolean packageRequired) {
if (name == null) {
return null;
}
if (!ClassPattern.matcher(name).matches() || ReservedWords.contains(name)) {
throw new IllegalNameException(name, "This doesn't look like a legal class name");
}
if (packageRequired && new ClassEntry(name).getPackageName() == null) {
throw new IllegalNameException(name, "Class must be in a package");
}
return Descriptor.toJvmName(name);
}
public static String validateFieldName(String name) {
if (name == null) {
return null;
}
if (!IdentifierPattern.matcher(name).matches() || ReservedWords.contains(name)) {
throw new IllegalNameException(name, "This doesn't look like a legal identifier");
}
return name;
}
public static String validateMethodName(String name) {
return validateFieldName(name);
}
public static String validateArgumentName(String name) {
return validateFieldName(name);
}
}
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