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/*
* SPDX-FileCopyrightText: 2021-2024 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.language.naming;
import org.eclipse.xtext.naming.QualifiedName;
import java.util.regex.Pattern;
public final class NamingUtil {
private static final String SINGLETON_VARIABLE_PREFIX = "_";
public static final QualifiedName ROOT_NAME = QualifiedName.create("");
private static final Pattern ID_REGEX = Pattern.compile("[_a-zA-Z]\\w*");
private NamingUtil() {
throw new IllegalStateException("This is a static utility class and should not be instantiated directly");
}
public static boolean isNullOrEmpty(String name) {
return name == null || name.isEmpty();
}
public static boolean isSingletonVariableName(String name) {
return name != null && name.startsWith(SINGLETON_VARIABLE_PREFIX);
}
// This method name only makes sense if it checks for the positive case.
@SuppressWarnings("BooleanMethodIsAlwaysInverted")
public static boolean isValidId(String name) {
return name != null && ID_REGEX.matcher(name).matches();
}
public static boolean isFullyQualified(QualifiedName name) {
return name.startsWith(ROOT_NAME);
}
public static QualifiedName stripRootPrefix(QualifiedName name) {
if (name == null) {
return null;
}
return isFullyQualified(name) ? name.skipFirst(ROOT_NAME.getSegmentCount()) : name;
}
public static QualifiedName addRootPrefix(QualifiedName name) {
if (name == null) {
return null;
}
return isFullyQualified(name) ? name : ROOT_NAME.append(name);
}
}
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