org.eclipse.digitaltwin.basyx.http.StandardizedLiteralEnumHelper Maven / Gradle / Ivy
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* Copyright (C) 2021 the Eclipse BaSyx Authors
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package org.eclipse.digitaltwin.basyx.http;
import com.google.common.base.Strings;
import org.eclipse.digitaltwin.basyx.core.StandardizedLiteralEnum;
/**
* Helper class to map custom string literals to StandardizedLiteralEnums.
*
* @author alexgordtop
*/
public class StandardizedLiteralEnumHelper {
/**
* Maps string literals of {@link StandardizedLiteralEnum}s to enum constants. The string literals read via
* getStandardizedLiteral() from the enum constants.
*
* @param Enum class implementing StandardizedLiteralEnum
* @param clazz Target enum with matching custom string literal
* @param literal The literal as contained in e.g. XML schema
* @return Enum constant
* @throws IllegalArgumentException when string literal is not found in enum.
*/
public static T fromLiteral(Class clazz, String literal) {
if (Strings.isNullOrEmpty(literal)) {
return null;
}
T[] enumConstants = clazz.getEnumConstants();
for (T constant : enumConstants) {
if (constant.getValue().equals(literal)) {
return constant;
}
}
throw new IllegalArgumentException("The literal '" + literal + "' is not contained in enum " + clazz.getName());
}
}