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ErrorUtils.java
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ErrorUtils.java
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/**
* Copyright (C) 2022 Czech Technical University in Prague
*
* This program is free software: you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details. You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cz.cvut.kbss.jopa.utils;
import java.util.function.Supplier;
public final class ErrorUtils {
/**
* Error message stating that an argument cannot be null. </p>
* <p>
* This message contains a placeholder {@code arg}, which should be replaced
* with the actual argument name.
*/
private static final String ARGUMENT_NULL = "Argument '$arg$' cannot be null.";
private static final String PLACEHOLDER = "$arg$";
private ErrorUtils() {
throw new AssertionError();
}
/**
* Provides a {@link NullPointerException} message supplier.
* <p>
* This supplier constructs messages which state than an argument with the specified name cannot be null.
*
* @param argName Argument name
* @return Error message supplier
*/
public static Supplier<String> getNPXMessageSupplier(final String argName) {
return () -> ARGUMENT_NULL.replace(PLACEHOLDER, argName);
}
}