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.codegen_2.12.2.2.0-M2.source-code.Preconditions Maven / Gradle / Ivy

/******************************************************************************
 * Copyright (c) 2019 TypeFox and others.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 ******************************************************************************/
package org.eclipse.lsp4j.util;

/**
 * Utilities for checking method and constructor arguments.
 */
public final class Preconditions {

    private Preconditions() {
    }

    private static boolean nullChecks = true;

    public static void enableNullChecks(boolean enable) {
        Preconditions.nullChecks = enable;
    }

    public static  T checkNotNull(T object, String propertyName) {
        if (nullChecks && object == null) {
            throw new IllegalArgumentException("Property must not be null: " + propertyName);
        }
        return object;
    }

}