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FreeMarker is a "template engine"; a generic tool to generate text output based on templates.
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package freemarker.template.utility;
/**
* Indicates that an argument that must be non-{@code null} was {@code null}.
*
* @since 2.3.20
*/
public class NullArgumentException extends IllegalArgumentException {
public NullArgumentException() {
super("The argument can't be null");
}
public NullArgumentException(String argumentName) {
super("The \"" + argumentName + "\" argument can't be null");
}
public NullArgumentException(String argumentName, String details) {
super("The \"" + argumentName + "\" argument can't be null. " + details);
}
/**
* Convenience method to protect against a {@code null} argument.
*/
public static void check(String argumentName, Object argumentValue) {
if (argumentValue == null) {
throw new NullArgumentException(argumentName);
}
}
/**
* @since 2.3.22
*/
public static void check(Object argumentValue) {
if (argumentValue == null) {
throw new NullArgumentException();
}
}
}
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