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• NullArgumentException.java

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package com.github.japgolly.android.test.param;

public class NullArgumentException extends RuntimeException {
	private static final long serialVersionUID = 1L;

	private String argumentName;

	public String getArgumentName() {
		return argumentName;
	}

	public NullArgumentException(String argumentName) {
		super(getMessage(argumentName));
		this.argumentName = argumentName;
	}

	private static String getMessage(String argumentName) {
		if (argumentName == null) {
			throw new IllegalArgumentException("The NullArgumentException constructor \"argumentName\" cannot be null!");
		}
		if (argumentName.trim().length() == 0) {
			throw new IllegalArgumentException(
					"The NullArgumentException constructor \"argumentName\" cannot be an Empty (zero-length) String!");
		}
		return "Argument \"" + argumentName + "\" cannot be null!";
	}
}