easyexcel/src/main/java/com/alibaba/excel/util/Validate.java

package com.alibaba.excel.util;

import java.util.Objects;

/**
 * Validate
 *
 * @author Jiaju Zhuang
 */
public class Validate {

    private static final String DEFAULT_IS_TRUE_EX_MESSAGE = "The validated expression is false";
    private static final String DEFAULT_IS_NULL_EX_MESSAGE = "The validated object is null";

    /**
     * <p>Validate that the argument condition is {@code true}; otherwise
     * throwing an exception with the specified message. This method is useful when
     * validating according to an arbitrary boolean expression, such as validating a
     * primitive number or using your own custom validation expression.</p>
     *
     * <pre>Validate.isTrue(i &gt; 0.0, "The value must be greater than zero: &#37;d", i);</pre>
     *
     * <p>For performance reasons, the long value is passed as a separate parameter and
     * appended to the exception message only in the case of an error.</p>
     *
     * @param expression  the boolean expression to check
     * @param message  the {@link String#format(String, Object...)} exception message if invalid, not null
     * @param value  the value to append to the message when invalid
     * @throws IllegalArgumentException if expression is {@code false}
     * @see #isTrue(boolean)
     * @see #isTrue(boolean, String, double)
     * @see #isTrue(boolean, String, Object...)
     */
    public static void isTrue(final boolean expression, final String message, final long value) {
        if (!expression) {
            throw new IllegalArgumentException(String.format(message, Long.valueOf(value)));
        }
    }

    /**
     * <p>Validate that the argument condition is {@code true}; otherwise
     * throwing an exception with the specified message. This method is useful when
     * validating according to an arbitrary boolean expression, such as validating a
     * primitive number or using your own custom validation expression.</p>
     *
     * <pre>Validate.isTrue(d &gt; 0.0, "The value must be greater than zero: &#37;s", d);</pre>
     *
     * <p>For performance reasons, the double value is passed as a separate parameter and
     * appended to the exception message only in the case of an error.</p>
     *
     * @param expression  the boolean expression to check
     * @param message  the {@link String#format(String, Object...)} exception message if invalid, not null
     * @param value  the value to append to the message when invalid
     * @throws IllegalArgumentException if expression is {@code false}
     * @see #isTrue(boolean)
     * @see #isTrue(boolean, String, long)
     * @see #isTrue(boolean, String, Object...)
     */
    public static void isTrue(final boolean expression, final String message, final double value) {
        if (!expression) {
            throw new IllegalArgumentException(String.format(message, Double.valueOf(value)));
        }
    }

    /**
     * <p>Validate that the argument condition is {@code true}; otherwise
     * throwing an exception with the specified message. This method is useful when
     * validating according to an arbitrary boolean expression, such as validating a
     * primitive number or using your own custom validation expression.</p>
     *
     * <pre>
     * Validate.isTrue(i &gt;= min &amp;&amp; i &lt;= max, "The value must be between &#37;d and &#37;d", min, max);
     * Validate.isTrue(myObject.isOk(), "The object is not okay");</pre>
     *
     * @param expression  the boolean expression to check
     * @param message  the {@link String#format(String, Object...)} exception message if invalid, not null
     * @param values  the optional values for the formatted exception message, null array not recommended
     * @throws IllegalArgumentException if expression is {@code false}
     * @see #isTrue(boolean)
     * @see #isTrue(boolean, String, long)
     * @see #isTrue(boolean, String, double)
     */
    public static void isTrue(final boolean expression, final String message, final Object... values) {
        if (!expression) {
            throw new IllegalArgumentException(String.format(message, values));
        }
    }

    /**
     * <p>Validate that the argument condition is {@code true}; otherwise
     * throwing an exception. This method is useful when validating according
     * to an arbitrary boolean expression, such as validating a
     * primitive number or using your own custom validation expression.</p>
     *
     * <pre>
     * Validate.isTrue(i &gt; 0);
     * Validate.isTrue(myObject.isOk());</pre>
     *
     * <p>The message of the exception is &quot;The validated expression is
     * false&quot;.</p>
     *
     * @param expression  the boolean expression to check
     * @throws IllegalArgumentException if expression is {@code false}
     * @see #isTrue(boolean, String, long)
     * @see #isTrue(boolean, String, double)
     * @see #isTrue(boolean, String, Object...)
     */
    public static void isTrue(final boolean expression) {
        if (!expression) {
            throw new IllegalArgumentException(DEFAULT_IS_TRUE_EX_MESSAGE);
        }
    }


    /**
     * <p>Validate that the specified argument is not {@code null};
     * otherwise throwing an exception.
     *
     * <pre>Validate.notNull(myObject, "The object must not be null");</pre>
     *
     * <p>The message of the exception is &quot;The validated object is
     * null&quot;.</p>
     *
     * @param <T> the object type
     * @param object  the object to check
     * @return the validated object (never {@code null} for method chaining)
     * @throws NullPointerException if the object is {@code null}
     * @see #notNull(Object, String, Object...)
     */
    public static <T> T notNull(final T object) {
        return notNull(object, DEFAULT_IS_NULL_EX_MESSAGE);
    }

    /**
     * <p>Validate that the specified argument is not {@code null};
     * otherwise throwing an exception with the specified message.
     *
     * <pre>Validate.notNull(myObject, "The object must not be null");</pre>
     *
     * @param <T> the object type
     * @param object  the object to check
     * @param message  the {@link String#format(String, Object...)} exception message if invalid, not null
     * @param values  the optional values for the formatted exception message
     * @return the validated object (never {@code null} for method chaining)
     * @throws NullPointerException if the object is {@code null}
     * @see #notNull(Object)
     */
    public static <T> T notNull(final T object, final String message, final Object... values) {
        return Objects.requireNonNull(object, () -> String.format(message, values));
    }
}