mirror of https://github.com/alibaba/easyexcel
Jiaju Zhuang
4 years ago
19 changed files with 551 additions and 113 deletions
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package com.alibaba.excel.util; |
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import java.lang.reflect.AccessibleObject; |
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import java.lang.reflect.Member; |
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import java.lang.reflect.Modifier; |
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/** |
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* Member utils. |
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* |
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* @author Jiaju Zhuang |
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*/ |
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public class MemberUtils { |
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private static final int ACCESS_TEST = Modifier.PUBLIC | Modifier.PROTECTED | Modifier.PRIVATE; |
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/** |
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* XXX Default access superclass workaround. |
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* |
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* When a {@code public} class has a default access superclass with {@code public} members, |
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* these members are accessible. Calling them from compiled code works fine. |
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* Unfortunately, on some JVMs, using reflection to invoke these members |
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* seems to (wrongly) prevent access even when the modifier is {@code public}. |
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* Calling {@code setAccessible(true)} solves the problem but will only work from |
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* sufficiently privileged code. Better workarounds would be gratefully |
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* accepted. |
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* @param o the AccessibleObject to set as accessible |
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* @return a boolean indicating whether the accessibility of the object was set to true. |
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*/ |
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static boolean setAccessibleWorkaround(final AccessibleObject o) { |
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if (o == null || o.isAccessible()) { |
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return false; |
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} |
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final Member m = (Member) o; |
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if (!o.isAccessible() && Modifier.isPublic(m.getModifiers()) && isPackageAccess(m.getDeclaringClass().getModifiers())) { |
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try { |
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o.setAccessible(true); |
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return true; |
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} catch (final SecurityException e) { // NOPMD
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// ignore in favor of subsequent IllegalAccessException
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} |
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} |
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return false; |
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} |
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/** |
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* Returns whether a given set of modifiers implies package access. |
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* @param modifiers to test |
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* @return {@code true} unless {@code package}/{@code protected}/{@code private} modifier detected |
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*/ |
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static boolean isPackageAccess(final int modifiers) { |
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return (modifiers & ACCESS_TEST) == 0; |
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} |
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} |
@ -0,0 +1,151 @@
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package com.alibaba.excel.util; |
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import java.util.Objects; |
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/** |
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* Validate |
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* |
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* @author Jiaju Zhuang |
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*/ |
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public class Validate { |
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private static final String DEFAULT_IS_TRUE_EX_MESSAGE = "The validated expression is false"; |
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private static final String DEFAULT_IS_NULL_EX_MESSAGE = "The validated object is null"; |
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/** |
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* <p>Validate that the argument condition is {@code true}; otherwise |
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* throwing an exception with the specified message. This method is useful when |
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* validating according to an arbitrary boolean expression, such as validating a |
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* primitive number or using your own custom validation expression.</p> |
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* |
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* <pre>Validate.isTrue(i > 0.0, "The value must be greater than zero: %d", i);</pre> |
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* |
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* <p>For performance reasons, the long value is passed as a separate parameter and |
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* appended to the exception message only in the case of an error.</p> |
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* |
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* @param expression the boolean expression to check |
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* @param message the {@link String#format(String, Object...)} exception message if invalid, not null |
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* @param value the value to append to the message when invalid |
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* @throws IllegalArgumentException if expression is {@code false} |
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* @see #isTrue(boolean) |
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* @see #isTrue(boolean, String, double) |
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* @see #isTrue(boolean, String, Object...) |
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*/ |
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public static void isTrue(final boolean expression, final String message, final long value) { |
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if (!expression) { |
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throw new IllegalArgumentException(String.format(message, Long.valueOf(value))); |
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} |
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} |
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/** |
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* <p>Validate that the argument condition is {@code true}; otherwise |
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* throwing an exception with the specified message. This method is useful when |
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* validating according to an arbitrary boolean expression, such as validating a |
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* primitive number or using your own custom validation expression.</p> |
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* |
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* <pre>Validate.isTrue(d > 0.0, "The value must be greater than zero: %s", d);</pre> |
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* |
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* <p>For performance reasons, the double value is passed as a separate parameter and |
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* appended to the exception message only in the case of an error.</p> |
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* |
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* @param expression the boolean expression to check |
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* @param message the {@link String#format(String, Object...)} exception message if invalid, not null |
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* @param value the value to append to the message when invalid |
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* @throws IllegalArgumentException if expression is {@code false} |
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* @see #isTrue(boolean) |
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* @see #isTrue(boolean, String, long) |
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* @see #isTrue(boolean, String, Object...) |
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*/ |
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public static void isTrue(final boolean expression, final String message, final double value) { |
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if (!expression) { |
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throw new IllegalArgumentException(String.format(message, Double.valueOf(value))); |
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} |
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} |
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/** |
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* <p>Validate that the argument condition is {@code true}; otherwise |
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* throwing an exception with the specified message. This method is useful when |
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* validating according to an arbitrary boolean expression, such as validating a |
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* primitive number or using your own custom validation expression.</p> |
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* |
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* <pre> |
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* Validate.isTrue(i >= min && i <= max, "The value must be between %d and %d", min, max); |
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* Validate.isTrue(myObject.isOk(), "The object is not okay");</pre> |
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* |
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* @param expression the boolean expression to check |
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* @param message the {@link String#format(String, Object...)} exception message if invalid, not null |
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* @param values the optional values for the formatted exception message, null array not recommended |
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* @throws IllegalArgumentException if expression is {@code false} |
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* @see #isTrue(boolean) |
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* @see #isTrue(boolean, String, long) |
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* @see #isTrue(boolean, String, double) |
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*/ |
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public static void isTrue(final boolean expression, final String message, final Object... values) { |
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if (!expression) { |
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throw new IllegalArgumentException(String.format(message, values)); |
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} |
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} |
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/** |
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* <p>Validate that the argument condition is {@code true}; otherwise |
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* throwing an exception. This method is useful when validating according |
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* to an arbitrary boolean expression, such as validating a |
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* primitive number or using your own custom validation expression.</p> |
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* |
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* <pre> |
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* Validate.isTrue(i > 0); |
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* Validate.isTrue(myObject.isOk());</pre> |
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* |
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* <p>The message of the exception is "The validated expression is |
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* false".</p> |
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* |
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* @param expression the boolean expression to check |
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* @throws IllegalArgumentException if expression is {@code false} |
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* @see #isTrue(boolean, String, long) |
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* @see #isTrue(boolean, String, double) |
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* @see #isTrue(boolean, String, Object...) |
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*/ |
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public static void isTrue(final boolean expression) { |
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if (!expression) { |
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throw new IllegalArgumentException(DEFAULT_IS_TRUE_EX_MESSAGE); |
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} |
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} |
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/** |
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* <p>Validate that the specified argument is not {@code null}; |
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* otherwise throwing an exception. |
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* |
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* <pre>Validate.notNull(myObject, "The object must not be null");</pre> |
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* |
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* <p>The message of the exception is "The validated object is |
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* null".</p> |
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* |
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* @param <T> the object type |
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* @param object the object to check |
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* @return the validated object (never {@code null} for method chaining) |
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* @throws NullPointerException if the object is {@code null} |
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* @see #notNull(Object, String, Object...) |
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*/ |
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public static <T> T notNull(final T object) { |
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return notNull(object, DEFAULT_IS_NULL_EX_MESSAGE); |
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} |
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/** |
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* <p>Validate that the specified argument is not {@code null}; |
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* otherwise throwing an exception with the specified message. |
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* |
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* <pre>Validate.notNull(myObject, "The object must not be null");</pre> |
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* |
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* @param <T> the object type |
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* @param object the object to check |
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* @param message the {@link String#format(String, Object...)} exception message if invalid, not null |
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* @param values the optional values for the formatted exception message |
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* @return the validated object (never {@code null} for method chaining) |
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* @throws NullPointerException if the object is {@code null} |
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* @see #notNull(Object) |
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*/ |
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public static <T> T notNull(final T object, final String message, final Object... values) { |
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return Objects.requireNonNull(object, () -> String.format(message, values)); |
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} |
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} |
@ -0,0 +1,22 @@
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package com.alibaba.excel.write.handler.impl; |
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import com.alibaba.excel.write.handler.RowWriteHandler; |
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import com.alibaba.excel.write.metadata.holder.WriteSheetHolder; |
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import com.alibaba.excel.write.metadata.holder.WriteTableHolder; |
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import lombok.extern.slf4j.Slf4j; |
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import org.apache.poi.ss.usermodel.Row; |
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/** |
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* Default row handler. |
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* |
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* @author Jiaju Zhuang |
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*/ |
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@Slf4j |
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public class DefaultRowWriteHandler implements RowWriteHandler { |
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@Override |
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public void afterRowDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row, |
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Integer relativeRowIndex, Boolean isHead) { |
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writeSheetHolder.setLastRowIndex(row.getRowNum()); |
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} |
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} |
@ -0,0 +1,76 @@
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package com.alibaba.excel.write.handler.impl; |
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import java.lang.reflect.Field; |
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import java.util.Map; |
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import com.alibaba.excel.util.FieldUtils; |
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import com.alibaba.excel.write.handler.WorkbookWriteHandler; |
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import com.alibaba.excel.write.metadata.holder.WriteSheetHolder; |
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import com.alibaba.excel.write.metadata.holder.WriteWorkbookHolder; |
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import lombok.extern.slf4j.Slf4j; |
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import org.apache.commons.collections4.MapUtils; |
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import org.apache.poi.ss.util.CellReference; |
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import org.apache.poi.xssf.streaming.SXSSFSheet; |
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import org.apache.poi.xssf.streaming.SXSSFWorkbook; |
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import org.apache.poi.xssf.usermodel.XSSFSheet; |
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import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorksheet; |
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/** |
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* Handle the problem of unable to write dimension. |
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* |
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* https://github.com/alibaba/easyexcel/issues/1282
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* |
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* @author Jiaju Zhuang |
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*/ |
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@Slf4j |
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public class DimensionWorkbookWriteHandler implements WorkbookWriteHandler { |
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private static final String XSSF_SHEET_MEMBER_VARIABLE_NAME = "_sh"; |
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private static final Field XSSF_SHEET_FIELD = FieldUtils.getField(SXSSFSheet.class, XSSF_SHEET_MEMBER_VARIABLE_NAME, |
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true); |
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@Override |
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public void afterWorkbookDispose(WriteWorkbookHolder writeWorkbookHolder) { |
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if (writeWorkbookHolder == null || writeWorkbookHolder.getWorkbook() == null) { |
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return; |
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} |
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if (!(writeWorkbookHolder.getWorkbook() instanceof SXSSFWorkbook)) { |
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return; |
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} |
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Map<Integer, WriteSheetHolder> writeSheetHolderMap = writeWorkbookHolder.getHasBeenInitializedSheetIndexMap(); |
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if (MapUtils.isEmpty(writeSheetHolderMap)) { |
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return; |
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} |
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for (WriteSheetHolder writeSheetHolder : writeSheetHolderMap.values()) { |
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if (writeSheetHolder.getSheet() == null || !(writeSheetHolder.getSheet() instanceof SXSSFSheet)) { |
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continue; |
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} |
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SXSSFSheet sxssfSheet = ((SXSSFSheet)writeSheetHolder.getSheet()); |
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XSSFSheet xssfSheet; |
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try { |
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xssfSheet = (XSSFSheet)XSSF_SHEET_FIELD.get(sxssfSheet); |
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} catch (IllegalAccessException e) { |
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log.debug("Can not found _sh.", e); |
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continue; |
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} |
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if (xssfSheet == null) { |
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continue; |
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} |
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CTWorksheet ctWorksheet = xssfSheet.getCTWorksheet(); |
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if (ctWorksheet == null) { |
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continue; |
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} |
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int headSize = 0; |
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if (MapUtils.isNotEmpty(writeSheetHolder.getExcelWriteHeadProperty().getHeadMap())) { |
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headSize = writeSheetHolder.getExcelWriteHeadProperty().getHeadMap().size(); |
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if (headSize > 0) { |
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headSize--; |
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} |
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} |
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ctWorksheet.getDimension().setRef( |
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"A1:" + CellReference.convertNumToColString(headSize) + (writeSheetHolder.getLastRowIndex() + 1)); |
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} |
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} |
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} |
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