Spring/spring-boot-data-geode
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Add test cases for getting the value of an Object Field.

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This commit is contained in:
John Blum
2018-09-19 23:57:07 -07:00
parent 6f18e2a084
commit b6e47a6578
2 changed files with 126 additions and 5 deletions
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49
spring-geode/src/main/java/org/springframework/geode/core/util/ObjectUtils.java
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@@ -49,7 +49,7 @@ public abstract class ObjectUtils extends org.springframework.util.ObjectUtils {
* the normal execution of the operation by rethrowing an {@link IllegalStateException} wrapping
* the checked {@link Exception}.
*
* @param <T> {@link Class type} of the operation result.
* @param <T> {@link Class type} of value returned from the operation execution.
* @param operation {@link ExceptionThrowingOperation} to execute.
* @return the result of the given {@link ExceptionThrowingOperation} or throw an {@link IllegalStateException}
* wrapping the checked {@link Exception} thrown by the operation.
@@ -66,7 +66,8 @@ public abstract class ObjectUtils extends org.springframework.util.ObjectUtils {
* during the normal execution of the operation, returning the {@link Object default value} in its place
* or throwing a {@link RuntimeException} if the {@link Object default value} is {@literal null}.
*
* @param <T> {@link Class type} of the operation result as well as the {@link Object default value}.
* @param <T> {@link Class type} of value returned from the operation execution as well as
* the {@link Object default value}.
* @param operation {@link ExceptionThrowingOperation} to execute.
* @param defaultValue {@link Object value} to return if the operation results in a checked {@link Exception}.
* @return the result of the given {@link ExceptionThrowingOperation}, returning the {@link Object default value}
@@ -75,6 +76,7 @@ public abstract class ObjectUtils extends org.springframework.util.ObjectUtils {
* @throws IllegalStateException if the {@link ExceptionThrowingOperation} throws a checked {@link Exception}
* and {@link Object default value} is {@literal null}.
* @see org.springframework.geode.core.util.ObjectUtils.ExceptionThrowingOperation
* @see #doOperationSafely(ExceptionThrowingOperation, Function)
* @see #returnValueThrowOnNull(Object, RuntimeException)
*/
@Nullable
@@ -86,6 +88,20 @@ public abstract class ObjectUtils extends org.springframework.util.ObjectUtils {
return doOperationSafely(operation, exceptionHandlingFunction);
}
/**
* Executes the given {@link ExceptionThrowingOperation} handling any checked {@link Exception} thrown
* during the normal execution of the operation by invoking the provided {@link Exception} handling
* {@link Function}.
*
* @param <T> {@link Class type} of value returned from the operation execution.
* @param operation {@link ExceptionThrowingOperation} to execute.
* @param exceptionHandlingFunction {@link Function} used to handle any {@link Exception} thrown by
* the {@link ExceptionThrowingOperation operation}.
* @return the result of executing the given {@link ExceptionThrowingOperation}.
* @see org.springframework.geode.core.util.ObjectUtils.ExceptionThrowingOperation
* @see java.util.function.Function
* @see java.lang.Throwable
*/
public static <T> T doOperationSafely(ExceptionThrowingOperation<T> operation,
Function<Throwable, T> exceptionHandlingFunction) {
@@ -102,10 +118,22 @@ public abstract class ObjectUtils extends org.springframework.util.ObjectUtils {
}
}
/**
* Gets the {@link Object value} of the given {@link String named} {@link Field} on the given {@link Object}.
*
* @param <T> {@link Class type} of the {@link Field Field's} value.
* @param obj {@link Object} containing the {@link String named} {@link Field}.
* @param fieldName {@link String} containing the name of the {@link Field}.
* @return the {@link Object value} of the {@link String named} {@link Field} on the given {@link Object}.
* @throws IllegalArgumentException if {@link Object} is {@literal null}, the {@link String named} {@link Field}
* is not specified or the given {@link Object} contains no {@link Field} with the given {@link String name}.
* @see #get(Object, Field)
* @see java.lang.Object
*/
public static <T> T get(Object obj, String fieldName) {
Assert.notNull(obj, "Object is requried");
Assert.hasText(fieldName, String.format("Field name [%s] is require", fieldName));
Assert.notNull(obj, "Object is required");
Assert.hasText(fieldName, String.format("Field name [%s] is required", fieldName));
return Optional.ofNullable(ReflectionUtils.findField(obj.getClass(), fieldName))
.map(ObjectUtils::makeAccessible)
@@ -114,9 +142,20 @@ public abstract class ObjectUtils extends org.springframework.util.ObjectUtils {
fieldName, ObjectUtils.nullSafeClassName(obj)));
}
/**
* Gets the {@link Object value} of the given {@link Field} on the given {@link Object}.
*
* @param <T> {@link Class type} of the {@link Field Field's} value.
* @param obj {@link Object} containing the {@link Field}.
* @param field {@link Field} of the given {@link Object}.
* @return the {@link Object value} of the {@link Field} on the given {@link Object}.
* @throws IllegalArgumentException if {@link Object} or {@link Field} is {@literal null}.
* @see java.lang.reflect.Field
* @see java.lang.Object
*/
public static <T> T get(Object obj, Field field) {
Assert.notNull(obj, "Object is requried");
Assert.notNull(obj, "Object is required");
Assert.notNull(field, "Field is required");
return doOperationSafely(() -> (T) field.get(obj), (T) null);