Spring/spring-boot-data-geode
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Add utiliy method to invoke a method on an object.

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This commit is contained in:
John Blum
2018-08-29 10:06:33 -07:00
parent 2d01676f96
commit 2bd1afdb9e
2 changed files with 62 additions and 0 deletions
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33
spring-geode/src/main/java/org/springframework/geode/core/util/ObjectUtils.java
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@@ -19,15 +19,20 @@ package org.springframework.geode.core.util;
import static org.springframework.data.gemfire.util.RuntimeExceptionFactory.newIllegalArgumentException;
import static org.springframework.data.gemfire.util.RuntimeExceptionFactory.newIllegalStateException;
import java.lang.reflect.Method;
import java.util.Optional;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.lang.Nullable;
import org.springframework.util.ReflectionUtils;
/**
* The {@link ObjectUtils} class is an abstract utility class with operations for {@link Object objects}.
*
* @author John Blum
* @see java.lang.Object
* @see java.lang.reflect.Method
* @since 1.0.0
*/
@SuppressWarnings("all")
@@ -85,6 +90,34 @@ public abstract class ObjectUtils extends org.springframework.util.ObjectUtils {
}
}
/**
* Invokes a {@link Method} on an {@link Object} with the given {@link String name}.
*
* @param <T> {@link Class type} of the {@link Method} return value.
* @param obj {@link Object} on which to invoke the {@link Method}.
* @param methodName {@link String} containing the name of the {@link Method} to invoke on {@link Object}.
* @return the return value of the invoked {@link Method} on {@link Object}.
* @throws IllegalArgumentException if no {@link Method} with {@link String name} could be found on {@link Object}.
* @see java.lang.reflect.Method
* @see java.lang.Object
*/
@SuppressWarnings("unchecked")
public static <T> T invoke(Object obj, String methodName) {
return (T) Optional.ofNullable(obj)
.map(Object::getClass)
.map(type -> ReflectionUtils.findMethod(type, methodName))
.map(ObjectUtils::makeAccessible)
.map(method -> ReflectionUtils.invokeMethod(method, obj))
.orElseThrow(() -> newIllegalArgumentException("Method [%1$s] on Object of type [%2$s] not found",
methodName, org.springframework.util.ObjectUtils.nullSafeClassName(obj)));
}
private static Method makeAccessible(Method method) {
ReflectionUtils.makeAccessible(method);
return method;
}
/**
* Returns the given {@link Object value} or throws an {@link IllegalArgumentException}
* if {@link Object value} is {@literal null}.