Package com.expediagroup.transformer.utils

Class ReflectionUtils

java.lang.Object
com.expediagroup.transformer.utils.ReflectionUtils
public final class ReflectionUtils
extends java.lang.Object
Reflection class utils.

  • Constructor Summary

    Constructors
    Constructor Description
    ReflectionUtils()  

  • Method Summary

    Modifier and Type Method Description
    java.lang.Class<?> getArgumentTypeClass​(java.lang.Object argument, java.lang.String declaringClass, java.lang.String fieldName, boolean getNestedGenericClass)
    Gets the class of a given object.
    java.lang.Class<?> getArrayType​(java.lang.reflect.Field arrayField)
    Gets the type of an array.
    java.lang.reflect.Field getDeclaredField​(java.lang.String fieldName, java.lang.Class<?> targetClass)
    Return the field of the given class.
    java.lang.Class<?> getDeclaredFieldType​(java.lang.String fieldName, java.lang.Class<?> clazz)
    Return the class of the given field.
    <A extends java.lang.annotation.Annotation>
    A    		 getFieldAnnotation​(java.lang.reflect.Field field, java.lang.Class<A> annotationClazz)
    Returns (if existing) the field's given type annotation.
    java.lang.Object getFieldValue​(java.lang.Object target, java.lang.reflect.Field field)
    Gets the value of a field.
    java.lang.Object getFieldValue​(java.lang.Object target, java.lang.String fieldName, java.lang.Class<?> fieldType)
    Gets the value of a field through getter method.
    java.lang.Class<?> getGenericFieldType​(java.lang.reflect.Field field)
    Gets the generic infer type of an object.
    MapType getMapGenericType​(java.lang.reflect.Type fieldType, java.lang.String declaringClass, java.lang.String fieldName)
    Gets the generic infer type of a map object.
    <A extends java.lang.annotation.Annotation>
    A    		 getParameterAnnotation​(java.lang.reflect.Parameter parameter, java.lang.Class<A> annotationClazz, java.lang.String declaringClassName)
    Returns (if existing) the constructor parameter's given type annotation.
    java.lang.reflect.Method getSetterMethodForField​(java.lang.Class<?> fieldClass, java.lang.String fieldName, java.lang.Class<?> fieldType)
    Gets the setter method for a specific field.
    java.lang.Object invokeMethod​(java.lang.reflect.Method method, java.lang.Object target, java.lang.Object... args)
    Invokes the method.
    boolean isGetter​(java.lang.reflect.Method method)
    Checks if the given method is a getter.
    boolean isSetter​(java.lang.reflect.Method method)
    Checks if the given method is a setter.
    void setFieldValue​(java.lang.Object target, java.lang.reflect.Field field, java.lang.Object fieldValue)
    Set the value of a field.
    void setFieldValue​(java.lang.Object target, java.lang.String fieldName, java.lang.Object fieldValue)
    Set the value of a field.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • ReflectionUtils

      public ReflectionUtils()

  • Method Details

    • invokeMethod

      public java.lang.Object invokeMethod​(java.lang.reflect.Method method, java.lang.Object target, java.lang.Object... args)
      Invokes the method.
      Parameters:
      method - the method to be invoked.
      target - the class on which invoke the method
      args - the method parameters
      Returns:
      the method result

    • isSetter

      public boolean isSetter​(java.lang.reflect.Method method)
      Checks if the given method is a setter.
      Parameters:
      method - the method to be checked
      Returns:
      true if the method is a setter method, false otherwise

    • isGetter

      public boolean isGetter​(java.lang.reflect.Method method)
      Checks if the given method is a getter.
      Parameters:
      method - the method to be checked
      Returns:
      true if the method is a getter method, false otherwise

    • getFieldValue

      public java.lang.Object getFieldValue​(java.lang.Object target, java.lang.reflect.Field field)
      Gets the value of a field.
      Parameters:
      target - the field's class
      field - the field Field
      Returns:
      the field value

    • getFieldValue

      public java.lang.Object getFieldValue​(java.lang.Object target, java.lang.String fieldName, java.lang.Class<?> fieldType)
      Gets the value of a field through getter method.
      Parameters:
      target - the field's class
      fieldName - the field name
      fieldType - the field type
      Returns:
      the field value

    • getFieldAnnotation

      public <A extends java.lang.annotation.Annotation> A getFieldAnnotation​(java.lang.reflect.Field field, java.lang.Class<A> annotationClazz)
      Returns (if existing) the field's given type annotation.
      Type Parameters:
      A - the annotation type object
      Parameters:
      field - the field that should have the annotation
      annotationClazz - the annotation type
      Returns:
      the annotation

    • getParameterAnnotation

      public <A extends java.lang.annotation.Annotation> A getParameterAnnotation​(java.lang.reflect.Parameter parameter, java.lang.Class<A> annotationClazz, java.lang.String declaringClassName)
      Returns (if existing) the constructor parameter's given type annotation.
      Type Parameters:
      A - the annotation type object
      Parameters:
      parameter - the field that should have the annotation
      annotationClazz - the annotation type
      declaringClassName - the class name that contains the parameter
      Returns:
      the annotation

    • getDeclaredField

      public java.lang.reflect.Field getDeclaredField​(java.lang.String fieldName, java.lang.Class<?> targetClass)
      Return the field of the given class.
      Parameters:
      fieldName - the name of the field to retrieve.
      targetClass - the field's class
      Returns:
      the field corresponding to the given name.

    • getDeclaredFieldType

      public java.lang.Class<?> getDeclaredFieldType​(java.lang.String fieldName, java.lang.Class<?> clazz)
      Return the class of the given field.
      Parameters:
      fieldName - the name of the filed to retrieve.
      clazz - the field's class
      Returns:
      the class field of the given field.

    • setFieldValue

      public void setFieldValue​(java.lang.Object target, java.lang.String fieldName, java.lang.Object fieldValue)
      Set the value of a field.
      Parameters:
      target - the field's class
      fieldName - the field name to set
      fieldValue - the value to set

    • setFieldValue

      public void setFieldValue​(java.lang.Object target, java.lang.reflect.Field field, java.lang.Object fieldValue)
      Set the value of a field.
      Parameters:
      target - the field's class
      field - the field to set
      fieldValue - the value to set

    • getSetterMethodForField

      public java.lang.reflect.Method getSetterMethodForField​(java.lang.Class<?> fieldClass, java.lang.String fieldName, java.lang.Class<?> fieldType)
      Gets the setter method for a specific field.
      Parameters:
      fieldClass - class containing the field
      fieldName - the name of the field to be retrieved
      fieldType - the field class
      Returns:
      the setter method
      Throws:
      MissingMethodException - if the method does not exists

    • getGenericFieldType

      public java.lang.Class<?> getGenericFieldType​(java.lang.reflect.Field field)
      Gets the generic infer type of an object.
      Parameters:
      field - the field containing the generic
      Returns:
      the generic type class

    • getMapGenericType

      public MapType getMapGenericType​(java.lang.reflect.Type fieldType, java.lang.String declaringClass, java.lang.String fieldName)
      Gets the generic infer type of a map object.
      Parameters:
      fieldType - the field containing the generic
      declaringClass - the class containing the field
      fieldName - the field name
      Returns:
      the generic type class

    • getArgumentTypeClass

      public java.lang.Class<?> getArgumentTypeClass​(java.lang.Object argument, java.lang.String declaringClass, java.lang.String fieldName, boolean getNestedGenericClass)
      Gets the class of a given object.
      Parameters:
      argument - the object from which the class has to be retrieved
      declaringClass - the class containing the field of which the argument belongs to
      fieldName - the field name of which the argument belongs to
      getNestedGenericClass - if true it retrieves the class of the object generic (if any). i.e. argument = List<String>; returns String, if false returns List
      Returns:
      the given argument class type

    • getArrayType

      public java.lang.Class<?> getArrayType​(java.lang.reflect.Field arrayField)
      Gets the type of an array.
      Parameters:
      arrayField - the array
      Returns:
      the array class