Package com.redis.riot.core

Class ReflectivePropertyAccessor

java.lang.Object

com.redis.riot.core.ReflectivePropertyAccessor

All Implemented Interfaces:

org.springframework.expression.PropertyAccessor

public class ReflectivePropertyAccessor
extends java.lang.Object
implements org.springframework.expression.PropertyAccessor

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ReflectivePropertyAccessor.OptimalPropertyAccessor	An optimized form of a PropertyAccessor that will use reflection but only knows how to access a particular property on a particular class.

Constructor Summary

Constructors

Constructor	Description
ReflectivePropertyAccessor()	Create a new property accessor for reading as well writing.
ReflectivePropertyAccessor(boolean allowWrite)	Create a new property accessor for reading and possibly writing.

Method Summary

Modifier and Type	Method	Description
boolean	canRead(org.springframework.expression.EvaluationContext context, java.lang.Object target, java.lang.String name)
boolean	canWrite(org.springframework.expression.EvaluationContext context, java.lang.Object target, java.lang.String name)
org.springframework.expression.PropertyAccessor	createOptimalAccessor(java.lang.Object target, java.lang.String name)	Attempt to create an optimized property accessor tailored for a property of a particular name on a particular class.
protected java.lang.reflect.Field	findField(java.lang.String name, java.lang.Class<?> clazz, boolean mustBeStatic)	Find a field of a certain name on a specified class.
java.lang.Class<?>[]	getSpecificTargetClasses()	Returns null which means this is a general purpose accessor.
protected boolean	isCandidateForProperty(java.lang.reflect.Method method, java.lang.Class<?> targetClass)	Determine whether the given Method is a candidate for property access on an instance of the given target class.
org.springframework.expression.TypedValue	read(org.springframework.expression.EvaluationContext context, java.lang.Object target, java.lang.String name)
void	write(org.springframework.expression.EvaluationContext context, java.lang.Object target, java.lang.String name, java.lang.Object newValue)

Methods inherited from class java.lang.Object

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

Constructor Detail

ReflectivePropertyAccessor

public ReflectivePropertyAccessor()

Create a new property accessor for reading as well writing.

See Also:

ReflectivePropertyAccessor(boolean)

ReflectivePropertyAccessor

public ReflectivePropertyAccessor(boolean allowWrite)

Create a new property accessor for reading and possibly writing.

Parameters:

allowWrite - whether to also allow for write operations

Since:

4.3.15

See Also:

canWrite(org.springframework.expression.EvaluationContext, java.lang.Object, java.lang.String)

Method Detail

getSpecificTargetClasses

@Nullable
public java.lang.Class<?>[] getSpecificTargetClasses()

Returns null which means this is a general purpose accessor.

Specified by:

getSpecificTargetClasses in interface org.springframework.expression.PropertyAccessor

canRead

public boolean canRead(org.springframework.expression.EvaluationContext context,
                       @Nullable
                       java.lang.Object target,
                       java.lang.String name)
                throws org.springframework.expression.AccessException

Specified by:

canRead in interface org.springframework.expression.PropertyAccessor

Throws:

org.springframework.expression.AccessException

read

public org.springframework.expression.TypedValue read(org.springframework.expression.EvaluationContext context,
                                                      @Nullable
                                                      java.lang.Object target,
                                                      java.lang.String name)
                                               throws org.springframework.expression.AccessException

Specified by:

read in interface org.springframework.expression.PropertyAccessor

Throws:

org.springframework.expression.AccessException

canWrite

public boolean canWrite(org.springframework.expression.EvaluationContext context,
                        @Nullable
                        java.lang.Object target,
                        java.lang.String name)
                 throws org.springframework.expression.AccessException

Specified by:

canWrite in interface org.springframework.expression.PropertyAccessor

Throws:

org.springframework.expression.AccessException

write

public void write(org.springframework.expression.EvaluationContext context,
                  @Nullable
                  java.lang.Object target,
                  java.lang.String name,
                  @Nullable
                  java.lang.Object newValue)
           throws org.springframework.expression.AccessException

Specified by:

write in interface org.springframework.expression.PropertyAccessor

Throws:

org.springframework.expression.AccessException

isCandidateForProperty

protected boolean isCandidateForProperty(java.lang.reflect.Method method,
                                         java.lang.Class<?> targetClass)

Determine whether the given Method is a candidate for property access on an instance of the given target class.

The default implementation considers any method as a candidate, even for non-user-declared properties on the Object base class.

Parameters:

method - the Method to evaluate

targetClass - the concrete target class that is being introspected

Since:

4.3.15

findField

@Nullable
protected java.lang.reflect.Field findField(java.lang.String name,
                                            java.lang.Class<?> clazz,
                                            boolean mustBeStatic)

Find a field of a certain name on a specified class.

createOptimalAccessor

public org.springframework.expression.PropertyAccessor createOptimalAccessor(@Nullable
                                                                             java.lang.Object target,
                                                                             java.lang.String name)

Attempt to create an optimized property accessor tailored for a property of a particular name on a particular class. The general ReflectivePropertyAccessor will always work but is not optimal due to the need to lookup which reflective member (method/field) to use each time read() is called. This method will just return the ReflectivePropertyAccessor instance if it is unable to build a more optimal accessor.

Note: An optimal accessor is currently only usable for read attempts. Do not call this method if you need a read-write accessor.

See Also:

ReflectivePropertyAccessor.OptimalPropertyAccessor