MapToBean

Takes a Scala Map, with String keys and object values, and generates a Java Bean object, with fields for each map value. Field that are, themselves, Map[String,Any] objects can be recursively mapped, as well. The map's keys are mapped to Java Bean get accessors. For instance, a key name "foo" is mapped to a method called getFoo().

The transformation results in an object that can only really be used via reflection; however, that fits fine with some APIs that want to receive Java Beans as parameters.

There are some restrictions imposed on any map that is to be converted.

- Only maps with string keys can be converted. - The string keys must be valid Java identifiers.

Here's a simple example:

import org.clapper.classutil._

val charList = List('1', '2', '3')

val subMap = Map("sub1" -> 1, "sub2" -> 2)
val m =  Map("oneInt" -> 1,
             "twoFloat" -> 2f,
             "threeString" -> "three",
             "fourIntClass" -> classOf[Int],
             "fiveMap" -> subMap,
             "sixList" -> charList)
val obj = MapToBean(m)

def showName(name: String) = (name startsWith "get")

obj.getClass.getMethods.filter(m => showName(m.getName)).foreach(println _)

def call(methodName: String) = {
  val method = obj.getClass.getMethod(methodName)
  method.invoke(obj)
}

println
println("getFiveMap returns " + call("getFiveMap"))

That Scala script will produce output like the following:

public final $Proxy0 $Proxy1.getFiveMap()
public final java.lang.Integer $Proxy1.getOneInt()
public final java.lang.Class $Proxy1.getFourIntClass()
public final scala.collection.immutable.$colon$colon $Proxy1.getSixList()
public final java.lang.Float $Proxy1.getTwoFloat()
public final java.lang.String $Proxy1.getThreeString()
public static java.lang.Class java.lang.reflect.Proxy.getProxyClass(java.lang.ClassLoader,java.lang.Class[]) throws java.lang.IllegalArgumentException
public static java.lang.reflect.InvocationHandler java.lang.reflect.Proxy.getInvocationHandler(java.lang.Object) throws java.lang.IllegalArgumentException
public final native java.lang.Class java.lang.Object.getClass()

getFiveMap returns Map(getSub1 -> 1, getSub2 -> 2)

Linear Supertypes

ClassNameGenerator, AnyRef, Any

Value Members

final def !=(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def !=(arg0: Any): Boolean

Definition Classes
Any
final def ##(): Int

Definition Classes
AnyRef → Any
final def ==(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def ==(arg0: Any): Boolean

Definition Classes
Any
val ClassNamePrefix: String

Definition Classes
MapToBean → ClassNameGenerator
def apply(map: Map[String, Any], className: String, recurse: Boolean): AnyRef

Transform a map into an object.
Transform a map into an object.
map
the map
className
the desired class name
recurse
true to recursively map nested maps, false otherwise. Recursively mapped maps will have generated class names.
returns
an instantiated object representing the map
def apply(map: Map[String, Any], recurse: Boolean = true): AnyRef

Transform a map into an object.
Transform a map into an object. The class name will be generated, will be in the org.clapper.classutil package, and will have a class name prefix of MapBean_.
map
the map
recurse
true to recursively map nested maps, false otherwise
returns
an instantiated object representing the map
final def asInstanceOf[T0]: T0

Definition Classes
Any
def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
AnyRef
def equals(arg0: Any): Boolean

Definition Classes
AnyRef → Any
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
AnyRef
Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
AnyRef → Any
def hashCode(): Int

Definition Classes
AnyRef → Any
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
final def ne(arg0: AnyRef): Boolean

Definition Classes
AnyRef
final def notify(): Unit

Definition Classes
AnyRef
final def notifyAll(): Unit

Definition Classes
AnyRef
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
AnyRef
def toString(): String

Definition Classes
AnyRef → Any
final def wait(): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
AnyRef
Annotations
@throws( ... )

object MapToBean extends ClassNameGenerator

Value Members

final def !=(arg0: AnyRef): Boolean

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: AnyRef): Boolean

final def ==(arg0: Any): Boolean

val ClassNamePrefix: String

def apply(map: Map[String, Any], className: String, recurse: Boolean): AnyRef

def apply(map: Map[String, Any], recurse: Boolean = true): AnyRef

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

final def synchronized[T0](arg0: ⇒ T0): T0

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

Inherited from ClassNameGenerator

Inherited from AnyRef

Inherited from Any

Ungrouped